Fish Passage Site 10302230

Coordinates (dec. deg.): 58.52257°, -134.79340°
Legal Description: C039S064E02
Region: Southeast
Road Name: Glacier Highway

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

Elevation:

Site Comments: No traps set as stream is already in the AWC. Very high amount of organic debris, swampy. Very low or near 0% stream gradient.

Survey Date: Jun 25, 2011

Survey SEA11-GLH06

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red

Comments: No traps set as stream is already in the AWC. Very high amount of organic debris, swampy. Very low or near 0% stream gradient.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 81.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 4.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Boulder
InletOutlet
Width(ft):5.0 5.0
Height(ft):3.6 3.6
Apron Length(ft):
Water Depth(ft): 1.55
Rustline Height(ft):0.1
Substrate Depth(ft):1.4 1.4
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.4
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.47
Culvert Gradient: 0.73%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0.16
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 60.0 10.30
Upstream ordinary high water 80.0 11.20
Upstream ordinary high water 100.0 10.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.96
D/S Tailcrest or 1st Thalweg 0.00 92.50
D/S Water Surface Elev 0.00 92.51
Max Pool Depth 52.00 90.49
Outlet Pool Water Elev 52.00 92.54
D/S Water Surface Elev (Invert out) 64.00 92.54
Outlet Invert (Invert out) 64.00 90.99
Outlet Culvert Top (Invert out, on metal) 64.00 94.20
Inlet Culvert Top (Invert in) 145.10 94.79
Inlet Culvert Invert (Invert in) 145.10 91.52
U/S Water Surface Elev (Invert in) 145.10 92.53
U/S Grade Ctrl (Thalweg) 169.10 92.54
U/S Water Surface Elev 169.10 92.58
U/S Grade Ctrl (Thalweg) 410.10 92.90
U/S Water Surface Elev 410.10 92.92

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: None (A)
Comments: No traps set, no fish observed.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov