Fish Passage Site 10103525

Coordinates (dec. deg.): 55.67934°, -132.89731°
Legal Description: C071S082E30
Region: Southeast
Road Name: Big Salt Lake Road

Datum: NAD83
Quad Name / ITM: Craig C-3
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: Stream gets steeper upstream of beaver dam. Trout in upstream trap.

Survey Date: Jun 26, 2017

Survey SEA17-BSL08

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity

Comments: Beaver dam 130ft upstream. Beaver dam 100ft downstream makes 4ft step falls. Upstream gradient 1.74%, downstream gradient 0.72%

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 107.0
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 40.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):9.0 10.0
Height(ft):7.0 7.5
Apron Length(ft):
Water Depth(ft): 0.21
Rustline Height(ft):2.5
Substrate Depth(ft):2.0 2.5
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.56
Culvert Gradient: 0.27%
Max Slope:
Max Slope Length:
 

Comments: 40 degree approach but streams bends back 45 degrees in the other direction after 50ft. Quite rusty and some seams split slightly inside. Water surface gradient through culvert 0.60%. Top of culvert length 90.1'.
  Culvert Observations:
  1. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleGravel
Subdominant:GravelBoulder
Stream Slope(deg.):0.72
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 60.0 5.75
Upstream ordinary high water 80.0 5.00
Upstream ordinary high water 100.0 6.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 98.32
D/S Grade Ctrl (Thalweg) (Edge of beaver dam) 0.00 82.42
D/S Water Surface Elev 0.00 83.21
D/S Grade Ctrl (Thalweg) (Pool) 11.00 80.97
D/S Water Surface Elev 11.00 82.16
D/S Water Surface Elev 33.00 82.26
D/S Grade Ctrl (Thalweg) 33.00 82.12
D/S Grade Ctrl (Thalweg) 50.00 82.34
D/S Water Surface Elev 50.00 82.51
D/S Grade Ctrl (Thalweg) 72.00 83.53
D/S Water Surface Elev 72.00 83.73
D/S Water Surface Elev 86.00 83.87
Outlet Invert (On substrate) 86.00 83.66
Outlet Culvert Top 96.00 91.33
Inlet Culvert Top 186.00 91.57
Outlet Invert (On substrate) 193.00 84.24
U/S Water Surface Elev 193.00 84.51
U/S Grade Ctrl (Thalweg) 196.00 84.90
U/S Water Surface Elev 196.00 85.20
U/S Grade Ctrl (Thalweg) 224.00 85.24
U/S Water Surface Elev 224.00 85.64
U/S Grade Ctrl (Thalweg) (Edge of beaver pond) 230.00 85.70
U/S Water Surface Elev 230.00 85.85
U/S Grade Ctrl (Thalweg) 296.00 86.57
U/S Water Surface Elev 296.00 86.94

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): 2.7
Comments: 80ft upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.25
Comments: 30ft downstream

Fish Observations

Species: juvenile cutthroat trout Life History:
Total Fish Observed: 6 Fish Measured: 6 Fork Lengths (mm) Min: 80 Max: 110 Mean: 96
Collected/Observed by Gear Type: Downstream Minnow Trap (4)  Upstream Minnow Trap (2)  
 
Species: juvenile Dolly Varden Life History:
Total Fish Observed: 10 Fish Measured: 10 Fork Lengths (mm) Min: 90 Max: 125 Mean: 114
Collected/Observed by Gear Type: Downstream Minnow Trap (10)  

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