Fish Passage Site 20501512

Coordinates (dec. deg.): 62.38356°, -150.72408°
Legal Description: S027N008W34
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: Jul 09, 2009

Survey PRK09-PVR35

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. Constriction ratio gray
  3. Outfall height red
  4. Culvert sagging in middle

Comments: Pipe bowed down in middle.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 4.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.5 3.5
Height(ft):3.6 3.5
Apron Length(ft):
Water Depth(ft): 0.12
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.48
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.57
Culvert Gradient: 1.95%
Max Slope:
Max Slope Length:
 

Comments: Pipe bowed down in middle.

  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient red
  3. Constriction ratio gray
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 29.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 4.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.1 4.0
Apron Length(ft):
Water Depth(ft): 0.02
Rustline Height(ft):2.1
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.57
Culvert Gradient: 2.69%
Max Slope:
Max Slope Length:
 

Comments: Pipe bowed down in middle.

  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:SandGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream ordinary high water 45.0 7.50
Upstream ordinary high water 75.0 10.00
Upstream ordinary high water 118.0 10.50

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
U/S Headwater 1 96.65
U/S Headwater 2 96.54
Outlet Pool Water Elev 1 95.38
Outlet Pool Water Elev 2 95.78
D/S Grade Ctrl (Thalweg) 0.00 31.0 94.92
D/S Water Surface Elev (WS @ GP WS @ GP) 0.00 31.0 95.10
D/S Tailcrest or 1st Thalweg (TWC for main channel) 1 10.00 21.0 95.22
D/S Water Surface Elev (WS @ TWC) 1 10.00 21.0 95.37
D/S Tailcrest or 1st Thalweg 2 23.00 8.0 95.73
D/S Water Surface Elev (WS @ TWC) 2 23.00 8.0 95.78
D/S Thalweg (bottom of out pool) 1 24.00 7.0 93.62
D/S Thalweg (bottom of out pool) 2 25.50 5.5 94.49
Outlet Invert 1 31.00 0.0 95.74
D/S Thalweg (streambed at end of pipe) 1 31.00 0.0 94.82
Outlet Invert 2 31.00 0.0 95.76
D/S Thalweg (streambed end of pipe) 2 31.00 0.0 95.52
Road Elev 48.00 101.66
Inlet Culvert Invert (Pool imm. u/s of inlet) 1 65.00 0.0 96.53
Inlet Culvert Invert 2 65.00 0.0 96.54
U/S Grade Ctrl (Thalweg) (no water; TC of pool at inlet of pipe 2) 2 67.00 2.0 96.88

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