Fish Passage Site 20504056

Coordinates (dec. deg.): 61.45562°, -149.75601°
Legal Description: S016N003W23
Region: South Central
Road Name: S Tuttle Rd

Datum: WGS84
Quad Name / ITM: Anchorage B-8
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Sep 14, 2023

Survey MSB23-MS034

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: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red

Comments: Condition difficult to determine due to nature of bog. Pipe too small for culvert thus filled to/over culvert. The culvert rusted. Lake on one side, bog on the other.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 34.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Organic
InletOutlet
Width(ft):1.0 1.0
Height(ft):1.4 1.3
Apron Length(ft):
Water Depth(ft):0.0 0.98
Rustline Height(ft):1.4
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 1.26%
Max Slope:
Max Slope Length:
 

Comments: Culvert 100% rusted
  Culvert Observations:
  1. Culvert gradient gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.14
U/S Thalweg 0.00 97.44
Inlet Culvert Invert 15.00 97.56
U/S Water Surface Elev 15.00 98.05
U/S Water Surface Elev 15.00 98.09
Inlet Culvert Top 15.00 98.61
Outlet Culvert Top 49.00 98.18
Outlet Invert 49.00 97.09
D/S Water Surface Elev 49.00 98.07
D/S Water Surface Elev 74.00 98.07
D/S Thalweg 74.00 96.05

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