Fish Passage Site 10302229

Coordinates (dec. deg.): 58.52148°, -134.79213°
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: None

Survey Date: Jun 25, 2011

Survey SEA11-GLH07

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. Beaver Activity
  2. Culvert is poorly aligned

Comments: No traps were set as area is already in the AWC. Juvenile coho were observed upstream and downstream of culvert. Backwatered from somewhere far downstream. Active beaver in area. Nearly right angle approach. Ordinary high water measurement difficult to obtain as system is ponded on both sides of culvert, likely from beavers. Both upstream and downstream were muskeg/bog.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 89.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 86.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.0 5.0
Height(ft):3.6 4.0
Apron Length(ft):
Water Depth(ft): 2.82
Rustline Height(ft):
Substrate Depth(ft):1.4 1.0
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.95%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity
  2. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:High

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 103.32
Misc. (Downstream profile point, ponded. On substrate) 0.00 97.65
D/S Water Surface Elev 0.00 99.47
Outlet Invert (Invert out, on substrate) 2.00 96.71
D/S Water Surface Elev (Invert out) 2.00 99.53
Outlet Culvert Top 2.00 100.00
Inlet Culvert Top 91.10 100.85
U/S Water Surface Elev (Invert in) 91.10 99.52
Inlet Culvert Invert (Invert in, on substrate) 91.10 97.65
Misc. (Upstream profile point, ponded. On substrate) 104.10 97.74
U/S Water Surface Elev 104.10 99.52

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: Visual Observation, Ground (A)
Comments: Juvenile Coho observed.
 
Gear Type: Visual Observation, Ground (B)
Comments: Juvenile Coho 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