Fish Passage Site 20303514
Coordinates (dec. deg.): 60.97427°, -149.09608°
Legal Description: S010N002E09
Region: South Central
Road Name: Arlberg Avenue
Quad Name / ITM: Seward D-6
AWC Stream #: 247-60-10250-2018-3130
Stream Name: Unnamed
Site Comments: Site on new extention of Arlberg Ave. Stream has confluence with a slough about 70 feet below culvert outlet. 20303515 is just up the road and is a large pipe arch..
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Project Supervisor: Kim Clark, ADFG
— Anchorage, AK
Observers: Kim Clark, Michael Mazzacavallo
Overall Fish Passage Rating:
Step Pools: No
Construction Year: 2016
Comments: Willow stakes look good. Erosion on upstream bank opposite of rootwads, channel has downcut somewhat. Some survey stakes still present.
|ID: 1||Structure Type: Box culvert (Structural aluminum plate)||Fish Passage Rating:|
Comments: as-built culvert dimensions are 13.1 ft by 8.25ft which was used to calculate substrate depth. Passage gradient using Water surface gradient = 2.16%.
|Stream Width Type||Distance From
|Upstream ordinary high water||96.0||7.40|
|Upstream ordinary high water||107.0||7.90|
|Upstream ordinary high water||117.0||7.30|
|D/S Water Surface Elev||0.00||93.27|
|D/S Water Surface Elev||15.50||93.57|
|Outlet Culvert Top||70.00||100.51|
|D/S Water Surface Elev||70.00||95.16|
|Inlet Culvert Invert||155.90||96.21|
|U/S Water Surface Elev||155.90||97.02|
|Inlet Culvert Top||155.90||102.75|
|U/S Water Surface Elev||166.40||97.37|
|U/S Water Surface Elev||184.50||97.98|
|U/S Water Surface Elev||187.00||98.01|
|U/S Water Surface Elev||205.60||98.89|
|U/S Water Surface Elev||209.29||99.41|
|U/S Water Surface Elev||220.40||99.88|
- 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.
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