Fish Passage Site 20401349

Coordinates (dec. deg.): 61.66123°, -149.19296°
Legal Description: S018N001E12
Region: South Central
Road Name: Crabb Circle

Datum: NAD83
Quad Name / ITM: Anchorage C-6
AWC Stream #: 247-50-10260-2019-3087
Stream Name: Spring Creek

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 MSB09-CRB01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools:
Construction Year: 2009


Site Observations:

  1. None of this type

Comments: Post-replacement Survey of MSCS1WA045; may be open-bottom; prob 10' wide w/o subs; u/s gradient=1.01%;

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 52.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 20.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Cobble
InletOutlet
Width(ft):9.8 9.8
Height(ft):5.4 5.6
Apron Length(ft):
Water Depth(ft): 0.48
Rustline Height(ft):
Substrate Depth(ft):4.6 4.2
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 4.2
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.13
Culvert Gradient: 1.10%
Max Slope:
Max Slope Length:
 

Comments: U/S stream gradient = 1.01%. Sinuous channel in pipe. Substrate depth is an estimation based off the belief that the pipe is circular.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:SandSand
Stream Slope(deg.):1.01
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 62.0 10.00
Upstream ordinary high water 100.0 7.00
Upstream ordinary high water 161.0 9.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 1 104.73
D/S Grade Ctrl (Thalweg) (ws @ gp) 1 0.00 53.0 96.51
D/S Water Surface Elev 1 0.00 53.0 97.15
D/S Water Surface Elev 1 43.00 10.0 97.31
D/S Grade Ctrl (Thalweg) (ws @ gp) 1 43.00 10.0 96.98
D/S Thalweg 1 47.00 5.0 96.71
Outlet Invert 1 53.00 0.0 96.93
Outlet Pool Water Elev 1 53.00 97.41
Inlet Culvert Invert 1 105.00 0.0 97.70
U/S Headwater 1 105.00 98.42
U/S Water Surface Elev (ws @ gp) 1 123.00 18.0 98.52
U/S Grade Ctrl (Thalweg) 1 123.00 18.0 98.09
U/S Grade Ctrl (Thalweg) 1 185.00 80.0 99.14
U/S Water Surface Elev (ws @ gp) 1 185.00 80.0 99.31
U/S Grade Ctrl (Thalweg) 1 219.00 114.0 99.41
U/S Water Surface Elev (ws @ gp) 1 219.00 114.0 99.80
U/S Water Surface Elev (ws @ pro) 1 252.00 147.0 99.82
U/S Thalweg 1 252.00 147.0 99.33

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.

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