Fish Passage Site 10302163

Coordinates (dec. deg.): 58.35802°, -134.52301°
Legal Description: C040S066E33
Region: Southeast
Road Name: Egan Drive

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: West Creek

Elevation:

Site Comments: No traps were set as creek is already in the AWC. Juvenile salmonids observed upstream and downstream of pipe. 15 feet upstream of invert in stream channel becomes a ditch drain system through another culvert under Glacier Highway with a large degree of mechanical influence and downstream quickly becomes a tidal marsh making it impossible to get a stream gradient, however downstream stream widths were taken to aproximate a mean channel width in the marsh.

Survey Date: Jul 19, 2011

Survey SEA11-EGN03

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

Overall Fish Passage Rating: Gray

Tidal: Yes
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Compound gradient in pipe

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Gray
 
Length(ft): 223.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.33
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 8.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Sand
InletOutlet
Width(ft):10.0 10.0
Height(ft):5.8 5.6
Apron Length(ft):
Water Depth(ft): 0.72
Rustline Height(ft):
Substrate Depth(ft):4.2 4.4
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 4.2
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.79
Culvert Gradient: 0.59%
Max Slope: 13.3
Max Slope Length: 9.0
  Culvert Observations:
  1. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelSand
Subdominant:SandSilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 166.0 3.90
Downstream ordinary high water 191.0 6.10
Downstream ordinary high water 243.0 4.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 0.00 93.69
D/S Water Surface Elev 0.00 94.03
Outlet Pool Water Elev 9.00 94.05
Max Pool Depth 9.00 93.13
Outlet Thalweg (Invert out, on substrate) 15.00 93.33
D/S Water Surface Elev (Invert out) 15.00 94.05
Outlet Culvert Top (Invert out, on metal) 15.00 98.13
U/S Grade Ctrl (Thalweg) (Inside pipe, max grade point, end of step riffle) 224.00 94.13
U/S Water Surface Elev (Inside pipe) 224.00 94.48
U/S Grade Ctrl (Thalweg) (Inside pipe, max grade point, top of riffle) 233.00 94.90
U/S Water Surface Elev (Inside pipe) 233.00 95.33
U/S Headwater (Invert in, 1st resting) 239.00 95.34
Inlet Thalweg (Invert in, on substrate) 239.00 94.65
Inlet Culvert Top (Invert in, on metal) 239.00 99.38

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: Visual observation
 
Gear Type: Visual Observation, Ground (B) Trap Duration(h): 30.0
Channel Type: Main Channel (>50% of water flow)
Comments: Visual observation

Fish Observations

Species: juvenile salmonid-unspecified Life History: Unknown
Total Fish Observed: 0 Fish Measured: 0 Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Visual Observation, Ground (0)  Upstream Visual Observation, Ground (0)  

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