Fish Passage Site 20400242

Coordinates (dec. deg.): 61.08332°, -149.82636°
Legal Description: S012N003W33
Region: South Central
Road Name: Rabbit Creek Road

Datum: NAD83
Quad Name / ITM: Anchorage A-8
AWC Stream #: 247-60-10320
Stream Name: Rabbit Creek

Elevation:

Site Comments: RABBIT CREEK WATERSHED. Step pools installed downstream in 1989 by DOT. Designed to pass adult chinook and coho salmon and withstand high flows. Banks revegetation carried out at the same tim. During 2010 site visit damage and debris accumulation observed through gabion strucutres.

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 ANC04-3A158

Observers: Dean Beers, Vic Stanculescu

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year: 1989


Comments: None

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 214.9
Inlet Type: Mitered
Outlet Type:
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):9.5
Height(ft):9.5
Apron Length(ft):
Water Depth(ft): 0.2
Rustline Height(ft):1.3
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.06
Outfall Type:
Constriction Ratio: 0.85
Culvert Gradient: 1.95%
Max Slope:
Max Slope Length:
 

Comments: Step pools constructed in 1989, culvert is older.
ID: 2 Structure Type: Circular pipe (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 214.5
Inlet Type: Mitered
Outlet Type:
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 3
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):9.5
Height(ft):9.5
Apron Length(ft):
Water Depth(ft): 0.8
Rustline Height(ft):2.2
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: 0.06
Outfall Type:
Constriction Ratio: 0.85
Culvert Gradient: 1.82%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream bank full 75.0 36.30
Upstream bank full 100.0 38.90
Upstream bank full 125.0 39.70
Upstream bank full 150.0 40.00
Upstream bed width 75.0 19.00
Upstream bed width 100.0 20.10
Upstream bed width 125.0 15.20
Upstream bed width 150.0 17.60
Upstream ordinary high water 75.0 19.50
Upstream ordinary high water 100.0 24.30
Upstream ordinary high water 125.0 22.90
Upstream ordinary high water 150.0 23.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Tailcrest or 1st Thalweg 59.93
Max Pool Depth 60.85
D/S Thalweg 60.85
OHW Left Bank 61.99
OHW Left Bank 62.00
U/S Thalweg 1 66.34
U/S Thalweg 2 66.34
Outlet Invert 2 0.00 0.0 61.25
Outlet Invert 1 0.00 0.0 61.47
Inlet Culvert Invert 2 214.00 0.0 65.15
Inlet Culvert Invert 1 214.00 0.0 65.66

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)

Fish Observations

No fish observations occurred during this survey.

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