Fish Passage Site 20303744

Coordinates (dec. deg.): 60.56127°, -151.12889°
Legal Description: S006N011W36
Region: South Central
Road Name: Beaver Loop Road

Datum: NAD83
Quad Name / ITM: Kenai C-4
AWC Stream #: 244-30-10010-2025-3011
Stream Name: Unnamed

Elevation:

Site Comments: Stream is in a residential area. Large amounts of woody debris. Beaver dam 130 feet downstream.

Survey Date: May 30, 2017

Survey KEN17-BLR01

Observers: Maggie Schaffer, Elise Idle

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity

Comments: Culvert information and assessment data collected and submitted by USFWS. Stream had a high amount of woody debris present. Beaver dam approximately 130 feet downstream. Small fish were present downstream, but none trapped. A significant amount of ATV disturbance was a present at the site including leftover wood in the stream from a makeshift bridge. Overflow pipe next to culvert. Upstream stream gradient short, but upstream and downstream seem to be comparable to culvert gradient. Water surface gradient through culvert 0.22%.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 80.5
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle:
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):10.0 10.0
Height(ft):5.5 5.6
Apron Length(ft):
Water Depth(ft): 1.2
Rustline Height(ft):1.1
Substrate Depth(ft):3.0 3.0
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 4.5
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.6
Culvert Gradient: 1.00%
Max Slope:
Max Slope Length:
 

Comments: Substrate depth estimated, but greater than 3 feet.
  Culvert Observations:
  1. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:OrganicOrganic
Stream Slope(deg.):1.07
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 50.0 5.30
Downstream ordinary high water 110.0 4.70
Downstream ordinary high water 135.0 5.60
Upstream ordinary high water 75.0 6.50
Upstream ordinary high water 95.0 6.70
Upstream ordinary high water 120.0 5.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg 0.00 90.97
D/S Water Surface Elev 0.00 91.96
D/S Grade Ctrl (Thalweg) 12.00 90.72
D/S Water Surface Elev 12.00 91.66
Max Pool Depth 65.00 89.32
D/S Water Surface Elev 65.00 91.92
D/S Water Surface Elev 90.00 92.04
Outlet Invert (on substrate) 90.00 91.24
Outlet Invert (on sustrate) 90.00 91.24
Outlet Culvert Top 90.00 96.95
Road Elev 130.00 104.68
Inlet Culvert Top 170.00 97.40
Inlet Culvert Invert (on substrate) 170.00 91.51
Inlet Culvert Invert (on substrate) 170.00 91.51
U/S Water Surface Elev 170.00 92.22
U/S Water Surface Elev 188.00 92.39
U/S Thalweg 188.00 91.91
U/S Water Surface Elev 218.00 92.70
U/S Thalweg 218.00 91.82
U/S Water Surface Elev 230.00 92.84
U/S Thalweg 230.00 92.20

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): 2.05
 
Gear Type: Minnow Trap (B) Trap Duration(h): 2.15

Fish Observations

No fish observations occurred during this survey.

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