Fish Passage Site 20501395

Coordinates (dec. deg.): 62.30992°, -150.36887°
Legal Description: S026N006W27
Region: South Central
Road Name: Petersville Road

Datum: NAD83
Quad Name / ITM: Talkeetna B-1
AWC Stream #: 247-41-10200-2081-3100-4136-5027
Stream Name: Ninemile Creek tributary

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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-PVR05

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools:
Construction Year:


Site Observations:

  1. Mechanical damage or joints parting
  2. Hydraulic flows exceeded capacity
  3. Constriction ratio red

Comments: TWC > both inverts = BW; inlet is crumpled and rusted out; resurvey of PRK04IA032. Visual observation of juvenile salmonids u/s. Site is a resurvey and connected to and AWC system so no traps were set. Water goes subsurface after exiting pipe 2 for a short distance.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 60.2
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 49.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.3 3.9
Height(ft):3.4 3.8
Apron Length(ft):
Water Depth(ft): 1.17
Rustline Height(ft):3.1
Substrate Depth(ft):0.0 0.2
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.46
Culvert Gradient: -0.45%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Hydraulic flows exceeded capacity
  3. Constriction ratio red
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 60.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 14.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.4 4.0
Height(ft):3.2 3.3
Apron Length(ft):
Water Depth(ft): 1.05
Rustline Height(ft):2.6
Substrate Depth(ft):0.0 0.6
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.46
Culvert Gradient: 0.38%
Max Slope:
Max Slope Length:
 

Comments: Resurvey of IA032; HWS = TWS = BW; inlet crumpled and torn; vis obs juv salmonid 2-8 cm u/s. Water goes subsurface after exiting culvert for a short distance.
  Culvert Observations:
  1. Mechanical damage or joints parting
  2. Hydraulic flows exceeded capacity
  3. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:Silt/ClaySand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 42.0 10.50
Upstream ordinary high water 122.0 11.00
Upstream ordinary high water 190.0 9.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 93.93
U/S Headwater 1 93.94
Outlet Pool Water Elev 2 94.02
U/S Headwater 2 94.04
Road Elev (d/s edge of pavement) 100.86
D/S Grade Ctrl (Thalweg) 1 0.00 66.0 92.53
D/S Water Surface Elev (ws at gp) 1 0.00 66.0 92.98
D/S Tailcrest or 1st Thalweg 1 32.00 34.0 93.58
D/S Water Surface Elev (ws at twc) 1 32.00 34.0 93.89
D/S Thalweg 1 60.00 6.0 92.15
D/S Water Surface Elev (ws at gp) 2 63.50 2.5 94.03
D/S Water Surface Elev (ws at gp) 1 64.00 2.0 93.97
Outlet Invert 1 66.00 0.0 92.76
Outlet Invert 2 66.00 0.0 92.97
Inlet Culvert Invert 1 126.00 0.0 92.49
Inlet Culvert Invert 2 126.00 0.0 93.20
U/S Grade Ctrl (Thalweg) 1 128.00 2.0 93.03
U/S Grade Ctrl (Thalweg) 2 128.50 2.5 92.98

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 juvenile salmonids (unidentified) upstream from culvert. Estimated length between 2-8 cm.

Fish Observations

No fish observations occurred during this survey.

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