Fish Passage Site 20501437

Coordinates (dec. deg.): 61.56901°, -149.75970°
Legal Description: S017N003W14
Region: South Central
Road Name: Kenlar Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #: 247-50-10330-2050-3050
Stream Name: Little Meadow 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 MSB23-MS053

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Beth Evers, Amy LaBarre

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red

Comments: Large amounts of spawned dead adult Sockeye/Coho upstream and downstream. Several Dollys and 1 live Sockeye observed. Main channel flows through culvert 1.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 90.58
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):9.1 8.8
Height(ft):5.75 6.3
Apron Length(ft):
Water Depth(ft):0.0 2.44
Rustline Height(ft):2.1
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.22
Culvert Gradient: 0.35%
Max Slope:
Max Slope Length:
 

Comments: Unable to get a substrate depth due to the water being too deep.Mitering length added to the length.
  Culvert Observations:
  1. Constriction ratio red
ID: 2 Structure Type: Pipe-arch (Structural steel plate) Fish Passage Rating: Gray
 
Length(ft): 90.32
Inlet Type: Mitered
Outlet Type: Mitered
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):8.95 8.1
Height(ft):6.03 6.2
Apron Length(ft):
Water Depth(ft): 2.32
Rustline Height(ft):2.15
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.2
Culvert Gradient: 0.27%
Max Slope:
Max Slope Length:
 

Comments: Unable to get a substrate depth due to the water being too deep.Mitering length added to the length.
  Culvert Observations:
  1. Constriction ratio red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleSand
Subdominant:SandGravel
Stream Slope(deg.):0.11
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 86.0 39.00
Downstream ordinary high water 110.0 35.00
Downstream ordinary high water 150.0 46.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.39
D/S Thalweg 0.00 87.99
D/S Water Surface Elev 0.00 90.17
D/S Water Surface Elev 2 100.00 90.18
Outlet Invert 1 100.00 87.84
Outlet Invert 2 100.00 87.86
D/S Water Surface Elev 1 100.00 90.28
Outlet Culvert Top 1 100.00 94.04
Outlet Culvert Top 2 100.00 94.06
Inlet Culvert Top 2 190.32 94.27
Inlet Culvert Invert 2 190.32 88.31
U/S Water Surface Elev 2 190.32 90.21
Inlet Culvert Invert 1 190.58 90.22
Inlet Culvert Top 1 190.58 94.31
U/S Water Surface Elev 296.32 90.49
U/S Thalweg 296.32 88.92

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

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

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