Fish Passage Improvement site 20501469

Fish Passage Site 20501469

Coordinates (dec. deg.): 62.14444°, -149.92053°
Legal Description: S024N004W25
Region: South Central
Road Name: Malaspina Loop

Datum: WGS84
Quad Name / ITM: Talkeetna Mts A-6
AWC Stream #:
Stream Name: Unnamed

Elevation:

Site Comments: None

Survey Date: May 22, 2009

Survey PRK09-MAL02

site photos

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools:
Construction Year:

Site Observations:

Constriction ratio red
Outfall height red
Culvert gradient red

Comments: **Updated site photos added from 9/13/16 site visit from Sampling Unmapped Streams in the MSB. Fish information in AFFI.** Length measured with tape through culvert. Culvert has bend, appears to be 2 pipes end to end.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Red

Length(ft): 60.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.67

Condition Rating(1-5): 3

Approach Angle: 34.0

Sedimentation At Inlet: Yes

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	2.0	2.0
Height(ft):	2.0	2.0
Apron Length(ft):
Water Depth(ft):		0.31
Rustline Height(ft):	0.9
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 1.37

Outfall Type: Cascade Over Rip-Rap

Constriction Ratio: 0.36

Culvert Gradient: 5.90%

Max Slope:

Max Slope Length:

Culvert Observations:

Constriction ratio red
Outfall height red
Culvert gradient red

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	50.0	4.70
Upstream ordinary high water	90.0	5.50
Upstream ordinary high water	110.0	4.50
Upstream ordinary high water	140.0	5.50

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
U/S Headwater	1			93.72
(water coming out of rd fill, d/s side - see sketch/photos)				97.50
D/S Grade Ctrl (Thalweg)	1	0.00	29.0	86.69
D/S Water Surface Elev (ws at GP - wd = 0.45)	1	0.00	29.0	87.14
Outlet Pool Water Elev	1	14.50	14.5	88.64
D/S Water Surface Elev (ws at TWC (TWS) - wd = 0.52)	1	14.50	14.5	89.16
D/S Thalweg (bottom of out pool)	1	20.00	9.0	88.32
D/S Thalweg	1	24.00	5.0	88.51
D/S Thalweg	1	25.00	4.0	88.51
D/S Water Surface Elev (ws at gp)	1	25.40	3.6	93.93
D/S Thalweg	1	28.50	0.5	89.10
Outlet Invert	1	29.00	0.0	89.70
Road Elev	1	59.00		105.32
Inlet Culvert Invert	1	89.00	0.0	93.24
U/S Grade Ctrl (Thalweg) (1st TC u/s - grade pt is caused by BO constricting flow)	1	92.60	3.6	93.03

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.