Fish Passage Site 20501406

Coordinates (dec. deg.): 62.21253°, -150.47340°
Legal Description: S025N007W36
Region: South Central
Road Name: Oil Well Road

Datum: NAD83
Quad Name / ITM: Talkeetna A-1
AWC Stream #: 247-41-10200-2081-3100-4155-5008
Stream Name: Cache 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 PRK09-OWR04

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Shallow fill; inadequate roadfill volume above culvert

Comments: Resurvey PRK041A043. Pipe is half a metal water tank (?) made into an open-bottom arch. Several salmonid fry obs u/s. pipe slope calc'd based on inverts.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Non-corrugated metal) Fish Passage Rating: Green
 
Length(ft): 26.9
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 3
Approach Angle: 35.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Cobble
InletOutlet
Width(ft):6.1 6.1
Height(ft):3.5 4.0
Apron Length(ft):0.0 0.0
Water Depth(ft): 1.1
Rustline Height(ft):3.5
Substrate Depth(ft):
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.98
Culvert Gradient: 2.00%
Max Slope:
Max Slope Length:
 

Comments: U/S gradient 0.80%; pipe slope calc'd based on inverts
  Culvert Observations:
  1. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):1.63
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 55.0 7.50
Upstream ordinary high water 90.0 6.00
Upstream ordinary high water 135.0 6.00
Upstream ordinary high water 200.0 5.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Headwater 1 96.55
Outlet Pool Water Elev 1 96.55
D/S Water Surface Elev (WS @ GP) 1 0.00 107.0 97.38
D/S Water Surface Elev (WS @ GP) 1 27.00 80.0 96.69
D/S Grade Ctrl (Thalweg) 1 59.00 48.0 94.40
D/S Water Surface Elev (WS @ GP) 1 59.00 48.0 94.56
D/S Water Surface Elev (WS @ GP) 1 82.00 25.0 96.55
D/S Tailcrest or 1st Thalweg 1 96.00 11.0 96.29
D/S Water Surface Elev (WS @ TWC) 1 96.00 11.0 96.54
D/S Thalweg 1 103.00 4.0 95.59
D/S Water Surface Elev (WS @ GP) 1 103.00 4.0 96.55
Outlet Invert 1 107.00 0.0 95.45
Road Elev 1 120.00 100.55
Inlet Culvert Invert (in thalweg) 1 133.00 0.0 95.29
U/S Grade Ctrl (Thalweg) 1 137.00 4.0 95.62
U/S Grade Ctrl (Thalweg) 1 158.00 25.0 96.15
U/S Grade Ctrl (Thalweg) 1 213.00 80.0 96.51
U/S Grade Ctrl (Thalweg) 1 240.00 107.0 97.30

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: Visual Observation, Ground (A)
Comments: Unidentified salmonids upstream from culvert about 5 cm in length.

Fish Observations

No fish observations occurred during this survey.

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