Fish Passage Site 40601677

Coordinates (dec. deg.): 67.82741°, -149.82732°
Legal Description: F035N010W28
Region: Interior
Road Name: Dalton Highway

Datum: NAD83
Quad Name / ITM: Chandalar D-6
AWC Stream #:
Stream Name: Dietrich River tributary

Elevation:

Site Comments: None

Survey Date: Aug 22, 2010

Survey EDS10-DAL17

Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Woody Debris
  3. Culvert is poorly aligned
  4. Mechanical damage or joints parting

Comments: All flow in pipe 2 at time of survey

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 71.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 3
Approach Angle: 51.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):5.0 4.9
Height(ft):0.4 5.2
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.0
Substrate Depth(ft):4.6 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type:
Constriction Ratio: 0.71
Culvert Gradient: -0.24%
Max Slope:
Max Slope Length:
 

Comments: Inlet of pipe 1 plugged with woody debris; no flow through pipe 1.
  Culvert Observations:
  1. Woody Debris
  2. Culvert is poorly aligned
  3. Mechanical damage or joints parting
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 70.5
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 51.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.3 9.0
Height(ft):8.0 6.5
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.7
Rustline Height(ft):1.4
Substrate Depth(ft):1.0 2.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 4.22%
Max Slope:
Max Slope Length:
 

Comments: All flow through pipe 2; GRD is only for section between tops of miters (enclosed pipe). Length of pipe is total length.
  Culvert Observations:
  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Mechanical damage or joints parting
ID: 3 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 55.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 51.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):9.0 9.0
Height(ft):6.8 6.0
Apron Length(ft): 7.0
Water Depth(ft): 0.0
Rustline Height(ft):0.8
Substrate Depth(ft):2.2 3.0
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.2
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 3.98%
Max Slope:
Max Slope Length:
 

Comments: No flow in pipe 3; Length of pipe is from TOP of pipe inlet and outlet since mitered end of inlet could not be found,GRD is only for section between tops of miters which is 55'; inlet of pipe 3 bent and plugged by woody debris; unable to measure pipe 3 inlet apron length - inlet buried by woody debris.
  Culvert Observations:
  1. Culvert is poorly aligned
  2. Mechanical damage or joints parting
  3. Culvert gradient red
ID: 4 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 71.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 51.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.8 4.7
Height(ft):2.4 2.6
Apron Length(ft):
Water Depth(ft): 0.0
Rustline Height(ft):0.0
Substrate Depth(ft):2.6 2.4
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.4
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 3.03%
Max Slope:
Max Slope Length:
 

Comments: No flow through pipe.
  Culvert Observations:
  1. Culvert is poorly aligned
  2. Mechanical damage or joints parting
  3. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSand
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 68.0 12.00
Upstream ordinary high water 113.0 11.50
Upstream ordinary high water 194.0 14.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Culvert Top (dry overflow pipe) 1 96.89
Inlet Culvert Top 4 97.79
Road Elev 103.00
D/S Water Surface Elev 2 0.00 91.31
D/S Thalweg (no TWC below pipe 2 in channel) 2 0.00 90.73
D/S Water Surface Elev (TWS, =ws @ outlet) 2 13.00 91.56
Outlet Invert (on substrate below top of miter) 3 20.00 91.64
Outlet Invert (taken directly below top of miter (length of pipe also taken here)) 2 20.00 90.99
Outlet Culvert Top 4 20.00 94.76
Outlet Culvert Top 3 20.00 97.74
Outlet Culvert Top 2 20.00 97.75
Inlet Culvert Top 3 75.00 99.93
Inlet Culvert Top (end of mitered section) 2 75.00 100.07
Inlet Culvert Top 1 75.00 96.72
Inlet Culvert Invert (on subs) 2 75.00 91.94
Inlet Culvert Invert (on subs) 3 75.00 92.75
U/S Headwater 2 83.00 92.91

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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