Fish Passage Site 20501428

Coordinates (dec. deg.): 61.65881°, -149.93474°
Legal Description: S018N004W11
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Lake Creek tributary

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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-MS069

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient red

Comments: Outlet flows smooth over apron then steps down into 9 installed man made pools. This was resurveyed on 9/29/23.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 164.76
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 36.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.1 5.1
Apron Length(ft):7.4 7.3
Water Depth(ft):0.0 0.69
Rustline Height(ft):1.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: Smooth Flow Over Apron
Constriction Ratio: 0.61
Culvert Gradient: 2.23%
Max Slope:
Max Slope Length:
 

Comments: There is a thaw pipe installed through the culvert.
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:BoulderBoulder
Subdominant:GravelGravel
Stream Slope(deg.):2.79
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 0.0 8.80
Upstream ordinary high water 12.0 6.10
Upstream ordinary high water 32.0 7.50
Upstream ordinary high water 48.0 10.55

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 112.56
U/S Water Surface Elev 18.00 86.17
U/S Thalweg 18.00 85.21
U/S Thalweg 48.00 85.55
U/S Water Surface Elev 48.00 86.00
Inlet Culvert Top 100.00 89.63
Inlet Culvert Invert 100.00 84.49
U/S Water Surface Elev 100.00 84.96
Outlet Culvert Top 264.76 85.96
Outlet Invert 264.76 80.89
D/S Water Surface Elev 264.76 81.58
D/S Thalweg 283.76 81.49
D/S Water Surface Elev 283.76 81.55
D/S Thalweg 290.76 80.99
D/S Water Surface Elev 290.76 81.06
D/S Thalweg 297.76 80.32
D/S Water Surface Elev 297.76 80.47
D/S Thalweg 304.76 79.79
D/S Water Surface Elev 304.76 80.09
D/S Thalweg 312.76 78.77
D/S Water Surface Elev 312.76 79.38
D/S Thalweg 320.76 78.57
D/S Water Surface Elev 320.76 78.93
D/S Thalweg 328.76 78.13
D/S Water Surface Elev 328.76 78.37
D/S Water Surface Elev 333.76 77.89
D/S Thalweg 333.76 77.52
D/S Water Surface Elev 336.76 77.59
D/S Thalweg 336.76 77.19
D/S Thalweg 364.76 76.04
D/S Water Surface Elev 364.76 76.50

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