Fish Passage Site 10302228

Coordinates (dec. deg.): 58.52921°, -134.78926°
Legal Description: C038S064E35
Region: Southeast
Road Name: Herbert River Road

Datum: NAD83
Quad Name / ITM: Juneau C-3
AWC Stream #:
Stream Name: Herbert River tributary

Elevation:

Site Comments: None

Survey Date: Jul 06, 2011

Survey SEA11-HRT01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Jason Olds, Charmagne Gutierrez, Gillian O'Doherty

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Hydraulic flows exceeded capacity
  3. Woody Debris
  4. Culvert gradient gray
  5. Inlet perch

Comments: Tar coating on invert in, inside pipe. Rustline may be backwatered from Herbert River. Gradient on inverts ~0.64% while tops of pipe ~1.91% . Likely passes fish except for inlet perch which is high due to sedimentation.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 45.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.33
Corrugation Width(in.): 2.5
Condition Rating(1-5): 4
Approach Angle: 20.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Sand
InletOutlet
Width(ft):3.8 3.8
Height(ft):4.0 4.0
Apron Length(ft):
Water Depth(ft): 0.37
Rustline Height(ft):1.3
Substrate Depth(ft):0.0 0.4
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.36
Culvert Gradient: 0.64%
Max Slope:
Max Slope Length:
 

Comments: Tar coatingon inlet.
  Culvert Observations:
  1. Constriction ratio red
  2. Hydraulic flows exceeded capacity
  3. Woody Debris
  4. Culvert gradient gray
  5. Inlet perch

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:OrganicSand
Stream Slope(deg.):0.32
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 42.0 12.40
Upstream ordinary high water 53.0 10.30
Upstream ordinary high water 59.0 8.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 103.17
D/S Grade Ctrl (Thalweg) 0.00 94.08
D/S Water Surface Elev 0.00 94.24
D/S Grade Ctrl (Thalweg) 3.00 95.31
D/S Water Surface Elev 3.00 95.37
D/S Tailcrest or 1st Thalweg 9.00 95.62
D/S Water Surface Elev 9.00 95.71
Outlet Pool Water Elev 9.50 95.66
Max Pool Depth 9.50 95.27
Outlet Thalweg (Invert out, on substrate) 10.00 95.30
D/S Water Surface Elev (Invert out) 10.00 95.67
Outlet Culvert Top (Invert out, on metal) 10.00 98.57
Inlet Culvert Top (Invert in) 55.00 99.43
U/S Headwater (Invert in, 1st resting) 55.00 96.20
Inlet Culvert Invert (Invert in, on metal) 55.00 95.59
U/S Water Surface Elev (Stream gradient start) 95.00 96.21
U/S Water Surface Elev (Stream gradient end) 229.00 96.65

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

Gear Type: Minnow Trap (A) Trap Duration(h): 2.0
Comments: No fish traps
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: No fish captured or observed.

Fish Observations

No fish observations occurred during this survey.

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