Fish Passage Site 20203738

Coordinates (dec. deg.): 60.15498°, -149.42961°
Legal Description: S001N001W27
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10080-2010-3029-4015
Stream Name: Unnamed

Elevation:

Site Comments: Site is a driveway off of Clear Creek Rd right before intersection with Old Exit Glacier Road

Survey Date: Aug 10, 2017

Survey KEN17-84_2007

Observers: Louis Mitchell, Luke Violette, Mary Richardson

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: Maybe

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red

Comments: KWFRES_17_22. Culvert assessment performed and submitted by Kenai Watershed Forum. Upstream stream gradient for stream #1 is 0.46% and for stream #2 is -0.03% or flat. Two streams come together directly upstream from culvert. Downstream OHW were used for Constriction. Water looks flat on both sides, no through culvert photo to verify and water surface elevations higly variable in survey, but site might be backwatered. Rated gray, but might be green if backwatered.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 28.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 30.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: None
InletOutlet
Width(ft):3.5 3.0
Height(ft):2.0 3.0
Apron Length(ft):
Water Depth(ft): 1.02
Rustline Height(ft):0.75
Substrate Depth(ft):0.5 0.0
Backwatered?: Maybe
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.48
Culvert Gradient: -0.76%
Max Slope:
Max Slope Length:
 

Comments: Water surface elevations at outlet higher than inlet. Sediment at inlet, invert gradients 2.5%.
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:SandSand
Stream Slope(deg.):0.17
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 20.0 9.00
Downstream ordinary high water 40.0 5.50
Downstream ordinary high water 60.0 7.25

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.65
D/S Thalweg (Water surface elevations highly variable.) 0.00 97.49
D/S Water Surface Elev 0.00 98.08
D/S Grade Ctrl (Thalweg) 35.00 97.89
D/S Water Surface Elev 35.00 98.20
D/S Thalweg 40.00 98.01
D/S Water Surface Elev 40.00 98.25
D/S Water Surface Elev 70.00 98.20
D/S Thalweg 70.00 97.48
Max Pool Depth 90.00 97.12
Outlet Pool Water Elev 90.00 98.27
Outlet Culvert Top 100.00 100.15
Outlet Invert (on pipe) 100.00 97.13
D/S Water Surface Elev 100.00 98.15
U/S Water Surface Elev 128.80 98.11
Inlet Culvert Invert (on substrate) 128.80 97.85
Inlet Culvert Top 128.80 99.93
U/S Water Surface Elev 130.80 98.17
U/S Thalweg (max depth of inlet pool) 130.80 97.54
U/S Thalweg (Stream #1 profile) 150.80 98.03
U/S Water Surface Elev 150.80 98.29
U/S Water Surface Elev 175.80 98.28
U/S Thalweg (Stream #2 profile) 175.80 97.63
U/S Grade Ctrl (Thalweg) 218.80 98.33
U/S Water Surface Elev 218.80 98.45
U/S Water Surface Elev 220.80 98.29
U/S Thalweg 220.80 97.62
U/S Thalweg 235.80 98.16
U/S Water Surface Elev 235.80 98.54
U/S Water Surface Elev 250.00 98.25
U/S Thalweg 250.80 98.53
U/S Water Surface Elev 250.80 98.75
U/S Thalweg 250.80 97.85

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): 1.1
Comments: Trap set about 90 feet downstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0

Fish Observations

Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 50 Max: 50 Mean: 50
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  

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