Fish Passage Improvement site 20300202

Fish Passage Site 20300202

Coordinates (dec. deg.): 61.00009°, -149.64154°
Legal Description: S011N002W33
Region: South Central
Road Name: SEWARD HIGHWAY

Datum: NAD83
Quad Name / ITM: Anchorage A-8
AWC Stream #:
Stream Name: Rainbow Creek

Elevation:

Site Comments: RAINBOW CREEK WATERSHED

Survey Date: Oct 07, 2004

Survey ANC04-4A202

site photos

Observers: Dean Beers, Vic Stanculescu

Overall Fish Passage Rating: Red

Tidal: Yes
Backwatered: No

Step Pools:
Construction Year:

Comments: RAINBOW CREEK WATERSHED

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating:

Length(ft): 231.4

Inlet Type: Mitered

Outlet Type:

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 3.0

Condition Rating(1-5): 3

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate:

Outlet Substrate:

	Inlet	Outlet
Width(ft):	7.5
Height(ft):	7.5
Apron Length(ft):
Water Depth(ft):		2.7
Rustline Height(ft):	1.9
Substrate Depth(ft):

Backwatered?:

Baffles Present: No

Embedded?: No

Outfall Height:

Outfall Type:

Constriction Ratio: 0.72

Culvert Gradient: 4.27%

Max Slope:

Max Slope Length:

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:
Subdominant:

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream bank full	75.0	13.10
Upstream bank full	100.0	10.50
Upstream bank full	125.0	14.00
Upstream bank full	150.0	14.50
Upstream bed width	75.0	9.40
Upstream bed width	100.0	9.00
Upstream bed width	125.0	11.10
Upstream bed width	150.0	11.90
Upstream ordinary high water	75.0	9.40
Upstream ordinary high water	100.0	9.10
Upstream ordinary high water	125.0	11.10
Upstream ordinary high water	150.0	12.00

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
U/S Thalweg	1			94.11
Outlet Invert	1	0.00	0.0	83.18
Road Elev		115.50		133.32
Inlet Culvert Invert	1	231.00	0.0	93.05

Notes:

River distance is measured continuously throughout the survey reach along the thalweg of the stream.
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.

Photos

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