Fish Passage Site 20303807

Coordinates (dec. deg.): 60.52432°, -149.64348°
Legal Description: S005N002W16
Region: South Central
Road Name: Sterling Highway

Datum: NAD83
Quad Name / ITM: Seward C-8
AWC Stream #: 244-30-10010-2177-3022
Stream Name: Unnamed

Elevation:

Site Comments: Creek is a tributary to Quarz Creek

Survey Date: Aug 31, 2018

Survey KEN18-UCSH2

Observers: Maggie Harings, Alice Main

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Improper bedding
  3. Shallow fill; inadequate roadfill volume above culvert

Comments: Culvert assessment and photos submitted by the Kenai Watershed Forum. No fish captured or observed.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 114.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.2 2.9
Height(ft):2.93 2.12
Apron Length(ft):
Water Depth(ft): 0.1
Rustline Height(ft):0.8
Substrate Depth(ft):0.1 0.9
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.63
Culvert Gradient: 0.28%
Max Slope:
Max Slope Length:
 

Comments: Culvert height calculated from elevational data. Substrate depth is estimated from measured elevations and circumference of the culvert. Culvert gradient calcualted using top of culvert elevations.
  Culvert Observations:
  1. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySand
Subdominant:GravelGravel
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 10.0 3.40
Downstream ordinary high water 21.0 2.60
Downstream ordinary high water 39.0 2.50
Upstream ordinary high water 20.0 3.20
Upstream ordinary high water 35.0 5.50
Upstream ordinary high water 40.0 7.00
Upstream ordinary high water 65.0 4.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 103.87
D/S Grade Ctrl (Thalweg) 45.00 94.80
D/S Water Surface Elev 45.00 95.09
D/S Water Surface Elev 51.00 95.14
D/S Grade Ctrl (Thalweg) 51.00 94.94
Outlet Invert (on substrate) 64.00 95.23
D/S Water Surface Elev 64.00 95.33
Outlet Culvert Top 64.00 97.35
Inlet Culvert Top 178.00 97.67
U/S Water Surface Elev 178.00 95.47
Inlet Culvert Invert 178.00 94.74
U/S Grade Ctrl (Thalweg) 188.00 95.79
U/S Water Surface Elev 188.00 95.96
U/S Thalweg 198.00 96.38
U/S Water Surface Elev 198.00 96.57
U/S Water Surface Elev 218.00 96.73
U/S Thalweg (max pool depth) 218.00 95.25
U/S Water Surface Elev 222.00 96.74
U/S Grade Ctrl (Thalweg) 222.00 96.23
U/S Water Surface Elev 227.00 96.72
U/S Thalweg (max pool depth) 227.00 94.57

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): 1.25
Comments: Trap set about 45 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.1666667
Comments: Trap set about 100 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