Fish Passage Improvement site 10302225

Fish Passage Site 10302225

Coordinates (dec. deg.): 58.50771°, -134.77840°
Legal Description: C039S064E12
Region: Southeast
Road Name: Glacier Highway

Datum: NAD83
Quad Name / ITM: Juneau C-3
AWC Stream #:
Stream Name: Strawberry Creek

Elevation:

Site Comments: None

Survey Date: Jul 25, 2011

Survey SEA11-GLH19

site photos

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: Jason Olds, Charmagne Gutierrez

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:

Site Observations:

None of this type

Comments: New Pipe. Water, tannen rich. Nearly flatwatered, no grade points to speak of. May be backwatered from beavers or other cause further downstream at some point. No grade points 300 feet downstream from culvert. No fish observed. Water surface through pipe is flat, site is backwatered.

Culvert Measurements

ID: 1

Structure Type: Open-bottom arch (Structural steel plate)

Fish Passage Rating: Green

Length(ft): 134.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 5

Approach Angle: 11.0

Sedimentation At Inlet: No

Inlet Substrate: Cobble

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	12.0	12.0
Height(ft):	5.7	6.0
Apron Length(ft):
Water Depth(ft):		2.98
Rustline Height(ft):	4.3
Substrate Depth(ft):

Backwatered?: Yes

Baffles Present: No

Embedded?: Yes

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.29

Culvert Gradient: 0.57%

Max Slope:

Max Slope Length:

Comments: Tail water surface and headwater surface equal, site is backwatered.

Culvert Observations:

None of this type

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Organic	Organic
Subdominant:	Clay (legacy)	Clay (legacy)

Stream Slope(deg.):	0
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	130.0	9.20
Upstream ordinary high water	180.0	10.30
Upstream ordinary high water	230.0	8.50

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		105.01
Misc. (End of cobble, continuous flatwater, survey point D/S)	0.00	95.34
D/S Water Surface Elev	0.00	97.42
Outlet Culvert Top (Invert out, on metal)	11.00	100.04
Outlet Invert (Invert out, on substrate)	11.00	94.03
D/S Water Surface Elev (Invert out)	11.00	97.01
U/S Headwater (Invert in, first resting)	145.00	97.01
Inlet Culvert Invert (Invert in, on substrate)	145.00	94.79
Inlet Culvert Top (Invert in, on metal)	145.00	100.64
U/S Water Surface Elev (Stream gradient start)	158.00	97.02
U/S Water Surface Elev (Stream gradient end)	380.00	97.03

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.