Fish Passage Site 20401295

Coordinates (dec. deg.): 61.52490°, -149.57124°
Legal Description: S017N002W35
Region: South Central
Road Name: Cardiff Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Lucy Creek tributary

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-CAR01

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2004


Site Observations:

  1. Culvert gradient gray
  2. Culvert is poorly aligned
  3. Compound gradient in pipe

Comments: Post-replacement survey MSCS1CT146; pipe embedded, but substrate is scouring away at outlet. ~10cm DV observed u/s of culvert.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 52.4
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 5
Approach Angle: 48.0
Sedimentation At Inlet: No
Inlet Substrate:
Outlet Substrate: Gravel
InletOutlet
Width(ft):4.6 4.7
Height(ft):3.3 3.8
Apron Length(ft):
Water Depth(ft): 0.11
Rustline Height(ft):0.8
Substrate Depth(ft):1.3 0.7
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 0.7
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.99
Culvert Gradient: 2.23%
Max Slope:
Max Slope Length:
 

Comments: U/s stream grade is 1.02%;
  Culvert Observations:
  1. Culvert gradient gray
  2. Culvert is poorly aligned
  3. Compound gradient in pipe

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:SandGravel
Subdominant:GravelGravel
Stream Slope(deg.):1.02
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 80.0 6.00
Upstream ordinary high water 140.0 4.00
Upstream ordinary high water 185.0 4.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Headwater 1 97.07
Outlet Pool Water Elev (WS@invout) 1 95.15
D/S Grade Ctrl (Thalweg) (used 25' rod) 1 0.00 90.0 89.00
D/S Water Surface Elev (@GP - used 25' rod) 1 0.00 90.0 89.50
D/S Grade Ctrl (Thalweg) 1 56.00 34.0 92.15
D/S Water Surface Elev (@GP) 1 56.00 34.0 92.69
D/S Thalweg 1 85.00 5.0 94.43
Outlet Invert 1 90.00 0.0 95.04
Outlet Culvert Top (Top of pipe at outlet) 1 90.00 0.0 98.84
Road Elev 1 116.00 101.83
Inlet Culvert Top (Top of pipe at inlet) 1 142.40 0.0 100.01
Inlet Culvert Invert 1 142.40 0.0 96.76
U/S Grade Ctrl (Thalweg) 1 146.40 4.0 97.13
U/S Water Surface Elev (@GP) 1 146.40 4.0 97.58
U/S Grade Ctrl (Thalweg) (top of riffle leading into pipe - stream flat above this point) 1 170.40 28.0 97.93
U/S Water Surface Elev (@GP) 1 170.40 28.0 98.46
U/S Water Surface Elev (u/s WS - stream flat and muddy, no GP) 1 277.40 135.0 98.92

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: Dolly varden juvenile seen upstream.

Fish Observations

No fish observations occurred during this survey.

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