Fish Passage Site 20504061

Coordinates (dec. deg.): 61.67663°, -150.09030°
Legal Description: S018N005W01
Region: South Central
Road Name: Nancy Lake Road

Datum:
Quad Name / ITM: Tyonek C-1
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: Sep 26, 2023

Survey MSB23-MS066

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 gray

Comments: Inlet is fed by pond. Inlet and outlet has large amounts of overgrown vegetation at the mouth of the culvert.Outlet flow is very high, not much of the culvert is showing.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 95.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 4
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Organic
Outlet Substrate: Organic
InletOutlet
Width(ft):2.0 1.7
Height(ft):1.9 1.0
Apron Length(ft):
Water Depth(ft):0.0 0.39
Rustline Height(ft):1.6
Substrate Depth(ft):0.0 1.5
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 1.08%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray

Stream Measurements

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

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.27
D/S Water Surface Elev 0.00 89.77
Outlet Invert 40.00 90.65
D/S Water Surface Elev 40.00 91.04
Outlet Culvert Top 40.00 91.54
Inlet Culvert Top 135.00 92.60
U/S Water Surface Elev 135.00 91.53
Inlet Culvert Invert 135.00 90.80
U/S Water Surface Elev 175.00 91.66

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