Fish Passage Improvement site 20501390

Fish Passage Site 20501390

Coordinates (dec. deg.): 62.60528°, -150.22652°
Legal Description: S029N005W16
Region: South Central
Road Name: Parks Highway

Datum: NAD83
Quad Name / ITM: Talkeetna C-1
AWC Stream #:
Stream Name: Chulitna River tributary

Elevation:

Site Comments: Chulitna River watershed,

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-PRK15

site photos

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

Constriction ratio red
Outfall height red
Culvert gradient red
Woody Debris
Inlet perch

Comments: Culvert has a large inlet perch of about 2.5' and a very high stream velocity near inlet making measurements difficult. Culvert was re-surveyed on 9/7/11 to collect complete data for rating. One coho trapped at culvert outlet. Upst and dwst area too brushy to survey a stream gradient. **Updated site photos and fish sampling information added from 9/22/16 site visit from Sampling Unmapped Streams in the MSB project. High water during site visit.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Structural steel plate)

Fish Passage Rating: Red

Length(ft): 255.8

Inlet Type: Projecting

Outlet Type: Headwall

Corrugation Depth(in.): 2.0

Corrugation Width(in.): 6.0

Condition Rating(1-5): 2

Approach Angle: 2.0

Sedimentation At Inlet: Yes

Inlet Substrate: None

Outlet Substrate: None

	Inlet	Outlet
Width(ft):	4.85	5.1
Height(ft):	5.4	5.3
Apron Length(ft):	0.0	0.0
Water Depth(ft):		0.42
Rustline Height(ft):	3.0
Substrate Depth(ft):	0.0	0.0

Backwatered?: No

Baffles Present: No

Embedded?: No

Outfall Height: 2.48

Outfall Type: Free Fall In To Pool

Constriction Ratio: 0.46

Culvert Gradient: 5.10%

Max Slope:

Max Slope Length:

Culvert Observations:

Constriction ratio red
Outfall height red
Culvert gradient red
Woody Debris
Inlet perch

Stream Measurements

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

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

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream ordinary high water	73.0	9.30
Upstream ordinary high water	115.0	10.50
Upstream ordinary high water	150.0	11.60

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
D/S Water Surface Elev	0.00	53.11
D/S Tailcrest or 1st Thalweg (tailwater control)	0.00	52.71
Max Pool Depth (max pool depth)	3.00	51.08
D/S Water Surface Elev (water surface below outlet)	6.00	52.99
Outlet Invert (on pipe)	6.00	55.05
D/S Water Surface Elev (water surface at outlet)	6.00	55.47
Outlet Culvert Top	6.00	60.34
Road Elev	130.00	115.38
Inlet Culvert Top	262.00	73.45
Inlet Culvert Invert (on pipe)	262.00	68.06
U/S Water Surface Elev	262.00	68.33
U/S Thalweg (Tailcrest) (cascade flowing into inlet)	263.00	70.38
U/S Water Surface Elev	288.00	71.34
U/S Thalweg (profile pt)	288.00	71.75

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.