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 MSB23-MS095

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient red
  3. Culvert sagging in middle

Comments: Fed by road side ditch. Road sagging where culvert goes under.

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 45.0
Inlet Type: Mitered
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 90.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Sand
InletOutlet
Width(ft):2.6 2.6
Height(ft):2.1 1.7
Apron Length(ft):2.0
Water Depth(ft):0.0 0.54
Rustline Height(ft):1.1
Substrate Depth(ft):0.0 0.3
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.23
Culvert Gradient: 2.30%
Max Slope:
Max Slope Length:
 

Comments: Outlet bent, mitering may be torn off. Inlet mitering bent on top. Culvert length used from 2004 survey.
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert gradient red
  3. Culvert sagging in middle

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:SandSand
Stream Slope(deg.):0.58
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 40.0 7.90
Downstream ordinary high water 58.0 13.40
Downstream ordinary high water 82.0 12.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.98
D/S Water Surface Elev 0.00 95.07
D/S Thalweg 0.00 93.87
Outlet Invert 95.00 94.63
D/S Water Surface Elev 95.00 95.17
Outlet Culvert Top 95.00 96.35
Inlet Culvert Top 140.00 97.40
Inlet Culvert Invert 140.00 95.25
U/S Water Surface Elev 140.00 95.42
U/S Thalweg 143.00 95.67
U/S Water Surface Elev 143.00 96.00
U/S Thalweg 242.00 95.65
U/S Water Surface Elev 242.00 96.48

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