Fish Passage Site 20501494

Coordinates (dec. deg.): 62.51407°, -150.91388°
Legal Description: S028N009W15
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna C-2
AWC Stream #:
Stream Name: Cache Creek tributary

Elevation:

Site Comments: None

Survey Date: Jun 29, 2009

Survey PRK09-PVR17

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Outfall height red
  2. Constriction ratio red
  3. Shallow fill; inadequate roadfill volume above culvert

Comments: Pipe bent in near middle.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Non-corrugated metal) Fish Passage Rating: Red
 
Length(ft): 20.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 2
Approach Angle: 72.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):1.2 1.2
Height(ft):1.0 1.1
Apron Length(ft):
Water Depth(ft): 0.09
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.65
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.24
Culvert Gradient: 1.05%
Max Slope:
Max Slope Length:
 

Comments: Culvert is bent in middle. Pipe is completely rusted.
  Culvert Observations:
  1. Outfall height red
  2. Constriction ratio red
  3. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 35.0 4.50
Upstream ordinary high water 91.0 6.00
Upstream ordinary high water 124.0 4.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 98.32
U/S Headwater 1 99.22
D/S Grade Ctrl (Thalweg) (d/s GP) 1 0.00 15.0 97.56
D/S Water Surface Elev (WS @ GP) 1 0.00 15.0 97.66
D/S Water Surface Elev 1 4.50 10.5 99.24
D/S Water Surface Elev (WS @ TWC) 1 11.10 3.9 98.32
D/S Tailcrest or 1st Thalweg 1 11.10 3.9 98.22
D/S Thalweg (bottom of pool) 1 14.00 1.0 97.82
D/S Thalweg 1 15.00 0.0 98.37
Outlet Invert 1 15.00 0.0 98.88
Road Elev 1 25.00 101.35
Inlet Culvert Invert 1 35.00 0.0 99.09
U/S Grade Ctrl (Thalweg) (1st u/s GP) 1 45.50 10.5 99.09

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