Fish Passage Improvement site 20501035

Fish Passage Site 20501035

Coordinates (dec. deg.): 61.69125°, -149.27878°
Legal Description: S019N001E33
Region: South Central
Road Name: Edgerton Parks Road

Datum: NAD83
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name:

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 MSB11-EGP02

site photos

Project Supervisor: Gillian O'Doherty, Alaska Department of Fish and Game — Anchorage, AK
Observers: John Greuey, Abraham Gioffre

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: Maybe
Construction Year: 2010

Site Observations:

None of this type

Comments: Resurvey of MSB04ML009. Post-replacement survey. Substrate at outlet was greater than 3.2'

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural aluminum plate)

Fish Passage Rating: Green

Length(ft): 80.3

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 5

Approach Angle: 18.0

Sedimentation At Inlet: No

Inlet Substrate: Cobble

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	13.8	13.7
Height(ft):	7.25	7.6
Apron Length(ft):	0.0	0.0
Water Depth(ft):		0.51
Rustline Height(ft):	0.0
Substrate Depth(ft):	2.5	3.2

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 2.5

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.52

Culvert Gradient: 1.41%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

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

Stream Slope(deg.):	2.03
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	89.0	9.60
Downstream ordinary high water	114.0	9.80
Downstream ordinary high water	144.0	7.90

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Grade Ctrl (Thalweg) (Top of riffle)	0.00	83.13
D/S Water Surface Elev (Used for stream gradient)	0.00	83.76
D/S Grade Ctrl (Thalweg)	84.00	85.04
D/S Water Surface Elev	84.00	85.59
D/S Grade Ctrl (Thalweg)	126.00	85.73
D/S Water Surface Elev (Used for stream gradient)	126.00	86.33
Outlet Invert	202.00	86.85
D/S Water Surface Elev (Water surface at outlet)	202.00	87.36
Outlet Culvert Top	202.00	94.98
Road Elev	232.00	100.12
Inlet Culvert Top	282.30	96.11
Inlet Culvert Invert	282.30	88.61
U/S Water Surface Elev (Water surface at inlet)	282.30	88.97
U/S Grade Ctrl (Thalweg) (Top of riffle)	337.30	89.93
U/S Water Surface Elev	337.30	90.13

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.