Lake Tecumseh Weir Project
Overview - Weir - Boat Portage - Environmental Monitoring - Studies - Construction
Environmental Monitoring - Water Quality
U.S. Fish and Wildlife Service Water Quality Reference Data recorded on September 30, 2008
Conditions: Calm. Light Winds. Little or no runoff at each site.
| Site |
Salinity |
DO |
Temp (°C) |
pH |
Conductivity |
Asheville Bridge Canal |
2.7 |
7.8 |
24.4 |
7.1 |
4.9 |
| Lake Tecumseh |
1.5 |
6.1 |
24.2 |
7.1 |
2.9 |
| Blackgut |
0.2 |
1.4 |
21.1 |
5.6 |
0.4 |
| Lago Mar Marsh |
0.8 |
4.1 |
23.9 |
6.4 |
1.6 |
U.S. Fish and Wildlife Service Water Quality Storm Discharge Monitoring Data North Bay/Back Bay Watershed, November 5, 2008
Conditions: Raining. Winds N-NW 25-30 mph. 59° Farenheit. Runoff rapidly flowing at each site.
| Site |
Temp (C) |
DO |
pH |
Turbidity |
Salinity (ppt) |
| Ocean Lakes at Dam Neck Road |
15.8 |
12 |
6.5 |
17 |
0.3 |
| Redwing Lake at Dam Neck Road |
15.5 |
10.2 |
6.8 |
7 |
0.3 |
| Lago Mar outfall above Tecumseh |
14.6 |
12.1 |
6.6 |
7 |
0.1 |
| Asheville Brideg Canal above Tecumseh |
15.2 |
11.5 |
6.4 |
4-7 |
1.3 |
| Lake Tecumseh outfall into Asheville Bridge Canal |
15.5 |
9.6 |
6.5 |
48-67 |
2.0 |
| Heritage Park outfall on Sandbridge Road |
15.1 |
9.8 |
6.5 |
38-74 |
0.1 |
| Hells Point Creek at Sandbridge Road |
15.3 |
10.1 |
6.6 |
0-2 |
0.1 |
| Asheville Bridge Canal at Sandbridge Road |
15.2 |
11 |
6.5 |
see note 6 below |
1.9 |
| Blackgut Marsh at Sandbridge Road (reference) |
14.8 |
8 |
6 |
|
0.1 |
| Notes |
|
State Std = 6 |
Neutral = 7 |
|
bay average = 2 ppt |
Notes:
- List is arranged by distance from the bay. Those starting on the left are farthest, those on the right closest.
- Monitoring sites include the stormwater pond outfalls from three subdivisions (Ocean Lakes, Lago Mar, and Heritage Park) that discharge to Asheville Bridge Canal, Redwing Lake, Lake Tecumseh, Asheville Bridge Canal above and below Lake Tecumseh, and Blackgut Marsh. Blackgut serves as a non-tidal, non-channelized reference site.
- Samples were recorded between 11:30 am and 4:00 pm. Lake Tecumseh was recorded at the beginning and end of sampling event. Turbidity readings for Lake Tecumseh were highest during the 11:30 am event.
- Hell point Creek at Sandbridge Road was flwoing north into Asheville Bridge Canal rather than south to the bay.
- The rading for Asheville Bridge Canal at Sandbridge Road includes runoff from all sites sampled except Blackgut.
- NTU/Visibility conversion: 0 ntu = 5 feet, 25 ntu = 10-12 inches, 60 ntu = 5 inches
Credit: Aerial photograph by U.S. Department of Agriculture
U.S. Fish and Wildlife Service Water Quality Data Recorded December 23, 2008
Conditions: Calm. Light Winds. Air temperature in upper 40s.Little or no runoff at each site.
| Site |
Temp (C) |
DO (mg/L) |
pH |
Turbidity (ntu) |
Salinity (ppt) |
| Ocean Lakes outfall |
5.19 |
12.03 |
6.84 |
0.00 |
0.14 |
| Redwing Canal at Dam Neck |
3.43 |
12.60 |
6.93 |
6.70 |
0.07 |
| Lake Tecumseh at HRSD |
6.75 |
12.20 |
6.82 |
0.00 |
0.18 |
| Lotus Garden |
7.24 |
10.40 |
6.10 |
0.00 |
0.10 |
| Sandbridge Road bridge |
3.19 |
13.35 |
7.32 |
5.60 |
0.21 |
| Blackgut outflow |
4.73 |
7.53 |
5.73 |
0.20 |
0.13 |
Christopher Newport University Water Quality Reference Data Recorded October 21, 2008
Conditions: Calm. Light Winds. Air temperature in lower 60s. Little or no runoff at each site.
Location |
D.O |
Temp (°C) |
pH |
Salinity (ppt) |
Turbidity |
Depth (m) |
1 |
9.54 |
9.43 |
6.8 |
2.73 |
2.99 |
0.52 |
2 |
13.79 |
9.14 |
7.83 |
2.73 |
3.52 |
0.88 |
3 |
14.22 |
9.23 |
7.97 |
2.77 |
3.4 |
0.88 |
4 |
12.62 |
8.81 |
7.84 |
1.71 |
1.1 |
0.98 |
5 |
14.1 |
9.35 |
7.48 |
2.05 |
4.38 |
0.36 |
6 |
15.1 |
10.21 |
7.49 |
2.77 |
4.12 |
0.52 |
7 |
11.7/15.55 |
10.22 |
7.6 |
2.75 |
4.75 |
0.3 |
8 |
17.1/11.83 |
9.85 |
7.62 |
2.74 |
4.5 |
0.58 |
9 |
16.5/11.9 |
9.5 |
7.67 |
2.66 |
3.45 |
0.76 |
10 |
14.14/9.89 |
10.85 |
7.6 |
2.03 |
3.5 |
1.77 |
11 |
17.1/10.3 |
10.3 |
7.42 |
1.45 |
N/A |
0.15 |
12 |
11.08 |
10.11 |
7.29 |
1.63 |
N/A |
0.15 |
13 |
12.1 |
9.31 |
7.44 |
2.6 |
4.2 |
1.2 |
14 |
12.08 |
9.77 |
7.41 |
3.69 |
4.6 |
1.2 |
Credit: Aerial Photograph by U.S. Department of Agriculture
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