Fish Passage Site 10302199

Coordinates (dec. deg.): 58.37079°, -134.61806°
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: Pipe turns somewhere throughout and gradually in it's 300 feet of length. Crosses under DMV parking lot. 1 drain pipe entering approximately 100 feet downstream from invert in. Christmas tree half burried in substrate somewhere in middle of pipe. SHD01 about 15 feet upstream from culvert.

Survey Date: Jun 19, 2011

Survey SEA11-DMV01

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:

  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Sediment accumulation

Comments: Pipe turns somewhere throughout and gradually in it's 300 feet of length. Crosses under DMV parking lot. 1 drain pipe entering approximately 100 feet downstream from invert in. Christmas tree half burried in substrate somewhere in middle of pipe. Very slow moving or potentially backwatered from a tailwater control somewhere further downstream than we could survey. Another culvert approximately 15 feet upstream of invert in. Downstream width used because of urbanized upstream area, however muskeg begins approximately 85 feet upstream through other side of culvert. Top of pipe used to estimate gradient. Water surface grade of .04% over length of pipe. Juvenile salmonids observed upstream and downstream of pipe. Heavy iron and organic sedimentation, muck accumulation through pipe.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 300.7
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Organic
Outlet Substrate: Organic
InletOutlet
Width(ft):5.0 5.0
Height(ft):3.4 3.35
Apron Length(ft):
Water Depth(ft): 1.77
Rustline Height(ft):1.6
Substrate Depth(ft):1.6 1.65
Backwatered?: Yes
Baffles Present:
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.58
Culvert Gradient: 0.87%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient gray
  2. Constriction ratio gray
  3. Sediment accumulation

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayOrganic
Subdominant:OrganicSilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 60.0 7.80
Downstream ordinary high water 85.0 11.20
Downstream ordinary high water 112.0 7.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 99.22
D/S Grade Ctrl (Thalweg) 0.00 89.42
D/S Water Surface Elev 0.00 90.06
D/S Water Surface Elev (Invert out) 12.00 90.05
Outlet Thalweg 12.00 88.28
Outlet Culvert Top 12.00 91.94
Inlet Culvert Top 312.70 94.56
Inlet Culvert Invert (On metal) 312.70 89.40
U/S Water Surface Elev (Invert in) 312.70 90.16
U/S Water Surface Elev 317.70 90.15
U/S Grade Ctrl (Thalweg) 317.70 89.48

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. 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 upstream of culvert

Fish Observations

No fish observations occurred during this survey.

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