Fish Passage Site 20401301
Coordinates (dec. deg.): 61.53214°, -149.52786°
Legal Description: S017N001W30
Region: South Central
Road Name: West Riverdell Drive
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10300
Stream Name: Cottonwood Creek
Site Comments: None
arrow to the right of the survey date below to choose a different report for this site.
Project Supervisor: Kim Clark, ADFG
— Anchorage, AK
Observers: Kim Clark, Michael Mazzacavallo
Overall Fish Passage Rating:
Step Pools: No
Construction Year: 2016
Comments: Channel splits into multiple stable channels below the outlet. Steam pipe on right bank is broken. Overflow pipe on river left.
|ID: 1||Structure Type: Box culvert (Structural steel plate)||Fish Passage Rating:|
Comments: Overflow pipe is present. No water flowing through at time of site visit. Pipe graident in designs 0.90%, Water surface gradient 0.50%, Invert gradient 1.3%.
|Stream Width Type||Distance From
|Upstream ordinary high water||86.0||26.90|
|Upstream ordinary high water||108.0||17.24|
|Upstream ordinary high water||127.0||16.84|
|Road Elev (Road surface)||102.86|
|D/S Thalweg (top of where channel starts braiding)||0.00||94.17|
|D/S Water Surface Elev||0.00||94.80|
|D/S Thalweg (bottom of rock weir)||15.50||94.18|
|D/S Water Surface Elev||15.50||95.02|
|Outlet Culvert Top||24.30||100.39|
|D/S Water Surface Elev||24.30||95.41|
|D/S Thalweg (top of rock weir)||25.00||94.34|
|D/S Water Surface Elev||25.00||95.37|
|Inlet Culvert Top||99.70||100.65|
|Inlet Culvert Invert||99.70||95.15|
|U/S Water Surface Elev||99.70||95.74|
|U/S Water Surface Elev||102.70||95.95|
|U/S Water Surface Elev||129.70||95.11|
- 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.
No fish observations occurred during this survey.
Questions or comments about this report can be directed to email@example.com