Fish Passage Improvement site 20501054

Fish Passage Site 20501054

Coordinates (dec. deg.): 61.61229°, -149.64629°
Legal Description: S018N002W33
Region: South Central
Road Name: North Meadow Lakes Road

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name:

Elevation:

Site Comments: Old site ID ML028

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-MED02

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: No
Construction Year: 2010

Site Observations:

None of this type

Comments: Updated site photos and fish capture information added from 9/1/16 site visit from the Sampling Unmapped Streams in the MSB project.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Green

Length(ft): 48.2

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.5

Condition Rating(1-5): 5

Approach Angle: 12.0

Sedimentation At Inlet: Yes

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	3.8	3.95
Height(ft):	2.3	2.55
Apron Length(ft):	0.0	0.0
Water Depth(ft):		0.11
Rustline Height(ft):	0.0
Substrate Depth(ft):	1.8	1.65

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 1.73

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio:

Culvert Gradient: 2.50%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

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

Stream Slope(deg.):	1.7
Stream Flow Stage:	Medium

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Downstream ordinary high water	37.0	2.90
Downstream ordinary high water	78.0	4.00
Downstream ordinary high water	120.0	3.60

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Water Surface Elev (water surface for gradient)	0.00	95.55
D/S Water Surface Elev	51.00	96.60
D/S Water Surface Elev (water surface for gradient)	75.00	96.80
D/S Grade Ctrl (Thalweg) (grade pt at top of riffle)	75.00	96.53
D/S Grade Ctrl (Thalweg) (grade pt a top of riffle)	94.00	97.30
D/S Water Surface Elev	94.00	97.50
D/S Water Surface Elev (outlet water surface)	100.00	97.51
Outlet Invert (on substrate)	100.00	97.40
Outlet Culvert Top	100.00	100.00
Road Elev	124.00	103.05
Inlet Culvert Top	148.20	101.21
Inlet Culvert Invert (on substrate)	148.20	98.80
U/S Water Surface Elev (inlet water surface)	148.20	98.98
U/S Grade Ctrl (Thalweg) (grade pt at top of riffle)	158.20	99.48
U/S Water Surface Elev	158.20	99.71
U/S Water Surface Elev	178.20	99.92
U/S Grade Ctrl (Thalweg) (grade pt at top of riffle)	178.20	99.70

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.