Fish Passage Site 20203725

Coordinates (dec. deg.): 60.11284°, -149.44388°
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: Scheffler Creek

Elevation:

Site Comments: Site is on a driveway off of 2nd Avenue. Site 118_2007 is about 60 feet downstream and site 120_2017 is about 45 feet upstream.

Survey Date: Aug 08, 2017

Survey KEN17-119_2007

Observers: Jeff Sires, Luke Violette, Louis Mitchell

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Damage associated with ice problems

Comments: KWFRES_17_15. Culvert assessment submitted by Kenai Watershed Forum. Used downstream stream gradient below last culvert on 2nd Ave and used OHW measurements below lower culvert of constriction ratio. Inlet Top elevation looks to be erroneous.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 30.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.8
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: Cobble
InletOutlet
Width(ft):2.45 2.38
Height(ft):2.29 1.87
Apron Length(ft):
Water Depth(ft): 0.32
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.01
Culvert Gradient: 3.43%
Max Slope:
Max Slope Length:
 

Comments: Water surface gradient through culvert 2.05%, invert elevation gradient 2.21%.
  Culvert Observations:
  1. Culvert gradient red
  2. Damage associated with ice problems

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):1.97
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 9.0 4.91
Downstream ordinary high water 29.0 3.75
Downstream ordinary high water 50.0 2.50
Upstream ordinary high water 6.0 3.25
Upstream ordinary high water 18.0 3.40
Upstream ordinary high water 36.0 4.58

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Driveway 8) 106.37
D/S Thalweg (Site used TBM 2 = 101.84. tied to all other sites on 2nd ave.) 0.00 101.06
D/S Water Surface Elev 0.00 101.24
D/S Thalweg 17.00 101.87
D/S Water Surface Elev 17.00 102.01
D/S Grade Ctrl (Thalweg) 43.00 102.70
D/S Water Surface Elev 43.00 102.85
D/S Water Surface Elev 59.00 102.98
D/S Thalweg 59.00 102.64
Outlet Invert 60.00 102.59
D/S Water Surface Elev 60.00 102.91
Outlet Culvert Top 60.00 104.55
Inlet Culvert Top (This elevation might be an error, most likely should be 105.59, from invert elevation and culvert measurement.) 90.40 104.59
U/S Water Surface Elev 90.40 103.53
Inlet Culvert Invert 90.40 103.26
Inlet Culvert Top (Originally recorded as 104.59. Corrected using IINV elevation and recorded opening height.) 90.40 105.59
U/S Thalweg 91.40 103.39
U/S Water Surface Elev 91.40 103.52
U/S Grade Ctrl (Thalweg) 117.40 104.36
U/S Water Surface Elev 117.40 104.72
U/S Grade Ctrl (Thalweg) 127.40 104.80
U/S Water Surface Elev 127.40 105.01
U/S Water Surface Elev 133.40 105.05
U/S Thalweg 133.40 104.49

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): 0.5
Comments: Trap set about 10 feet upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 0.5
Comments: Trap set about 15 feet downstream.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov