Fish Passage Site 20501238

Coordinates (dec. deg.): 61.75817°, -150.10738°
Legal Description: S019N005W12
Region: South Central
Road Name: Willow Creek Parkway

Datum: WGS84
Quad Name / ITM: Tyonek D-1
AWC Stream #: 247-41-10200-2120-3010
Stream Name: Shirley Lake outlet

Elevation:

Site Comments: Creek drains Shirley Lake into Willow Creek

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 MSB09-WCP01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient gray
  3. Compound gradient in pipe

Comments: Creek drains Shirley Lake into Willow Creek; TWC>inverts, but WS drops 0.23' from in to out. CG in pipe by subs - Not BW.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 117.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 38.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: None
InletOutlet
Width(ft):4.9 5.0
Height(ft):3.8 5.0
Apron Length(ft):
Water Depth(ft): 1.58
Rustline Height(ft):2.3
Substrate Depth(ft):1.2 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.47
Culvert Gradient: 0.70%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray
  3. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 70.0 10.00
Upstream ordinary high water 114.0 11.50
Upstream ordinary high water 150.0 10.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) 1 0.00 83.0 95.87
D/S Water Surface Elev 1 0.00 83.0 96.38
D/S Water Surface Elev (@TWC) 1 36.00 47.0 96.79
D/S Tailcrest or 1st Thalweg 1 36.00 47.0 96.29
D/S Thalweg 1 47.00 36.0 95.11
D/S Thalweg 1 78.00 5.0 94.92
Outlet Invert 1 83.00 0.0 95.23
Outlet Pool Water Elev 1 83.00 96.81
Road Elev 1 141.50 115.07
U/S Headwater 1 200.90 97.04
Inlet Culvert Invert 1 200.90 0.0 96.05
U/S Water Surface Elev (@GP) 1 211.40 10.5 97.19
U/S Grade Ctrl (Thalweg) 1 211.40 10.5 96.38

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