Fish Passage Site 20200937

Coordinates (dec. deg.): 60.08947°, -149.35236°
Legal Description: S001S001E18
Region: South Central
Road Name: Nash Road

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10110
Stream Name: Spring Creek

Elevation:

Site Comments: None

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey KEN17-17_06

Observers: Jeff Sires, Luke Violette, Louis Mitchell

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Outfall height gray
  2. Culvert gradient red
  3. Constriction ratio red
  4. Culvert is poorly aligned
  5. Inlet apron too steep
  6. Inlet perch

Comments: KWFRES_17_06. Culvert assessment and photographs submitted by Kenai Watershed Form. HJ at outlet looks similar to 2001 assessment photos. Constriction is a big issue at this site.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 56.89
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 50.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):6.25 6.25
Height(ft):6.25 6.25
Apron Length(ft):7.0 7.0
Water Depth(ft): 0.77
Rustline Height(ft):2.5
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.38
Outfall Type: Hydraulic Jump
Constriction Ratio: 0.28
Culvert Gradient: 2.25%
Max Slope:
Max Slope Length:
 

Comments: Inlet apron slope 3.86%, outlet apron slope 2.20%.
  Culvert Observations:
  1. Outfall height gray
  2. Culvert gradient red
  3. Constriction ratio red
  4. Inlet apron too steep
  5. Culvert is poorly aligned

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSand
Stream Slope(deg.):0.56
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 200.0 26.00
Downstream ordinary high water 255.0 26.50
Downstream ordinary high water 300.0 26.00
Upstream ordinary high water 33.0 16.00
Upstream ordinary high water 93.0 24.00
Upstream ordinary high water 110.0 22.00
Upstream ordinary high water 125.0 25.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 97.43
D/S Thalweg 0.00 84.10
D/S Water Surface Elev 0.00 86.33
D/S Water Surface Elev 204.00 86.41
D/S Thalweg 204.00 84.98
D/S Thalweg 325.00 85.14
D/S Water Surface Elev 325.00 86.37
D/S Water Surface Elev 367.00 87.25
D/S Grade Ctrl (Thalweg) 367.00 86.33
Outlet Pool Water Elev 390.00 87.35
Max Pool Depth 390.00 85.97
D/S Grade Ctrl (Thalweg) (End of outlet apron) 395.00 86.89
D/S Water Surface Elev 395.00 87.41
D/S Water Surface Elev 400.00 87.77
Outlet Invert (On pipe) 400.00 87.00
Outlet Culvert Top 400.00 93.74
Inlet Culvert Top 456.89 94.81
U/S Water Surface Elev 456.89 89.46
Inlet Culvert Invert (On pipe) 456.89 88.28
U/S Grade Ctrl (Thalweg) (End of inlet apron) 463.89 88.55
U/S Water Surface Elev 463.89 89.61
U/S Water Surface Elev 467.89 89.82
U/S Thalweg 467.89 88.72
U/S Water Surface Elev 496.89 89.96
U/S Thalweg 496.89 89.19
U/S Thalweg 540.89 89.37
U/S Water Surface Elev 540.89 90.25
U/S Water Surface Elev 556.89 90.47
U/S Grade Ctrl (Thalweg) 556.89 89.18
U/S Water Surface Elev 656.89 90.76
U/S Grade Ctrl (Thalweg) 656.89 90.12
U/S Thalweg 666.89 90.06
U/S Water Surface Elev 666.89 90.94

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): 2.0
Comments: Trap set about 85 feet upstream
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.0
Comments: Trap set about 5 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