Fish Passage Site 20501434

Coordinates (dec. deg.): 61.56113°, -149.77858°
Legal Description: S017N003W14
Region: South Central
Road Name: Big Lake Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #: 247-50-10330-2050-3030
Stream Name: Lucille Creek

Elevation:

Site Comments: SUSITNA RIVER WATERSHED

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 MSB11-BLR01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: John Greuey, Abraham Gioffre

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Outfall height red

Comments: Site on Lucille Creek on W. Big Lake Rd with multiple baffles in the pipe and one near the outlet creating a 1' outfall with strong flow. Dwst of culvert is a USFWS fish counter. Several spawning sockeye were observed in the step pools in the pipe as well as the gravel ATV roadway through the creek upst. It's been noted by Sue Mauger from Cook Inletkeep that there are cold groudwater seeps upstream around the ATV trail crossing that need to be addressed when planning for replacing or upgrading this site. See attached photo submitted Dec 8, 2016.

Culvert Measurements

ID: 1 Structure Type: Oval (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 108.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 34.0
Sedimentation At Inlet: Yes
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):7.0 6.9
Height(ft):3.0 4.75
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.99
Rustline Height(ft):1.0
Substrate Depth(ft):1.7 0.0
Backwatered?: No
Baffles Present: Yes
Embedded?: No
Outfall Height:
Outfall Type: Fish Passage Structue
Constriction Ratio: 0.8
Culvert Gradient: 1.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):1.6
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 72.0 10.00
Upstream ordinary high water 189.0 7.00
Upstream ordinary high water 250.0 9.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Water Surface Elev (water surface used for stream gradient) 0.00 101.35
U/S Water Surface Elev 17.00 101.30
U/S Water Surface Elev (water surface used for stream gradient) 104.00 99.73
U/S Water Surface Elev 109.00 99.71
U/S Thalweg (upst profile point in center of gravel ATV crossing) 109.00 99.12
U/S Grade Ctrl (Thalweg) (Top of riffle) 128.00 99.28
U/S Water Surface Elev 128.00 99.71
Inlet Culvert Top 163.00 101.49
Inlet Culvert Invert (Inlet invert on substrate) 163.00 98.47
U/S Water Surface Elev (water surface at inlet) 163.00 98.87
Road Elev 213.00 103.91
Outlet Culvert Top 271.40 100.10
Outlet Invert (Outlet invert on substrate just below baffle in pipe) 271.40 95.26
D/S Water Surface Elev (Outlet water surface which was very turbulent due to baffle in pipe) 271.40 96.25
D/S Water Surface Elev (tailwater control water surface.) 284.40 96.28
D/S Tailcrest or 1st Thalweg (cobble riffle) 284.40 95.82

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: Visual Observation, Ground (A)
Comments: Several spawning sockeye observed upstream.

Fish Observations

Species: adult spawning sockeye salmon Life History: Anadromous (Suspected Spawning)
Total Fish Observed: 20 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Visual Observation, Ground (20)  

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