Fish Passage Site 20501120

Coordinates (dec. deg.): 61.56300°, -149.84833°
Legal Description: S017N003W17
Region: South Central
Road Name: Lake 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 MSB04-ML094

Observers: Gary Greenberg, Jen Ransom

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Update site photos added from 9/14/16 site visit from Sampling Unmapped streams in the MSB. No fish observed.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated Metal) Fish Passage Rating: Red
 
Length(ft): 45.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5):
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):3.0
Height(ft):2.0
Apron Length(ft):
Water Depth(ft):0.2 0.25
Rustline Height(ft):0.05
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 1.80%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream bed width 75.0 3.50
Upstream bed width 100.0 4.10
Upstream bed width 125.0 3.30
Upstream bed width 150.0 3.80
Upstream ordinary high water 75.0 3.80
Upstream ordinary high water 100.0 5.00
Upstream ordinary high water 125.0 4.00
Upstream ordinary high water 150.0 4.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
OHW Left Bank 97.24
OHW Left Bank 97.39
D/S Tailcrest or 1st Thalweg 0.00 1.8 97.08
Max Pool Depth 0.50 1.3 97.00
D/S Thalweg 0.50 1.3 97.00
Outlet Invert 1 1.80 0.0 97.12
Road Elev 24.30 102.84
Inlet Culvert Invert 1 46.80 0.0 97.93
U/S Thalweg 1 52.80 6.0 97.53
U/S Water Surface Elev 1 53.80 7.0 97.93

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