Fish Passage Site 20501492

Coordinates (dec. deg.): 62.49231°, -150.97986°
Legal Description: S028N009W29
Region: South Central
Road Name: Petersville Road

Datum: WGS84
Quad Name / ITM: Talkeetna B-2
AWC Stream #:
Stream Name: Rambler 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-PVR15

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert gradient red
  3. Mechanical damage or joints parting
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Compound gradient in pipe

Comments: Pipe is badly dented and bent; inside pipe is subs (cg/sc) similar to stream bed, but pipe too small and damaged

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 40.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 1
Approach Angle: 7.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):4.7 3.7
Height(ft):2.2 2.2
Apron Length(ft):
Water Depth(ft): 0.45
Rustline Height(ft):1.4
Substrate Depth(ft):0.2 1.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.5
Culvert Gradient: 4.13%
Max Slope:
Max Slope Length:
 

Comments: Inside of pipe has continuous substrate of small and large cobble similar to streambed and may function as a stream simulation but pipe is too small and damaged.
  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient red
  3. Mechanical damage or joints parting
  4. Shallow fill; inadequate roadfill volume above culvert
  5. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:GravelSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 90.0 7.00
Upstream ordinary high water 140.0 7.00
Upstream ordinary high water 200.0 8.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 97.60
U/S Headwater 1 99.42
D/S Grade Ctrl (Thalweg) 1 0.00 40.0 96.18
D/S Water Surface Elev (ws @ GP) 1 0.00 40.0 96.58
D/S Water Surface Elev (ws @ GP) 1 17.00 23.0 103.13
D/S Tailcrest or 1st Thalweg 1 35.00 5.0 97.32
D/S Water Surface Elev 1 35.00 5.0 97.57
D/S Thalweg (bottom) 1 37.60 2.4 97.11
Outlet Invert 1 40.00 0.0 97.15
Road Elev 1 60.00 102.16
Inlet Culvert Invert 1 80.00 0.0 98.82
U/S Grade Ctrl (Thalweg) (1st TC upstream (top of steep riffle)) 1 103.00 23.0 102.85

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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