NL-13-1528, Response to Request for Information on the Plant Hatch License Amendment Request to Revise the Minimum Water Level in the Plant Service Water Pump Well

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Response to Request for Information on the Plant Hatch License Amendment Request to Revise the Minimum Water Level in the Plant Service Water Pump Well
ML13204A044
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 07/22/2013
From: Pierce C
Southern Co, Southern Nuclear Operating Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
NL-13-1528
Download: ML13204A044 (151)
v • d • e


Text

{{#Wiki_filter:Charles R. Pierce Southern Nuclear R egulat ory Affairs Director Operating Company, Inc. 4 0 Inverness Center Parkwa y P o st Office Box 1295 Bi rm i n g h am , Alabama 35201 Tel 205.9 92.7872 Fax 20 5.992.7601 July 22, 2013 SOUTHERN ' \' COMPANY Docket 1\1 os. : 50-321 NL-13-1528 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Response to Request for Information on the Plant Hatch License Request to Revise the Minimum Water in the Plant Service Water Pump

References:

1. Southern Nuclear Operating Company Letter, NL-12-1 078, dated July 5,2012, "License Amendment Request to Revise the Minimum Water Level in the Plant Service Water Pump Well". NRC Letter dated September 11, 2012, "Request for Additional Information (TAG NOS. ME9004, ME9005)".
3. Southern Nuclear Operating Company Letter, NL-12-1916, dated October 10, 2012, "Request to Revise the Plant Service Water Well Minimum Water Level Response to Request for Additional Information Regarding the Environmental Evaluation".

Ladies and Gentlemen: By Reference 1, Southern Nuclear Operating Company (SNC) requested amendments to the Edwin I. Hatch Nuclear Plant Units 1 and 2 Technical Specifications (TS). The proposed amendments would revise the minimum water level referenced in the Units 1 and 2 TS Surveillance Requirement associated with the Limiting Condition for Operation (LCO) for the plant service water system (PSW) system and ultimate heat sink (LCO 3.7.2). By Reference 2, NRC requested additional information regarding the referenced submittal and, by Reference 3, SNC provided the response. u.s. Nuclear Regulatory Commission NL-13-1528 Page 2 On April 17, 2013, SNC and NRC personnel held a phone call to clarify environmental issues associated with the impact of the proposed change on the Spiney Mussel, a type of Mussel found in the Altamaha River. During the phone call, SNC personnel discussed publically available information on dredging permits issued to SNC during the last several years, as well as recent communications with U.S. Fish and Wildlife Service personnel. At the conclusion of the call, SNC agreed to provide copies of communications with the Fish and Wildlife Service regarding endangered species, recent dredging information and the last dredging permit application. That information was provided to NRC informally. Recently, NRC requested further information, specifically a between SNC and the U.S. Fish and Wildlife Service from l\Iovember of 2006That correspondence is included in the Enclosure to this This letter contains no NRC commitments. If you have any questions, please contact Ken McElroy at (205) 992-7369. Mr. C. R. Pierce states he is Regulatory Affairs Director of Southern Operating Company, is authorized to execute this oath on behalf of Nuclear Operating Company and, to the best of his knowledge and belief, facts set forth in this letter are Respectfully submitted, Mr. C. R. Pierce Regulatory Affairs Director CRP/OCV/ Sworn to and subscribed before me this day ___, 2013./) r if

f! Notary Public My commission expires
11-11 2 -13 U.S. Nuclear Regulatory Commission NL-13-1528 Page 3

Enclosure:

SNC Letter from J.M. Godfrey, Environmental Affairs Manager, SNC, to Jimmy Rickard, U.S. Fish and Wildlife Biologist, November 10, 2006, and attachments. Southern Nuclear Operating Company Mr. S. E. Kuczynski, Chairman, President &CEO Mr. D. G. Bost, Executive Vice President & Chief Nuclear Officer Mr. D. R. Madison, Vice President -Hatch Mr. B. L. Ivey, Vice President -Regulatory Affairs Mr. B. J. Adams, Vice President -Fleet Operations RTYPE: CHA02.004 U. S. Nuclear Regulatory Mr. V. M. McCree, Regional Mr. R. E. Martin, NRR Senior Project Manager -IVIr. E. D. Morris, Senior Resident Inspector -State of Georgia Mr. J.H. Turner, Environmental Director Protection Division U.S. Fish and Wildlife Mr. Jimmy Rickard, Edwin I. Hatch Nuclear Response to Request for Information on the Plant Hatch Amendment Request to Revise the Minimum Water in the Plant Service Water Pump Correspondence from SNC to U.S. Fish and Wildlife Dated November 10, Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Southern Nuclear Operating Company. Inc. 42 Inverness Ce n ter Parkway Birmingham .Al a bama 35242 SOUTHERN;"* COMPANY Energy to Serve Your World"' File: E.02.16 Log: EV-06-2576 November 10, 2006 Mr. Jimmy Fish and Wildlife U.S. Fish and Wildlife 105 Westpark Drive, Suite Athens, Georgia

Dear Mr. Rickard:

Southern Nuclear (SNC) and Georgia Power (GPC) have re-evaluated studies reports addressing incorrect statements in the Species Assessment and Listing Assignment (SALPA) (June 10,2004) relative to the operation of Plant Hatch and potential for that operation to impact the environment. As stated in our previous dated October 27,2005, Plant Hatch uses closed cycle cooling towers. towers, are considered Best Available Technology (BAT) by the Protection Agency and are designed specifically to minimize impingement entrainment as well as thermal discharge concerns mentioned in the SALPA. . cooling towers dissipate most of the excess heat generated from equipment cooling associated with electricity production through evaporation, reducing both the volume of water withdrawn (thereby reducing impingement and entrainment by a significant percentage) and temperature of the thermal discharge. Additionally, information and data is provided to correct statements regarding dredging and flows contained in the SALPA. The following paragraphs summarize the information discussed above. Entrainment. The percent of eggs, and larvae entrained (assuming a uniform distribution within the river) is usually at or below 1 % during spring and early the time of year mature glochidia are present (Wiltz, 1981; see Table 5). survival estimates of entrained fishes to actual glochidia hosts (juveniles and adults not entrained due to 3/8-inch mesh screens) would further reduce these a.nd larv a e are directly c o rrelated tospedes abunda.nce the area, so commonly entrained fishes are also species common to the areaAlthough not addressed as a concern in the SALPA, the low impingement rate fish/day) from the 1980 study reinforces the minimal environmental effect of the Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service. Dated November 10. 2006 Page 2 EV-06-2576 Thermal discharge. Predictive models and field verification (Guill. 1980) confirm the Nuclear Regulatory Commission's conclusion 1 of the small size of the thermal plume even under conservative assumptions, and the lack of the possibility of thermal blockage in the Altamaha River from the plant discharge. During the 1980 drought, thermal plumes either did not exist, did not extend far enough downstream for . detection at a transect 200 feet from the discharge,or, under the mostextreme conditions (817/1980, period of lowest river flow and greatest discharge temperature), resulted in a river temperature rise of O.05°F. Therefore, conditions do not exist due to Plant Hatch that could promote "heat stress, algal blooms, and oxygen depletion;'. To the contrary, temperature monitoring during a drought year show that changes in temperature due to Plant Hatch rarely exceed 0.05 OF, and no algal blooms nor oxygen depletion have been recorded or reported. Dredging. As addressed in our October 2ih letter Plant Hatch has not expanded operations as stated in the SALPA. A pennit renewal and modification was obtained on September 7, 2005, increasing the allowable dredged volume from 35,000 to 44.424 cubic yardS. This increase is expected to reduce the frequency of dredging and make the area more amenable to natural flushing during high flow events (Law, 1998). The dredging footprint and adjacent areas are poor habitat for mussels with relatively steep banks, shifting sand bars, and higher currents .. Additionally, the dredging permit contains specific requirements, including those inserted by the US Fish & Wildlife Service during the permitting process and repeated in the SALPA, to ensure protection of aquatic species. Flows. The SALPA (see page 11) refers to changes in flows from dam operations at . Lakes Jackson and Sinclair. These statements are incorrect. The dams occur 250 and 143 miles, respectively, upstream of the Ocmulgee-Oconee confluence, which is approximately 14 miles upstream of Plant Hatch. Due to current liceriseconditionsand flow agreements there are no "drastic flow reductions or alterations" due to dam operations in known habitats of the Altamaha spinymussel in the Altamaha basin. To the contrary, flows from these dams are controlled to ensure downstream biological water demands especially during drought periods. lNUREG-0147, Final Environmental Statement for Edwin 1. Hatch Nuclear Plant Unit 2; Georgia Power Company; Docket Nos. 50-366, Atomic Energy Commission , March 1978. Enclosure to N L 1 SNC Letter to U. S. and Wildlife Service, Dated November 10, 2006 Although the decline in the Altamaha spinymussel is likely the result of cumulative effects, stqtements in the SALPA that Plant Hatch has a direct or indirect role in its decline are not by scientific information or data. Please ensure that the inaccurate statements contained in the SALPA are corrected. If you have questions or comments regarding Plant Hatch please contact Jessica Joyner at (205) 992-7693. J. M. Environmental Affairs JMG:ahf Enclosures cc: Ms. Sandra Tucker, FWS -Athens (w/o Attachments) Mr. Hamilton, FWS Region Four Director (w/o Attachments) . Mr. Brett Albanese, Georgia DNR Natural Heritage Program Enclosure to NL-13-1528 SNC Letter to U. Fish and Wildlife Dated November 10, 2006 Page 4 EV-06-2576 bee: R. D.Just T. D. Blalock B.C. Terry L. M. Stinson T. Moorer G.B. Weyman W. E. Duvall W. J. Candler D. H. Warren M. A. Abney B. K. Feimster C. P. Hardin Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 PLANT EDWIN I. HATCH 316(b) DEMONSTRATION ON THE ALTAMAHA RIVER IN APPLING COUNTY, GEORGIA POWER ENVIRONMENTAL AFFAIRS JOHN W. WILTZ, PRINCIPAL March, to NL-13-1528 SNC to U. S. and Wildlife Service, Dated November 10, 2006 ACKNOWLEDGMENTS I wish to acknowledge the Nichols for assistance in Power COlnpQlny and fish James A. Gardner for Part in the and Randy Ott for and Mike C. I A. Breece, Ben L. Maulsby. wish to acknowledge the biologists and in procuring and of. samples. i Enclosure to NL-13-1528 SNC to U. Fish and Wildlife November 10, 2006 TABLE OF CONTENTS 'Introduction Part I Entrainment Materials and Methods Part 1 Part 2 Part 3 summary Part II Impingement Materials and Methods Part 1 Part 2 Discussion summary References ii Enclosure to NL-13-1 SNC Letter to U. Fish and Wildlife Service, Dated November 10, 2006 UST OF TABLES Scientific And Common Names OfFish Collected Entrainment II Number of Individuals Collected For And Night, Totals For The Month, For And Percent Concentration Of Each 12 2. Mean And Of The Total For Each For Month Samples. 14 Average Monthly Densities For Each Family, The Estimated Number Found In The River In The Of The Plant, The Percentage Entrained, And the Estimated Number Entrained. .17 Altamaha River Average Monthly Plant Hatch River Pumping Data, And The River Entrained For Each Month For 1975,1976, and 1980.-19 Percent Composition Of Abundant Fish Taxa For 1974 1975,1976, 1979,And 1980. 20 Comparison of Monthly Entrainment Data For Each Taxa For 1915,1916, and 1980 For Plant Hatch. 21 And Numbers OfFish Collected In Monthly Surveys At Plant Edwin I. Hatch For 1980. 22 Species And Numbers OfFish Collected In Impingement Surveys At Plant Edwin I. Halch For 1975,1976,1977, 1979, and 1980. 23 iii Enclosure to NL-13-1528 SNC Letter to U. and Wildlife Service, Dated November 10, 2006 LIST OF FIGURBS 1. Plant Edwin I. Hatch Site. 24 lAo Plant Edwin I. Hatch Layout. 25 .2. Plant \..v'v......For Unit 2. Water And, Plant Service Wa.ter System 26 2A. Plant Edwin I. Hatch Intake'Structure. 27 3. Location Of The Entrainment Sampling Stations On The Altamaha River At Plant Edwin I. Hatch. 28 '4. Air Temperatures' For The Day And Night Entrainment !'In'r\1'.,\J On The Al t.a.maha River At Plant Edwin 1. HatCh 1980 September, .29 5. For The Altamaha River 1980 -September, 1980, Entra,inment Edwin 1. Hatch 30 6. Edwin 1. Concentrations For The Day And Night On The Altamaha River At Plant Hatch From February, 1980 -September, 1980. 31 7. pH Values For The Day And Night Entrainment Surveys On The Altamaha River At Plant Edwin I. Hatch From February, 1980 -September, 1980.' 32 8. Specific Conductance For The Day And Surveys On The Altamaha River At Plant From February, 1980 -September, 1980. 33 9. Altamaha River Cross Section And River Elevation 19.7 m. Velocity Profile For 34 10. Altamaha River Cross Section And Velocity Profile For River Elevation 21.5 m. 35 11. Impingement Basket At Plant Edwin I. Hatch. 36 12. Water Temperatures For The Altamaha River At The Of Each Impingement Survey At Plant Edwin I. From January. 1980 -December, 1980. 37 13. water Temperatures For The Altamaha River At The End Of Each Impingement At plant Edwin I. Hatch From January, 1980 -1980. 38 iv Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10 , 2006 LIST OF F1GURBS (Con't) 14. River Elevation For The Altamaha River At The Beginning Of Each Impingement Survey At Plant Edwin I. Hatch From January. 1980 -December. 1980. 39 15. River Elevation For The Altamaha River At Of Each Impingement Survey At Plant *Edwin From January. 1980 -December, 1980. The End I. Hatch 40 v Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Conclusions Fish egg and fish densities generally fluctuated directly with spawning intensity and inversely with river flow. Relative abundance of fish families varied during the five years of study. but the Catostomidae and Cyprinidae were the most abundant taxa each year. The density of most fish groups was greater in night samples than in similar day samples. Estimated entrainment of fish and fish eggs into the water has remained less than one percent of the total during five successive spawning periods with the exception of months of July. August. and September. 1980. The increase estimated percent entrained during these months was due to low river elevations resulting from the lack of The percent of river discharge entrained is dependent on the nulilber intake pumps operating and river discharge. An increase in discharge decreases the percent An increase in entrained fish eggs *and larvae is not apparent for 1980 compared to 1975 and 1976. The differences in numbers of fish eggs and larvae are due to differences in species abundance from year to year, spawning activity upstream from the plant. river discharge. and time of year. 7 Based on the five years of stud y. estimated entrainment at Plant Edwin I. Hatch does not constitute a significant reduction in the fish population. The hogchoker, Trinectes maculatus ,. was the most abundant and the only species collected consistently each year in the impingement sample. Because of the very* low mililber of fish impinged for the five years of study. an accurate correlation between river elevation and tbe number of fish impinged cannot be made. . The increased velocity at the bottom of the intake structure (caused by the intake pumps) may. to some degree. explain why the majority of the fish impinged were Trinectes maculatus. a bottom dweller. Low intake velocities and site location are probably the primary factors resulting in low numbers of impinged fish. The impingement data for the five years indicates that impingement losses at Plant Edwin T. Hatch are extremely low and that the plant does not create a significant environmental effect . . The results of this investigation ful*fill the requirements set forth in NPDES Permit No. GA-0004120, Part 1-B-3. vi to NL-1 528 SNC to U. and Wildlife Service, Dated November 10, 2006 by the National Pollution Discharge Elimination System (tlPDES). No. Ga .. 0004120, for Plant Hatch, a 316(b) demonstration was completed by Georgia Power The 316 (b) demonstration Was submitted to the GeorsiaProtection Division in June, , and approved in August, '],977. Plant Hatch, owned corporation (30.0\), Municipal Electric Dalton (2.2%), and Power Co'mp,any 17.7 kilometers (11 north The site is on the south bank of 1. The site, Figures 1 and lA, consists of acres). The area is characterized by The plant consists of two nuclear units. Unit 1 has a 810 while Unit .2 has a generating capacity 1 and 2 went into commercial operation on December 31. and September 5, 1979, respectively. A cool flow diagram for plant Hatch Unit 2 is in (Note: water for Unit 1 is to Unit intake water for the system furnished by the Altamaha . A single intake two service water pumps per unit are approx.irolste 1.5 m3/sec (22,550 gpm) of water normal also houses four residual heat removal water pumps. The pumps have a combined of 1.0 m3/sec (16.000 gpm) and operate when the reactor is shut down. two are used when the system is operating .52 the river. The intake structure is 45.7 meters (m) (ISO feet) , 18.3 m (60 feet) wide, and feet) above normal river The water entrance is m (27 feet) wide and extends 4.9 m feet) 10.1 m (33 feet) above normial water level. Large debris removed trash racks, while small debris is removed by vertical traveling a 9.Smm (3/S-inch mesh). Water through the intake screens is 57.9 em/sec (1.9 fpal at normal river and decreases at higher river flows. 1 Enclosure to NL-1 528 SNC Letter to U. and Wildlife Service, Dated November 10, 2006 PART I ENTRAINMENT stations (11 and 12) were used to collect the diel entrainment stations were located in front of the intake structure (Il) across the river (12) as presented in Figure 3. in February. 1980, and ended in September, 1980, with samples were collected using a Wildco No. 25 twin 0.5 m diameter plankton net a mesh size of .760 V. duration was determined the river velocity with a Digital Flowmeter, 2030 , with a calibrated curve, a time factor was obtained allowing for the of 500 cubic meters of water through the net. The volume the net was determined with the use of a

  • Model 2030 R2 flowmeter in the net. were preserved in a 10% formalin solution and taken to the Environmental Affairs Center in Decatur, for identification.

Physicochemical data were at the beginning the and at the end of the night sample. Dissolved oxygen concentration and water temperature were measured with a Yellow Springs Instrument meter, Model 57. conductance was measured with a Instrument Company meter, Model 33, and pH was measured with Research Ionalyzer, Model 399A. Densities for each fish taxa collected were calculated as follows. The number of individuals in each taxa was divided by the volume of river filtered during day and sampling to obtain the densities for The estimated for each month were obtained by averaging the for all taken during the month. Estimates of total numbers and the vicinity of the plant were obtained by densities by total monthly river discharge using near Baxley. The of river discharge was using total monthly and the total volume of each month. The estimated number of taxa entrained was multiplying densities by the number of individuals .in the plant by the percent of river discharge entrained. The effects of the Hatch river intake structure upon the Altamaha River were at river elevations 19.7 m (64.6 ft.) and estimated 21.5 m (70.6 ft.). (at river elevation 19.7 m) were measured in seven 26 m sections of river at 0.2, 0.6, and 0.8 of the depth in each section. 2 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Results ' Part 1 Biological A total of 25 fish eggs and 442 fish (includes 'larval juveniles and adults) were collected in the eight month study. Specimens were not collected in the February samples. Most specimens. 24 eggs and 380 fish. were collected at night. ' , The scientific and common names of the species collected are presented in Table 1. The family Cyprinidae (includes the cyprinids. Hybognathus nuchalis, Notropis chalybaeus. and NotI22j.-L petersoni were the most abundant with 128 fish comprising 29% of the total number of fish collected (Table 2). The next most abundant families were the Catostomidae with 101 fish (22.9\) and the Centrarchidae with 78 fish (17.6\). The least abundant family was the Soleidae with one fish (.2'). The family Clupeidae was represented by 48 fish (10.9%) of which , Alosa sapidissima comprised 10.4' (46 fish) . Eleven Alosa sapidissima eggs were collected (44' of the total number of eggs collected). , " The mean and range (in parenthesis) o'f total lengths for the species and the month in which they were collected are .presented in Table 3. Monthly densities for each family for the month they were collected, estimated number of fish eggs and fish entrained by ,the plant, the number found in the river in the vicinity of the plant. and the percent entrained are given for 1980 in Table 4. The highest estimated of fish entrained was for the family Centrarchidae at 4920.9 individuals June. This estimate assumes a homogenous dispersal of fish in the-water the actual number entrained will vary). The lowest estimates were for family Esocidae 'at 61.1 individuals in April. The month of September had highest percent entrainment of 3.52\ with the months of March and April lowest at .21\. ' Part 2 Physicochemical Air temperatures recorded during the study are presented in Figure 4. The highest temperature was for the day sample in August at 32.4 C, and the lowest was the night sample in February at 12.0 C. Water temperatures are presented in Figure 5. A high of 31.0 C was recorded for the night sample in August, and a low of 7.5 C for the night sample in February. Dissolved oxygen concentration was lowest for the night sample in February and the day sample in September with a measurement of 5.2 mg/l (Figure 6). The highest recorded was 9.1 mg/l for the day sample in February. Because of meter malfunction, air and water temperature and dissolved oxygen concentration were not taken in July. pH values are given in Figure 7. Values for pH were below 6 . 0 for the day and night samples in February and March and the night sample in April. The highest pH recorded was 6.7 for the June. July. and August pH values are not presented for September because of meter malfunction . Specific conductance is presented in Figure 8. The 3 Enclosure to NL-1 528 SNC Letter to U. S. and Wildlife Service, Dated November 10,2006 highest recorded was 138 microhms/cm for the sample in September, and the lowest was 35 microhms/cm for the night in March. Part 3 Hatch river pumping data for January, 1980, October, 1980, and river entrained for each month are in 5. In* Table 5 presents the monthly Altamaba Ri ver .. Percent river entrained was for the months of June through October . , 3.2, 3.5. and 2.9% *. The lowest percent entrained was occurring in March and measured in seven 26 m sections of the river and are and.10. At elevations 19.7 III and 21.S m, depths were 0.5 III and 1.4 m, It should be noted the is on the north bank. of the upper and lower layers section of the river nearest the Hatch intake indicated that 57' of the intake flow would be drawn from the upper layer, and 43% would be drawn from the lower layer. With one a maximum of 0.54 will be withdrawn from the River. represents 0.6% of the at river elevation of 19.7 m. With two pumps operating per unit, a maximum of 4.8% of the flow would be diverted. 4 Enclosure to NL-13-1 SN C Letter to U. Fish and Wildlife Service, Dated November 10,2006 The State of Georgia criteria for water quality control oxygen concentration, water temperature, and pH (Georgia Protection Division, 1974). Dissolved oxygen concentration for warm waters is a daily of S.O and no less than 4.0 were lowest, 5.2 , for the survey in February day survey in September. Water temperatures state are not to exceed 32.2 C (90.0 Fl. Temperatures did not this limit with the highest, 31.0 C, recorded for survey. range for the State of ia 6.0 to 8.5. Values were below 6.0 for survey in February and and the survey for February, March, . The lowest recorded was 5.6 for the survey in February and survey in March. S:tnce the samples were from our Bcharae and no industry is located upstream in of the plant, indicate a normal occurrence. The range for between 150 138 conductance for a diverse fish fauna in freshwater is microhms/cm. (Ellia et al. 1946). The highest recorded was the September night survey while the lowest was 35 . microhms/cm March night survey. Plant Hatch river data, the plant for , , and data for and 1976 assumes a constant The 1980 pumping data is actual records. The data in Table 5 shows that the of river discharge is dependent on the number of intake and river discharge. An in river discharge decreases . This is best for the months of June through 1980. a drought year for the state of Georgia. for the years 1974, collected weekly from 1974 through 6 the percent composition of differences in total number the in were in abundant for the the years 1975, 5 Enclosure to NL-13-1 SNC to U. S. Fish and Wildlife Service, Dated November 10, 2006 note in Table 6 is though the data are not , it does indicate a fluctuation in composition for each family from one to another. For some families, th1s is more pronounced, as in Catostomidae; while in the family Esocidae, the percent was very low. . Monthly entrainment data for each taxa for 1975, 1976, and 1980 are in Table 7. The 1975 and 1976 data represents entrainment estimates for Unit 1. The 1980 data represents entrainment for Unit 1 and Unit 2. With the addition of the Unit 2 intake an increase in fish and larvae entrainment is not be the case as by the data. An increase in entrained eggs and larvae is not apparent for 1980 compared to 19.75 arid 1976. The differences in numbers of fish eggs and larvae are due to differences in abundance from year to year, activity upstream from , river , and time Summary It was noted in the Edwin I. Hatch Nuclear Plant Annual Environmental Surveillance Report No.3, January 1. December 31. 1976, Power company, 1977) that densities of fish and fish eggs seasons in 1974, 1975. and 1976 generally fluctuated spawning intensity and with river flow. The same conditions occurred in the 1979 and 19BO . Relative abundance of fish families varied the five years of study, but the Catostomidae and the most taxa each the total . The samples than in Estimated of fish and fish eggs into Plant Edwin I. Hatch has remained .less than one percent of the total during five successive periods with the exception the months of July, , and , 1980. The increase in estimated percent was due to low river elevations resulting from the lack of rainfall. Based on five years of estimated entrainment at the does not constitute a . reduction in the fish 6 Enclosure to NL-13-1528 SNC Letter to U. Fish and Wildlife ....en"',..'" Dated November 10, 2006 PART II IMPINGEMENT one sampling station located in the intake structure was used to collect impingement samples The study began in January, 1980, and ended in December, 1980, with taken Samples were collected a wire basket with a 3/8 inch mesh into the screen 11). Each sample '24 hours 'with the of the and July surveys. 48 hours. in a lot solution and taken Environmental Center in Decatur, Georgia, be identified, weighted, and 7 Enclosure to NL-13-1 SNC Letter to U. S. Fish and Wildlife Service, 1\1"""",.,."1-\",,,. 10, 2006 Part representing six identified to the Part 2 taken at the beginning and erid of each are 12 and 13. The highest temperature was 15 and 17, 1980; while the lowest was 8.9 I) C on 16, 1980. River elevations are in Figures 14 and 15. The , 81.9 feet, was recorded on March 19, 1980; while the lowest, 63.7 feet, was recorded 16 and 17, 1980. Data 14-15 are from computation of gage for the 1980 at station 02225000 U.S. Data for November and December were not available of this report. B Enclosure to NL-13-1 SNC Letter to U. Fish and Wildlife Service, Dated November 10, 2006 Five years, 1975, 1976, 1977, 1979, and 1980, of samples were collected at Plant Edwin I. Hatch. A total of (Table 9) 22 species were collected. The highest number impinged, 61 fish, was while the lowest, 14 fish, was in 1980. The data indicates low nnernen estimates per and year. The 1975 are 1.2 fish per 438 year; are .4 fish per day and 146 per ear; are 1.1 and 401.5 year; 1979 estimates are 1.3 fish per day and 474.5 1980 are 1.2 fish per day and 438 per year. The hogchoker, the most abundant and the only collected species were collected only once the five years. factors affecting impingement are: and seasonal movements to deeper with breeding behavior. Other losses are: river elevation, intake velocities, and site river levels resulted in a reduction in. intake velocities. In addition, of water in the intake structure increases from the surface to bottom to the.intake An accurate correlation between elevation and the fish for the five years cannot be because of the impinged. The increase in velocity the bottom of the to some why of the fish dweller. The is would not harbor game species. Low intake velocities and site factors resulting in low numbers of impinged fish. SUTnmaX:X The data for the losses Plant I. Hatch are does not create a 9 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Ellis, M. M., B. A. Westfall, and M. D. Ellis. 1946. Determination of water quality. U.S. Department of Interior, Fish and Wildlife Service 9. 122 pp. Georgia Environmental Protection Division. 1974. Pages 701-731 in Rules and regulations for water quality control, chapter 291-3-6, revised June, 1974. Georgia 'Department ofNatuml Resources, Atlanta, Georgia. Power Company. 1974. Edwin I. Hatch Nuclear Plant -Unit No.1, semiannual environmental surVCl1l811ce report No. ], period December 31, 1974. Georgia Power Company, Atlanta, Georgia Power Company. 1975. Edwin 1. Hatch Nuclear Plant -1, annual environmental y<;;..."'"...... report No.2, January 1 -December 31, 1975. Georgia Power ComPany, Atlanta, Georgia. Georgia Power Company. 1976. Edwin I. Hatch Nuclear Plant, annual environnlental surveillance report No.3, January I -December 31,1976. Power Company, Atlanta, Georgia. Georgia Power Company. 1977. Edwin I. Hatch Nuclear Plant, annual environmental surveillance for calendar year 1977. Power Company, Atlanta, '-J'l!IJ' Georgia Power Company. 1979. I. Hatch Nuclear Plant, annual envlronmental surveillance report-for calendar year 1979. Georgia Power Company, Atlanta, Georgia. 10 Enclosure to NL-1 SNC to U. Fish and Wildlife Service, Dated November 10,2006 Table 1'. Scientific and common names of species of fish collected during the entrainment study. scientific Name Alo.... aeetivalia Aloes, sepidlssima Dorosoma spp. Clupeldae Esoll: spp. ..mericllnuB nuchaliB Perea flav,es.:e"s Percidae Trineetas msculatuB Unknown egg Unknown larvae Common Name Blueback herring American shad Shad Rerring and shad Pickerel Redfin pickerel minnow' shiner coastal shiner Minnow Highfin

    • r Spotted Silver redhorse Snail bU.Ulleli(l Brown .DUJ.J..,eal('

Channel Broole:, R" v....,n,,,. Atlantic needletieh sunfillh Redbreaet Bunfish Largemouth hallll Crappie , Yellow 11 Enclosure to NL-13-1528 to U. S. Fish and Wildlife "'.:>nll"':> Dated November 10, 2006 Tallie 2. s"",*. _offndMduall mIlfllll.d!lV1Il'Idniglll._1ilt !he monlh. far ""y ""d 0l\Il p."cent of"""" Ia"" 0l\Il """" flImlly. T_ Fob. .M..."" May Jun. July /lug. 1l0lll* ""of %01 Spedes Day Nlghl Il..,. Night Day NIgIII Day Nigh! Dey NIgIt Dey NIgh! Oay NIgh! Oil)' Nigh! Day NIgIt Fiah Egg C!opeidee 10.9 Aloe ".!Mitis 0 2 0.23 -Hl!IJ;tiIll!lml Egg 6 10 44 FI$h " I 2 28 2 II 34 IIMI 1 0 0.23 Dot!:!I!!mI "'" 0 0.23 &odd... U EmuI.iIz. 2 3 2 3 1,13 Esox_ 0 0.23 Cjiprinlda. 29 30 ! 30 7.01 0 0.23 8 0 10 2.26 CyprinIdae 26 II 22 5 & 80 llMS" 29 c.toslo<l1dd"" 1I 12 12 M 11 65 17.19" " 8 5.2 8 14 15 I 0.4512 to 3-1 to U. Fish and Dated November 1 D, 1-IcI;!lIM I!tlI!!tt<u 12 f) tytaIuJyp nfl:ubtlJ.f 5 1 2 IcI;I/IIM !!!I!!CIIII!f 2 0 0 ApIltodoc!OIId

    • AplndpdsM' gy.vJUI 22 ...herlnld** I.IbI!1!!sIIw 3 0 lIololllda.

StR1ot;}'nbrJlGtttw CMlrBrt:hIol

    • 511 2 0 0 5 3 lIi-.. P<<qi tlsy!s:!M 2 .4 0 &hid.. '1 T_05"""""""'" Un_Egg e 6 Totals 0 12 Z1 22 ao 14 100 II 64 4 30 0 9S II 9 65 13 12 12 2 24 3 I!!I I 1 3 0 12 6 403 M 271 3.17 US 0.23 5.119 US O.M O.M 0.l1li 0.68 17.6 15.:18 0.23 11.23 1.111 2.11 2.49 0.45 0.23 0.23 56 1.36 1.4 100 100 100.2&

... .... .8 Enclosure to NL-13-1528 to U. Fish Dated November 10, Table J. Mean and oflb.e Total (mm) for Each Each Month Were Feb, March April June July Alosa 4.9 Alosa sapidissima 6.6 . 10.2 11.9 Dorosoma 3.5 4.6 Esox spp. 11.2 (11.2-21.0) Esox americanus 45.0 nuchalis 19.5 (is.0-2! Notropis 37.0 petersoni 10.5 15.5 (IS.O-Cyprinidae 8.6 19.3 5.1 4.8 5.0 6.6 (3.9-15.0) . (7.1-24.0) (3.9-5.3) (4.9-5.2) velifer 1.5 6.4 6.6 5.9 6.4 7.3 (6.1-8.0) 11.2 IU (8.1-15.0) 15 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Tabid. (Con\) Species Feb. March April May Iune Iuly Aug. Sept. Moxostoma anisurum 23.5 (21.0-26.0) Ictalurus brunneus Ictalums nebulosus 19.5 (17.0-21.0) 19.6 (17.0-25:0) 16.1 (15;0-17.0) Ictalurus punctatus Noturus gyrinus 13.0 24.0 (18.0-30.0) Aphredoderus sayanus S.1 (3.5-27.0), 33.0 Labidesthes sicculus 4.7 (4.2-4.9) Strongylura marina 17.0 15.5 (13.0-IS.0) Lepomis spp. 5.3 7.3 9.6 (5.2-13.4) -13.0 6.9 (4.2-8'.3) 15.0 Lepomis auritus 27.0 Micropterus salmoides 6.3 Pomoxis spp. 4.2 (3.8-5-3) 16 to NL-1 528 Letter to November 10, 2006 Table 3. (Con't) Species Feb. Ma.rch April May June July Aug. sept. Perea flavescens 7.1 6.1 '1.4 5.9 (6.9-7-3) (5.6-7.0) (6.7-8.8) Percidae 6.2 Trinectes maculatus 76.0 Unknown Fish Not measured because all these were o.amageo. 17 Enclosure to NL-13-1 SNC Letter to U. Fish and n".:>rnh.:>r 1 0, Table 4. MontnlY Densities for Each Estimated Number Found in the River in the Vicinity of the the Percent of River Discharge and the Estimated Number Entrained for 1980. Estimated Number Estimated Number Fish Monthly Densities of Eggs " Fish Percent of of Eggs & by the Per 1000 m3 in the Vicinity RiVer Discharge Entrained Month Month Family of Water of the Plant Entrained PlantEach February March NOSP" Clupe:\.dae NOSP 0.9 1.0 0.7 NOSP 84,609 94,010 65,807 0.5 0.2 NOSP 177 197 138 3.3 313,053 657 April Percidae Unknown egg TOTAL Clupeidae 4.1 0.6 1.5 12.1 1.8 381,680 53,116 075 1, ,350 173,628 0.2 801 112 294 2,376 365 2.0 192,910 405 0.3 28,938 61 7.9 762,034 1,600 Centrarchidae 1.8 6.6 0.6 752,388 . 636,636 57,876 1,590 1,337 122 percidae 1 .. 8 173,628 365 Unknown egg 0.6 57,876 122 May TOTAL Clupeidae 29.4 10.5 2,835,914 286,330 0.8 5,955 2,293 13.0 354.516 2,836 2.6 70,903 567 Ictaluridae 3.5 95,447 764 0.3 8.i81 65 0.3 8,181 65 Centrarchidae 0.3 8.191 65 18 Enclosure to 3-1 Letter to U. S. Fish November 10, Table 4. (Con't) Number Monthly Densities Month May (Con't) June July August September .Indicates No Family Percidae Unknown egg Unknown TOTAL Clupeidae lctaluridae Belonidae centrarchidae Adult Ictaluridae Centrarchidae Unknown TOTAL Unknown TOTAL centrarchidae percidae TOTAL Found Per 1000 m3 of Water 1.0 1.1 1.1 34.3 1.8 12.3 S.O 1.8 0.4 1.3 0.9 3.8 0.5 27.8 2.1 3.6 2.1 0.4 0.4 8.6 11.5 20.S 0.3 32.6 2.9 0.6 0.6 0.6 4.7 Estimated lJumh",.,.. of Eggs " Fish in the Vicinity of the Plant 21,210 46,356 29,998 935,662 45,086 308,088 125,239 45,086 10,019 32,562 22,543 95,182 12,524 696,328 31,060 53.246 31.060 5,916 5,916 127,198 85,847 155,271 *2, 243, 17,493 3,619 3,619 3,619 28,350 19 Percent of River Discharge Entrained 0.8 1.0 1.5 3.2 3.5 Estimated of Eggs & Fish Entrained by the Plant Each Month 218 311 240 1,485 437 2,988 1,215 437 91 316 219 923 121 6,754 478 820 478 91 91 1,959 2121 4,922 74 7,718 616 127 127 127 99B Enclosure to 528 to Fish and sClr",...'c Dated 10, Table 5. A1tamah River Monthl e, Plant Hatch River PUmping Data, and the percent river flow entrained for each month for 1975. 1916, and 1980. Year 1916 Altamaha Percent of lOuml'linn River ni.'........,,. Inllmninn River Discharge I Entrained Entrained 9,433 0.4% 10,461 0.3% 13,558 0.3% 8.450 0.4% 10,810 0.3% 9.375 0.4% 5.450 0.7% 20 Enclosure to NL-13-1528 SNC to U. Fish and Wildlife Service, November 10, 2006 Table 6 Percent of Fish Taxa for 1974, 1975, 1976, 1979, and 1980 Percent Family lJilli 1979 Aphredodelidae 2.1 2.98 1.11 Atherinldae* . Belonidae 0.7 Catostomidae 61.75 12.38 56.18 17.8 22.9 Centrarchidae 5.27 21.85 14.46 23.2 17.6 Clupeidae 5.23 2.39 2.54 1.3 10.9 Cyprinidae 13.66 37.21 18.65 48.4 29 Esocidae 1.33 0.53 0.11 0.7 1.4 Ictaluridae 0.16 11.57 . 0.29 2.7 6.6 Percldae B.38 4.21 4.44 6 2.9 Soleldae 0.2 Other Taxa 0.12 1.05 Unidentified Total Fish Collected 2.562 1.712 2.793 . 151 Eggs 51.16 52.71 86.16 44 Other Taxa Total Collected 258 258 1,033 21 --to U. and Wildlife November 10, 2006 Enclosure to NL-13-1528 SNC Table 7. of Monthly Entrainment 'Data for each Taxa for 1975, 1976, and 1980 for Plant Hatch Larvae Clupeldae Catostomidae Centrarchidae .!ill 1976 1980 February 0 7 0 0 0 0 11 0 0 March 0 88 176 1978 580 0 216 562 405 April 1 492 374 2860 6987 1582 82 362 123 May 31 47 2277 1342 1443 559 1426 346 65 June 202 0 426 140 109 1205 4153 219 932 July 0 O* 589 823-667 80 0" 0" ,4911 ....September'" O* -122 .. -122 "Sampling was discontinued after the June survey in 1975 "'Sampling was discontinued after the July survey In 1976 Cyprinidae Other Total Larvae 1975 1976 1980 1975 1976 1980 1975 1976 1980 Month February 433 0 0 60 0 0 504 7 0 March 5420 128 664 1422 228 259 9036 1585 1504 Apnl 1289 2445 1600 2775 810 1753 7022 11095 5432 May 455 346 2837 1019 248 1366 4273 2429 7104 June 258 749 2978 1206 52 1122 5959 1129 6663 ..July 185 479 .. 18 159 .. 1958 15412714 .. 7703'78 * .... 609* 122* "'* 975 Egg Total Clupeidae other Month' 1975 1976 1980 1975 1976 1980 1975 1976 1980 February 34 271 0 49 13 0 83 284 0 March 93 1258 199 137 228 297 230 1486 496 April ,38 1518 408 201 358 122 239 1876 530 May 351 1018 0 438 66 370 789 1083 390 June 11 0 0 0 0 0 , 11 0 0 July .. 0 O* 12 0 12 0 .. ....August O* 0 0 -.. ....September" "Sampling was discontinued after the June survey in ""Sampling was discontinued after the July survey In 22 Enclosure to NL-13-1 SNC Letter to U. Fish and Wildlife Service, Dated November 10, 2006 and Numbers of Fish Collected in Monthly Surveys at Plant Edwin I. Hatch for 1.980. Date ",,,,**a':JLt",.. Collected* Length (mm) 1.-1.5-80 2-15-80 NOSP 3-18-80 Trinectes maculatus (6) 61 63 65 54 61 61 (1) 43 4-15-80 (1) 816 5:'10-80 115 107 1.07 6-17-80 NOSP 7-15-80 Ictalurus (1) "'p'OlCJ,me'D Damaged Lepomis (ll 55 8-19-80 Ictalurus punctatus (1) 203 9-16-80 NOSP 10-14-80 NOSP 11-12-80 NOSP 12-17-80 NOSP *Number Collected in Parenthesis

    • Indicates No Species Collected weight. (grams) 5.0 5.7 6.0 3.3 4.9 5.0 .8 11.3 17.0 15.5 14.0 2.7 84.3 23 to 3-1 to u. and Wildlife 10, Table 9. I. Hatch for Amia nuchalia callisema.

hudson ius Notronis spp. ictalurus Ictalurua Ictalurus sayanus Acantharchus Centrarchus macropterus Lepomis auritus punct:at: Pomoxis n1gromacuiacus Perc ina Trinectes maculatus Totals and Numbers of Fish Collected 1976, 1977, 1979, and Common Name 1975 1976 Bowfin minnow 1 shiner shiner Snail bullhead bullhead bullhead. Channel catfish 1 1 Pirate Mud :2 Flier 3 Redbreast sunfish 1 1 Warmouth sunfish 1 at Totals Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10 , 2006 "'l ..... 11 co 'tI ..... " III::s rf to:! ..... ::s H :x: III rf () tJ" rn .... rf !II "-l C7\ .*.. . -_.---....* , . I I I 1 : t ..lAo Plant Edwin I Hatch Plant Layout N L() 27 00 Enclosure to 528 to U. Fish and 10, <l' ! "-l co COOLDIG .flATtK AND PLANT SERVICE SYS!!'H FOil UNIT 2 FIGIllUi: 2 ci..... co N!(), ('I') ."..,-'z .9 ::l o (f) U c:: LU SOUTH llANK NORTH lIANlI: ..: I S It n It 12 I GIORGIA. POW'1l COMPANY LOCATION OF STAl'lONS ON 28 29 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 ..... S 24 ! 22 I ,I 00Z , 18 13 18 16 20 F Ii A M J DAY NIGHT .. \411.. * --...,

  • METER MALFUNCTION 14 11 J A GEORGIA POWER COMPANY AUt TEMPERATURES FOR THE DAY AND ENTRAINMENT SURVEYS <:IN THE ALTAMAHA AT PLANT EWIN I. HATCH n.OM PEllRUARY. SEPTEMBER. FIGURE Enclosure NL-13-1 SNC to U. Fish and Wildlife Service, Dated November 10, 2006 DAY NIGHT . '-' '" ! )C 13 18 16 20 17 *14 11 'F M A M J J A S MONTH GEORGIA POWER COMPANY RATER n::HPElIATlJ!!.ES Rill. TIlE DAY JiXl) tUGBT ENTRAIl'IMENT SURVEYS ON TIm Al.:rAMAHA Rl:VE:R AT PLANT EDWIN I. BATCH FROM FE1IJttlAllY. SEPTEMBER, 1980 I l'I GU1U!: 301L-______________________

to NL-13-1528 SNC to and Wildlife Service, November 10, 2006 10 ,.......-9 ... .!!. m 8 Q 7 a 6'" .... JQ 5 ..""......-.... 13 F 18 M I 16 A I 20 :If 17 J MONTH 31 DAY lUGBT ___

  • Ml!:TER MALFUNCTION lit >\ , P lit II 17 .J A s GEORGIA POWE R COMPANY DISSOLVED OXYGEN CONCENTRATIONS FOR DAY AND NIGHT ENTRAINMEl'lT SURVEYS ON ALTAlWIA RIVER AT PLANT ED1J1N 1. FROM FEBRUARY.

1980 -SEP'l'EHBn, llGll'RE 6 32 Enclosure NL-1 528 SNC Letter to U. and Wildlife Service, November 10, 2006 DAY NIGHT 13 18 16 20 17 14 11 17 F M A M J J< A S COMPANY FlGtlJl.E 7 32 33 Enclosure to NL-13-1528 SNC Letter to U. Fish and Wildlife Service, Dated November 10, 2006 13 18 16 20 17 14 11 17 F If A H J J A S GEORGIA POWER COMPANX SPECIFIC CONDUCTANCE FOR Tl;IE DAY AND NIGlIT ENTIlAINKENT SURVEYS OR nm Al:rAHABA nVEa AT PLANT I!.llWIN I. BATca noM FlmRtJAllY. 1980 -5EPTEMlIEll. 1980 . FIGURE 8 13 34 to NL-13-1528 to U. S. Fish and Dated 10, .. ..I< .. ! .c w ... U1 .!'" South hnk IIorth Bank Illtake .j .6 .4 .3 .S .4 .S .S .5 .9 1.2 1.5 1.8 ALTAKIUIA RlVl!.R SECTION AND vnocnT . PlOrILE FOR 1tIVD. 'ELEVATION 19.' lSI. l'IGllRE '!I to NL-13-1 to U. and Dated 10, 2006 South Horth Bank Bank r-26111 Int.1ce .S ,6 .6 .6 .6 2.1 .S .6.4-.4 1.4 .6...... .,....... 2.1 <II \II"" .!..: l.O W ... 0'\ i 3.4 3.1 GIORGIA POWI. COMPANY "I.T.MU... RIVER ClOSS S&CtION AND VELOCITY FOR RIVE! ELEVATION 21.S III. FlGllUl 10 0 .... .... ... :z § u t: .§ II'< ..... § c '" 6 ..... Q) .0 E T -*... 1 I t!) i!I .. Q) >0 tl... Z 1lQ m l! G ai u .Q) (j) 1;:... i § to) co....... tl... li! M to) -0 c ro T W .lI" ....... ::J 0-1 co N 1.0 36 37 Enclosure to NL-13-1 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 30 29 28 27 26 25 24 23 22 u.....,. 21 S 20 19 M 18 17 16 15 14 13 12 11 10 !I 8 7 6 J F M A M J J A SON D

  • MONTH GEORGIA POWER COMPANY loIATER TEMPERATURES FOR l'RE Al.TAMAJIA R1.VER AT THE lIEGINNING OF EACH lHP1NGl!XENT S\JR'\i'EY AT PLAN'l' ED'II'IN 1. BATCH noM JAmJAllY.

1980 -DECE:I'lBER. 1980 37 38 Enclosure to NL-1 528 SNC Letter to U. Fish and Wildlife Service, Dated November 10, 2006 ,..,. 0:.,:)...., a !:i ::.: Ii J F M A M J J A S I) N D GEORGIA POWER COMPANY WATERTl** FeR THE ALTAHABA Rl.VER AT THE END OF lHPllIliEMENT SURVEY AT. PLANT :Et1InN I. BATca: FROM JA'NUBY. 1980 DECEXllER*.1980 _________________________________FIGURE Enclosure to NL-13-1 SNC Letter to U. Fish and Wildlife Service, November 10, 2006 82 In 80 79 78 71 ,.... 76 75 "" ..... 74 IZ: 0 .... 73 i:1 72 71 e 70 :;l 69 68 67 66 6S 64 63 J P M A M J J A SON D MONTH POWER COMPANJ RIVER ELEVATION

FOR TIlE ALTAMABA RIVEI AT TIlE BEGINNING OJ' EACiI llIPINGDIEN'r SURV1!Y AT PLANT EDWIN t. BATCH FROM JANilARY.

1980 -DECEMBElI.. 1980 'PlCURE 14 39 40* Enclosure to NL-13-1 SNC Letter to U. Fish and Wildlife Service, Dated November 10,2006 ti e""' :0: fa .... sa .... '" 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 J P HAM J J A S (I N D GEORGIA POWER. COMPANY lUVER ELEVATION FOR nm ALTAMAHA RIVER* AT !.ND OF l:ACB lHPINGEMENTStrRVEY AT PLiI.NT EIJI'vIIN I. 'IIA'l'CB FROM JANtlARY. 1980 -DECEMlln. 1980 40 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 PLANT EDWIN l. HATCH UNITS 1 AND 2 THERMAL PLUME MODEL VERIFICATION GEORGIA POWER COMPANY ENVIRONMENTAL AFFAIRS CENTER M. C. NICHOLS AND S. D. HOLDBR MARCH, 1981 Enclosure to NL-1 528 SNC to U. S. and Wildlife Service, November 10, 2006 TABLE OF conclusions Introduction Materials and Results References OCR RelJl:odu(:t Enclosure to NL-1 528 SNC Letter to U. and Wildlife Service, Dated November 10,2006 LIST OF TABLES L. Batch Nuclear Plant NPDES Temperature Monitoring During 1980. 7 2. Edwin 1. Hatch Nuclear Plant Plume Surveys. 9 3. . of Observed Plume Areas with Tbose Predicted Dimensional Buoyant Plume and Surface Carter Three 10 OCR Reproduction ll/22/99 Enclosure to NL-13-1528 SNC to U. Fish and Wildlife Service, LIST OF FIGURES 1. Plant Water and Plant Service Water 11 2. River Discharge Structure and Mixing Box. 12 3. Altamaha River Thermal Plum6 Transects. 13 4. Altamaha River Thermal Plume Survey for June 19,1980 (9:25) . 14 S. Altamaha River Thermal Plume Survey for August 1980 (9:30). 6. Altamaha River Thermal Plume Survey for August 1980 (17:30). 7. Altamaha River Thermal Plume Survey for August 1980 (16: 10)

  • 8. Altamaha River Thermal Plume Survey for August 1980 (12: 02). November 10, 2006 OCR Reproduction 11/22/99 iii Enclosure to NL-13-1 SNC Letter to U. Fish Wildlife Dated November 10, 2006 During 1980, water temperatures in the mixing zone were within the limits the NPDES (90 OF maximum or 5 DF rise above ambient river of observed plumes with predictions of the Carter buoyant plume model demonstrates that this model is a reasonable approximation of the Edwin I. Batch Nuclear Plant' thermal plume. 3. The results of this investigation fulfill the requirements set forth in NPDES Permit No. GA-0004120, Part I, 8-4. OCR Reproduction Uj22/99 iv Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Introduction Water temperatures were measured at Plant Hatch on a weekly basis as required by the National pollution Discharge Elimination System (NPDES) Permit No. GA-0004120.

In addition, a study to verify the thennal plwne predictive model for two-unit operation was completed. . Plant Hatch, owned jointly by Oglethorpe Power Corporation (30.0%), Municipal Electric Authority Georgia (17.7%), City of Dalton (2.2%), and Georgia Power Company (50.1 %) is located approximately 11 miles north of Baxley in Appling County, Georgia. The site is 'on the south bank of the Altamaba River, east of U.S. Highway 1. The plant consists of two nuclear units. Unit 1 has a generating capacity* of 810 megawatts, while Unit 2 has a generating capacity of 820 megawatts. Unit 1 and 2 went into commercial operation on December 3], ]975, and September 5,1979, respectively .. A cooling water flow diagriun for Plant Hatch, Unit 2 is presented in Figure 1. The cooling water syStem for Unit 1 is identical to the system for Unit 2. The mixing box for the rivet discharge structure (Figure 2) receives cooling tower blowdown, demineralizer waste, cooling tower overflow, and excess service water from both Unit 1 and Unit 2. From the mixing box, two 42-inch lines ron down to the river and extend approximately 120 feet out from shore. The point discharge is approximately 1,260 feet down river from the intake structure and approximately 4 feet below the surface when the river is at its lowest level. OCR reproduction 11/22/99 1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 In accordance with the NPDES permit, were measured on a weekly basis at the structure or at a point upstream of the intake, at the mixing chamber, and at the downstream edge of the mixing zone (approximately 500 feet downstream of the discharge point). A listing of the temperatures is given in Table 1. The maximum observed between intake and mixing zone temperatures was 3.2 of, which occurred during one sampling All temperatures measured are within the limite required by the NPDES (90 of maximum or 5 of rise above ambient). The NPDES permit also requires ape to field and/or fine tune the thermal plume model beginning not than six months after commercial of Unit 2. Twelve thermal plume monitoring surveys were conducted ].980. each of the

  • temperature measurements were taken at of 1 ft., 35ft. All measurements were made from a moving along preselected in the river (Figure 3) using a probe and continuous recorder.

Monitoring equipment was calibrated in before each and rechecked in the field before and after .each survey. data in addition to the measurements, are listed in Table 2. No data were collected during weather. OCR relprexluct:i n/22/99 2 to NL-13-1 SNC Letter to U. S. and Wildlife _CnillI'C November 10, The temperature data collected for five of the twelve surveys are shoWn on' 4 8. These figures show the thermal exi on each of survey and the corresponding computer largest rise above ambient river temperatures was 1 . 5 1-foot transects taken on 6-19-80. This plume did not extend 250 feet downstream of the discharge. The maximum rise above ambient temperature on the 1-foot transects for the remaining surveys was 0.5 OF. The in water temperature for the 3-feet and 5-feet transects were 0.5 OF or les9 for all surveys. In addition to the five surveys shown in inconclusive data with only one cooling tower and 10-31-80). No thermal plumes were in .the river on three (6-18-80, 8-6-80, and 8-13-80). Model predictions suggest plumes which would not extend downstream. to be transects. The data from the , 16:15 EnST) shows the effects of solar . the barge During this survey. the ambient was 97 of. Because of water elevation, 64.7 feet, the areas near the sandbar were extreme solar radiation. Solar heating resulted in a secondary which was entrained into the downstream of the discharge secondary plume was evident as a in water temperature to 90.0 OF, approximately 800 feet below the discharge. The ambient water temperature and discharge were 88.S OF and 89.1 OF, . This secondary plume biased data collected, and no model predictions could be made. The preceding seven surveys are not presented in figures. OCR 11/22/99 3 Enclosure to NL 1 SNC Letterto U. Fish and Wildlife Service, Dated November 10, 2006 The results shown in the 1976 annual demonstrate that a suitable thermal plume model, the Carter thermal plume model, ,has been field tested and verified for one-unit operation (Carter et al .* 1973. Edinger et al .* 1974, and Georgia Power Company, 1977). As required by the NPDES

  • this model must also be verified for two-unit of observed and surface plumes for each of the 1980 in through 8. A dimensionless constant has the model order to obtain the best fit between observed dimensions.

The constant used for the 1980 thermal plume 4 to 40 with an average value of 18-9. This constant where dilution of excess heat and is affected by the volume. The largest value constant (C -40) lowest AT and the volume (0.9 OF and 98.0 . Lower discharge AT values required for the ,constant (ranging from 12 to 20). The lowest value of the constant (C = 4) occurred with a low discharge volume and an elevated AT (34.5 cfs and 4.5 0p, If the survey with the lowest AT and the highest discharge volume is the constants for the surveys range from 4 to 20. The overall dimensions of the observed and plumes are summarized for each survey in Table 3. The observed and lengths are tabulated to the nearest 50 feet, which is the accuracy to which the plumes could be' from the data. Table 3 shows a' reasonable comparison between the and predicted lengths, considering that excess temperature isotherms no greater than 1.5 OF could be identified from the field data. Similar results are shown for the surface areas. The higher surface areas of the observed plumes are to increased surface spreading caused by the sandbar. These results are within the to be expected from a simple model for low excess temperature The plume model verification was conducted under compiar'ab to average summer conditions. The estimated fully excess temperature for average summer conditions (average river of 3000 cfs and AT .. 4.7 OF) is 0.09 OF (Georgia Power 1975) . During the 19BO thermal plume , the period of lowest flow and tower heat ection occurred during the survey on 8 (Table 2). The river discharge on 8-7-80 was 0 3220 mixed excess temperature 17;30 EDST was 0.05 F with discharge of 34 cfs and of 4.5 of. This demonstrates that towers are operating as predicted. calibration of the Carter model to the 1980 field data for di.sc:halrqre from two units constants ranging from 4 to 20 with an average OCR 11/22/99 4 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 value of 13. Model predictions for a AT value less than 1°F and cooling tower discharge of 98 cts required a constant of 40 and is not considered typical of normal conditions. Results reported for Unit 1 operation during 1976 ' yielded constants ranging from Sto 16 with an average value of 10 (Georgia Power Company, 1977). These comparisons demonstrate that the Carter model is a reasonable approximation for the Hatch thermal plume. Thus, a suitable thermal plume model has been verified and calibrated with field surveys as required in the NPDES permit. OCR reproduction 11/22/99 5 Enclosure to 528 SNC to U. Fish and Wildlife Service, Dated November 10, References Carter, H. H., E. W. Schiemer, and R. Regier. 1973. -The surface to an ambient flow of various depths. Technical Bl. Bay Institute, Johns Hopkins University. Baltimore, . 64 Edinger, J. E. , D. K. Brady and J. C. 1974. Heat exchange and transport in the environment. Electric power Research Institute RE-49 Report No. 14. Palo Alto, Ca. 1975. Hatch Nuclear Plant Unit No.2 Environmental Stage. Volume 1, 5.1-2. Georgia Power Company, 1977. Edwin I. Hatch Nuclear Plant Annual Environmental Calendar Year 1976, Section 1.2. Georgia Power Company, Atlanta, Ga. OCR reproduction 11/22/99 6 to NL-13-1528 SNC to U. Fish and Wildlife Service, Dated November 10, 2006 TABLE 1. EDWIN I. HATCH NUCLEAR NPDESTEMPERATURE MONITOR!NG DURING Mixing Chamber Unit Unit II Intake Discharge Discharge 01/02/80 52.0 52.0 79.0 52.0 0.0 01/10/aO 48.0 71.0 75.0 48.0 0.0 01/16/aO 51. 0 71.0 79.0 51.0 0.0 01/23/80 52.0 71.0 75.0 52.0 0.0 01/30/80 50.0 67.0 52.0 50.0 0.0 02/07/80 44 .0 63.5 64.0 44.0 0.0 02/19/80 46.5 6S.0 72.0 46.S 0.0.02/20/80 48.0 66.0 58.0 48.0 0.0 02/28/80 51.5 74.0 76.0 51.5 0.0 03/05/S0 48.0 76.8 53.4 4S.0 0.0 03/12/80 54.0 75.0 58.0 54.0 0.0 03/19/S0 55.0 63.0 60.0 55.0 0.0 03/26/80 59.0 69.0 63.0 59.0 0.0 04/02/80 62.0 70.0 . 65.0 62.0 0.0 04/09/80 62.0 73.0 66.0 62.0 0.0 04/16/S0 64.0 67.0 64.0 64.0 0.0 04/25/80 66.0 80.0 70.0 66.0 0.0 04/30/S0 67.0 84.0 84.0' 67.0 0.0 05/07/S0 69.0 88.0 72.0 69.0 0.0 OS/14/S0 75.0 70.0 78.0 75.0 0.0 OS/22/80 77.0 9J..0 78.0 77.0 0.0 OS/28/S0 7S.0 06/05/80 76.0 78.0 76.0 0.0 06/13/80 79.3 79.0 78.0 79.3 0.0 06/18/S0 79.2 74.0 88.0 79.2 0.0 06/25/80 81.0 90.0 90.0 81.0 0.0 07/02/80 . 79.0 80.0 79.0 0.0 07/09/80 84.0 83.0 89.0 84.0 0.0 07/16/80 86.0 90.0 90.0 88.0 2.0 07/23/80 84.0 79.0 94.0 84.0 0.0 07/31/80 85.0 90.0 86.0 1.0 08/06/80 86.0 86.0, 82.0 86.0 0.0 08/13/80 85.0 78.0 88.0 85.0 0.0 08/20/80 85.0 95.0 90.0 85.0 0.0 90.0 86.0 09/03/80 84.2 93.2 92.3 84.2 0.0 09/10/S0 S1.0 89.0 76.0

1. O.09/17/S0 83.0 86.0 85.0 S4.0 1.0 09/24/80 82.0 92.0 92.0 83.0 1.0 10/01/80 70.2 S2.9 79.5 73.4 3.2 10/08/80 67.8 82.6 74 B 6S.4 0.6 10/1S/S0 66.0 67.0 79.0 66.0 0.0 10/22/S0 67.8 82.6 SO.2 6S.2 0.4 OCR reproduction 11/22/99 7 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 TABLE 1 (Can't. ) Mixing Chamber Date Intake Temp. (OF) Unit I Discharge Tenw. (OF) Unit II Discharge Temp. (OF) Mixing Zone Temp. (OF) b.T 10/29/80 11/05/80 11/12/80 ll/19/80 ll/26/80 12/03/80 12/10/80 12/17/80 12/23/80 62.8 62.4 58.5 57.0 54.5 53.6 55.4 51.3 48.4 82.6 73,-8 73.0 71.1 70.0 58.6 76.8 69.4 68.0 84.4 67.1 63.3 59.5 58.5 56.3 59.9 54.1 52.0 64.9 63.5 59.7 57.0 56.8 53.6 55.6 50.5 47.1 2.1 1.1 1.2 0.0 2.3 0.0 0.2 -0.8 -1.3 ""Monitor out of service for repairs. OCR reproduction 11/22/99 8 to NL-13-1528 to Fish and Dated November 10, TABLE 2. EDWIN I. HATCH NUCLEAR PLANT THERMAL PLUME SURVEYS Megawatts River River River Discharge Discharge Discharge River Thermal Elevation Velocity Volume Temperature Temperature Date (ft) (efs) (ft/a) (efs) (ft/s) (OF) (OF) 06-1S-S0 1 (14 :30) '(0 2421 66.2 4S70 1.40 71.3 3.71 87.1 83.0 06-19-S0 (9: 251 2010 2399 66.0 4720 1.25 75.7 3.98 88.3 91.3 08-06-S0' (15:10) 1731 2397 65.0 3220 1.64 64.6 3.36 S6.0 89.2 08-07-80 (9:30) 2061 2389 65.0 3220 1.31 98.0 5.09 8S.0 87.1 08-07-80 (17:30) 08-08-80' (10: 15) 2247 2348 2383 2320 65.0 .65.0 3220 3220 1.64 1. 64 34.5 35.6 1.79 3.71 93.9 1 93.9 89._4 86.9 08-11-80 (16:10) 2403 2400 64.7 2890 1.31 33.4 1.74 88.0 86.4 08-12-80 2415 2419 64.7 2890 1,48 32.3 1.68 89.1 87.4 (12:02) 08-12-80' 2405 2392 64.7 2890 1.31 36.8 1..91 89.1 88.5 (16:15) 08-13-80 1 150 2409 64.7 2890 1.31 70.8 3.68 88.0 87.1 (10:45) 10-30-80 3 1951 2380 64.6 2840 0.98 40.1 2.08 81.0 65.5 (14:00) 10-31-80 3 1903 2400 64.6 2840 0.98 39.0 2.03 74.5 '63 5 (10:10) I No plume detected.

2 Discharge temperature lesa than.river temperature. 3 Discharge from Unit I towers 4 Thermal plume affected by heating. OCR reproduction 11/22/99 9 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 TABLE COMPARISON OF OBSERVED PLUME LENGTHS AND SURFACE AREAS WITH THOSE PREDICTED BY THE CARTER TIIREE-DIMENSIONAL BOUY ANT PLUME MODEL Survey Contour Length (ft) Surface Area (ft 2 Constant (OF) Observed Predicted observed Predicted 06-19-80 17 1.0 400 400 6.7x 1041.0x 10' 0.5 125014.8 x 1041.4 x 10 4 08-07-80 40 0:5 300 300 2.4 x 104U.Sx 10' (9:30) 4 0:5 250 250 0.7 x 10 40.4 x 10' (17:30) 20 0.5 200 200 0.6 x 10 40.4 x 10' (16:10) Ii 0.3 250 250 1.0 x 1040.2x 10' (12:02) OCR reproduction 11/22/99 11 --Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 CY n:a 'i .g 'i 8.c: n rT.... o ::s _. f-' f-' I:: ,....,..... .......nllClllOll ...... ---. ...... \D GEQAQiA f'OW!R COMPANY\D . ","-nll AND PLANT "*' EDWIN l HIlTCH IIJCl£AA PUNT '2 SEAVICE WAT£R $VSTtN FIGURE 1 POOR QUAUTY ORIGINAL Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 " 0 fd t1 o rT g ... !/ N ...... () ...... ..... POORQUAUTY '" '" . ORIGINAL.......,.., GECRlIA POWER COMPANY EDWIN L HATCH NUCl.EAR PlANT UNIT 2 .,.."..., ...., ....0,

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"'I..UI'1I1: .'1"UII)'" r:II'III..TII'IIMI'II_ IIYIC'I'II' ....... T :lit ,lit ....... GEORGIA .I!!QWER CQMPANJ EI)l(II I. lATCH l'IUCLW rt.ART POOR QUAlITY ALTAlWIA ORIGINAL "I I II I ill!.... 2*.., ..... I \ N lID .. t '" II -'" Q t I-... ...-B I !1m ... Ii I.:> U ...0 ::J " II> '" i x l-"" ..... -j \ It g I; l-I . ..;1-, Em i B Ii fi I-0 Ill[ I...... I!m 0 II-i (J) i <Ii (.) I .. to (J) I: .. .... I 00 .... DO I ,. . .. . 1I !'" .... ...... CD... ,. I I-0 c m II D 0 I .r: t{) = l-u:: t, i 00 a J \,', d I * :=l > i , , I i 0 I ...... III Z II t++M .13"' 0 Z It oo + .. co N I,{)...., (V") 18 0 ...... (J) PCR reproduction 11/22/99 ,...... ::l 1B t{) 0 13 c W to SNC Letter to U. S. Fish and Wildlife <;':onll',..'" Dated November 10,2006 LAW LAiVGIBB Group FRESHWATER MUSSEL SURVEY ALTAMAHA RIVER APPLING AND TOOMBS Prepared for: GEORGIA POWER COMPANY Smyrna, December 2, 1998 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated l\Iovember 10,2006 FRESHWATER MUSSEL SURVEY ALTAMAHA RIVER APPLING AND TOOMBS COUNTIES, GEORGIA Prepared for: GEORGIA POWER COMPANY Prepared by: Law Engineering and Environmental Services, 112 TownPark Kennesaw, Georgia December LAW Project No. '_'_' .,. -_ _ ._ 0_._" _ _ _ Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 A/lamaiuJ River Mussel Survey December 2. 1998 LAW Projecl 12000-8-0178 TABLE OF CONTENTS UST OF TABLES ................................................................................................................................. I LIST OF FIGlJRES ...................... ........................................................................................................... 1. 0 INTRODUCTION ................................. ....................................

..................................
  • ......... I

1.1 BACKGROUND

............................................................... , ............................................... 1.2 PURPOSE ............................................................ ............................................................. I 2. 0 METHODS ............................................................................................................................. 3.0 RESULTS ............................................

.................................................................................. 3.1 SPECIES COMPOSmON AND RELATIVE ABUNDANCE

..................................... 3.2 ABUNDANCE ........................................................................................................ ......... .3.3 SPATIAL DISTRIBlJI10N ............................................................................................. I. 4.0

SUMMARY

............................................................................................................................ 5. 0 REFERENCES

..................................................

..................................................................... APPENDICES
  • A FIELD DATA RECORDS B ALTAMAHA RIVER FRESHWATER MUSSEL COLLECTIONS 1993 AND I -.

Enclos,ure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I Alramaha Rivtr Mussel Survey

2. 1998 LA W Pro}tcr 12(){)()..8-()

/78 usr OF TABLES Table Freshwater mussels potentially occurring in the Altamaha River near Plant Hatch Swnmary of freshwater mussels. collected from the Altamaha River near Plant Hatch, September 25-26, 1998 3 Relative abundance of mussels in the Altamaha River in the vicinity Plant Hatch, 1968, 1993 and 1998 Sumri:lary of freshwater rilUssels collected from the Altamaha River near Plant.Hatch, July 1993 5 Comparison of freshwater mussels collected from the Altamaha River upstream and downstream of U.S. Highway 1 bridge, September 25-26, 1998 6 Comparison of freshwater mussels collected from the Altamaha River upstream and downstream of U.S. Highway 1 bridge, July 13-15, 1993 7 Mussel sampling sites in the Altamaha River near Plant Hatch, Toombs and Appling Counties, Georgia, September 25-26, 1998 I I I I I I I I I iii --_._--_.-_.__ .-.. --.... Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I AitlJlrUlira Riwr MlISSlli SutWy December 2, J 998 LAWProject I lJSTOFF1GURES I Figure I* Site Location Map. 2 Sampling Location Map 3 Comparison of the CPE for six mussel species collected in 1993 and 1998 I 4 Spatial distribution of live mussels by river mile, September 25-26, 1998 I I I I I I II I I I I I iv ---.---------, Enclos , ure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 AltamaJra Rillrr Mussel December 2. 1998 LAW Project 12000-8-0178

1.0 INTRODUCTION

1.1 BACKGROUND

Law Engineering and Environmental Services, Inc. (LA W) conducted a freshwater mussel survey for Georgia Power Company to meet license renewal requirements for Plant Hatch. Plant Hatch is . operated by Southern Nuclear Operating Company (SNC) under a license issued by the NuClear Regulatory Commission (NRC). The NRC, under 10 CFR 51.53(c)(3)(ii)(E), requires that applicants assess the potential impact of continued operation of nuclear power plants to threatened ' or endangered species. Plant Hatch is 10catediUong the Altamaha River in Appling County, near Baxley, Georgia. This summarizes findings* of a September 25-26, 1998 survey tei record the occurrence, distribution and relative abundance of freshwater mussels in a l2-mile reach of the Altamaha River. 1.2 ' PURPOSE I The purpose of the survey was to establish the occurrence of freshwater mussels in the vicinity of I Plant Hatch that are classified by the U.S. Fish and Wildlife Service (USFWS) and/or the Georgia' Deparnnent of Natural Resources (GDNR) as endangered or threatened. Review of databases I* maintained by the GDNR (1996 version) and the USFWS (1997 version) indicated that mussel species with protected status (i.e., State or Federal endangered or threatened) are not known to occur I in the vicinity of Plant Hatch. Six freshwater mussel species were listed in the GDNR and USFWS databases for the study area in Appling and Toombs counties (Table I). Three species, Alasimidonla I arcula (Altamaha arc-mussel), Elliptio shepardiana (Altamaha lance), and Elliptio spinosa (Georgia spiny mussel), are listed as "Species ofConcem", a category that replaces the C2candidate category I for species that are being evaluated by the USFWS to determine populations trends and threats. I The USFWS database included three additional mussel species that are endemic to the Altamaha River system, but do not have protected status. Those species are Elliptio dariensis (Georgia I I I-I .... . ...... Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 AltafMlw River Mussel Survey December 2. J998 LAW Project 12000-8-0J78 elephant-ear), Elliptio hopetonensis (Altamaha slabshell) and LampsiliS dolabraejormiS (Altamaha pocketbook). The "global" and state ranks for each of the six species are given in Table 1. These ranks indicate the relative rnrity of species based on occurrence records. The lower the rank, the fewer the reported Occurrences. The six mussel species listed above hay-e State and global ranks that range from critically imperiled (SIIG 1) for E. spinosa to rare or uncommon (S3/G3) for E. hopetonensis and E. dariensis. I 1-2 -,---'----------- Enclos,ure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I AJlanuziIa Riwr MlISSel Sllrwy December 2. J998 LA WProject J 2()()()..8-OJ 78 2.0 MEmODS t I A field survey for freshwater mussels was conducted September 25-26, 1998 over an approximate 12-mile reach of the Altamaha River from river mile (RM) 122.0 upstream of Plant Hatch downstream to RM 110.0 (Figures 2a and 2b). Plant Hatch is located at RM 116. Sampling effort . targeted mussel habitats and areas where mussels have !:>een collected in the past. A total of 23 sites were sampled including sites sampled in 1968 by Sickel (1969) and sites sampled in July I 1993 by Dr. Eugene Keferl, of Coastal Georgia Community College, Brunswick, Georgia (Appendix B). Dr. Keferl served as a consultant for the September 1998 mussel survey and participated in the field survey. I I Few new sites were surveyed because moderate water levels prevented sampling some steep banks and submerged sand bars. River stage increased slightly from 5.15 to 5.23 feet during the survey based on provisional data from the U.S. Geological Survey (USGS) gage at Baxley (No. , 02225000). Water levels during the 1998 survey were approximately 1.5 feet higher than were recorded during the July 1993 survey and were over four feet higher than water levels recorded for the August 1968 survey (Sickel, 1969).I Mussels were located by hand picking and raking. Sampled habitats included the head and tailend I of sand bars; backwaters at the downstream end of sand bars; shaded banks; steep banks downstream .of sloughs; mouths of sloughs and swamps; ponded areas at the tailend of sand bars; : along stable banks with root wads; and along sandy shorelines. Notes regarding channel/bank conditions, substrate type, water depth and relative current conditions were recorded on Field DataRecord forms (Appendix A).. I Sampling effort was recorded as total search time in hours to allow reporting of relative mussel abundance as the number collected per unit of effort (CPE reported as the number of mussels I collected per hour). Four crew members participated in the surveys conducted September 25, 1998 and three crew members participated September 26, 1998. Search time ranged from 0.75 hours to two hours per location and totaled approximately 29 hours for the two-day survey. 2-1 ..--' ...-.. Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Altamana RiveI' Mussel Surwy December 2. JLA. W Project J:z()()()..8.()J Mussels were collected, identified., and counted in the field and released at each colJection site. Mussel specimens were classified as alive or as shells (nacre with some luster and perio'stracum intact). Few subfossil (lusterless or chalky nacre and peeling periostracum) shells were observed, so dead shells were not differentiated into recently dead and subfossil categories. r ' .. --------_ . I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Altamalla River MusselSurvey December 2. 1998 LA W Project /1000-8-0178 3.0 RESULTS 3.1 SPECIES COMPOSmON AND RELATIVE ABUNDANCE The September 1998 survey yielded 1336.5 mussels (alive and shells) representing 12 species (Table 2). The collections included the six species listed in the GDNR and USFWS databases (Table 1) and six other species that are

  • known to occur in the Altamaha River system* (Johnson, 1970). The collections were dominated by
  • E. hopelonensls (29.2 % of the total collection), E. iclerina (17.5 %), Lampsi/is splendida (16.2 %), E. darienris (14.3 %) L dolabraeformis (11.4 %), and E. shepardiana (8.5 %). Collectively, these six species accounted for 97.1 percent of the mussels collected (Table 2). Comparison of data from the 1968, 1993, and 1998 surveys indicate clear differences in species composition and relative abundance among surveys (Table 3). The most notable shift in species composition was apparent upon comparing the 1968 relative abundance data to the 1993/1998 data. The 1968 collections contained more L. dolabraeformis (56.5 %) and E. spinosa (10.0 %), whereas E. iClerina was absent, as were three species that were collected in 1993 and 1998 (Uniomerus carolinianur, Pyganodon gibbosa, and Vil/osa delumbis).

Differences between the 1993 and 1998 collections were primarily due to relatively fewer E. hopelOnensis and relatively more E. iererina in 1998 compared toJ993 (Table 3). I The September 1998 collections included 1,213 live mussels and 123.5 shells (Table 2). Shells of 8 of the 12 species encountered in the survey were collected . . The six most abundant species r accounted for 98.3 percent of the shells,compared to 97.1 percent of the living mussels. There I were greater differences at the species level between the relative abundance of living mussels and shells. E//iplio hopelOnenris. E. darienris. and L. splendida accounted for 83 percent of the I collected shells, compared to 57.2 percent of the living mussels. Relatively few E. shepardiana and E. iClerina shells were collected (3.2 %) compared to the occurrence of living specimens in I the collection (28.3 %). I 3-1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 AltamahaRi'ler Mussel Survt!}' Deceillber

2. 1998 LA W Project J 2000-8-0 178 3.2 ABUNDANCE The abundance of mussels in the study area was based on the number of mussels collected . hour of effort (CPE). This approach allowed for comparison of the September 1998 survey with the 1993 data collected QY Dr. Keferl (Appendix B; Table 8.2). The 1968 data were . as the number of mussels per square meter and therefore:

the 1968 abundance data are not directly comparable with the 1993/1998 survey results. The much lower water levels encountered by Sickel (1969) compared to the \993/1998 surveys was more conducive to estimating mussel densities. The overall CPE for the September 25-26, 1998 survey was 46.0 mussels per hour, representing I 41.8 living per hour of effort compared to only 4.3 shells per hour of effort (Table 2). The September 1998 collection included several age groups of the predominant species. Young I mussels (less than five years old) were observed for E. hopetonensis. E. dariensis, E. shejxzrdiana, and E. icterina. Although hand picking is biased toward larger mussels, the occurrence of young mussels in 1998 indicates that reproduction is occurring in the Altamaha River . . I I The 1993 survey of the Altamaha River yielded a higher CPE than did the 1998 survey with an overall CPE of 118.8 representing 102.2 living mussels and 16.6 shells per hour of effort (Table 4). The 1993 CPE for live mussels was greater than the 1998 CPE by a factor of two, whereas the 1998 CPE for shells were much lower than the 1993 CPE (4.3 vs. 16.6 shells per hour of effort, . r .respectively). The differences between years was primarily due to more E. hopetonensis in the 1993 collections (Figure 3). I Examination of the 1993 CPE for specific locations indicated that 301 of the 554 living E.I hopelonensis,or 54 percent of the total nwnber of living specimens collected in 1993 were from RM 122 (Location 1), compared to only 64 (or 19 % of the living specimens) at the same location I* in 1998 (Appendix B; Tables B.I and B2). Differences in CPE between years likely reflect collecting efficiency between years based on lower water levels in 1993 .I 3.3 SPATIAL DISTRIBUTION I The distribution of mussels in the Altamaha River between RM 122 and RM 110 varies widely I based on the results of the September 1998 survey (Appendix B; Table B.I). The number of live I 3-2 --_. I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 t Altomaha River Mw.rel Survq Deumber 2.1998 LA W Project mussels collected ranged from none at Location 12 (RM 115.4) to 311 at Location I (RM 122.0).. Shells were not collected at seven of the 23 collection sites and the maximum number of shells (37) was collected at Location 12. The general distribution of mussels in the survey reach was evaluated by comparing the average CPE for the six collection sites upstream of the U.S. I ,Highway bridge (Locations 1-6) with the average CPE for the 17 doWnstream collection sites (Figures 2a and 2b). That comparison showed that live mussels were collected at twice the rate upstream of Plant Hatch (Table 5). Overall, 28 percent of the total effort was extended upstream, which accounted for 45 percent of the total collection. Shells were collected at similar rates upstream (5.6 shells per hour of effort) and downstream (3.7) of the U.S. I Highway bridge. Examination of the collection data at the species and location level indicate that the collections at Location I at RM 122.0 contributed to much of the observed upstream/downstream differences (Figure 4) . . The Location I collection accounted for 23.3 percent of the total collection and 58.5 percent of the E. icterina. On average, the higher upstream collection rates were due to E. hopetonfmsis, E. shepardiana, E. icterina, and L. dolabraeformis. Upstream/downstream collection rates for E. dariensis were similar, whereas collection rates for L. splendid a were higher downstream (Table 5). Similar spatial differences were evident in the 1993 survey data collected hyDro Keferl (Table 6). As in 1998, the overall upstream collection rates in 1993. were higher by a factor of approximately two and collection rates for the six predominant species followed the same general upstream/downstream trends noted for the 1998 survey. In both the 1993 and 1998 surveys, Uniomerus carolinianus, Pyganodon gibbosa, and Utterbackia imbecillis were collected more frequently downstream of the U.S. 1 Highway bridge. These three mussel species are commonly associated with soft mud bottoms and slow moving water (Johnson. 1970), habitat that was sampled more downstream than upstream in both the 1993 and 1998 surveys. Examination of habitats sampled at each site (Table 7) and channel features within the reach that was surveyed (Figures 2a and 2b) suggest that the observed mussel spatial distribution pattern 3-3 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10 , 2006 AI/amaha River MlISs,1 Sw-ny December 2. 1998 LAW Project J2{)()()..8-0178 reflects habitat and not the operation of Plant Hatch. The highest collection rates both upstream and downstream of Plant Hatch were associated with stable sand bars at the river bends near RM 122.0, RM 118, RM 114, and RM 110. The river channel downstream of the U.S. I Highway

  • bridge is relatively straight between RM 117 and RM 114.5, a reach where collection rates were consistently lower in 1998 (Figure 4) . . The collection sites within this reach generally had steeper . banks, less stable sand bars, and higher currents than .collection sites at the river bends where collection rates were consistently higher . .."----.. _. I I I I I I 3-4 .... .. -

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Altamaha Muss,1 Survey December 2. 1998 LAW froj,ct J200Q-8"(}178 4.0

SUMMARY

A September 25-26, 1998 survey of the freshwater mussel community in a 12-mile reach of the River in the vicinity of Plant Hatch documented the continued existence of viable populations of 12 mussel species. Mussels with State or Federal threatened or endangered status are not known to occur in the vicinity of the facility, but .the collections were dominated by species that are endemic to the Altamaha River system andlor are considered by the USFWS as "Species of Concern" because the status of their populations is not known. The September 25-26, 1998 col1ections included six species listed in the GDNR and USFWS databases and six other species that are known to occur in the Altamaha River system. The collections were dominated by E. hopelonensis (29.2 % of the total collection), E. iClerina (17.5 %), Lampsi/is splendida (16.2 %), E. dariensis (14.3 %) L. dolabraeformis (11.4 %), and E. shepardiana (8.5 %). Collectively, these six species accounted for 97.1 percent of the mussels collected in 1998. A comparison of the 1998 survey data with data collected in the vicinity of Plant Hatch in 1968 t and 1993 suggest shifts in species composition and relative abundance, particularly between the 1968 and the 199311998 surveys. The most notable shift in species composition was the lower I relative abundance of L. dolabraeformis and E. spinosa in the 1993/1998 surveys compared to the 1968 survey and the absence of E. iClerina, a common species in the 1993/1998 collections; in ..... . I ... 1968 survey. I The shift in relative abundance suggested by comparison of the 1968 and 199311998 survey data may be related to a combination of factors including water levels during the three surveys which I can effect mussel distribution and sampling efficiency. The shift also corresponded with the invasion of the Altamaha River system by the Asiatic clam (Corbicula manliensis), which was I first reported in the system in 1971 and reached densities of 52,000 square meter in the vicinity of Plant Hatch by 1974 (Sickel, 1976). Qualitative changes in unionid densities between the 1968 I collections (Sickel, 1969) and limited data collected in 1973 and 1974 led Sickel (1976) to suggest that the abundant Corbicula population may be competing with . the larval and juvenile unionid I populations in the Altamaha River. I I 4-1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10, 2006 I Altomaha River MrasII Suney December 2. 1998 LAW Projlct 12()()(J...8..()178 I The 1993 and 1998 survey data indicates that, on average, mussels within the Altamaha River study area are more abundant upstream of Plant Hatch " than downstream. Live mussels were I collected at twice the rate upstream in 1998, and in 1993 the average collection rate was over six times higher upstream. Differences in collection rates between yearS likely reflect the direct I effects of water levels " on mussel distribution and collection efficiency. Consistent spatial " differences between years suggeSted that the of habitat within the river reach I surveyed, rather than operation of Plant Hatch. accounted for the lower downstream collection rates. The highest collection rates both upstream and downstream of Plant Hatch were associated I with stable sand bars. The river channel downstream of the U.S. 1 Highway bridge is relatively straight between RM 117 and RM 114.5, a reach where collection rates were consistently lower in I" 1993 and 1998. The collection sites within this reach generally had steeper banks, less stable sand bars, and higher currents than collections sites at the river bends where collection rates were " I consistently higher. " I I I I I I I I I I I 4-2 ---_....._ ---- Enclosure to I\lL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Altamaha River Mussel SIUW)I December 2. UW Project

5.0 REFERENCES

Johnson, R. 1. 1970. The Systematic and Zoogeography of the Unionidae (Mollusca:Bivalvia:Unionacea) of the Southern Atlantic Slope Region. Bull. Mus. Comp o Zool. 140:263-450 Sickel, J. B. 1969. A survey of the Mussel Populations (Unionidae) and Protozoa of the Altamaha --River with Reference to their use in Monitoring Environmental Change.s. Master of Science Thesis, Emory University. Sickel, 1. B.1976. An Ecological Study of the Asiatic clam, Carbicula inanilensis (Phillipi, 1841), in the -Altamaha River, Georgia, -with Emphasis on Population ' Dynamics, Productivity, and Control Methods. Ph.D. Dissertation, Emory University, Atlanta, Georgia. 1 r I I I I I 5-1 ..----------r---. ..-... -..---.. Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Allamp/Ja River M_I Swwy /998 LAW J I. r* TABLES ...

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10 , 2006 Allamaha River Mussel Survey December 1, 1998 LAW Project No. 12000-8-0178 Table 1: Freshwater Mussels Potentially Occurring In the Allamaha River near Plant Hatch. Global State Last Date Scientific Name Common Name Rank Rank Reported County U.S.G.S. Quad A/asmidonta arcula Altamaha arc-mussel G1G2 S2? 1968-Summer Appling Baxley NE 1968-07-00 Appling Gray's Landing Elliptio dariensis Georgia elephant-ear G3 S3 1968-Summer . Appling Baxley NE Elliptio hopetonensis Altamaha slabshell G3 S3? 1968-Summer Appling Baxley.NE Elliptio shepard/ana Altamaha lance G2 S2? 1968-Summer Appling Baxley NE Elliplio spinosa Georgia spiny mussel G1 S1S2 1969-05-00 Appling Baxley NE 1969-08-00 Appling Gray's Landing Lampsilis dolabraeformis Altamaha pockebook . G2 S2? 1969-{)8-{)0

Appling Baxley NE Source: GDNR (1996) and USFWS (1997) databasesPrepared by: RGK 10/17/98 Checked by: CWN 10/30/98 Page 1 of 1 I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I -December 1,1998 Altamaha Mussel LA W Project No.

Table 2: Summary of Freshwater Mussels Collected from the Altamaha River near Plant Hatch, September 25-26,1998. Overall Collection Live Mussels Shells c} !if>> >>< (1)< (1)c}iii iii () ::u co [ ::u co :II co (1) (1) CD (1) (1)c}Ziii iii Z c: z [ P 3 P (1) (1)Z() ()ca ... >> a >> a0-3 C c r c m< :::J i! <' :::J fl :::J (1) 0. (1) 0. ... 0. DI a DI :! i:l s:: :::J""0 C ""0 0 ""0 -en:::r (1) £ (1) (1) ... !:l ... :::r (1) ... :::r (1) ::r !l :::r;-0 iii" ;-0 iii" ;"' Elliptio hopetonensis 390 29.2 13.4 342 28.2 11.8 48 38.9 1.7 Elliptio darien sis 190.5 14.3 6.6 159 13.1 5.5 31 .5 25.5 1.1 Elliptio shepardiana 114 8.5 3.9 112 9.2 3.9 2 1.6 0.1 1 . Elliptio spinosa 1 0.1 0.0 0.1 <0.1 0 0.0 0.0 Elliptio icterina 234 17.5 8.1 232 19.1 8.0 2 1.6 ,0.1 Uniomerus carolinianus 7 0.5 0.2 6 0.5 0.2 1 0.8 0.0 Alasmidonta arcula . 2

  • 0.1 0.1 2 0.2 0.1 0 0.0 0.0 Pyganodon gibbosa 4 0.3 0.1 4 0.3 0.1 0 0.0 0.0 Utterbackia imbecillis 20 1.5 0.7 19 1.6 0.7 0.8. 1 . 0.0 Lampsilis dolabraeformis 153 11.4 5.3 138 11.4 4.8 15 12.1 0.5 Lampsilissplendida , 216 16.2 7.4 193 15.9 6.6 23 18.6 0.8 Villosa delumbis 5 0.4 0.2 5 0.4 0.2 0 0.0 0.0 Totals 1336.5 100.0 46.0 1213 100.0 41.8 123.5 100.0 4.3 Prepared by: RGK 10/27/98 Checked by: CWN 10/30/98 Page 1 of 1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Altamaha River Mussel Survey December 1 , 1998 . LA W Project No. 12000-8-0178 Table 3: Relative Abundance of Mussels in the Altamaha . . River In the Vicinity of Plant Hatch, 1968,1993, and 1998 . Relative Abundance

(%) Species Sep-98 Jul-93 Bliptio hopetonensis 29.2 44.7 Elliptio dariensis 14.3 8.6 Bliptio sheparriiana 8.5 7.2 Bliptio spinosa 0.1 0.6 10.Bliptio ietanna 17.5 5.5 Uniomerus earolinianus 0.5 0.9 Alasmidonta arcula 0.1 . 1.5 Pyganodon gibbosa 0.3 1.5 UttertJaekia imbeeillis 1.5 2.3 0.LampsiliS dolabraaform;s 11.4 12.4 Lampsilis splendJda . 16.2 14.7 Vil/osa delumbis 0.4 0.1 0.Total 100.0 100.0 100.0 I Notes: 1. 1968 data from Sickel, 1969. 2. 1993 data from Dr. Eugene Keferl, Coastal Georgia Community College, Brunswick. I Prepared by: RGK 10127/98 Checked by: CWN 10/30/98 I I I I I I I Page 1 of 1 I _ .. ---------.-_ _ r __ ___ _ :......-. _. I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10 , 2006 ---_.December 1 , 1998 Altamaha Mussel LAW Project No. 12000-8-Table 4: Summary of Freshwater Mussels Collected from the Altamaha Rivernear Plant Hatch, July 13-15, 1993. i Overall Collection Live Mussels Shells i d Iii' I j ->> >> z < < 0 111 -I 111 j iil 0 () ::0 (Q lit ::0 ::0 <C I 0 111 II -III III II II z d is iii" z iii" iii" z c eo 'z eo n p 3 < P i < P II II 111() CT () Z ()I CD >> c >>Q. .., 0 0 r f; CT 3 CT* c r c c: iii'<' :) <' :) [ [i.., ::l II a. a. a.111 I\) I\) I\)+ :) :) 0 :) a. en 0 'D c:: fil al en fil al::T II III IIJ.., .., ::T .., CD IIJ ::T 111 ::T ::T Species .§: :" iii :" iii :" El/iptio hopetonensis 629 44.7 53.1 554 45.7 46.8 75 38.1 6.3 Elliptiodariensis 121 8.6 10.2 100 8.3 8.4 21 10.7 1.8 Elliptio shepardiana 102 7.2 8.6 95 7.8 8.0 7 3.6 0.6 Elliptio spinosa 8 0.6 0.7 4 0.3 0.3 4 2.0 0.3 Elliptio icterina 78 5.5 6.6 75 6.2 6.3 3 1.5 0.3 Un i omerus carolinianus 12 0.9 1.0 9 0.7 0.8 3 1.5 0.3 Alasmidonta arcula 21 1.5 1.8 21 1.7 1.8 0 0.0 0.0 PYflanodon gibbosa 21 1.5 1.8 17 1.4 1.4 4 2.0 0.3 Utterbackia imbecil/is 33 2.3 2.8 14 1.2 1.2 19 9.6 1.6 Lampsi/is do/abraeformis 175 12.4 14.8 141 11 .6 11.9 34 17.3 2.9 Lampsilis splendida 207 14.7 17.5 180 14.9 15.2 27 13.7 2.3 Villosa delumbis 1 0.1 0.1 1 0.1 0.1 0 0.0 0.0 Totals 1408 100.0 118.8 1211 100.0 102.2 197 100.0 16.6 Prepared by: RGK 10127/98 Checked by: CWIV 10/30/98 Page 1 of 1

1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 December 1, 1998 Altamaha Mussel Survey LA W Project No. 1 Table 5: Comparison of Freshwater Mussels Collected from the Altamaha River Upstream and Downstream of U.S.Hlghway 1 Bridge, September 25-26, 1998. Live Mussels Shells Upstream Downstream Upstream Downstream

>> -I >>< 0 < CD CD-I CD CD .., 0 eI iii iii iii OJ[ ;:0 co z ;:0 co ;:0 co ;:0 co IP IP c: CD CD -I CD CD c} CD CD Z iii 3 iii *0 iii iii c: d: z <:2". :Z z [ <:2". Z P 0-E P < 0 3 < CD < P CD ., CD CD Z IP 0-() () c: Z () c () ., >> Q. 1; 0 >> Q.CD 0-0 l: 3 3 r -r c: c: c: CD:c. c: ::l f :c. ::l [ g ::l if ., g 0::l a. a. ... a. a.CD CD eD OJ OJ 0 OJ 0 OJ Co s: ::l a. s: ::l ::l ::l C 0 "0 c: "0 -en -en 0 "0 If) CD CD If) CD 1il CD CD., ., :::T ., :::T ...If) en CD IP :::T IP :::T :::T :::T Species iii ;"' iii ;"' iii ;"' ijf ;"' Elliptio hopetonensis 98 17.6 12.0 244 37.1 11.7 19 41.3 2.3 29 37.4 1.4 Bliptio darien sis 85 15.3 10.4 74 11.3 3.6 2 4.3 0.2 29.5 38.1 1.4 Elliptio shepardiana 58 10.4 7.1 54 8.2 2.6 2 4.3 0.2 0 0.0 0.0 Elliptio spinosa 0 0.0 0.0 1 0.2 <0.1 0 0.0 0.0 0 0.0 0.0 Elliptio icterina 218 39.2 26.6 14 2.1 0.7 2 4.3 0.2 0 0.0 0.0 Uniomerus caro/inianus 3 0.5 0.4 3 0.5 0.1 0 0.0 0.0 1 ' 1.3 0.0 Alasmidonta arcula 0 0.0 0.0 2 0.3 0.1 0 0.0 0.0 0 0.0 0.0 Pyganodon gibbosa 0 0.0 0.0 4 0.6 0.2 0 0.0 0.0 0 0.0 0.0 Utlerbackia imbeciJIis B 1.4 1.0 11 1.7 0.5 1 2.2 0.1 0 0.0 0.0 Lampsilis do/abraeformis 14 2.5 1.7 124 18.9 6.0 2 4.3 0.2 13 16.8 0.6 Lampsilis splendida 69 12.4 , 8.4 124 18.9 6.0 18 39.1 2.2 5 6.5 0.2 0.5 2 0.3 0.1 0 0.0 0.0 0 0.0 0.0 Villosa delumbis 3 0.4 Totals 556 100.0 67.8 657 100.0 31 .5 46 100.0 5.6 77.5 100.0 3.7 Prepared by: RGK 10127/98 Checked by: CWN 10/30/98 Page 1 of 1

I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10, 2006 -..--, .,....,.. AI/amaha Mussel December 1 , 1998 LA W Project No. 12000-8-0178 I Table 6: Comparison of Freshwater Mussels Collected from the Altamaha River Upstream and Downstream of U.S.Hlghway 1 Bridge, July 13-151993.

I live Shells i Upstream Downstream Upstream Downstream -i' >>0 -i ." miil iil iil liT ::v !O z AI !O AI !O AI !O-(1) (1) (1)ro r:: ." c} ID IDiii c: Z c::t. z 3 [ z [ z < P :c. p :c. p pro .., (1) (1)Z z() ()." 0 c: c: 0-0-0 3 0-Q. 3 0-Q..., >> b> .... >> >> r r:: ii' c: r:: (if 0-r:: nr 0-r:: nr ::I ID ::I CD ::I a. a. n-.., a. n-.., a.III III III s:: ::I s:: ::I a. g, ::I 0 ::I a. c: "0 r:: 0 0 "0 en In &l CD III ." ." (J) &l j -." .".., .., ::T .., ::T .., CD ::T CD ::T m. ::T ::T In Species iii ;"' iii ;"' iii ;"' iii <f!. ;"' Elliptio hopetonensis 397 52.2 80.7 157 22.7 7 31.8 1.4 68 38.9 9.8 Elliptio darien sis 41 5.4 8.3 59 13.1 8.5 0 0.0 0.0 21 12.0 3.0 Elliptio shepardiana 81 10.6 16.5 14 3.1 2.0 0 0.0 0.0 7 4.0 1.0 Elliptio spinosa 0 0.0 0.0 4 0.9 0.6 0 0.0 0.0 4 2.3 0.6 Elliptio icterina 73 9.6 14.8 2 0.4 0.3 2 9.1 0.4 1 0.6 0.1 Uniomerus carolinianus 2 0.3 0.4 7 1.6 1.0 0 0.0 0.0 3 ' 1.7 0.4 Alasmidonta arcula 17 2.2 3.5 4 0.9 0.6 0 0.0 0.0 0 0.0 0.0 Pyganodon gibbosa 0 0.0 0.0 17 3.8 2.5 0 0.0 0.0 4 2.3 0.6 Utterbackia imbecillis 0 0.0 0.0 14 3.1 2.0 4 18.2 0.8 15 8.6 2.2 Lampsilis do/abraeformis 73 9.6 14;8 68 15.1 9.8 2 9.1 0.4 32 18.3 4.6 Lampsilis splendida 77 10.1 15.7 103 22.9 14.9 7 31.8 1.4 20 11.4 2.9 Vi/losa delumbis 0 0.0 0.0 1. 0.2 0.1 0 0.0 0.0 0 0.0 0.0 Totals 761 100.0 154.7 450 0.0 64.9 22 100.0 4.5 175 100.0 25.3 Note: Data provided by Dr. Eugene Keferl, Coastal Georgia Community CollegePrepared by: RGK 10/27/98 Checked by:. CVWJ 10/30/98 Page 1 of 1

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Altamaha River Mussel LAW Project No. Table 7: Mussel Sampling Sites In the Altamaha River near Plant Hatch, Toombs Appling Counties, Georgia, September 25-26, Sampling Live Mussels Site River Mile Habitat Type (no.lhr.)

1 122.0 Head of sand bar 155.5 2 121.9 Backwater at end of sand bar 53.8 3 118.1 Shaded bank 30.8 4 117.8 Tailend of sand bar , 1.0 5 117.6 Steep bank downstream of small slough 73.8 6 117.3 T ailend of sand bar 28.5 U.S. 1 Highway Bridge 7 116.9 Steep bank 26.7 Plant Hatch 8 116.5 Steep bank 40.0 9 116.4 Steep bank 21.0 10 116.4 Bank side of sand bar 10.0 11 116.4 On sand bar 0.0 12 115.4 Sand bar 26.0 13 115.4 T ailend of sand bar 21.0 14 115.4 Head of sand bar 79.5 15 115.1 Sand bar 2.0 16 114.7 Mouth of cypress swamp B.O 17 114.5 Backwater slough 10.7 18 113.8 Ponded area at tailend of sand bar; mouth of oxbo w 50.4 19 113.7 Side of sand bar 20 110.5 Steep bank 73.3 21 110.5 Slough at tailend of sand bar 20.0 22 109.9 Backwater at tailend of sand bar 24.0 23 109.9 Tailend of sand bar -74.5 December 1, 1998 Page 1 of 1 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 AltDmtlila RM,. MlISs.1 Swwy DeCC!",bn

2. LA W p,.oj.ct Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 FRESHWATER MUSSEL AL TAMAHA APPLING COUNTY. N SITE LOCATION MAP LAW LAWGIBB Group Member PROJECT No. 12000-8-0178 FIGURE PREPARED BY: :0'5 11>/30('8 I

Encl o sure 10 NL-13-1528 SNC Letter 10 U. S. F i sh and V'v\Idlife Service , Dated November 10, 2006 _...... ;:..;; .. --: .............. -.-,,:.. -.... , £d..' .... ..' \. -., I'" '-" r:...'" " l ..**-1 ", ".'" .... "'.' -I" *' M-=.._ =-;.' + : ';.L ": ',!t.1 N . ....... \. " ' ',:' " ..... H:" ,\ \. \, \ \ i s ,:. '. \ 1 ) . LU I .*' . 2 I ,,;.t*;'*. ',--_.,./ // -Io j j 81(-' .,,/R M 122, 0 ,,:/:.: 2 . ... :;;:; "= RM _,>' RM" i" 17.il .l iB , J o I. __ ']' =-__:::.-::_.... ' .. *."',,",...01:-: _,._.. ; . ' .R M 1 1 7 ,0 0 ', I RM 11 6.9 RM 116 , 0 ',i, n . y B I ..... r ' T (;r..r J(3S' L v * ":c ,--'-:,--__ ----:J.C-,1:C'C C0---9 -.,. -" -'1 -.. :, ." 10 --. -._ _.:: " -=" .. ,/ -.... :1 it-...:::;:' ,J ' ". .' ..,.i.r-_ ." ...... , 0;,-,..> ;,I, _ _ '-'---" . ..,:-" _. . .-.o:-u--.. (, .--.. .--' , j" .... -$....'/J .... ' ..,. " -<:: ' '-t---i:-;'--. , . . '. " "'" S: A... :. , LEG E ND c* :;'Ot"'.POOR Sampling Location _ RM R i ver Mile 1. S amp lhg Le ca tion Map A itamaha R iv e r , LAW'Map S D urc e: US G S 7.!j min. T opo gra p h ic Qu ad ra ng les; Gra ys La nd ing Pwjt:c t N o. c T o ombs and Ap p l in g Couct is s. Ge c':;Ji a (p ho t o,inspeclod l S BSland Ba xl e y H E (pho to-rev i se d 1988) F igure 2aP repare;; By' =£ C" ec ksa Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wldlife Service , Dated November 10,2006 '...... ,..... ,"'W .. ? h .. .. ...... , ..... .:, ,. oJ-""" I "-'-. -....:---:., -j ..'" .....,...: " ......--::-::-. .. *. ..., .)i.. :... *_r ....... "'"" ...... I I .-..... ""--.' 1 6 -' <:;; AM 1 12.0 . 1. ""------_. '. AM 116.0 1;; -"'" "'" 1'. il 16 1 8..** .... RM 1 1 3,6 .'.'?I O-, ."/ ...... ...\ i .... '" '-' , '. '.' . ' ..) .;;"....................i 1 13 1 2 '0" "-'C I' '" . ...... _,... I /i '-. , a+:-. ., -"AL 'i A.}f A .11.-/ ........, , '\. / I ....."/4 ,23 _.... _-,'-.. : 7:':;:'/ 1';"? r: 1or *. _2'2 *' \, tiM 1 09.'9 1 5

  • 2 0 R M j 1 0. 5'-RM 1 1 4.5 . '( ' 2" 1 .' .j-,-.-

/ " S':"'.! LEGEND POORatMUrY

x: RM Riv e r MilSampling L ocation Samplin g Lo:;a1io n M ap A lt a m aha R Ver LAW--** l oor:J ;:':$ one CO;'Jr:!l es , -Gecr g i a P"'Ject N o 1200(pil o te.inspe c ted 1985) ano Baxley NE (photo-revisod 1988; .. i LAwgl§.§ Group F igur e Bas e Map Source; USGS 7.5 min. Topographic Quadra n gles; Grays Landing f,:{ ... IIIh."t H" e Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I I I I I I I I I I I I I I I ---------_._----------------

---_.__......__.__. 50* i 45 . I I I I 40 ! 1 35 01 993 I 01998 .;:. 30 .. 4; a. 1:> OJ , i ti 25 -0 u 0 UJ 20 0.. u 15 . I --I I ,. 10 -,*.. , I I ( I I 5 . -I 0 / R ,'..,., ..,;.cr",':r-" I I ! , I 1 I l I V) <: III <:: :2 '" 2: g Q] Species {g '" Q E '"..... I I j I I , I _.. POORQUAUTY ORtGlNAL Freshwater Mussel Survey Comparison of the CPE for Six Mussel: il AW .Altamaha Rver ! j Species Collected in 199 3 a nd 1 998 Toombs and Appl'ing Counties : LAWGIBB Group Me.!!,ber. Georgia Pr Oje-ct No. 12000-8-0178 Figu re 3 Prepared By : RGK 10/30/98 Checked By : CIlvW 1 0/30/98

140.00 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 160.00 '12 0.00 1:: ,g 10 0.00 U J I '" a. 1>0.00'0 .l!! <.'l 2! o () " 6000 z 40 0 0 2 0.00 0.00 0 m co '" ..; ,..: N C;; Fresrlwater Mussel SurvAltamaha Toombs and Appling _.-. O OIM r Spec ie s Ol.am ps/lis sp len<ilda I 1 0 Lamps ilis dolablaefolmis i I EI E/lip t io icterina _ El/ipt i o shepardi allf1 , Ii1 ElHp ti o d arie n sis I O EUl ip tio Ilo pe lonensis .., (J)to U) '¥ ro I e O l " c ,..: ,..: <D <ri <ri .. '" j ui ,0; ,,., a'" 0; o;: River Mile Spatial Distribution of Live Mussels by River Mile, September 25-26, 1998 Project No. '12000-8-0178 Figure 4 Prepare{j By: RGK 10/3 0198 Chec i<.ed By: CVVVV 10/30!98 POORQUAUTY ORIGINAL Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I Altomana River Mussel Survey December 2. 1998 LAW Project 12000-8-0178 I I I I I I I I I APPENDICES I I I I I I I I I ------_.--..... ---_.

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 December 2. 1998 Altamaha River MlUSel Survey LA W Project 120()()..8.0178 APPENDIX A Field Data Records I* Enclosure to I\JL-13-1S28 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 FIELD DATA I I I Bank V89eUltton Shading Banlc Slope Banlc Height Water Substrate Organic Material I Fallen Trees StUIllP S I Lags Leaves Detritus I Aquatic Vegetation I Water Temperature I Depth Sampled Current I . Genero! oeseri pt; on of *.aten I I I I .;1. ,-,,/l4k-r I,..cJv r 1-0,-l-* . Area Ollf! o* /(J I C -3' til s+-AL./ t'i i ,,, 111..*dd,,* +Yc'o) l, r to, ib \g iV111\ 1.3 c.olle&.-frr.. Ju,v".. ..l Areas Sa.led Loc.r ( ).Area Two IS"/t Are! Three Area Four .:>...0/ktUKi . Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 kG s-A Species Obs.netI Alive Sh.lls Aliv. SMlls Alive Shells Allv. Shells iJJlptl0 hopstonegsts 1Z -R Elliptio 'l=. 0 I Eiliptio sh'Rlrdl'nA 3.1 I 0 E\llptlD spinosa ElIlptia Icterlna 137 --_ :z..-..I

    • ....& 0 £ 111 pt 10 product. Unla..rus species -L AI.s.tdonta .reul. Anadont. g-Anodant. l.b.cillls t . TOllO las all .2!!!.!!!l I La.ps HI s sv lendt d. ,g.. i Lampstlls Vt Ilost d.lullbls

---I Vi I las, vi be:s7 7 I 3B to TOTAL 51J SA-(j:,-It J I /57 !4.'l re; s-3.c:. l,m/c4 itt E l"t I i'm/el1 ' I 3 J,*ct ," h<-1-c.f-s u.J bc< f'I 18 t2-D.st.s. Rec Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I t I I I I I I I I I I, I I I I I I FIELD DATA RECORD AltailN Rher 5yst_ Date: 91i £199-Field Nwller: _________ TIM: fEr, II IS' . Caput.r F1Ie Naber: ----'--.----:-:-,-r----:--.,..-------- COllecto..(s): , K-e kvl t 1<, '(\,/ . Mauney ba IlL), c.:hcd,G Lat. Long. Chan _______________ _ Locality: A/& 111 t h A. 0'<<, vee' M Mite. I M (:..11 (Hi! Reeks I TllH1 Bank Vegetation Shading Bank Slope Bank Height WaUr Substrate Organic Mate .. l.1 Fallen Trees Stll1llPS Logs Leaves Detritus . c Water Depth Sampled Current Gcnera of Anas Sa.let! Area One Area Four :l. 0 fll In 7 '1' Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Species Observed Elltptto hopetonenst, Ellfptl0 dartensls Ellfptl0 shepardiane I Elltptl0 Elltptio Elli pto specles Elliptl0 producta Uni o-erus species Alas.idonta freal. Anodonta gibbosa Anodonta i.beet!lis Toxolss.. pullus Lampst 115 dolabraeforais La.psills splendtd! delullbts I I I I 18 12-Data. Alive Shells .---tS ---L .5: I 40 .'" --... ..---".._-.-. ..-.-...* _.--_ ..__..--_._------ Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 ,II I I I n.e Bank VegeUtlon Shading Bank Slope Bank Height Water Substrata Organic Material Fa lIen Trees Stumps Logs Leaves Detritus Aquatic Vegetatlon Genera I Descr i pt i of FIELD DATA Are. One Are. Two Are. Three Are. Four f s:n,,'1 .---.... ..----------" -.

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Species Observed Alive SIIells AIt... SIleUs Ali"e Shells Alive Shells . i Ili pt i 0 hopetonells is -.-L i Elliptio derieftsis EiliDtl0 sheptrdl!nt

-Elliptio spinosa -E! Ilptio ieten;'a ill!P12 E,liptio -Unio_Pl! SpeCies -Alas.,dont& Anodonta -Toxalas.. P!!l!! LamPs1lis dalabraetarsis 14!psilfs splendida------VillaS! de hmbb Villosa vibex I ---I *-_0 TOTAL I I I 11'>'1/c.. 1'1. I f( 8 ...., :A. Lt I 194 3 V? I ,a '2-!)ata. Rec I I I I II I I I I I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 L..Q CoA."""'n '0.,:) 5 FIELD DATA RECORD /.3 u-1I(c/-",. Jwl.l'-r y ,( d-.v mIn A!3U AM!. One A.... Two ATN Three Four Tille a!1. 1:1, Bank Vegetation Shadin., Sank Slope Bank Hetght Water Substrata Organic Material Fllllen TM!es -.-.. ... AQuat:ic Veget:lltlon Water TeJll)er.ture Depth S4.pled Current of ..---_. ---Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Species Obser.ed A It.,. Shells Altve Shells Alhe Shells "lhe Shells Ellipti0 hopetonSftJis -1L Eillptio dllMensis Eiliptio shepardisn. -5"' Ellipti0 E 111pti 0 t c:terln! . --.3i !!.Ul!!2 sPecies -Ellipti0 product. Unio-srus species 2.----.0. Al.s.fdont. !!S!l! Anadont. glbbos. "nadont. imbecilils Toxolas.. pullus lamps!l!s dolabrlleforftfi Lall!!s11 Is splendid. delu_1s vibex -TOTAL 1'1. I I IS 12-0ata _

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 G. Pc.. t..oc.p.;:rl cn.J FIELD DATA REcmm Alt...ha River .. 'C' .$" rn e..... Ct. .s Date: '9/0 lezY: Field NlAlber:

TiM: 9: it7 /10.r 0 Cwrputer,.F1l3 Nlrllber: ---"'!"'.r* <0"'"' (k,'9 (1.1"'£ Ra., Lat. _______-;-_ Long. ________ Ch&rt I Locall ty: ______-,--_---,. __, J I L/ ' /'.v )...0 wr I '1 ::::... /. 3*hr .I I Tillie I Ba.nk VegeUtion Shading Bank Slope Blink Height I Water Substrate I Organic Ha.terial Fa lien Trees Stumps Logs Oetritu5 Aquatic , Vegetation I Water Temperature Depth S.IIIJIled I General Oescri pt ion of ,,4ters I I I I Area One :to m tb** !(\/qr:ri.J Po.cl-u ( . ,')-fa ( 5<utd -6,1-1:; V Area Twa Area Three Are!! Four , -,--_. --

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 speciel OIII...,M Eiliptio hopetOfteftSis EllIptio dariensts E II I pt 10 shep"rdfl!! . Ellhtlo spinosa Eiliptto letarin. Ipec:1es Eiliptio product. Unto_tVa spec:ia Alu.idont.

!IS!!!! Anodonta .9lbbosa AnodonU 1!!bss1l1 Is Toxol.s..* pullus Laws1 I is do labraefon.1s La.psi l ls splendid.I *1 I r-, I I I I I Al tv. Shells AIf". Shells Attn Sh.lls AU". Shells , 1 --...a. -.fl... Cf -L ----i:I-_..3-7--=L=-.-. --.-----._1"1 Jf) -----.._._--------------- Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 FIELD DATA RECORD AltauliA RiVer 5yst_ 91u 19.L. Field ".tier: tfJ(.' '9f(f).' I 7 TI_: 2:26_1L 4 -r-Coapllter File Hllllller: Collector(s): -:z it '{; { t(rn c, Mama"kg 14 7 J I . I -eo f.-Lat. ______---;-Long * ."......_____.....-_ Chart ___""'!"'"___. ___________ _ Loc:a II ty: ____. * ....L.q Tille Sanlc vegetation Shading Sanlc Slope . Banlc Hel ght Water Slibstrate Organic: Material Fallen Trees StUIllP S Logs Leaves Detritus I Aquatic I Vegetation Water Teaperature Gener"l Oescri pt Ion ' of Waters I I I I I Areas Sag led ArelTwo Area Three Arel Four Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I I I I r I I I I Species Obsened Iitfptio hOpetoMMi! £lllptlo dariensis ElIlptio shsptrdh... *. Eillptio spinosa. Eiliptio leterlna E III pto species £lllptl0 producta Unla.eru$ species Alas.ido"£! areula Anodon*U gibboS! Anodonta 1mbeelllls Toxolas.. pullus Lampsills dolabraeformis l4!psills !plendlda !!!.l..2!.! de I UWIb h VI! lou vIbex TOTAL 18 Rec Altve Sllells Allve Shells Alive Shells Alive Shells I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Serv i ce, Dated November 10,2006 LOcATIo" & FIELD DATA RECORD It.,,M River Date: 9)u.h & . TIM: '.6CrJ. Collector(s): . . L&to J /f/./-ns,a h<< Tie Bank Vegetation Bank Slope . Bank Height Water Substrate Organic Material Fallen StUWIIS I Logs . Leaves Detritus I Aquatic I 'Ie<jeutlon Water Depth Sampled Current General Description

f ;;atenField

___

.!_I f(.;.......I..,;r-:.,... ...... .....;..:

___ :J.[) eo.puter FII. Nllllller: j{'b.wl lin"( I I Long. _________ R, Veer, " A-I? At / ____________ _ IfA q ort t M/1a.:Z T Chart _______ ___ II C,.£ "reas Sa., led Al"@aTwo Are. ThT"ft Atea Four :2-r' sL..7 b F !LIe <fit., .. _ !Wvczh'j/ "2 , ! I \ I {3 -----------_. .-.--. ...

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 species Ob..ALlY. Shells Alive SII.lls Alive Site I Is Alive Sllells 'Elllptl0 hopetonensis [lllot;o dariensls Eillptl0 shepardt.n. -Eillptl0 tptl 0 I l.!J.!.212 Ell hrti0 Utllo_rus spec:iAlasaldont

    • Anodonta Anodonta Toxolas..* La.psilis dolabraeforals L**pslliJ

+ VI \Iou delullbls -!i.llill. I . ..... TOTAL I f I I la *:-04t4. I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10, 2006 CSQ;h1 (Q:; S \c,ktl #'\ FIELD DATA RECORD 10"-1/ Alt...ha Rtver Syst.. r C() 9' Os-119r Field N.o.r: Q!;....J9.,..::3-!..:-=-&..lf...)_ Oate: 1* I TIM: ::l '. fd..jJ -.!;-;IO Ca..,uter File Haber: *1 i?f..b.I; Ii", } Me Ids Lat. Long. Chart _______________Loclll1ty: ,A-I tr,fMQ b, Rtf'u,' /fK'M Tille Bank Vegetation Shading Bank Slope . Bank Height Water Substrata Organic Material Fa lien ' StUIDPS Logs Leaves Detritus Aquatic Vegetation LO(;jIItIl'D'" J c.cllc... 3"'O nnh'l ,/v'0'tiL I Water Tellperature Depth Sampled I Current of t '-.<Ya?rtad IL bU>f k r 1 I K bac. I LV Q lev-I IS: .. -. -""--"--11t,<< 't Area Foar J ; )" ect rc tsd fa a r! k ____()oJ/ tL. b ti r-.:...__ I .. -.--.-------- --Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 .... -,_ "" .r, ,.. . Eiliptio sheptrdlana ' Eiliptio 1pinosa Ellinlo tet.nna I* [lllptl0 producta species I "nodonta 9; bbosa "nodante I IIbac I 111 s I Toxa las.. pu !Ius Lamosilts dol.braeforais I L**DSilts 1plendld, deluabts I. TOTAL I I I I I /3 #2-0a td. "ec .-.. "'-SlIells Alhe Shells +/- -2 Alift Shells ..L2::: .3 '-t 2---1--1 de; WVlJ 4-T F Clr 1-0:1 5 cv0-13 t( eS l t l( e.. { #. 1/ Alive Sllells t-Ich , I 7 c /C..t 7 .':..,' I '--' - ---Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 ClS I FIELD DATA RECORD Lat. ______--:;---Long. Chart ________________ _ I LOCA II ty: Jr-ll.LM.:...l..-* ___________ _ t .*.Q"4u: RTiate I Bank Vegetation ShadIng I BAnk Slope BAnk Water SubstrAte OrganIc MaterIal Fallen Trees Stumps I Logs Leaves Detritus I Aquatic VegetAtIon Water Temperature Depth Sallpled Current General Description of "aten 0V'- Areas Sa.led '.,oe...\\Aru One Area Two "'" Area Three Area Four 3omu.. 30 Ar1<ao 1Mn.-d.J. eo r<fy I --... _.. . _--

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 1+

0.., A1:,ouf'5a-Q g4t" I Sa-J-Speci es Observed Alive ' Shells Alive Shells ' Alive Shells Alive She lis . Eillpti0 hopetone",i! I ..k!:f 1S(*. --2 I Eli fptto daMen,is L(!'} . I Ellfptl0 sheperd!.n. <0 ---4 El!iptfo sptnos. I Ell iptio fete"na b .ll!.!P!2 species Elltptto prodllCU Uni OlftnlS spec1 es Alas.fdonta I + I Anodoftta AnOdonta Toxa !as.. pullus La.osilfs dolabraefors;s 161 I Lampst!ls splendfda I :le(iSdf) I Vi llosa del.....ts I !!l!.2.!.! v'l bell I I I TOTAl I s='t 3.+-. Lf2 '[ . ). c;/I-LC /kwr"l;2.. c.c,.1 (i.vhv I 1.9. ;C;lm/cL L.-n/cLc. (,.j/"fb I VI ed ('1 ! C:: C(T 5(:, 3 r cj.I .51 3 k/d I '8 1-2-!la ta. Rec I ,8 I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 FIELD DATA RECORD . ct.!) . 12-' I 04te: 9/.u L!? L . Field Hnller: I (, 1(<-1 / Ti..: b,% c-puter File Nlmller: _____,;.,.....--';-- __________ I . Ke f.eA ( K! n.t t MarM'>/h a<'C('!.j LAt. _____ Long. -=-_____.,...-_ ChArt _________________I Locali ty: --I-A:+-L-' ......... ..... Lqtt..,;.!.....I....1 __.:....-_______4 --=.:Ioe .... I Sank Vegetation Shading I BAnk Slope Sank Height I Water Substrate Organic Fa lien Trees I StullllS I Logs Lellves Detritus I Aouatic Vegetation I Water Temperature Depth S4mpled I Current t3enera L Description of ;;aters I* I 1 I I / Areas Sa!!!led Are. One Area Th"! Am Four 1.. 0 . ftluY\.R < .-------------.. Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 III I I I I I I I I I I I I I I es Obsened Alive Altve Shells Alhe* Shells Alhe Shells Eiliptio hopetonens1, .Elllptl0 darlensl, shepard1aQl Elliptio spinosa Eiliptio lcterlna EI !lotio product. Unio!!rus species Alas.ldonta .reula Anodonta 91 bbosa Anodonta lwbeclilis Toxalasm4 pullus La.psilis splendlda Vi 11014 vi belli TOTAL lfl.{crH y 18 12-04t4. Rec Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 FIELD DATA RECORD Alt..... River 5yst.. U:;s-19 r Field Nlnlber: B:::........ __________ _Date: TI_: .5 1/:.....-(, I (, COllpuur File H.-ber: -----:---:----r-"77"".----------....;...---- Co llector(s): __ . W,;....-..::lot:..I.!"':u,ry,...,/--L!:It1c',.l.J.!l/.W'JLnft?7'1.</':l-I ______ Lat. __--:-____Long. ______.;......__ Chart _____.....,...___________ .......;.._ Locality: A:lh,,.,,q4 g RlINN, ARM ""1,7 Tille Sank Vegetation Shading I Sank Slope Bank Height I Water Substrate I OrganiC Material Fa lie" Trees Stumps I Logs Leaves Detritus I Aquatic Vegetation 5 I"vq-m (2 Are.., Sa_led Area One Area Two Area Three Am Four w.JI{J!y' (J(U hs I I Water Temperature Depth S4npled I Current I of I I I I 2-/ ---Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 I I Species Obsened Alive . Shells A11". Shells A11". Slielis Alive Shells gillptl0 hopetonensts E!!lptl0 darlensts E 11 I pt 10 she"..,,1 all! '-:2-" Eiliptio Eillptl0 lcterlna li.1.!.I!l2 spec 1Eillptl0 Unlo_rus Alas.ldonta Anodont. Anadonta Toxol.,.. 2!1l!1 La_os 1 lis dolabraefopals J..--Cl& . La!psl!ls splendlda Villose I TOTAL I 18 IZ-Oata. Kec ... --.--- Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 FIELD DATA RECORD I Sa.,..; (. ( t:gJl( : 12) I Field __--=£...R...!.;/(:....... .;.,.L*1.....:C?;".I9:....1Ei.L..:-.' .;-.1....I..'t _______I Collector(s): _______..:...lo.. ... Lat. __---:---..,,...-_--,-_ Lont. __.-;..._____ Locality: -&.A-..I.......I...JI .......:.;.JoR..I,JIlI k:'<<:",r-' ,-' __________L* Tflle I Bank Yegeut loa Shading I Bank Slope Bank Height I Water Substrate Organic Haterial Fallen Trees I StUIiPS Logs I Leaves Detritus I AQuati c* Vegetation Water Teaperature I Depth Sa.p led Current I Genera I Description of Water.; I I I I I S' /OVytr Areas S.."led Area One Area Two Area Three Aree Four l fit::; I-frr / c. 4.-S-' ,/l/CMLo:::::=. ,.--.. -...... '_.' --.

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Species Obserted Elliptl0 hopetonen,ts 511tptl0 dariensis Eiliptio shepardian.

Eiliptio spinosa Eillptl0 E II I pto species [lllptlo product. Unio_rus .pecies Alas.idonta Anodont. glbbosa Anodonta imbeciliis Toxolas.a pullus Lampsl lis dolabraeformis LallJlsllts splendid<< delumbls ll!..W! Alive Shells Alive SIIells Alhe Shells Alive Shells ---L I L --_. .. -K I 10,7 I 16 i1-n Ie( (4q}13 n-Data. ;J8 I I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 -........ (;oPe. DATA RECORD Z!::.. 10 Alt_1Na River Systs I V.2..!:.i'l t::P/(:tqqg: r Field Nuber: TI": (, \ j 'Gg q . COIIIIUter File -Huabc--r-=:

.:::=::.::====:====:===::===========M I Kt-,. Mc.hclls OQv," Mom! b. nOll Rem k/'=1IKeI LAt. Long. Ch.rt _______________I Locality:

Alta 14:10 h 9 £/I/&.C,* ,4{(J\,-1 II?>. f) Tlae Banlc Ve-getttion Shading I Bank Slope Bank Height I Water Substr.te I Organic Material Fa lien Trees Stumps Logs Leaves Detritus I I 'Iege'ta'tion Temperature I Depth Sampled Current Oesc:-;ption of "4ters I I I I I Arees Sa!!! Are, One Are, Two Are, Three Am 2c)@"l" \At, flaw . .. I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 l-FIELD DATA RECORD S C( nr.At cL.}' )-Alta..... River S,su. . I(. r #: I b ( Date: Field Nnbc!": £11(:1 HPJ:I] 993: q) . Tt.e: __....}L...::2:>-.:.:_

  • Fi Ie /Cullbe!":

I ____ Co llector(s)

___Lat. ' Long. ClIart ....________________

_ Local it,: I I I I Area Two Area Three Area Four I Bank V egeta t i on I Bank I Bank Height Water Substrate Organic Fa llen *1 I Detritus '1 "auatic Ye<J e tatlon . I Depth SupI Description aT I I I I I ---Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 I ---.L t L) \tt/{f' I U /c4 18 'Z-Oata. --_._----_...... _ -----... -*. ,-". ---.. I I r I I I I I t I I I I I I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 FIELD DATA RECORD Sam e. ct.5 A Ita.'" R1'ter Syst_ ( *1:::71(: (C(Q3 II) Date: /Pr _______9' / U Field Hullber: TI..: L I 1/1 CoIIpuUr FIle NDIIer:r--T"T-+--7"'7'---. __________ Collectar(s): .-' Moan e.yh,1!. HJ. Kf Q; It tGltIJJ . T} I' Lat. . LOII9. Chart ___-=:--_______Locality: Ad ht (cJ1Q b a , .t2, V=t.¢:, . kl'Zt0 )I O ..C knk Vegetation Shading Sank Slope Sank Height Water Substrate Organic Materl.al Fallen Trees Stwps Logs Leaves Detritus Aquat.ic Water Dept.h Cun-ent Genera I Descript.lon of \oIat.en Area One Area Two AI'!! Four LS 41flkJ' -.--........ Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 PIELD DATA RECORD ) oolte: rjzc/90: Field Hueber: __ ________ TI.e: Ca..,uter File Nuaber: ,--;--_________It I ,,' 2"2.. _____ __ _ Collector(s): -Z. ICe kIll t(, n" /t(4@evA ({nal I {I I /. Lat. Long. Chut ________________ _ Locality: ftl-hunwlw R (Vey , A:a. = ( Areas Sa.pled Area One Area Two Area Three Aree Four I Time Bank Shading I Bank Slope Bank Height I Organic Fallen Trees I StUIliPS I Logs Leave'S Detritus I Aquatic Water Te8Perature I Depth SaJDpled Current I Genenl . Description of W4.ters I I I I I Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 , I #a 12-0,na. ;l.ec ---_._-------- Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 /'\1 \.IlK-cLT ::J. C. . / o G hv-k'V't Ga.\,((dATA RECORD S a.m-e.. t.t5 Alta.aha River ( FP (/ 0 1 g)flu.iyE' Field NIlMel": _-..,;::.-£.:......:f/(:...:...:. _--:-______.

i. I 9 a Tille: 9 f.f 'L -.3 J . COIipUUl" File HUllber:

"';;ij -r () I / I C y Collector(s): m 0 cmtr 11 (l .., ... Lat. -T"",,--:,,__-r-long. _.....,.... ___Chart _______________ _ if/' I /J IV' " -' 109. 'I ttNlmp fLp K __ 'YY) !::t:1S_ ___ _ TfIlMl Sank Ve<:jet4tlon Shading Bank Slope Sank Height I Water Substrate Organic Fallen Trees I Stumps I Logs Detritus YegetAtlon Water Temperature Depth Saaapled l Current l Oescr; ption of Waters I f I I' I ;Z Cr: I/U:,tc., Are.s Sepl" Are! Area TWo Area Three Area FOUl" /W1ln ' LfC) mUll A/" A s It;tkkp ...--------.--.. Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 IoU.".....,. 84 y - Species Oba.n" Alive $bells Altve Shells Altv. $bells Elltptio hopetonensts Wtptl0 dal"'iensh jillptl0 $hepardtana Elltptl0 spinosa Eillptfo leterlna Elltptl0 Un1oW.el"s Anodonta qlbbosa . . AnodonU Toxolas.. La_ps f \ is do labrlefo.,..is ?li!!J_X2?__ _Laapsflfs splendida .. Vi liaS! de 1!..!.!J!1!. y f TOTAL }49 ) I.(J;w,/l4,s-klcL. I It.; I , bUA../,( £ I C f4!.--1-J..." \ -' b",----..,.d t 1 , la IZ-Oata. Rei: \ I C , oi Ne t-I 1,. .e... {C( £3>.0\ r,i... 't v . ..,. "11 ....!"\ 3'+ I

Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Rive,. MUlSel Survey December 2. 1998 LAW p,.ojecl 12000-8-0178 APPENDIXB Altamaha River Freshwater Mussel Collections

\ 1993 and 1998 , , I f I I I ---- ---Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildl i fe Service, Dated November 10 , 2006 AHamaha River Mussel Survey December 1 , 1998 LAWProject 12000-8-0178 Table B.1: Summary of Freshwater Mussels Collected from the Altamaha River near Plant Hatch, Appling and Toombs County, Georgia, September 25-26, 1998 * . Location/River MUe 1IRM 122 21RM 121.9 31RM118.1 4IRM 117.8 5lRM 117.6 6IRM 117.3 7IRM 116.9 Live Shells Live Shells live SheDs live Shells Live SheDs Live SheDs live Shells Elliptio hopetonensis 64 19 0 0 16 0 1 0 6 0 11 0 1 Elliptio darien sis 66 2 1 0 3 0 0 0 4 0 11 0 1 Elliptio shepardiana 31 . 1 1 0 10 0 0 0 5 0 11 1 5 . ElJiptio spinosa 0 0 0 0 0 0 0 0 0 0 0 0 0 Elliptio icterina 137 0 46 2 4 0 0 0 31 0 0 0 1 Unlomerus carolinian us 0 0 1 0 0 0 0 0 2 0 0 0 0 Alasmidonla arcula 0 0 0 0 0 0 0 0 0 0 0 0 0 Pyganodon gibbosa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I UNerbackia Imbecillis 0 0 8 1 0 0 0 0 0 0 0 0 0 Lampsilis dolabraeformis 12 1 0 0 1 1 0 0 0 0 0 0 1 LampsUis splendida 1 0 12 14 5 1 0 0 47 3 4 0 10 Villosa de/umbis 0 0 . 1 0 1 0 0 0 1 0 0 0 1 Total Number 311 23 70 17 40 2 1 0 96 3 37 1 20 Effort (hours) 2 1..3 1.3 1 1.3 1.3 0.CPE (No. per hour effort) 156 11 .5 53.8 13.1 30.8 1.5 1 0 73.8 2.3 28.5 0.8 26.7 1.Prepared by: RGK 10/18198 Checked by: CWW 10130/98 . Page 1 of 3 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10 , 2006 -Altamaha River Mussel Survey Decembe r 1. 199B LAWProjecI12000-8-0178 Table B.1: Summary of Freshwater Mussels Collected from the Altamaha River near Plant Hatch, Appling and Toombs Georgia, September LocalionlRiver M il e S/RM 116.5 9IRM 116.4 10IRM 116.4 11IRM 116.4 12IRM 115.4 13IRM 115.4 14IRM 115.4 15IRM 115.1 Species Live Shells Live Shels Uve Shefts Live Shells Live Shels Live Shels Live Shens Live Shells Ellipt i o hopelonensis 10 0 . 12 0 5 2 12 0 0 15 2 0 64 0 0 10 Elliptio dariensis 2 0 13 0 1 0.5 12 0 0 20 2 0 28 0 0 9 Elliptio shepardiana 5 0 3 0 0 0 0 0 b 0 4 0 8 0 0 0 j i Elliplio spinosa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I 1 Elliptio ieterina 0 0 3 0 0 0 0 0 0 0 2 0 0 0 0 0 Uniomerus caro/inlanus 0 0 0 0 0 6 0 1 0 0 0 0 0 0 0 0 A/asmidonta arcu/a 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 Pyganodon gibbosa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Utterbackia Imbecillis 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Lampsilis dolabraeformis 9 0 10 0 2 . 1 2 0 0 1 11 7 57 0 2 Lampsilis splendida 4 0 1 1 1 0 0 0 0 1 20 1 2 0 0 0 I Vil/osa delumbis 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 Total Number 30 0 42 1 10 3.5 26 1 0 37 42 8 159 0 2 22 Effort (hours) 0.75 2 1 1 2 2 2 1 CPE (No. per hour effort) 40.0 0.0 21.0 0.5 10.0 3.5 26.0 1.0 0.0 8.0 21.0 8.0 79.5 0.0 2.0 22.0 Prepared by: RGK 10/18198 Checked by: CINW 10/30/98 Page 2 of 3 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 AI/amaha River Mussel Survey December 1. 1998 LA W Project 12000-8-0178 Table B.1: Summary of Freshwater Mussels Collected from the Altamaha River near Plant Hatch, Appling and Toombs County, Georgia, September 25*26,1998. Location/River Mile 16/RM 114.7 17IRM 114.5 18IRM 113.8 19IRM 113.7 20IRM 110.5 21/RM 110.5 221RM 109.9 23JRM Species Live SheDs Live Shells Uve Shells live Shells Live Shells Uve SheDs live SheWs Live Elliptio hope/onensis 0 0 0 0 11 0 0 1 22 0 0 0 0 0 105 Ellipfio darien sis 0 0 0 0 4 0 0 0 2 0 0 0 0 0 9 Elllplio sheperdiana 2 0 0 0 5 0 0 0 15 0 0 0 0 0 7 Elliptio spinosa 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Elliptio ic/erina 2 0 0 0 1 0 0 0 0 0 0 0 0 0 5 Uniomerus carolinianus 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 Aiasmidon/a arcula 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Pyganodon gibbosa 0 0 1 0 0 0 0 0 0 0 0 0 3* 0 0 Utferbackia imbeci/lis 0 0 2 0 0 0 0 0 0 0 4 0 4 0 1 Lampsilis dolabraeformis 2 0 0 0 0 0 1 0 11 0 0 0 0 0 17 Lampsilis splendida 2 1 4 () 45 1 0 0 5 0 10 0 17 0 3 Villosa delumbis 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Number 8 1 8 0 67 1 1 1 55 0 15 0 24 0 149 Effort (hours) 1 0.75 1.33 0.75 0.75 0.75 1 CPE (No.per hour effort) 8.0 1.0 10.7 0.0 50.4 1.3 1.3 73.3 0.0 20.0 0.0 24.0 0.0 74.5 0.5 Prepared by: RGK 10/18/98 Checked by: CWIN 10130198 Page 3 of3 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10,2006 Altamaha River Mussel Survey December " 1998 LAW Project 12000-8-0178 Table B.2: Summary of Freshwater Mussels Collected from the Altamaha River near Ptant Hatch, AppIJng Toombs County, Georgia, LocationIRiver Mile 1IRM 122 2JRM 121.9 3/RM 118.1 o4IRM 117.8 5IRM 117.6 6IRM 117.3 7IRM 116.9 j Species(1) Live Shells Live Shels Live Shels Live Shells Live SheDs Live SheDs Live Shells Elliptio hopetonensis 301 0 2 3 Not 1 0 89 2 4 2 Not Elliptio darienSJs 36 0 1 0 Sampled in 0 0 2 0 2 0 Sampled in Elliptio shepardiana 31 0 0 0 1993 by Dr. 0 0 7 0 2 0 1993 by Dr. Elliptio spinosa 0 0 0 0 Keter! 0 0 0 0 0 0 Keterl Elliptio icterina 63 0 0 2 0 0 10 0 0 0 Uniomerus carolinianus 0 0 0 2 0 0 2 0 0 0 Alasmidonta arcula 1 0 0 0 0 0 15 0 1 0 Pyganodon gibbosa 0 0 0 0 0 0 0 0 0 0 I Utteroackia imbecillis 0 0 0 4 0 0 0 0 0 0 j Lampsilis do/abraeformis 54 . 0 11 2 1 0 3 0 4 0 Lampsilis splendida 7 0 9 2 0 0 60 5 1 0 j Villosa delumb i s 0 0 0 0 0 0 0 0 0 0 Total Number 493 0 23 15 2 0 188 7 14 2 Effort (hours) 2 0.7 0.42 0.85 0.5 CPE (No.per hour effort) 246.5 0.0 32.9 21.4 __ 4.8 221 8.2 28.0 4.0 I Note: (1) Species Ust excludes two unidentifed Elliptio specimensPrepared by: RGK10/18/98 Checked by: CWW 10130/9a Page 1 of 3

,. Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service, Dated November 10, 2006 Altamaha River Mussel Survey December 1. 1998 LAW Project '12000-8-0178 Table B.2: Summary ot Freshwater Mussels Collected trom the Altamaha River near Plant Hatch, Appling Toombs County, Georgia, July, LocationlRiver Mile 8IRM 116.5 9IRM 116.4 10IRM 116.4 11IRM 115.4 12JRM 115.4 13IRM 115.1 14IRM 114.7 Species(l)

Live Shells Live Shells LIve Shells live Shells Live Shells Live Shells Live Shells Elliptio hopetonensis Not Not 16 30 Not 26 11 Not Not Elliptio dariensis Sampled in Sampled in 40 20 Sampled in 4 1 Sampled In Sampled in Elliptio sheparciiane 1993 by Dr. 1993 by Dr. 1 7 1993 by Dr. 16 ' 0 1993 by Dr. 1993 by Dr. Elliptio spinosa Keferl Keferl 1 1 Keferl 0 0 Keferl Keferl Elliptio ictedne 0 1 1 0 Uniomerus carolinienus 0 0 l' 0 Alasmidonta arcula 0 0 0 0 Pyganodon gibbosa 0 0 0 0 Ulterbackia imbecillis 0 0 0 0 Lempsi/is dolabraeformis 31 4 17 15 Lampsilis splendida 2 1 14 1 Villosa delumbis 0 0 1 0 Total Number 91 64 80 28 Effort (hours) 1.3 1.58 CPE (No.per hour effort) 70.0 49.2 .50.6 17.7 . I -Note: (1) Species fist excludes two unidentifed Elliptio specimensPrepared by: RGK 10118198 Checked by: CWW 10130/98 , Page 2 of3 Enclosure to NL-13-1528 SNC Letter to U. S. Fish and Wildlife Service , Dated November 10, 2006 ---. Altamaha River Mussel Survey December 1 ,. 1998 LAW Project 12000-8-0178 Table B.2: Summary of Freshwater Mussels Collected from the A1tamaha River near Plant Hatch, Appling and Toombs County, Georgia, July, 1993. LocationIRiver MUe 15IRM 114.5 161RM 113.8 17IRM 113.7 1B1RM 110.5 19IRM 110.5 20IRM 109.5 21IRM 109.9 Specles(1) Live Shens Live Shells Live Shells Live Shells Live Shells Live Shells Live Shens Efliptio hopetonensis 0 0 0 0 42 27 39 0 22 0 12 0 Not Elliptio dariensis 0 0 1 0 6 0 2 0 3 0 3 0 Sampled In Elliptio shepard/ana 0 0 0 0 11 0 14 0 5 0 8 0 1993 by Dr. Eli/plio spinosa 0 0 0 0 0 3 0 0 3 0 0 0 Kefell Elliptlo /cterina 0 0 0 0 1 0 0 0 0 0 0 0 Uniomarus carolin/enus 4 0 0 ' 0 2 1 0 0 0 0 0 0 A/asm/donta arcula 0 0 0 0 0 0 1 0 0 0 3 0 Pyganodon gibbosa 5 0 2 0 3 3 0 0 4 0 3 1 U/terbacJda imbecillis 4 0 3 0 3 15 0 0 4 0 0 0 Lampsi/is dolabraeformls 0 0 0 0 4 13 2 0 8 0 6 0 Lampsilis splendida 8 0 20 0 12 18 30 0 15 0 2 0 Villoss de/umbis 0 0 0 0 0 0 0 0 0 0 0 0 T cital Number 21 0 26 0 84 80 88 0 64 0 37 1 Effort (hours) 0.3 1.33 0.42 0.33 1.42 0.25 CPE(No.perhoureffort) 70 0.0 22.6 0.8 200.0 190.4 266.7 0.0 45.0 0.0 148.0 5.0 Note: (1) Species fist exdudes two unidentifed Elliptio specimensPrepared by: RGK Checked by: CWW Page 3 of3}}

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