Fish Passage Improvement site 30303083

Fish Passage Site 30303083

Coordinates (dec. deg.): 59.03064°, -158.53572°
Legal Description: S013S056W24
Region: Southwest
Road Name: Kanakanak Road

Datum: NAD83
Quad Name / ITM: Dillingham A-7
AWC Stream #: 325-30-10100-2019
Stream Name: Unnamed

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 SWA12-DIL21

site photos

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Gillian O'Doherty, Mark Eisenman

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:

Site Observations:

Beaver Activity
Hydraulic flows exceeded capacity

Comments: Backwatered so green. Pipe is submerged. Pipe is 5 or 6 feet in diameter and approximately 6 inches underwater, so all measurements are approximate. Beaver dam downstream is backwatering the pipe and several upstream channels. Outlet full to top. Downstream channel approximately 7 feet wide and 5 feet deep, but water is high.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft):

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5): 1

Approach Angle: 0.0

Sedimentation At Inlet: Unknown

Inlet Substrate:

Outlet Substrate:

	Inlet	Outlet
Width(ft):	6.0	6.0
Height(ft):	5.5	5.5
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):

Backwatered?: Yes

Baffles Present: No

Embedded?: No

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio:

Culvert Gradient:

Max Slope:

Max Slope Length:

Comments: Measurements approximate as pipe submerged at outlet and nearly submerged at inlet.

Culvert Observations:

Beaver Activity
Hydraulic flows exceeded capacity

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Silt/Clay	Silt/Clay
Subdominant:	Organic	Organic

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

No stream width data available.

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
D/S Water Surface Elev (at outlet)				92.98
U/S Water Surface Elev (at inlet)				92.99

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.