Fish Passage Site 20400597
Coordinates (dec. deg.): 61.48856°, -148.90274°
Legal Description: S016N003E10
Region: South Central
Road Name: Knik River Road
Datum: NAD83
Quad Name / ITM: Anchorage B-6
AWC Stream #: 247-50-10200-2096
Stream Name: Unnamed
Elevation:
Site Comments: None
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Survey MSB23-MS008
Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game
— Anchorage, AK
Observers: Kevin Keith, Kat Leavitt, Beth Evers
Overall Fish Passage Rating:
Tidal: No
Backwatered: No
Step Pools: No
Construction Year:
Site Observations:
- Culvert gradient red
- Culvert sagging in middle
Comments: Downstream channel potentially unnatural, looks altered by humans.
Culvert Measurements
ID: 1 | Structure Type: Pipe-arch (Corrugated steel) | Fish Passage Rating: | ||||||||||||||||||||||||||||||||||||||||||
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Comments: Compound gradient in culvert #1. |
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Culvert Observations:
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ID: 2 | Structure Type: Pipe-arch (Corrugated steel) | Fish Passage Rating: | |||||||||||||||||||||||||||||||||||||||||
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Comments: Culvert #2 has a inlet perch and is a drainage overflow pipe, not rated for fish passage. |
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Culvert Observations:
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Stream Measurements
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Stream Width Type | Distance From Crossing (ft) |
Stream Width (ft) |
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Upstream ordinary high water | 30.0 | 8.00 |
Upstream ordinary high water | 56.0 | 9.30 |
Upstream ordinary high water | 72.0 | 10.00 |
Elevations
Locator ID | Culvert Number |
River Distance (ft)1 |
Distance From Crossing (ft)2 |
Relative Elevation (ft) |
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Outlet Invert | 2 | 89.32 | ||
Inlet Culvert Invert | 2 | 90.58 | ||
U/S Thalweg (Inlet Apron Top) | 1 | 91.23 | ||
U/S Thalweg (Inlet Apron Bottom) | 1 | 91.62 | ||
Outlet Culvert Top | 2 | 93.05 | ||
U/S Water Surface Elev (Inlet Apron WS) | 92.11 | |||
U/S Thalweg (sedimentation infront of inlet) | 2 | 92.39 | ||
Inlet Culvert Top | 2 | 95.81 | ||
Road Elev | 98.24 | |||
D/S Thalweg | 0.00 | 86.07 | ||
D/S Water Surface Elev | 0.00 | 86.31 | ||
D/S Thalweg | 24.60 | 86.50 | ||
D/S Water Surface Elev | 24.60 | 87.09 | ||
D/S Thalweg | 45.00 | 87.36 | ||
D/S Water Surface Elev | 45.00 | 87.82 | ||
D/S Thalweg | 68.00 | 88.16 | ||
D/S Water Surface Elev | 68.00 | 88.68 | ||
D/S Water Surface Elev | 1 | 100.00 | 89.49 | |
Outlet Invert | 1 | 100.00 | 88.67 | |
Outlet Culvert Top | 1 | 100.00 | 93.20 | |
Inlet Culvert Top | 1 | 160.70 | 96.56 | |
Inlet Culvert Invert | 1 | 160.70 | 91.16 | |
U/S Water Surface Elev (Inlet WS) | 1 | 160.70 | 91.76 | |
U/S Thalweg | 180.70 | 91.64 | ||
U/S Water Surface Elev | 180.70 | 92.53 | ||
U/S Water Surface Elev | 196.70 | 93.31 | ||
U/S Thalweg | 196.70 | 92.43 | ||
U/S Water Surface Elev | 227.70 | 94.79 | ||
U/S Thalweg | 227.70 | 94.29 | ||
U/S Thalweg | 237.70 | 94.57 | ||
U/S Water Surface Elev | 237.70 | 95.25 |
Notes:
- River distance is measured continuously throughout the survey reach along the thalweg of the stream.
- Measured from each end of the crossing along the thalweg of the stream.
Fish Sampling Efforts
No fish sampling occurred during this survey.
Fish Observations
No fish observations occurred during this survey.
Photos
No photos available.
Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov