Fish Passage Site 20403788

Coordinates (dec. deg.): 61.63025°, -149.32028°
Legal Description: S018N001E20
Region: South Central
Road Name: Cedarwood Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Unnamed tributary to Upper Dry Lake

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 UPD20-CDR01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Gillian O'Doherty, Kim Clark, Michael Mazzacavallo

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Comments: Straw erosion control wattles present at inlet and outlet. There is a mixture of riffles, glides, and bends upstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Green
 
Length(ft): 80.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.2 5.15
Height(ft):2.96 3.33
Apron Length(ft):
Water Depth(ft):1.18
Rustline Height(ft):
Substrate Depth(ft): 1.66
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.66
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.75
Culvert Gradient: 1.34%
Max Slope:
Max Slope Length:
 

Comments: Inlet height is measured on top of the substrate.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):1.31
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) 0.00 96.77
D/S Water Surface Elev 0.00 97.58
Outlet Invert 16.00 96.38
D/S Water Surface Elev 16.00 97.56
Outlet Culvert Top 16.00 100.00
Inlet Culvert Invert 96.50 98.17
U/S Water Surface Elev 96.50 98.45
Inlet Culvert Top 96.50 101.08
U/S Thalweg 116.50 97.90
U/S Water Surface Elev 116.50 98.44

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