Fish Passage Site 10302215

Coordinates (dec. deg.): 58.39739°, -134.74889°
Legal Description: C040S065E18
Region: Southeast
Road Name: Glacier Highway

Datum: NAD83
Quad Name / ITM: Juneau B-3
AWC Stream #:
Stream Name: Lena Cove tributary

Elevation:

Site Comments: None

Survey Date: Jul 12, 2011

Survey SEA11-GLH11

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Constriction ratio gray
  3. Woody Debris

Comments: No traps were set as stream is already in the AWC. Highly impounded channel. Measurements of inlet are aproximated from outlet measurements as inlet was burried by a woody debri pile. Special condition where aproach was actually on a back-angle and therefor greater than 90 degrees. Vast majority of flow coming from ditch/drain, there is a dry channel they may have carried more flow at one time in line with the culvert however it apears the flow has switched somewhere upstream. One ~150mm Dolly Varden observed upstream of culvert. There is nice habitat upstream however it may terminate ~100 feet from invert in at cascade, may not be a barrier for some fishes.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 91.1
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.33
Corrugation Width(in.): 2.5
Condition Rating(1-5): 2
Approach Angle: 128.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.9 2.9
Height(ft):2.9 2.9
Apron Length(ft):
Water Depth(ft): 0.5
Rustline Height(ft):0.7
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: 0.51
Culvert Gradient: 6.44%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio gray
  3. Woody Debris

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:CobbleOrganic
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 23.0 4.60
Downstream ordinary high water 44.0 5.50
Downstream ordinary high water 61.0 6.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) 0.00 86.60
D/S Water Surface Elev 0.00 86.76
D/S Tailcrest or 1st Thalweg 5.00 86.97
D/S Water Surface Elev 5.00 87.23
Max Pool Depth 8.00 86.86
Outlet Pool Water Elev 8.00 87.23
Outlet Culvert Top (Invert out, on metal) 9.00 89.79
Outlet Thalweg (Invert out, on substrate) 9.00 86.73
D/S Water Surface Elev (Invert out) 9.00 87.23
Inlet Culvert Top (Invert in, on metal) 100.00 95.66
U/S Headwater (1st resting may be closer to pipe, too much woody debris to survey closer to the invert) 109.00 92.94
Misc. (Upstream survey point) 135.00 94.14
U/S Water Surface Elev 135.00 94.65

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

Fish Observations

Species: Dolly Varden Life History: Unknown
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 150 Max: 150 Mean: 150
Collected/Observed by Gear Type: Upstream Visual Observation, Ground (1)  

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