Fish Passage Site 10302231

Coordinates (dec. deg.): 58.52069°, -134.79390°
Legal Description: C039S064E02
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: Jun 23, 2011

Survey SEA11-HET01

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: No

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: Near 90 degree approach. Small fry salmonids spotted upstream of pipe, likely Coho. Small amount of damage to inlet. Small riffle grade in middle of pipe visible but not surveyable. Insufficent points taken for stream grade.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Green
 
Length(ft): 31.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 72.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.0 3.0
Height(ft):3.0 3.0
Apron Length(ft):
Water Depth(ft): 0.14
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.9
Culvert Gradient: -0.44%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelSilt/Clay
Subdominant:OrganicGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 15.0 3.20
Upstream ordinary high water 20.0 2.90
Upstream ordinary high water 39.0 3.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Grade Ctrl (Thalweg) 0.00 94.17
D/S Water Surface Elev 0.00 94.39
D/S Water Surface Elev 27.00 94.40
D/S Tailcrest or 1st Thalweg 27.00 94.34
Outlet Pool Water Elev 38.00 94.40
Max Pool Depth 38.00 93.35
D/S Water Surface Elev 44.00 94.40
Outlet Invert (on metal) 44.00 94.26
Outlet Culvert Top 44.00 97.26
Inlet Culvert Top 75.50 97.15
U/S Water Surface Elev 75.50 94.76
Inlet Culvert Invert 75.50 94.12
U/S Thalweg 87.50 94.18
U/S Water Surface Elev 87.50 94.79

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) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Unidentified salmonids, likely coho, observed upstream from culvert.
 
Gear Type: (B)

Fish Observations

No fish observations occurred during this survey.

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