Fish Passage Site 20502126

Coordinates (dec. deg.): 61.68623°, -149.97345°
Legal Description: S019N004W34
Region: South Central
Road Name: Nancy Lake Circle

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Nancy Creek

Elevation:

Site Comments: None

Survey Date: Jun 06, 2011

Survey MSB11-NLK01

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: John Greuey, Abraham Gioffre

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2010


Site Observations:

  1. None of this type

Comments: Appears to be a new culvert. Juvenile fish observed.

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural aluminum plate) Fish Passage Rating: Green
 
Length(ft): 41.18
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 9.0
Condition Rating(1-5): 5
Approach Angle: 22.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):18.0 17.8
Height(ft):5.88 6.1
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.59
Rustline Height(ft):0.0
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.46
Culvert Gradient: 1.67%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):2
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 75.0 10.10
Downstream ordinary high water 131.0 13.75
Downstream ordinary high water 242.0 13.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.57
D/S Grade Ctrl (Thalweg) 0.00 89.25
D/S Water Surface Elev (Used for stream gradient) 0.00 89.55
D/S Grade Ctrl (Thalweg) 86.00 90.65
D/S Water Surface Elev 86.00 91.24
D/S Grade Ctrl (Thalweg) 130.00 91.33
D/S Water Surface Elev (Used for stream gradient) 130.00 92.21
D/S Water Surface Elev (Water surface at outlet) 186.00 92.79
Outlet Invert 186.00 92.20
Outlet Culvert Top 186.00 98.48
Inlet Culvert Top 227.18 99.04
Inlet Culvert Invert 227.18 92.82
U/S Water Surface Elev (Water surface at inlet) 227.18 93.48
U/S Grade Ctrl (Thalweg) (Top of riffle) 272.18 94.06
U/S Water Surface Elev 272.18 94.74

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

Gear Type: Visual Observation, Ground (A)
Comments: Juvenile fish observered.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov