Fish Passage Site 20501414

Coordinates (dec. deg.): 62.19051°, -150.21049°
Legal Description: S024N005W09
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Talkeetna A-1
AWC Stream #: 247-41-10200-2291
Stream Name: Rabideux Creek

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 MSB11-PRK11

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Abraham Gioffre, Jim Latham

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity
  2. Woody Debris
  3. Compound gradient in pipe

Comments: Water level was about 4.5' deep at outlet and one continuous pool dwst. Inlet water depth was about 4.5' deep as well with flat water through the pipe and in the immediate area. Water depth made measurements difficult. Culvert 1 has a beaver dam near inlet pipe creating some blockage and diverting most water to pipe 2.. Upst area is a ponded marsh with no defined channel. Inlet and outlet measurements were difficult due to high water depth.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 116.9
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):10.6 10.6
Height(ft):12.3 12.6
Apron Length(ft):0.0 0.0
Water Depth(ft): 4.58
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.50%
Max Slope:
Max Slope Length:
 

Comments: Total pipe length is equal to 116.9 with each end of miter measuring 11'. Pipe gradient was determined using inverts at the end of the enclosure which was 94.9' in length.
  Culvert Observations:
  1. Woody Debris
  2. Beaver Activity
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 117.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):10.6 10.6
Height(ft):12.6 12.6
Apron Length(ft):0.0 0.0
Water Depth(ft): 4.36
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.12%
Max Slope:
Max Slope Length:
 

Comments: Total pipe length is 117 with each end of the miter being 11'. Pipe gradient was determined with invert at the end of the enclosure which was 95' in length.
  Culvert Observations:
  1. Woody Debris
  2. Beaver Activity
  3. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:OrganicSilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev (water surface at end of pipe miters, too deep to measure depths) 0.00 85.55
D/S Water Surface Elev (outlet water surface, beaver dam in middle of pipe) 1 11.00 85.55
Outlet Invert (on pipe) 1 11.00 80.97
Outlet Invert (on pipe) 2 11.00 81.14
D/S Water Surface Elev (outlet water surface) 2 11.00 85.50
Outlet Culvert Top 1 11.00 93.91
Outlet Culvert Top 2 11.00 93.99
Road Elev 81.00 100.55
Top of Pipe Inlet 1 105.90 93.84
Inlet Culvert Invert (on pipe) 1 105.90 81.44
U/S Water Surface Elev (inlet water surface) 1 105.90 85.81
U/S Water Surface Elev (inlet water surface) 2 105.96 85.81
Inlet Culvert Invert (on pipe) 2 105.96 81.25
Inlet Culvert Top 2 105.96 94.00
U/S Headwater (Upst headwater surface elev. Too deep for stream depths) 116.96 85.85

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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