Fish Passage Site 20501187

Coordinates (dec. deg.): 61.78111°, -149.27827°
Legal Description: S020N001E33
Region: South Central
Road Name: Goldchord Road

Datum: WGS84
Quad Name / ITM: Anchorage D-7
AWC Stream #:
Stream Name: Fishhook Creek

Elevation:

Site Comments: None

Survey Date: Sep 21, 2009

Survey MSB09-GCR01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Outfall height red
  3. Constriction ratio gray
  4. Compound gradient in pipe
  5. Mechanical damage or joints parting
  6. Culvert is poorly aligned

Comments: No fish caught, but one obs d/s.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 45.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 2
Approach Angle: 55.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):9.3 9.5
Height(ft):6.5 5.9
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):1.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.59
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.56
Culvert Gradient: 4.31%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red
  3. Constriction ratio gray
  4. Compound gradient in pipe
  5. Mechanical damage or joints parting
  6. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 72.0 19.00
Upstream ordinary high water 119.0 14.50
Upstream ordinary high water 171.0 16.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev (WS of outlet pool) 1 90.04
U/S Headwater 1 93.68
D/S Grade Ctrl (Thalweg) 1 0.00 14.5 88.69
D/S Water Surface Elev (@GP) 1 0.00 14.5 89.25
D/S Tailcrest or 1st Thalweg 1 5.50 9.0 89.44
D/S Water Surface Elev (@TWC) 1 5.50 9.0 90.03
D/S Thalweg (bottom of out pool) 1 10.00 4.5 88.36
D/S Thalweg (bottom of plunge) 1 13.00 1.5 89.27
Outlet Invert 1 14.50 0.0 91.38
Road Elev 1 37.00 100.54
Inlet Culvert Invert 1 59.50 0.0 93.32
U/S Grade Ctrl (Thalweg) (1st GP u/s: top of riffle into inlet) 1 70.50 11.0 94.88
U/S Water Surface Elev (@GP) 1 70.50 11.0 95.10

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): 1.0
Comments: no fish caught; 80ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: no fish caught; 40ft d/s
 
Gear Type: Visual Observation, Ground (C)
Comments: Unidentified fish observed downstream of culvert.

Fish Observations

No fish observations occurred during this survey.

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