Fish Passage Site 20501483

Coordinates (dec. deg.): 62.31097°, -150.37393°
Legal Description: S026N006W27
Region: South Central
Road Name: Petersville Road

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

Elevation:

Site Comments: None

Survey Date: Jun 09, 2009

Survey PRK09-PVR06

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. Constriction ratio red
  2. Hydraulic flows exceeded capacity

Comments: Fish obs in d/s pools: 15 cm sculpin, 20 cm pike, several juv salmonids 5-10 cm. No traps set sight was FWScaptured fish upstream in 2008.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 64.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 11.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.0 4.0
Apron Length(ft):
Water Depth(ft): 0.39
Rustline Height(ft):3.0
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: 0.45
Culvert Gradient: 0.34%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:CobbleSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 55.0 8.50
Upstream ordinary high water 80.0 8.50
Upstream ordinary high water 125.0 9.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 91.27
U/S Headwater 1 91.41
D/S Grade Ctrl (Thalweg) 1 0.00 53.0 89.87
D/S Water Surface Elev (ws at gp) 1 0.00 53.0 91.01
D/S Tailcrest or 1st Thalweg 1 26.00 27.0 90.95
D/S Water Surface Elev (ws at twc) 1 26.00 27.0 91.26
D/S Thalweg (bottom of pool) 1 39.20 13.8 89.34
D/S Thalweg 1 48.00 5.0 90.18
D/S Water Surface Elev (ws at gp) 1 50.00 3.0 91.57
D/S Thalweg (stream bed end of pipe) 1 53.00 0.0 90.59
Outlet Invert 1 53.00 0.0 90.88
Road Elev (u/s edge of pavement) 1 85.00 99.55
Inlet Culvert Invert 1 117.00 0.0 91.10
U/S Grade Ctrl (Thalweg) 1 120.00 3.0 90.89

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

Gear Type: Visual Observation, Ground (A)
Comments: Visual observation of sculpin (est 15cm), pike(est 20cm) and several juvenile salmonids (est 5-10cm) in downstream pools.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov