Fish Passage Site 40601673

Coordinates (dec. deg.): 68.02931°, -149.69649°
Legal Description: U016S010E25
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Philip Smith Mts A-5
AWC Stream #:
Stream Name: Dietrich River tributary

Elevation:

Site Comments: None

Survey Date: Aug 21, 2010

Survey EDS10-DAL13

Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert is too short
  2. Outfall height red
  3. Culvert gradient red
  4. Culvert gradient gray
  5. Constriction ratio gray

Comments: Flow only in one pipe- see individual culvert and rating comments.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 80.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.25
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 16.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):6.0 6.0
Height(ft):4.2 6.0
Apron Length(ft):
Water Depth(ft): 0.31
Rustline Height(ft):2.6
Substrate Depth(ft):1.8 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.33
Outfall Type: Free Fall In To Pool
Constriction Ratio: 0.65
Culvert Gradient: 3.68%
Max Slope:
Max Slope Length:
 

Comments: Culvert has substrate through 90% of its length. No substrate last 2ft, then small outfall into pool. No trapping - too shallow. All flow is through pipe 1
  Culvert Observations:
  1. Culvert is too short
  2. Outfall height red
  3. Culvert gradient red
  4. Constriction ratio gray
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 80.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.25
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 16.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):6.0 6.0
Height(ft):2.5 5.4
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):2.6
Substrate Depth(ft):3.5 0.6
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.65
Culvert Gradient: 1.10%
Max Slope:
Max Slope Length:
 

Comments: no flow through pipe 2
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Culvert is too short

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 66.0 12.50
Upstream ordinary high water 135.0 13.50
Upstream ordinary high water 210.0 13.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 1 0.00 92.42
D/S Water Surface Elev 1 0.00 92.75
Max Pool Depth (bottom of outlet pool) 1 8.50 90.75
Outlet Pool Water Elev ((TWS)) 1 10.50 92.76
Outlet Invert (on metal) 1 12.50 92.78
D/S Water Surface Elev (ws @ outlet) 1 12.50 93.09
Outlet Invert (on subs) 2 12.50 93.59
Outlet Culvert Top 1 12.50 98.81
Outlet Culvert Top 2 12.50 99.05
Inlet Culvert Top 1 92.90 100.04
Inlet Culvert Invert 1 92.90 95.74
Inlet Culvert Invert 2 93.30 95.74
Inlet Culvert Top 2 93.30 99.94
U/S Headwater (=ws @ inlet) 1 94.00 96.30

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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