Fish Passage Site 20501480

Coordinates (dec. deg.): 62.31267°, -150.34764°
Legal Description: S026N006W26
Region: South Central
Road Name: Petersville Road

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

Elevation:

Site Comments: None

Survey Date: Jun 08, 2009

Survey PRK09-PVR03

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

Comments: All flow is through pipe 2 so CR pipe 2 only = 0.63; vis obs juv salmonids u/s.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural aluminum plate) Fish Passage Rating: Red
 
Length(ft): 58.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 24.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.8 2.9
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.0
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: 0.8
Culvert Gradient: 1.01%
Max Slope:
Max Slope Length:
 

Comments: All flow is through pipe 2
  Culvert Observations:
  1. Culvert gradient red
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 60.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.9 3.9
Height(ft):4.0 4.0
Apron Length(ft):
Water Depth(ft): 0.62
Rustline Height(ft):2.4
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: 0.8
Culvert Gradient: 0.69%
Max Slope:
Max Slope Length:
 

Comments: all flow is through pipe 2 (this pipe); CR pipe 2 only = 0.63.
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:CobbleGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 50.0 6.50
Upstream ordinary high water 95.0 6.00
Upstream ordinary high water 115.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev (between pipes) 91.40
U/S Headwater (hws for both pipes) 92.02
Road Elev (u/s edge of rd) 99.20
D/S Grade Ctrl (Thalweg) 0.00 95.0 89.50
D/S Water Surface Elev (ws @ GP) 0.00 95.0 90.43
D/S Tailcrest or 1st Thalweg 58.00 37.0 90.42
D/S Water Surface Elev (ws @ TWC) 58.00 37.0 91.41
D/S Thalweg (bottom of pool) 72.50 22.5 87.90
D/S Thalweg 1 90.00 5.0 88.96
D/S Thalweg 2 90.00 5.0 89.58
Outlet Invert 2 95.00 0.0 90.78
Outlet Invert 1 95.00 0.0 91.50
Inlet Culvert Invert (no water) 1 154.00 0.0 92.09
Inlet Culvert Invert 2 154.00 0.0 91.20
U/S Thalweg 1 156.80 2.8 91.13

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.

Fish Observations

No fish observations occurred during this survey.

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