Fish Passage Site 10103559

Coordinates (dec. deg.): 55.87445°, -133.04639°
Legal Description: C069S081E19
Region: Southeast
Road Name: Coffman Cove Road

Datum: NAD83
Quad Name / ITM: Craig D-4
AWC Stream #: 106-30-10670-2004-3030-4060-5016
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 07, 2017

Survey SEA17-CVR10

Observers: Mark Eisenman, Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Comments: TWC higher than inlet invert water surface, gradient equal. Backwatered. Fish observed upstream and downstream but none captured.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 102.2
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 6.5
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: Organic
Outlet Substrate: Organic
InletOutlet
Width(ft):9.0 9.0
Height(ft):5.6 5.8
Apron Length(ft):
Water Depth(ft): 0.9
Rustline Height(ft):
Substrate Depth(ft):3.4 3.2
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 3.2
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.83
Culvert Gradient: -0.60%
Max Slope:
Max Slope Length:
 

Comments: Backwatered. Top of culvert length 90.2.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:GravelGravel
Stream Slope(deg.):0.28
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 100.0 3.00
Downstream ordinary high water 150.0 3.20
Downstream ordinary high water 200.0 3.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 115.59
D/S Water Surface Elev 0.00 94.50
D/S Grade Ctrl (Thalweg) 0.00 94.35
D/S Water Surface Elev 23.00 94.60
D/S Tailcrest or 1st Thalweg 23.00 94.54
D/S Water Surface Elev 34.00 94.55
Max Pool Depth 34.00 93.65
Outlet Invert (On substrate) 37.00 94.05
D/S Water Surface Elev 37.00 94.40
Outlet Culvert Top 43.00 100.00
Inlet Culvert Top 133.20 99.46
Inlet Culvert Invert (On substrate, 1st resting) 139.20 93.55
U/S Water Surface Elev 139.20 94.05
U/S Water Surface Elev 168.20 94.75
U/S Grade Ctrl (Thalweg) 168.20 94.83
U/S Water Surface Elev 187.20 95.30
U/S Grade Ctrl (Thalweg) (Large Woody debris) 187.20 95.40
U/S Grade Ctrl (Thalweg) 261.20 97.10
U/S Water Surface Elev 261.20 97.35

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): 1.6
Comments: no fish caught though some observed
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.6
Comments: no fish caught but observed some

Fish Observations

No fish observations occurred during this survey.

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