Fish Passage Site 20400600

Coordinates (dec. deg.): 61.46291°, -148.86023°
Legal Description: S016N003E23
Region: South Central
Road Name: Knik River Road

Datum: NAD83
Quad Name / ITM: Anchorage B-5
AWC Stream #: 247-50-10200-2120-3016
Stream Name: Doc's 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-MS004

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2019


Site Observations:

  1. Woody Debris

Comments: Constructed in 2019, bioengineering in good condition. Appears sedimetation could be occuring at the outlet, constructed banks burried under sediment.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 83.25
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 3.0
Corrugation Width(in.): 1.2
Condition Rating(1-5): 5
Approach Angle: 24.0
Sedimentation At Inlet: No
Inlet Substrate: Boulder
Outlet Substrate: Cobble
InletOutlet
Width(ft):10.8 10.0
Height(ft):5.48 4.2
Apron Length(ft):
Water Depth(ft): 0.45
Rustline Height(ft):
Substrate Depth(ft): 1.25
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 1.25
Culvert Gradient: 2.80%
Max Slope:
Max Slope Length:
 

Comments: Substrate depth: multiple measurements taken, 0.2, 1.52, 2.31, and 1.25. Embedded depth unknown, review design specs. Mitered culvert measured -2.6ft from end of outlet and -5.4ft from end of inlet. Total length of pipe for gradient was 75.25ft.
  Culvert Observations:
  1. Woody Debris

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:BoulderCobble
Subdominant:CobbleGravel
Stream Slope(deg.):2.2
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 42.0 9.30
Upstream ordinary high water 117.0 5.30
Upstream ordinary high water 140.0 9.40

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.72
D/S Thalweg 0.00 91.66
D/S Water Surface Elev 0.00 92.06
D/S Thalweg 37.00 92.46
D/S Water Surface Elev 37.00 92.88
D/S Water Surface Elev 83.00 93.40
D/S Thalweg 83.00 92.75
D/S Thalweg 94.00 93.63
D/S Water Surface Elev 94.00 94.17
D/S Water Surface Elev (Outlet WS) 100.00 94.18
Outlet Culvert Top 100.00 98.01
Outlet Invert 100.00 93.71
Inlet Culvert Top 177.25 100.12
Inlet Culvert Invert 177.25 94.65
U/S Water Surface Elev (Inlet WS) 177.25 95.41
U/S Thalweg 208.25 97.10
U/S Water Surface Elev 208.25 97.50

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