Fish Passage Improvement site 20503423

Fish Passage Site 20503423

Coordinates (dec. deg.): 61.66370°, -149.94939°
Legal Description: S018N004W11
Region: South Central
Road Name: Alaska Railroad

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

Elevation:

Site Comments: MP 179.1

Survey Date: May 11, 2015

Survey UPDATE-AKR01

site photos

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman, Gillian O'Doherty

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Comments: Upstream width about 3 feet. There is a perched culvert about 300 feet upstream from site not in mapper. Nice gravels upstream. Water fairly flat though culvert, does not appear to be a barrier.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 46.8

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.75

Condition Rating(1-5): 3

Approach Angle: 23.0

Sedimentation At Inlet: No

Inlet Substrate: None

Outlet Substrate: Sand

	Inlet	Outlet
Width(ft):	4.1	4.0
Height(ft):	3.7	3.5
Apron Length(ft):
Water Depth(ft):		0.8
Rustline Height(ft):	1.6
Substrate Depth(ft):	0.0	0.3

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio:

Culvert Gradient: 0.15%

Max Slope:

Max Slope Length:

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Gravel	Sand
Subdominant:	Cobble	Gravel

Stream Slope(deg.):
Stream Flow Stage:	Medium

No stream width data available.

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
Outlet Culvert Top		0.00		95.00
Inlet Culvert Top		46.80		95.07

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.