Fish Passage Site 20501398

Coordinates (dec. deg.): 62.33728°, -150.57411°
Legal Description: S026N007W16
Region: South Central
Road Name: Petersville Road

Datum: NAD83
Quad Name / ITM: Talkeetna B-2
AWC Stream #: 247-41-10200-2081-3194
Stream Name: Seventeen Mile Creek

Elevation:

Site Comments: None

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-PVR11

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

Comments: Resurvey of PRK041A035; joints parting 10.4' u/s of outlet, makes a grade break/compound slope; Red by CG

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 61.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 1
Approach Angle: 2.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.0 5.0
Height(ft):4.9 5.1
Apron Length(ft):
Water Depth(ft): 0.5
Rustline Height(ft):3.3
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: 0.65
Culvert Gradient: 0.50%
Max Slope: 6.5
Max Slope Length: 10.4
 

Comments: Joints parting on outlet, section is about 10 feet long. Rust line indicates pipe is undersized for max flows.
  Culvert Observations:
  1. Constriction ratio gray
  2. Mechanical damage or joints parting
  3. Compound gradient in pipe
  4. Hydraulic flows exceeded capacity
  5. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 60.0 7.50
Upstream ordinary high water 130.0 8.00
Upstream ordinary high water 155.0 7.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev (prob a little low - water turbulence) 1 95.24
U/S Headwater 1 95.91
D/S Water Surface Elev (ws @ GP) 1 0.00 88.0 94.81
D/S Grade Ctrl (Thalweg) 1 0.00 88.0 94.02
D/S Water Surface Elev (ws @ TWC - use WS @ TWC for TWS) 1 44.00 44.0 95.29
D/S Tailcrest or 1st Thalweg 1 44.00 44.0 94.79
D/S Thalweg (bottom of pool) 1 72.00 16.0 91.49
D/S Water Surface Elev (ws @ GP) 1 82.50 5.5 95.92
D/S Thalweg 1 83.00 5.0 93.04
D/S Thalweg (stream bed end of pipe) 1 88.00 0.0 94.34
Outlet Invert 1 88.00 0.0 94.74
D/S Thalweg (10.4' u/s from outlet - grade break inside pipe) 1 98.40 -10.4 95.42
Road Elev 118.50 103.85
Inlet Culvert Invert 1 149.00 0.0 95.05
U/S Grade Ctrl (Thalweg) 1 154.50 5.5 95.15

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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