Fish Passage Site 20203720

Coordinates (dec. deg.): 60.11431°, -149.44389°
Legal Description: S001S001W03
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10070-2009
Stream Name: Unnamed

Elevation:

Site Comments: Culvert runs under connected driveways next to 2nd Avenue and outlet is right at intersection of 2nd Avenure and Van Buren St.

Survey Date: Jul 20, 2017

Survey KEN17-112_2007

Observers:

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Compound gradient in pipe

Comments: KWFRES_17_10. USFWS Site numbered 112_2007, 113_2007, 114_2007. Culvert assessment and photographs submitted by Kenai Watershed Forum. Site consists of one long connected culvert under multiple driveways. Once 3 separate sites all three culverts have been linked together. Clean out manhole located about halfway down culvert. Twin culverts downstream not functioning, residents report frequent flooding. Potentially many different sized culvert through run. Site is ditched upstream and downstream from culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 167.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 2
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.0 2.5
Height(ft):1.5 2.5
Apron Length(ft):
Water Depth(ft): 0.66
Rustline Height(ft):0.33
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.23
Culvert Gradient: 1.04%
Max Slope: 1.96
Max Slope Length: 109.5
 

Comments: Water surface gradient through culvert 1.19%. No substate depth recorded at inlet, but photos show substrate. TOP elevations used for culvert gradient. Max gradient from outlet invert to elevation at manhole.
  Culvert Observations:
  1. Culvert gradient red
  2. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:SandCobble
Stream Slope(deg.):1.97
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 20.0 1.50
Downstream ordinary high water 40.0 2.00
Downstream ordinary high water 60.0 3.75
Upstream ordinary high water 5.0 4.50
Upstream ordinary high water 10.0 5.00
Upstream ordinary high water 15.0 7.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (1st Driveway surface elevation) 96.96
Road Elev (3rd driveway surface elevation) 97.60
Road Elev (2nd driveway surface elevation) 97.83
D/S Thalweg (Downstream of footbridge) 0.00 91.06
D/S Water Surface Elev 0.00 91.24
D/S Grade Ctrl (Thalweg) (Upstream of footbridge) 20.00 91.28
D/S Water Surface Elev 20.00 91.50
D/S Water Surface Elev 38.00 91.65
D/S Grade Ctrl (Thalweg) 38.00 91.49
D/S Thalweg 57.00 91.92
D/S Water Surface Elev 57.00 92.06
D/S Grade Ctrl (Thalweg) 66.00 92.09
D/S Water Surface Elev 66.00 92.33
D/S Water Surface Elev 75.00 92.72
D/S Grade Ctrl (Thalweg) 75.00 92.29
D/S Grade Ctrl (Thalweg) 90.00 92.87
D/S Water Surface Elev 90.00 93.15
D/S Water Surface Elev 95.00 93.24
D/S Thalweg 95.00 92.95
Outlet Invert 100.00 92.60
D/S Water Surface Elev 100.00 93.26
Inlet Culvert Top 100.00 95.11
U/S Water Surface Elev 157.48 93.25
U/S Thalweg (elevation through manhole on pipe) 157.48 93.01
Inlet Culvert Invert 267.00 95.16
U/S Water Surface Elev 267.00 95.25
Inlet Culvert Top 267.00 96.85
U/S Water Surface Elev 270.00 95.34
U/S Thalweg 270.00 95.20
U/S Thalweg (Just downstream of next upstream driveway culvert.) 282.00 94.66
U/S Water Surface Elev 282.00 95.62

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): 1.0
Comments: Trap set about 20 feet upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: Trap set about 100 feet downstream

Fish Observations

No fish observations occurred during this survey.

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