Fish Passage Improvement site 20501034

Fish Passage Site 20501034

Coordinates (dec. deg.): 61.69004°, -149.29552°
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-EGP03

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: Yes
Construction Year: 2010

Site Observations:

None of this type

Comments: Replacement survey of MSB04ML008. Pipe appeared circular although could not hit bottom after driving a stake 3.5' into substrate. Pipe is embedded or open bottom arch.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 64.88

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 3.0

Condition Rating(1-5): 4

Approach Angle: 38.0

Sedimentation At Inlet: No

Inlet Substrate: Cobble

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	9.7	9.95
Height(ft):	6.15	6.35
Apron Length(ft):	0.0	0.0
Water Depth(ft):		0.28
Rustline Height(ft):	0.0
Substrate Depth(ft):	3.5	3.5

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 3.5

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.72

Culvert Gradient: 2.76%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

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

Stream Slope(deg.):	2.5
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	62.0	5.80
Downstream ordinary high water	97.0	5.60
Downstream ordinary high water	107.0	5.55

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Grade Ctrl (Thalweg) (Top of riffle)	0.00	84.25
D/S Water Surface Elev (Used for stream gradient)	0.00	84.69
D/S Grade Ctrl (Thalweg)	48.00	85.37
D/S Water Surface Elev	48.00	85.74
D/S Grade Ctrl (Thalweg)	88.00	86.67
D/S Water Surface Elev (Used for stream gradient)	88.00	86.91
Outlet Invert	120.00	87.38
D/S Water Surface Elev (Water surface at outlet)	120.00	87.66
Outlet Culvert Top	120.00	93.82
Road Elev	145.00	98.95
Inlet Culvert Top	184.88	95.61
U/S Water Surface Elev (Water surface at inlet)	184.88	89.71
Inlet Culvert Invert	184.88	89.42
U/S Grade Ctrl (Thalweg) (Grade point of braid #2)	201.88	89.71
U/S Water Surface Elev (Water surface of braid #2)	201.88	90.12
U/S Water Surface Elev (Water surface of braid #1)	209.88	89.85
U/S Grade Ctrl (Thalweg) (Grade point of braid #1)	209.88	89.56

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.