Fish Passage Improvement site 10302198

Fish Passage Site 10302198

Coordinates (dec. deg.): 58.37132°, -134.61694°
Legal Description: C040S065E25
Region: Southeast
Road Name: Sherwood Drive

Datum: NAD83
Quad Name / ITM: Juneau B-2
AWC Stream #:
Stream Name: Casa Del Sol tributary

Elevation:

Site Comments: Culvert is 15 feet upstream from DMV01.

Survey Date: Jun 19, 2011

Survey SEA11-SHD01

site photos

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

Overall Fish Passage Rating: Green

Tidal: Maybe
Backwatered: Yes

Step Pools: No
Construction Year:

Site Observations:

Sediment accumulation

Comments: 300 foot long culvert below DMV Juneau parking lot located approximately 15 feet downstream from invert out, likely sharing a common tailwater control much further downstream. Upstream is a muskeg complex. Juvenile salmonids observed swimming in pipe. Water surface through length of pipe nearly level.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 77.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 3.0

Condition Rating(1-5): 3

Approach Angle: 16.0

Sedimentation At Inlet: Yes

Inlet Substrate: Silt/Clay

Outlet Substrate: Organic

	Inlet	Outlet
Width(ft):	5.0	5.0
Height(ft):	4.9	4.8
Apron Length(ft):
Water Depth(ft):		0.96
Rustline Height(ft):	2.2
Substrate Depth(ft):	0.1	0.2

Backwatered?: Yes

Baffles Present: No

Embedded?: No

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.52

Culvert Gradient: 0.27%

Max Slope:

Max Slope Length:

Culvert Observations:

Sediment accumulation

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	7.0	2.70
Upstream ordinary high water	14.0	3.20
Upstream ordinary high water	23.0	4.00

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		100.44
D/S Grade Ctrl (Thalweg)	0.00	90.63
D/S Water Surface Elev	0.00	91.32
D/S Water Surface Elev (Invert out)	6.00	91.32
Inlet Thalweg	6.00	90.36
Outlet Culvert Top	6.00	95.34
Inlet Culvert Top	83.00	95.55
U/S Water Surface Elev (Invert in)	83.00	91.34
Outlet Thalweg	83.00	90.62
U/S Grade Ctrl (Thalweg)	88.00	90.46
U/S Water Surface Elev	88.00	91.33
U/S Grade Ctrl (Thalweg)	109.00	88.96
U/S Water Surface Elev	109.00	91.34

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)
Comments: Juvenile salmonids observed in pipe.

Fish Observations

No fish observations occurred during this survey.

Photos

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