Fish Passage Site 20501084

Coordinates (dec. deg.): 61.57824°, -149.73050°
Legal Description: S017N003W12
Region: South Central
Road Name: Brittany Drive

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Little Meadow Creek

Elevation:

Site Comments: None

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-MS060

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Outfall height red
  3. Structural Problem

Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 39.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.7
Condition Rating(1-5): 2
Approach Angle: 45.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):4.3 4.4
Height(ft):2.6 2.5
Apron Length(ft):
Water Depth(ft):0.0 0.8
Rustline Height(ft):1.1
Substrate Depth(ft):0.6 0.5
Backwatered?: No
Baffles Present: Yes
Embedded?: No
Embedded Depth(ft): 0.5
Outfall Height: 0.5
Outfall Type: Hydraulic Jump
Constriction Ratio: 0.6
Culvert Gradient: 0.42%
Max Slope:
Max Slope Length:
 

Comments: Bottom of culvert at outlet is bent up several inches and damaged. Under lower water conditions probabily free fall into pool. Pipe has baffles.
  Culvert Observations:
  1. Constriction ratio gray
  2. Outfall height red
  3. Structural Problem

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Gravel
Subdominant:Cobble
Stream Slope(deg.):1.56
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 6.5 100.00
Downstream ordinary high water 7.0 80.00
Downstream ordinary high water 8.0 50.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (MS060) 95.33
Road Elev (MS059) 104.91
D/S Thalweg 0.00 89.59
D/S Water Surface Elev 0.00 91.11
D/S Water Surface Elev 15.00 91.21
D/S Thalweg 15.00 90.55
D/S Thalweg 68.00 90.59
D/S Water Surface Elev 68.00 91.63
D/S Water Surface Elev 77.00 91.87
D/S Thalweg 77.00 91.12
D/S Thalweg 97.00 90.82
D/S Water Surface Elev 97.00 92.17
D/S Water Surface Elev (MS060) 100.00 92.36
D/S Water Surface Elev (MS060, Top of Baffle) 100.00 92.07
Outlet Invert (MS060) 101.00 91.61
Outlet Culvert Top (MS060) 101.00 94.47
Inlet Culvert Top (MS060) 139.00 96.49
Inlet Culvert Invert (MS060) 139.00 91.79
U/S Water Surface Elev (MS060) 139.00 92.52
D/S Water Surface Elev 146.00 92.80
D/S Thalweg 146.00 92.10
D/S Water Surface Elev (MS059) 194.00 93.25
Outlet Culvert Top (MS059) 194.00 97.79
Outlet Invert (MS059) 194.00 92.37
U/S Water Surface Elev 222.00 94.57
U/S Water Surface Elev (MS059) 406.00 94.48
Inlet Culvert Top (MS059) 406.00 99.05
Inlet Culvert Invert (MS059) 406.00 93.62

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