Fish Passage Site 20501152

Coordinates (dec. deg.): 61.59139°, -149.74056°
Legal Description: S017N003W01
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: AKRR Mp 169.96

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-ARR06

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Outfall height gray
  3. Mechanical damage or joints parting

Comments: Damaged by ATVs: upstream detached, water flowing subsurface then back into pipe; otherwise in good cond.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 100.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.5
Condition Rating(1-5): 2
Approach Angle: 45.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.1 5.1
Height(ft):5.1 5.1
Apron Length(ft):
Water Depth(ft): 0.09
Rustline Height(ft):0.7
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.33
Outfall Type: Free Fall In To Pool
Constriction Ratio: 1.38
Culvert Gradient: 2.54%
Max Slope: 2.54
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Outfall height gray
  3. Mechanical damage or joints parting

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClayGravel
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 24.0 3.20
Upstream ordinary high water 69.0 4.00
Upstream ordinary high water 83.0 3.70

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev (WS in pipe at INVOUT) 1 92.48
D/S Tailcrest or 1st Thalweg 1 0.00 9.0 92.00
D/S Water Surface Elev (@TWC) 1 0.00 9.0 92.11
Outlet Pool Water Elev 1 7.00 2.0 92.15
D/S Thalweg (bottom of out pool) 1 7.00 2.0 91.61
Outlet Invert 1 9.00 0.0 92.39
Road Elev ((railroad)) 1 60.50 114.63
Inlet Culvert Invert (~no running water @inlet) 1 109.00 0.0 94.93
U/S Grade Ctrl (Thalweg) (TC of pool u/s) 1 119.50 10.5 94.36
U/S Water Surface Elev 1 119.50 10.5 94.90

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: Minnow Trap (A)
Comments: no fish caught; 100ft u/s; no set length recorded
 
Gear Type: Minnow Trap (B)
Comments: no fish caught; 75ft d/s; no set length recorded

Fish Observations

No fish observations occurred during this survey.

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