Fish Passage Site 40501709

Coordinates (dec. deg.): 65.39685°, -148.91628°
Legal Description: F007N007W35
Region: Interior
Road Name: Elliott Highway

Datum: WGS84
Quad Name / ITM: Livengood B-4
AWC Stream #:
Stream Name:

Elevation:

Site Comments: MP 84

Survey Date: Jul 07, 2010

Survey EDS10-ELH24

Observers: Mark Eisenman, Justin Leon

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Road bank erosion
  3. Outfall height red
  4. Culvert gradient red

Comments: This culvert had multiple channels upstream so no approach angle was taken. Downstream widths were used for this same reason. There are pieces of culvert downstream, as well as a lot of erosion. The stream looks like it could have been disturbed from a recent fire. No minnow traps were set here because the water was too shallow.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 41.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.5 2.5
Height(ft):2.5 2.5
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.23
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.83
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.4
Culvert Gradient: 5.26%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Road bank erosion
  3. Outfall height red
  4. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:Silt/ClayGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 89.0 8.40
Downstream ordinary high water 125.0 6.90
Downstream ordinary high water 146.0 3.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road Surface) 101.91
D/S Thalweg (Thalweg) 0.00 90.99
D/S Water Surface Elev (Water Surface) 0.00 91.47
D/S Tailcrest or 1st Thalweg (Thalweg) 56.00 93.31
D/S Water Surface Elev (Water Surface) 56.00 93.67
Outlet Pool Water Elev (Water Surface) 67.00 93.74
Max Pool Depth (Substrate) 67.00 92.00
Outlet Invert (Bottom of Pipe) 70.00 95.34
D/S Water Surface Elev (Water Surface) 70.00 95.57
Inlet Culvert Invert (Bottom of Pipe) 111.10 97.50
U/S Water Surface Elev (Water Surface) 111.10 98.02
U/S Headwater (Water Surface) 113.10 98.10
U/S Thalweg (Substrate) 113.10 97.77

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

Gear Type: None (A)
Comments: No traps set water too shallow, no fish observed.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov