1. Chowan River TMDL Development Nottoway Area 08/31/04

2. TMDL Development Historical data analysis Source assessment Physical Source Identification Bacterial source tracking Modeling Allocation

3. Fecal Coliform Impairments Impaired Stream Segments in the Nottoway River watershed

4. Water Quality Data Analysis Location of VADEQ water quality monitoring stations used for TMDL assessment in the Nottoway River watershed

5. Water Quality Data Analysis Fecal Coliform Concentrations

6. Water Quality Data Analysis Location of BST water quality monitoring stations in the Nottoway River watershed

7. Water Quality Data Analysis E. coli concentrations

8. Water Quality Data Analysis Statistical Analysis of Water Quality Measurements versus Precipitation to determine the relationship between rainfall and water quality Summary of the Mood Median Test on mean monthly precipitation at station 444101 (p=0.013).

9. Source Assessment Identification of Sources DEQ/DCR/Locality records VPDES U.S. Census Ag Census Habitat Analysis Stakeholders, local knowledge – improve estimates BST Delivery Mechanisms Direct Land-applied Exported Out of Watershed Temporal Variation Migration Patterns/Resident Populations Import/Export of agricultural/STP waste?

10. Permitted Discharges

11. Indicates poultry facility with some animals outside watershed boundary ** Farm no longer active ND – no data, facility not required to submit monitoring data NA – Not available

12. Human (2004) ImpairmentPopulation Housing Units (HU) HU with Sewer HU with Septic HU with Other Beaverpond Creek Big Hounds Creek 254 2,058 122 983 4 484 113 461 4 39 Little Nottoway River 4,8581,6344191,14570 Nottoway River 2,58862318641917

13. Human Sanitary sewer Overflows - reported to DEQ Exfiltration – rate from literature Failing septic systems Rate based on age of house Straight pipes U.S. Census and VDH consultation

14. Pets (2004) ImpairmentDogsCats Beaverpond Creek Big Hounds Creek Little Nottoway River 65 525 873 73 588 977 Nottoway River 332372

15. Livestock - 1997 ImpairmentBeefDairyHorseSheep Beaverpond Creek 137311311 Big Hounds Creek 21513105 Little Nottoway River 2,05833348187 Nottoway River 509681817

16. Wildlife Population ImpairmentDeerTurkeyGooseDuckMuskratRaccoonBeaver Beaverpond Creek Big Hounds Creek 123 268 32 70 21 41 39 3,238 7,788 443 1,086 44 142 Little Nottoway River Nottoway River 1,240 888 241 215 129 112 122 107 21,183 14,592 3,386 2,952 424 388

17. Bacterial Source Tracking Location of BST stations in the Nottoway River watershed

18. Modeling Hydrologic model Runoff model HSPF Water Quality model Source Assessment Results HSPF Model Calibration and Validation Based on data availability, period of interest

19. Modeling

20. VADEQ Station 5ANTW155.06 and USGS Station #02044500

21. Modeling VADEQ Station 5ALNT004.68 and USGS Station #02044500

22. Hydrologic Calibration

24. Modeling Source Loads Source Characterization Fecal production / densities / distribution Delivery Mechanisms Direct Land-applied Exported Out of Watershed Temporal Variation

25. Load Characteristics

26. Model Load Characterization “Direct to Stream” Loads Point Sources: Design Flow/Fecal Discharge Overflows: Reported overflow volume Characterize Volume and Duration Animal/Human: direct deposition, straight pipes “Land Applied” Loads Wildlife, Livestock, Pets Transported to stream during runoff producing event Use measured waste characteristics Compute die-off in between events Application timing

27. Wildlife

28. Livestock Average percentage of collected livestock waste applied throughout year

29. Livestock Average time dairy milking cows spend in different areas per day

30. Livestock Average time dry cows and replacement heifers spend in different areas per day

31. Livestock Average time beef cows not confined in feedlots spend in areas per day

32. Allocation Quantify Current Source Conditions Run model with present-day sources Develop reduction scenarios that will meet water quality standards 100% reduction in straight pipes, 25% reduction in failed septic systems 100% reduction in straight pipes, 50% reduction in livestock direct deposition Allocate loads to each source

33. Livestock - 2002 ImpairmentBeefDairyHorseSheepPoultry* Beaverpond Creek 145304114- Big Hounds Creek 3380314- Little Nottoway River 1,95536514420337,680 Nottoway River 57540598118,000 * Must get information regarding import/export of poultry litter in watershed.

34. Allocation