Fish Passage Site 20501876

Coordinates (dec. deg.): 61.65833°, -149.49677°
Legal Description: S018N001W08
Region: South Central
Road Name: Driveway off Sitze Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Moon Princess Creek

Elevation:

Site Comments: Culvert was put in in 2008 and no prior survey data could be found so site was re-surveyed. Stream AKA Colter Creek

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 MSB11-STPD01

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: 2008


Site Observations:

  1. Constriction ratio gray

Comments: Survey is a re-survey of culvert located on a private drive at the end of Sitze Road. Upst and dwst are continuous riffles for several hundred feet. Culvert appeared to be an open bottom arch so TOP elevations were used for pipe gradient. Site is just below the threshold limit on the constriction ratio to be rated green Velocity through the pipe was no different than instream velocities upst and dwst site rated green.

Culvert Measurements

ID: 1 Structure Type: Open-bottom arch (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 25.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 5
Approach Angle: 4.0
Sedimentation At Inlet: Yes
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):10.0 9.9
Height(ft):4.1 4.1
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.7
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: 0.72
Culvert Gradient: 1.10%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio gray

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:CobbleCobble
Stream Slope(deg.):2.1
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 115.0 15.00
Downstream ordinary high water 173.0 14.70
Downstream ordinary high water 218.0 11.70

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Water Surface Elev (water surface elev used for gradient) 0.00 91.53
D/S Water Surface Elev 137.00 94.07
D/S Water Surface Elev (water surface elev used for gradient) 172.00 95.13
D/S Thalweg (profile pt in continuous riffle) 184.00 95.47
D/S Water Surface Elev 184.00 95.95
Outlet Culvert Top 213.00 100.00
Outlet Invert (Outlet invert on substrate) 213.00 95.69
D/S Water Surface Elev (Outlet water surface elev) 213.00 96.39
Road Elev 228.00 101.64
Inlet Culvert Top 238.90 100.29
Inlet Culvert Invert (Inlet invert on substrate) 238.90 96.32
U/S Water Surface Elev (Inlet water surface elev) 238.90 96.66
U/S Thalweg (profile pt in continuous riffle) 276.90 97.58
U/S Water Surface Elev 276.90 98.02

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