Fish Passage Site 20501119

Coordinates (dec. deg.): 61.56306°, -149.85611°
Legal Description: S017N003W17
Region: South Central
Road Name: Lakes Boulevard

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Unnamed

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-MS094

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Culvert sagging in middle

Comments: Inlet is fed by a ditch and a backwatered marsh. Road is sagging over culvert.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 43.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Organic
InletOutlet
Width(ft):3.0 2.9
Height(ft):1.7 2.0
Apron Length(ft):
Water Depth(ft):0.0 1.01
Rustline Height(ft):
Substrate Depth(ft):0.3 0.2
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.83
Culvert Gradient: -0.16%
Max Slope:
Max Slope Length:
 

Comments: Length taken by mapper (used 2004 survey length). Entire culvert is rusted. Inlet is smashed down, fed by a ditch and backwatered marsh. Down stream has a stream channel. Upstream is ditched.
  Culvert Observations:
  1. Culvert gradient red
  2. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):1.02
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 52.0 4.30
Downstream ordinary high water 71.0 2.70
Downstream ordinary high water 88.0 3.80

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.99
U/S Water Surface Elev 0.00 97.97
U/S Thalweg 0.00 97.41
Inlet Culvert Top 40.00 97.74
Inlet Culvert Invert 40.00 95.81
U/S Water Surface Elev 40.00 96.71
D/S Water Surface Elev 83.00 96.69
Outlet Invert 83.00 95.68
Outlet Culvert Top 83.00 97.81
D/S Water Surface Elev 136.00 96.36
D/S Thalweg 136.00 95.54
D/S Thalweg 176.00 95.27
D/S Water Surface Elev 176.00 96.17

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

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