Water Quality Report
Water monitoring efforts for 2022 continue, in accordance with our 2022 MOA. In the fall we will continue sampling of the Pigg River, using the 2022 Pigg River Project Plan.
Current Water Quality health of LVL:
1) No overall health concerns for recreational use.
2) Two threats to the lake are evident and are being carefully monitored. These are:
a) low dissolved oxygen in the tailwaters from Smith Mountain Lake Dam
b) poor water quality of the Pigg River
Low Dissolved Oxygen:
Appalachian Power Company (APCo) sent LVL Association the “SMITH MOUNTAIN HYDROELECTRIC PROJECT July 2022 Monthly Water Quality Monitoring Report ES Project No.: 16402 Dated: 9/1/2022” in accordance with the Water Quality Monitoring Plan for the Smith Mountain Project. The July 2022 Monthly Water Quality Report results show data from Instantaneous DO values ranged from 4.3 mg/L to 7.3 mg/L, with an average of 5.6 mg/L. Daily average DO values ranged from 4.9 mg/L to 6.4 mg/L, with a median daily average of 5.6 mg/L. Instantaneous readings were below 5.0 mg/l from 19-31 Jul 2022, with daily average readings below 5.0 mg/l on 25-26 Jul and 28-29 Jul. This is consistent with previous year observations.
APCO has initiated Phase 3 of their Feasibility Study, which will:
1) evaluate the practicality, effectiveness and cost efficiency of methods that increase dissolved oxygen in the tailrace without causing other water quality issues (e.g., increased water temperature).
2) Determine life cycle costs and decide whether to act, or not.
3) The completion of the Feasibility Plan is timely as Appalachian’s VDEQ Virginia Water Protection Individual Permit No 08-0572 (Permit) expires on March 31, 2025. It is Appalachian’s intent to file for a new permit at least one year prior to the expiration date.
No preliminary insights have been provided by APCo.
The LVL WQ Committee will continue to work with APCo, TLAC, DEQ, DWR, and other regulatory agencies to achieve satisfactory DO levels in Leesville Lake.
2022 Pigg River Study
Tom Shahady, Tony Capucho and Charlie Hamilton met on 13 Sep to finalize the Pigg River sampling plan for September and October 2022. Bacterial Source Tracking (BST) will be conducted (3 host markers per sample) on 9 water samples focusing on the following analyses: Human-HF183 ddPCR, Cow-CowM2(EPA1), and Ruminant_Rum2Bac.
Our 2022 Pigg River Study Objectives are:
(1) Closely study the area between Chestnut Hill and Colonial Turnpike (the area implicated as contaminated with sediment from the Power Dam removal) to quantify the extent to which the sediment in this area impacts bacterial/nutrient/sediment water quality in the Pigg River.
(2) Identify sources of bacterial contamination by identifying the bacterial content of water during both low flow and storm events.
(3) Quantify the impact of this sediment by conducting sediment disturbance experiments (water collected before and after sediment disturbance) in conjunction with bacterial source tracking to specifically characterize how this underlying sediment contributes to bacteria in the water.
(4) Evaluate the efficacy of E. coli / Enterococci ratios in determining the source of bacterial contamination. We need to identify this impact to suggest management of sediment as it impacts water quality to Leesville Lake and continues its migration into the lake.
Special thanks to the LVL WQ Committee: Debbie Oliver, Kathleen Giangi, Dave Waterman, and Tony Capuco for their continuing hard work.
Charlie Hamilton
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