Fish Passage Site 20401286

Coordinates (dec. deg.): 61.52482°, -149.57159°
Legal Description: S017N002W35
Region: South Central
Road Name: Trapline Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10300-2012
Stream Name: Cottonwood Slough

Elevation:

Site Comments: This culvert is under the road. It's at a right anlgle to #134 - 15' away from #134

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 MSCS1-CT135

Observers: Doug Hill, Joe Conner, Sharie Chrisco

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating: Gray
 
Length(ft): 50.0
Inlet Type: Projecting
Outlet Type:
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft):0.2 0.6
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.78
Culvert Gradient:
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 48.0 6.20
Upstream ordinary high water 6.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top 1 93.27
Inlet Culvert Top 1 93.35
D/S Thalweg 0.00 48.0 89.53
Outlet Invert 1 48.00 0.0 89.62
Outlet Thalweg 1 48.00 0.0 89.62
Road Elev 73.00 96.21
Road Elev 73.00 96.56
Inlet Culvert Invert 1 98.00 0.0 90.39
Inlet Thalweg 1 98.00 0.0 90.39
U/S Thalweg 104.40 6.4 89.93

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