Fish Passage Improvement site 20403472

Fish Passage Site 20403472

Coordinates (dec. deg.): 61.12636°, -149.79459°
Legal Description: S012N003W15
Region: South Central
Road Name: Zoo Access Road

Datum: NAD83
Quad Name / ITM: Anchorage A-8
AWC Stream #: 247-60-10340-2018-3006
Stream Name: Little Campbell Creek, South Fork

Elevation:

Site Comments: Road is off of E104th Ave.

Survey Date: Aug 22, 2016

Survey UPDATE-ZOO1

site photos

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Mark Eisenman

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year: 2015

Site Observations:

Culvert is poorly aligned

Comments: Culvert was replaced on 9/25/2015 as a priority part of the Little Campbell Creek Watershed Management Plan. Another culvert about 100 feet downstream on a private driveway at the end of E104th Ave was also replaced as part of this project. Bioengineering along stream banks has established well, willow and vegmat have all survived. Zoo fence downstream about 30 feet from outlet. Fish observed upstream in channel and in upstream ponds on zoo property. No trapping, water levels too low in creek.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating: Green

Length(ft): 60.7

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 4.5

Condition Rating(1-5): 5

Approach Angle: 57.0

Sedimentation At Inlet: No

Inlet Substrate: Cobble

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	11.6	10.8
Height(ft):	5.6	5.9
Apron Length(ft):
Water Depth(ft):
Rustline Height(ft):
Substrate Depth(ft):	6.0	5.9

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 5.9

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio:

Culvert Gradient: 2.67%

Max Slope:

Max Slope Length:

Comments: Lots of silty sediment inside of culvert. Nice constructed step pools inside barrel of culvert.

Culvert Observations:

Culvert is poorly aligned

Stream Measurements

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

Stream Slope(deg.):	2.64
Stream Flow Stage:	Low

No stream width data available.

Elevations

Locator ID	River Distance (ft)¹	Relative Elevation (ft)
Road Elev		103.13
D/S Thalweg (At zoo fence line)	0.00	92.02
D/S Water Surface Elev	0.00	92.24
D/S Water Surface Elev	9.00	92.41
D/S Thalweg (Middle of outlet riffle)	9.00	92.20
Outlet Culvert Top	23.60	98.35
Outlet Invert (On substrate)	23.60	92.60
D/S Water Surface Elev	23.60	92.93
Inlet Culvert Invert (On substrate, 1st resting)	94.30	94.42
U/S Water Surface Elev	94.30	94.52
Inlet Culvert Top	94.30	100.00
U/S Grade Ctrl (Thalweg)	114.30	95.05
U/S Water Surface Elev (Stream gradient)	114.30	95.42
U/S Grade Ctrl (Thalweg)	263.30	99.07
U/S Water Surface Elev (Stream gradient)	263.30	99.35

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.