Fish Passage Site 10302197

Coordinates (dec. deg.): 58.32273°, -134.61598°
Legal Description: C041S066E09
Region: Southeast
Road Name: North Douglas Highway

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

Elevation:

Site Comments: None

Survey Date: Jun 08, 2011

Survey SEA11-NDH02

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Upstream barrier is approximately 23 feet from the inlet. It is caused by a large log across the stream approximately 3.5 to 4.0 high. Upstream of barrier is a step pool complex . Ordinary high water is approximately 6 feet, however, active channel is approximately 3 feet. Downstream there is a long outlet pool that is most likely man made. Distance to salt water at Fritz Cove is approximately 300 feet from outlet. Downstream consists of riffle runs and pools.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 92.04
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 21.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.5 4.6
Height(ft):4.5 4.5
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.58
Rustline Height(ft):1.35
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: 0.76
Culvert Gradient: 10.77%
Max Slope:
Max Slope Length:
 

Comments: U/S barrier about 23' from inlet, caused by large log across stream about 3.5 to 4 feet high. U/S from barrier nice step pool complex. OHW about 6.0 but active channel is probably about 3 feet. D/S large outlet pool, most likely man-made. Distance to saltwater (Fritz Cove) is about 300 feet from outlet. D/S portion consists of riffle runs and pools. 3 USGS survey markers in D/S area.
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleBoulder
Subdominant:BoulderCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 41.0 4.90
Upstream ordinary high water 84.0 6.80
Upstream ordinary high water 116.0 6.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 120.77
D/S Grade Ctrl (Thalweg) 0.00 91.98
D/S Water Surface Elev 0.00 92.28
D/S Water Surface Elev 33.50 95.33
D/S Tailcrest or 1st Thalweg 33.50 94.91
Outlet Pool Water Elev 38.50 95.34
Max Pool Depth 38.50 93.80
Misc. (Substrate directly below invert out) 41.50 94.06
Outlet Invert 41.50 94.74
Outlet Culvert Top 41.50 99.22
D/S Water Surface Elev 41.50 95.32
Inlet Culvert Top 133.54 109.14
Inlet Culvert Invert 133.54 104.65
U/S Water Surface Elev 133.54 104.84
U/S Grade Ctrl (Thalweg) (1st resting habitat) 136.54 105.41
U/S Water Surface Elev 136.54 105.60

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: None (A)
Comments: No traps set no fish observed.

Fish Observations

No fish observations occurred during this survey.

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