Fish Passage Site 20403899

Coordinates (dec. deg.): 61.47998°, -148.88979°
Legal Description: S016N003E15
Region: South Central
Road Name: Knik River Road

Datum: NAD83
Quad Name / ITM: Anchorage B-6
AWC Stream #: 247-50-10200-2106
Stream Name: Unnamed


Site Comments: None

Survey Date: Sep 15, 2016


Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman, Gillian O'Doherty

Overall Fish Passage Rating: Black

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Comments: Site added from 2016 Sampling Unmapped Streams in the MSB project. Stream has been diverted from crossing 20400598. 20400598 dry. There is another perched culvert upstream from this site. Coho salmon captured DS only Dolly Varden char captured upstream. Local property own says he'd only seen Dolly Varden upstream of the road.

Culvert Measurements

ID: 1 Structure Type: Oval (Corrugated steel) Fish Passage Rating: Green
Length(ft): 95.44
Inlet Type: Flared Inlet
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 6.0
Sedimentation At Inlet: No
Inlet Substrate:
Outlet Substrate:
Width(ft):4.5 5.5
Height(ft):3.2 3.65
Apron Length(ft):6.0
Water Depth(ft): 0.72
Rustline Height(ft):2.6
Substrate Depth(ft):0.2 0.2
Backwatered?: Maybe
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.17%
Max Slope:
Max Slope Length:

Comments: Apron on outlet has fallen off and is rusted/ dilapidated. Apron on the inlet is also disconnected backwatering at outlet likley due to amount of debris blocking flow. Invert at both outlet and inlet was completely rusted out, aprons were a different size radius than the pipe. Culvert in very bad shape in general.

Stream Measurements

Stream SubstratesUpstreamDownstream
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.


No elevation data available.

Fish Sampling Efforts

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to