Fish Passage Site 20401352

Coordinates (dec. deg.): 61.57486°, -149.29478°
Legal Description: S017N001E09
Region: South Central
Road Name: Hyer Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #: 247-50-10260-2019
Stream Name: Wasilla Creek

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 MSB23-MS122

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Kat Leavitt, Beth Evers, Amy LaBarre

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. Mechanical damage or joints parting

Comments: Scour pools on either side of inlet and outlet. Length of pipe measured, did not include mitered end. Swift water conditions made it hard to stand and measure total pipe length.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 45.9
Inlet Type: Projecting
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):9.9 10.3
Height(ft):7.0 7.0
Apron Length(ft):0.0 0.0
Water Depth(ft):0.0 1.54
Rustline Height(ft):2.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.6
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.43
Culvert Gradient: 0.63%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient gray
  3. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:SandSand
Stream Slope(deg.):0.79
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 57.0 24.80
Upstream ordinary high water 70.0 21.70
Upstream ordinary high water 87.0 20.50
Upstream ordinary high water 107.0 24.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.57
D/S Thalweg 0.00 91.79
D/S Water Surface Elev 0.00 92.43
D/S Thalweg 25.00 91.85
D/S Water Surface Elev 25.00 92.84
D/S Thalweg 97.00 90.28
D/S Water Surface Elev 97.00 92.70
D/S Thalweg (Outlet End of Mitering) 100.00 92.62
Outlet Invert 107.20 91.76
Outlet Culvert Top 107.20 98.98
D/S Water Surface Elev 107.20 93.30
U/S Water Surface Elev 153.10 93.43
Inlet Culvert Top 153.10 99.27
Inlet Culvert Invert 153.10 92.18
U/S Thalweg 232.10 92.87
U/S Water Surface Elev 232.10 93.99
U/S Water Surface Elev 249.10 94.33
U/S Thalweg 249.10 92.48

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