Fish Passage Site 20300930

Coordinates (dec. deg.): 60.49313°, -149.84393°
Legal Description: S005N003W29
Region: South Central
Road Name: Ptarmigan Place

Datum: NAD83
Quad Name / ITM: Seward B-8
AWC Stream #: 244-30-10010-2169
Stream Name: Bean Creek

Elevation:

Site Comments: Site 20300931 148.5 feet downstream.

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 KEN18-BCPP1

Observers: Maggie Harings, Madeleine Tucker, Rachel Smaby, Chelsea Pardo

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2010


Site Observations:

  1. Culvert gradient red

Comments: Culvert assessment and photos submitted by Kenai Watershed Forum. Cuvlert replaced in 2010. Potetial fish barrier 40 ft downstream with water under land bridge. Stream gradients taken over short distance, upstream gradient 1.65%, downstream gradient 4.64%.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 49.5
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 1.2
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):7.35 7.1
Height(ft):5.45 5.5
Apron Length(ft):
Water Depth(ft): 0.34
Rustline Height(ft):0.8
Substrate Depth(ft):0.5 0.8
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.21
Culvert Gradient: 4.58%
Max Slope:
Max Slope Length:
 

Comments: Top of culvert length 45.2 ft. Water surface gradient through culvert 3.78%
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 57.0 4.10
Downstream ordinary high water 70.0 5.25
Downstream ordinary high water 89.0 5.60
Upstream ordinary high water 162.0 5.50
Upstream ordinary high water 188.0 5.21
Upstream ordinary high water 207.0 6.40
Upstream ordinary high water 239.0 7.23

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 32.00 91.98
D/S Water Surface Elev 32.00 92.35
D/S Grade Ctrl (Thalweg) 49.00 92.58
D/S Water Surface Elev 49.00 93.00
D/S Water Surface Elev 55.00 93.13
D/S Thalweg (Max pool depth) 55.00 91.34
D/S Water Surface Elev 67.00 93.48
D/S Thalweg (Max pool depth) 67.00 92.73
D/S Grade Ctrl (Thalweg) (Top of riffle) 72.00 94.38
D/S Water Surface Elev 72.00 94.69
D/S Thalweg 86.00 94.65
D/S Water Surface Elev 86.00 94.86
D/S Tailcrest or 1st Thalweg 97.00 94.91
D/S Water Surface Elev 97.00 95.13
D/S Water Surface Elev 98.00 95.15
Max Pool Depth 98.00 94.78
Outlet Invert (on substrate) 100.00 94.87
Outlet Culvert Top 100.00 100.00
D/S Water Surface Elev 100.00 95.21
Outlet Invert (On corrugation) 100.00 94.35
Inlet Culvert Invert (on top of corrugation) 145.00 96.42
Inlet Culvert Invert (on substrate) 145.00 96.60
U/S Water Surface Elev 145.00 96.92
U/S Grade Ctrl (Thalweg) 155.00 97.09
U/S Water Surface Elev 155.00 97.31
U/S Thalweg 177.00 97.64
U/S Water Surface Elev 177.00 97.75
U/S Water Surface Elev 182.00 97.71
U/S Thalweg (max pool depth) 182.00 97.46
U/S Water Surface Elev 190.00 97.83
U/S Thalweg 190.00 97.22
U/S Thalweg 203.00 97.89
U/S Water Surface Elev 203.00 98.10

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): 4.0
Comments: Trap set about 60 feet upstream.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 4.0833335
Comments: Trap set about 43 feet downstream.

Fish Observations

Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 6 Fish Measured: 6 Fork Lengths (mm) Min: 88 Max: 118 Mean: 99
Collected/Observed by Gear Type: Downstream Minnow Trap (6)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 2 Fish Measured: 2 Fork Lengths (mm) Min: 73 Max: 115 Mean: 94
Collected/Observed by Gear Type: Downstream Minnow Trap (2)  

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