Fish Passage Site 20501485

Coordinates (dec. deg.): 62.31997°, -150.46295°
Legal Description: S026N006W30
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna B-1
AWC Stream #:
Stream Name: Moose Creek tributary

Elevation:

Site Comments: MP 7.6

Survey Date: Jun 10, 2009

Survey PRK09-PVR08

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Compound gradient in pipe
  3. Mechanical damage or joints parting
  4. Culvert gradient red
  5. Hydraulic flows exceeded capacity

Comments: TWC > both inverts, but pipe is bowed up in the middle. High pt. in pipe > TWC so not BW. Slope upper pipe -1.9%.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 52.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 88.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.9 3.0
Apron Length(ft):
Water Depth(ft): 1.15
Rustline Height(ft):2.8
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: 0.4
Culvert Gradient: 0.13%
Max Slope: 3.25
Max Slope Length: 20.6
 

Comments: Pipe is bowed upwards in middle.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient red
  3. Compound gradient in pipe
  4. Mechanical damage or joints parting
  5. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:Silt/ClaySand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 93.0 7.50
Upstream ordinary high water 135.0 7.00
Upstream ordinary high water 170.0 8.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 92.07
U/S Headwater 1 92.13
D/S Water Surface Elev (WS at GP) 1 0.00 23.0 91.78
D/S Grade Ctrl (Thalweg) 1 0.00 23.0 91.44
D/S Tailcrest or 1st Thalweg 1 19.00 4.0 91.50
D/S Water Surface Elev (WS at TWC) 1 19.00 4.0 92.06
Outlet Invert 1 23.00 0.0 90.92
D/S Thalweg (high pt. inside pipe 20.6' u/s outlet) 1 43.60 -20.6 91.59
Road Elev 1 49.00 99.72
Inlet Culvert Invert 1 75.00 0.0 90.99
U/S Thalweg 1 75.00 0.0 90.32

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