Fish Passage Site 20501444

Coordinates (dec. deg.): 61.59164°, -149.66653°
Legal Description: S017N002W05
Region: South Central
Road Name: Meadow Lakes Loop Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #: 247-50-10330-2050-3050-4027
Stream Name: Unnamed

Elevation:

Site Comments: Little Meadow Creek Tributary. NEW CULVERT in 2004

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 MSB09-MLL01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Gillian O'Doherty, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2004


Site Observations:

  1. None of this type

Comments: Post-replacement survey of MSB04ML032; Many coho carcasses in culvert, u/s, and d/s; U/S slope is 0.16%.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 70.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 5.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):12.0 12.0
Height(ft):5.5 5.2
Apron Length(ft):
Water Depth(ft): 0.42
Rustline Height(ft):1.2
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.22
Culvert Gradient: 0.37%
Max Slope:
Max Slope Length:
 

Comments: U/S stream gradient is 0.160% flattens near pipe. Slope calc'd from top of pipe. Water surface slope through pipe is 0.39%
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:GravelGravel
Stream Slope(deg.):0.16
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 43.0 9.00
Upstream ordinary high water 65.0 11.00
Upstream ordinary high water 105.0 9.60

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Pool Water Elev 1 94.64
U/S Headwater 1 94.91
D/S Grade Ctrl (Thalweg) 1 0.00 16.0 94.39
D/S Water Surface Elev (@GP) 1 0.00 16.0 94.55
D/S Grade Ctrl (Thalweg) 1 4.00 12.0 94.33
D/S Water Surface Elev (@GP) 1 4.00 12.0 94.60
Outlet Invert 1 16.00 0.0 94.22
Outlet Culvert Top (Top of pipe @ outlet (use for slope)) 1 16.00 0.0 99.62
Road Elev 1 51.00 102.47
Inlet Culvert Top (Top of pipe @ inlet) 1 86.00 0.0 99.88
Inlet Culvert Invert 1 86.00 0.0 94.25
U/S Grade Ctrl (Thalweg) 1 114.00 28.0 94.55
D/S Water Surface Elev (@GP) 1 114.00 28.0 94.91
U/S Water Surface Elev (@Pro) 1 136.00 50.0 94.93
U/S Thalweg 1 136.00 50.0 94.40
U/S Water Surface Elev (u/s) 1 161.00 75.0 94.95
U/S Water Surface Elev (u/s) 1 186.00 100.0 94.95
U/S Water Surface Elev (u/s) 1 211.00 125.0 95.01
U/S Water Surface Elev (u/s) 1 228.00 142.0 95.08
U/S Water Surface Elev (u/s) 1 241.00 155.0 95.12
U/S Water Surface Elev (u/s) 1 276.00 190.0 95.17

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: 3-4 adult coho seen swimming through culvert. Many carcasses seen in culvert and upstream and downstream.

Fish Observations

Species: adult coho salmon Life History: Anadromous
Total Fish Observed: 4 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: At Site Visual Observation, Ground (4)  

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