Fish Passage Site 10302227

Coordinates (dec. deg.): 58.53052°, -134.78473°
Legal Description: C038S064E36
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-HRT02

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: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Juvenile salmonids observed upstream of culvert. Too much foilage to shoot a stream gradient.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 61.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.33
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):3.9 4.0
Height(ft):4.0 4.0
Apron Length(ft):
Water Depth(ft): 0.17
Rustline Height(ft):1.6
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: 0.78
Culvert Gradient: 1.64%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelSand
Subdominant:SandCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 35.0 5.10
Upstream ordinary high water 50.0 5.40
Upstream ordinary high water 91.0 4.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 105.54
D/S Grade Ctrl (Thalweg) (Top of riffle) 0.00 94.38
D/S Water Surface Elev 0.00 94.61
D/S Tailcrest or 1st Thalweg 5.50 94.98
D/S Water Surface Elev 5.50 95.12
Outlet Pool Water Elev 10.50 95.20
Max Pool Depth 10.50 93.39
D/S Water Surface Elev (Invert out) 11.50 95.17
Outlet Invert (on metal) 11.50 95.00
Inlet Culvert Invert 72.50 96.00
U/S Water Surface Elev 72.50 96.21
Inlet Culvert Top (on metal, benchmark) 72.50 100.00
U/S Headwater (1st resting) 73.50 96.16

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): 1.5
Channel Type: Main Channel (>50% of water flow)
Comments: Set at 30 feet upstream of invert in, Lat. 58.53061 Long. -134.78473
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.5
Channel Type: Main Channel (>50% of water flow)
Comments: Set in 70 feet downstream of invert out at Lat. 58.53053 Long. -134.78442

Fish Observations

Species: juvenile salmonid-unspecified Life History: Unknown
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 6 Max: 6 Mean: 6
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 5 Max: 5 Mean: 5
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  
 
Species: juvenile steelhead Life History: Anadromous
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 8 Max: 8 Mean: 8
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  
 
Species: juvenile Dolly Varden Life History: Unknown
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 5 Max: 6 Mean: 5
Collected/Observed by Gear Type: Downstream Minnow Trap (1)  Upstream Minnow Trap (1)  

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