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

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey CRB02-KR280

Observers: Dean Beers, James Laurence, James Laurence

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: Photos from the 9/15/16 Sampling Unmapped Streams in the MSB site visit and fish sampling added. Outlets are no longer perched. Coho salmon, one sockeye salmon, and Dolly Varden char captured downstream, only Dolly Varden char captured upstream. Site is still Red from culvert gradient.

Culvert Measurements

ID: 1 Structure Type:N/A Fish Passage Rating:
 
Length(ft): 61.0
Inlet Type:
Outlet Type:
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):6.5
Height(ft):5.6
Apron Length(ft):
Water Depth(ft): 0.1
Rustline Height(ft):0.1
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.6
Culvert Gradient: 5.43%
Max Slope:
Max Slope Length:
ID: 2 Structure Type:N/A Fish Passage Rating:
 
Length(ft): 61.0
Inlet Type:
Outlet Type:
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):6.4
Height(ft):5.2
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):0.25
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.6
Culvert Gradient: 5.11%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 28.00
Upstream ordinary high water 75.0 17.00
Upstream ordinary high water 100.0 20.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 83.69
Outlet Thalweg 1 0.00 0.0 83.94
Outlet Invert 2 0.00 0.0 84.44
Outlet Invert 1 0.00 0.0 84.62
Outlet Thalweg 2 0.00 0.0 83.20
Inlet Culvert Invert 2 61.00 0.0 87.56
Inlet Thalweg 2 61.00 0.0 87.57
Inlet Culvert Invert 1 61.00 0.0 87.93
Inlet Thalweg 1 61.00 0.0 87.93

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. 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.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov