Fish Passage Site 10103562

Coordinates (dec. deg.): 55.53130°, -132.98584°
Legal Description: C073S082E20
Region: Southeast
Road Name: Hollis Klawock Road

Datum: NAD83
Quad Name / ITM: Craig C-3
AWC Stream #: 103-60-10470-2071
Stream Name: Threemile Creek

Elevation:

Site Comments: Near Mile post 12

Survey Date: Jul 28, 2017

Survey SEA17-HLK02

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height red
  2. Culvert gradient red

Comments: Deep outlet pool over 5 feet deep and 90 feet long. Culvert 2 taking more flow at all flow levels and had about twice the flow of culvert 1. Hiked creek about 700 feet upstrea. Nice 4' deep pools and long gravel runs. Juvenile salmonids, most likely coho, observed all the way up. Water depth inside of culverts at lower flows might impede adult passage

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 76.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):15.3 15.25
Height(ft):9.1 9.0
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.5
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 1.62%
Max Slope:
Max Slope Length:
 

Comments: Outfall height estimated using known surveyed elevations and culvert measurments
  Culvert Observations:
  1. Outfall height red
  2. Culvert gradient gray
ID: 2 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Red
 
Length(ft): 76.5
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle: 5.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):15.3 15.3
Height(ft):9.1 9.0
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):2.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 1.0
Outfall Type: Free Fall In To Pool
Constriction Ratio:
Culvert Gradient: 0.79%
Max Slope:
Max Slope Length:
 

Comments: Outfall height visually observed to be over 4 inches.
  Culvert Observations:
  1. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 90.0 30.00
Upstream ordinary high water 50.0 23.00
Upstream ordinary high water 60.0 25.00
Upstream ordinary high water 80.0 35.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 114.61
D/S Grade Ctrl (Thalweg) 0.00 97.23
D/S Water Surface Elev 0.00 98.74
D/S Water Surface Elev 53.00 99.11
D/S Tailcrest or 1st Thalweg 53.00 98.62
Max Pool Depth (Not quite the deepest part, deepest part of pool est. to be about 1' deeper) 2 133.00 95.38
Outlet Pool Water Elev 2 133.00 99.51
Outlet Pool Water Elev 1 138.00 99.46
Max Pool Depth 2 138.00 95.25
Outlet Culvert Top 2 158.00 109.13
Outlet Culvert Top 1 166.00 109.10
Inlet Culvert Top 2 234.50 109.92
Inlet Culvert Invert 2 234.50 100.79
U/S Water Surface Elev 2 234.50 101.74
U/S Water Surface Elev 2 240.50 102.10
U/S Grade Ctrl (Thalweg) 2 240.50 101.45
U/S Water Surface Elev 1 242.00 101.66
Inlet Culvert Invert 1 242.00 100.66
Inlet Culvert Top 1 242.00 110.33
U/S Grade Ctrl (Thalweg) 250.00 101.25
U/S Water Surface Elev 250.00 101.79
U/S Grade Ctrl (Thalweg) 290.00 101.94
U/S Water Surface Elev 290.00 102.74

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): 2.0
Comments: Trap set about 10 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 4 Fish Measured: 4 Fork Lengths (mm) Min: 43 Max: 86 Mean: 55
Collected/Observed by Gear Type: Upstream Minnow Trap (4)  

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