Fish Passage Site 10103521

Coordinates (dec. deg.): 55.69104°, -132.87512°
Legal Description: C071S082E29
Region: Southeast
Road Name: Big Salt Lake Road

Datum: NAD83
Quad Name / ITM: Craig C-3
AWC Stream #: 102-70-10580-2035-3013-4042
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Jun 22, 2017

Survey SEA17-BSL04

Observers: Elizabeth Flory, Kelly Petty

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient gray

Comments: Clearcut upstream. 500ft upstream of Control Lake. Downstream gradient similar to culvert. Upstream gradient steeper with log steps and gravel control points. Lots of gravel at inlet. Culvert does not appear to be a barrier. But there is aggradation at inlet from the steeper sloped creek coming into a lower gradient culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 105.1
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 13.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):8.0 8.0
Height(ft):5.0 5.8
Apron Length(ft):
Water Depth(ft): 0.25
Rustline Height(ft):0.5
Substrate Depth(ft):3.0 2.2
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.2
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 3.05
Culvert Gradient: 0.52%
Max Slope:
Max Slope Length:
 

Comments: Upstream gradient steeper than downstream. Large sediment wedge at inlet with heavy vegitation likely due to the steeper upstream gradient coming into a lower gradient cuvlert. Top of culvert length 94.1.
  Culvert Observations:
  1. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleOrganic
Stream Slope(deg.):9.54
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 20.0 2.75
Upstream ordinary high water 40.0 2.50
Upstream ordinary high water 100.0 2.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 109.01
D/S Grade Ctrl (Thalweg) 0.00 92.54
D/S Water Surface Elev 0.00 92.76
D/S Tailcrest or 1st Thalweg 8.00 93.16
D/S Water Surface Elev 8.00 93.67
D/S Water Surface Elev 24.00 93.84
Max Pool Depth 24.00 93.33
Outlet Invert (On substrate, est. end mitre) 27.00 93.94
D/S Water Surface Elev 27.00 94.19
Outlet Culvert Top 34.00 100.00
Inlet Culvert Top 128.10 100.49
U/S Water Surface Elev 132.10 95.67
Inlet Culvert Invert (On substrate, est. end mitre) 132.10 94.58
U/S Grade Ctrl (Thalweg) 138.00 95.02
U/S Water Surface Elev 138.00 95.34
U/S Grade Ctrl (Thalweg) 165.00 96.27
U/S Water Surface Elev 165.00 97.46
U/S Grade Ctrl (Thalweg) 221.00 102.87
U/S Water Surface Elev 221.00 103.26

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): 1.7
Comments: 10ft upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.7
Comments: 20 ft downstream

Fish Observations

Species: juvenile Dolly Varden Life History:
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 110 Max: 120 Mean: 115
Collected/Observed by Gear Type: Upstream Minnow Trap (2)  

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