Fish Passage Site 40601685

Coordinates (dec. deg.): 66.61287°, -150.68922°
Legal Description: F021N014W30
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Bettles C-2
AWC Stream #:
Stream Name: Pung's Crossing Creek

Elevation:

Site Comments: Bridge u/s at pipeline.

Survey Date: Aug 25, 2010

Survey EDS10-DAL25

Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: Bridge u/s at pipeline. Whole inlet is rusty, maybe from stream which is tannic. Stream gradient measured at 0.19% but probably closer to 1% overall. Flat section u/s from culvert. Stream simulation culvert looks nice.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 128.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 44.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: Gravel
InletOutlet
Width(ft):10.0 10.0
Height(ft):6.7 7.2
Apron Length(ft):0.0 0.0
Water Depth(ft): 1.59
Rustline Height(ft):5.0
Substrate Depth(ft):3.3 2.8
Backwatered?: No
Baffles Present:
Embedded?: Yes
Embedded Depth(ft): 2.8
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.99
Culvert Gradient: 1.13%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type
ID: 2 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 129.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 44.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: Gravel
InletOutlet
Width(ft):10.0 10.0
Height(ft):6.5 6.35
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.62
Rustline Height(ft):4.5
Substrate Depth(ft):3.5 3.65
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 3.5
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.99
Culvert Gradient: 1.05%
Max Slope:
Max Slope Length:
 

Comments: Rust line hieght is estimated, whole inlet is rusty or stained.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):0.19
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 120.0 10.00
Upstream ordinary high water 170.0 12.00
Upstream ordinary high water 205.0 9.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 120.10
D/S Thalweg (head of riffle, begin natural channel) 0.00 93.17
D/S Water Surface Elev 0.00 93.85
D/S Grade Ctrl (Thalweg) (top of rip rap place below outlets) 2 12.00 93.88
D/S Water Surface Elev 2 12.00 94.74
D/S Tailcrest or 1st Thalweg (Tail water control) 1 12.30 94.46
D/S Water Surface Elev (water surface at tail water control) 1 12.30 94.84
Max Pool Depth (max depth at outlet pool pipe 2) 2 17.00 93.54
D/S Water Surface Elev (tail water surface pipe 2) 2 19.00 94.81
Max Pool Depth 1 19.00 93.20
D/S Water Surface Elev (Tail water surface) 1 20.00 94.88
D/S Water Surface Elev (Water surface at outlet) 1 21.00 94.88
Outlet Invert (on substrate) 1 21.00 93.29
Outlet Invert (on substrate) 2 21.00 94.19
D/S Water Surface Elev (water surface at outlet) 2 21.00 94.81
Outlet Culvert Top (top of pipe outlet) 2 21.00 100.77
Outlet Culvert Top (top of pipe outlet) 1 21.00 100.96
Inlet Culvert Top (top of pipe inlet) 1 150.00 102.42
Inlet Culvert Invert (on substrate) 1 150.00 94.99
Inlet Culvert Invert (on substrate) 2 150.00 95.60
U/S Water Surface Elev (water surface at inlet) 1 150.00 96.08
U/S Water Surface Elev (water surface at inlet) 2 150.00 96.09
U/S Headwater (HWS for both pipes) 150.50 96.09
U/S Grade Ctrl (Thalweg) (head of riffle begin u/s profile) 235.00 97.07
U/S Water Surface Elev 235.00 97.54
U/S Water Surface Elev 261.00 97.60
Misc. (u/s profile point max pool depth) 261.00 95.48
U/S Water Surface Elev 303.00 97.62
U/S Grade Ctrl (Thalweg) (top of riffle) 303.00 97.09
U/S Water Surface Elev 323.00 97.67
Misc. (U/S profile point max pool depth) 323.00 95.58
U/S Grade Ctrl (Thalweg) (grade point) 338.00 96.47
U/S Water Surface Elev 338.00 97.74

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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