Fish Passage Site 20203734

Coordinates (dec. deg.): 60.12344°, -149.36717°
Legal Description: S001S001W01
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10104
Stream Name: Unnamed

Elevation:

Site Comments: Cuvlert is on a gravel pit access road

Survey Date: Jul 15, 2017

Survey KEN17-75_2007

Observers: Jeff Sires, Luke Violette, Louis Mitchell

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Shallow fill; inadequate roadfill volume above culvert
  3. Structural Problem
  4. Mechanical damage or joints parting
  5. Hydraulic flows exceeded capacity
  6. Culvert gradient gray

Comments: KWFRES_17_07. Culvert assessment data and photographs submitted by the Kenai Watershed Forum.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 45.38
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.83 5.67
Height(ft):6.2 4.6
Apron Length(ft):
Water Depth(ft): 2.45
Rustline Height(ft):4.4
Substrate Depth(ft):0.0 0.75
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.32
Culvert Gradient: 1.28%
Max Slope:
Max Slope Length:
 

Comments: Interior of culvert shows damage from shallow fill. Culvert undersized for creek.
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio red
  3. Culvert sagging in middle
  4. Structural Problem
  5. Mechanical damage or joints parting
  6. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):2.67
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 110.0 21.00
Downstream ordinary high water 240.0 19.00
Downstream ordinary high water 300.0 21.00
Upstream ordinary high water 50.0 13.00
Upstream ordinary high water 200.0 19.00
Upstream ordinary high water 250.0 22.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.08
D/S Thalweg 0.00 90.73
D/S Water Surface Elev 0.00 91.64
D/S Water Surface Elev 61.00 92.25
D/S Grade Ctrl (Thalweg) 61.00 91.47
D/S Thalweg 100.00 91.51
D/S Water Surface Elev 100.00 92.58
D/S Water Surface Elev 124.00 93.04
D/S Grade Ctrl (Thalweg) 124.00 92.34
D/S Grade Ctrl (Thalweg) 210.00 94.00
D/S Water Surface Elev 210.00 94.41
D/S Water Surface Elev 254.00 95.16
D/S Grade Ctrl (Thalweg) 254.00 94.39
D/S Grade Ctrl (Thalweg) 344.00 95.59
D/S Water Surface Elev 344.00 96.25
D/S Water Surface Elev 367.00 96.46
D/S Thalweg 367.00 95.73
Max Pool Depth 396.00 93.44
Outlet Pool Water Elev 396.00 96.56
Outlet Culvert Top 400.00 98.69
D/S Water Surface Elev 400.00 96.44
Outlet Invert 400.00 93.88
Inlet Culvert Invert 445.38 93.12
U/S Water Surface Elev 445.38 96.55
Inlet Culvert Top 445.38 99.27
U/S Water Surface Elev 446.38 96.53
U/S Thalweg 446.38 93.36
U/S Grade Ctrl (Thalweg) 462.38 96.06
U/S Water Surface Elev 462.38 97.00
U/S Grade Ctrl (Thalweg) 499.38 98.50
U/S Water Surface Elev 499.38 98.90
U/S Thalweg 595.38 100.25
U/S Water Surface Elev 595.38 100.52

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: Minnow Trap (A) Trap Duration(h): 1.75
Comments: Trap set about 50 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.75
Comments: Trap set about 20 feet downstream

Fish Observations

No fish observations occurred during this survey.

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