Fish Passage Site 20501491

Coordinates (dec. deg.): 62.48464°, -150.76430°
Legal Description: S028N008W28
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna B-2
AWC Stream #:
Stream Name: Peters Creek tributary

Elevation:

Site Comments: None

Survey Date: Jun 26, 2009

Survey PRK09-PVR14

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. Outfall height red
  2. Mechanical damage or joints parting
  3. Culvert gradient red
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Beaver Activity

Comments: All flow is though pipe 2. Upstream channel from pipe 1 flows through pipe at high water. Tadpoles observed at pipe 1 inlet in still water. Inlet pipe 1 is pulling apart but pipe looks fairly new. Pipe 2 has a beaver grate. Old beaver dams upstream and downstream from culverts. Constriction ratio is for both pipes. CR if using only Pipe 2 is .59.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 40.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 26.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.8
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.15
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.83
Culvert Gradient: 0.97%
Max Slope:
Max Slope Length:
 

Comments: Trickle of flow at outlet; u/s channel from pipe 1 connects to main u/s channel only at high water; inlet 1 pulling apart. CR with both pipes is .83.
  Culvert Observations:
  1. Outfall height gray
  2. Mechanical damage or joints parting
  3. Culvert gradient gray
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Beaver Activity
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 4
Approach Angle: 2.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.0 2.0
Height(ft):2.0 2.0
Apron Length(ft):
Water Depth(ft): 0.1
Rustline Height(ft):0.7
Substrate Depth(ft): 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.93
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.83
Culvert Gradient: 0.52%
Max Slope:
Max Slope Length:
 

Comments: pipe 2 has all flow; CR is .83 with both pipes
  Culvert Observations:
  1. Outfall height red
  2. Mechanical damage or joints parting
  3. Culvert gradient gray
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClaySand
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 57.0 2.80
Downstream ordinary high water 82.0 3.10
Downstream ordinary high water 100.0 4.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 2 97.30
U/S Headwater (pool immed u/s) 1 98.65
U/S Headwater 2 99.67
D/S Grade Ctrl (Thalweg) 2 0.00 15.0 96.88
D/S Water Surface Elev (ws @ GP) 2 0.00 15.0 97.00
D/S Tailcrest or 1st Thalweg 1 2.50 12.5 97.73
D/S Water Surface Elev (ws @ TWC - use for TWS) 1 2.50 12.5 97.77
D/S Tailcrest or 1st Thalweg 2 7.00 8.0 97.11
D/S Water Surface Elev (ws @ TWC) 2 7.00 8.0 97.29
D/S Thalweg 2 10.50 4.5 95.68
D/S Thalweg (bottom of pool) 2 12.00 3.0 95.14
D/S Thalweg (bottom of pool) 1 12.20 2.8 96.73
D/S Thalweg 2 14.00 1.0 96.32
Outlet Invert 1 15.00 0.0 97.92
Outlet Invert 2 15.00 0.0 99.13
D/S Thalweg (stream bed end of pipe) 1 15.00 0.0 97.37
Road Elev (over pipe 1) 35.00 101.51
Road Elev (over pipe 2) 35.00 102.33
Inlet Culvert Invert 2 55.00 0.0 99.34
Inlet Culvert Invert 1 55.00 0.0 98.31

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.

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