Fish Passage Site 20501258

Coordinates (dec. deg.): 61.65263°, -149.82623°
Legal Description: S018N003W16
Region: South Central
Road Name: Zero Lakes Road

Datum: WGS84
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Lake Creek tributary

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-MS064

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio gray
  2. Culvert gradient red

Comments: Overgrown on outlet side, stream is underneath vegetation. Inlet does not have specific channel, more of a pond/marsh.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 31.9
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Sand
Outlet Substrate: Organic
InletOutlet
Width(ft):1.7 1.2
Height(ft):1.7 1.7
Apron Length(ft):0.0 2.6
Water Depth(ft):0.0 0.92
Rustline Height(ft):0.8
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.71
Culvert Gradient: 2.60%
Max Slope:
Max Slope Length:
 

Comments: Inlet opening is damaged and torn apart. Inlet has drop in. Outlet apron is intact. Took pipe length from mapper due to poor visibilty. (11/20/2023 KL)

  Culvert Observations:
  1. Constriction ratio gray
  2. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):2.13
Stream Flow Stage:High
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Upstream bed width 50.0 3.00
Upstream bed width 75.0 2.00
Upstream bed width 100.0 2.10

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
Road Elev 100.08
D/S Thalweg 0.00 94.51
D/S Water Surface Elev 0.00 95.34
D/S Water Surface Elev 55.00 95.76
D/S Thalweg 55.00 94.27
Outlet Culvert Top 70.00 98.09
Outlet Invert 70.00 96.57
D/S Water Surface Elev 70.00 97.49
Inlet Culvert Invert 101.90 97.51
U/S Water Surface Elev 101.90 97.84
Inlet Culvert Top 101.90 98.92
U/S Water Surface Elev 102.90 98.04
U/S Thalweg 102.90 97.08
U/S Water Surface Elev 131.90 98.15

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