Fish Passage Site 20401274

Coordinates (dec. deg.): 61.62593°, -149.31238°
Legal Description: S018N001E29
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Wolf Lake outlet stream

Elevation:

Site Comments: Culvert located on remote drive located N. of end of N. Caribou St.

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 MSB11-PDC01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: John Greuey, Abraham Gioffre

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Mechanical damage or joints parting
  3. Culvert sagging in middle
  4. Culvert gradient red

Comments: Dwst of outlet is a section of the channel with a slope of 8.4%.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 25.71
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 8.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Cobble
InletOutlet
Width(ft):1.94 1.95
Height(ft):1.82 1.75
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.47
Rustline Height(ft):0.68
Substrate Depth(ft):0.0 0.4
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.42
Culvert Gradient: 2.80%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Mechanical damage or joints parting
  3. Culvert sagging in middle
  4. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:OrganicCobble
Stream Slope(deg.):2.3
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 24.0 5.50
Upstream ordinary high water 62.0 4.50
Upstream ordinary high water 78.0 4.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Grade Ctrl (Thalweg) (Top of wooden debris riffle) 0.00 100.74
U/S Water Surface Elev (Used for stream gradient) 0.00 100.86
U/S Water Surface Elev 28.00 100.17
U/S Grade Ctrl (Thalweg) (Top of debris riffle) 28.00 99.97
U/S Grade Ctrl (Thalweg) (Top of gravel riffle) 40.00 99.95
U/S Water Surface Elev 40.00 100.11
U/S Thalweg (Upstream profile point. Beginning of glide.) 75.00 98.75
U/S Water Surface Elev (Used for stream gradient) 75.00 99.14
Inlet Culvert Invert (On pipe) 85.00 98.76
U/S Water Surface Elev (Water surface at inlet invert) 85.00 99.10
Inlet Culvert Top 85.00 100.72
Road Elev 97.00 103.16
Outlet Culvert Top 110.71 100.00
D/S Water Surface Elev (Water surface at outlet invert) 110.71 98.63
Outlet Invert (On substrate) 110.71 98.16
D/S Grade Ctrl (Thalweg) (Top of riffle) 113.71 98.49
D/S Water Surface Elev (Used for max gradient) 113.71 98.57
D/S Grade Ctrl (Thalweg) (Bottom of riffle) 126.71 97.14
D/S Water Surface Elev (Used for max gradient) 126.71 97.48

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