Fish Passage Site 20400025

Coordinates (dec. deg.): 61.31548°, -149.56738°
Legal Description: S014N002W12
Region: South Central
Road Name: Old Eagle River Road

Datum: NAD83
Quad Name / ITM: Anchorage B-7
AWC Stream #:
Stream Name: Meadow Creek

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 UPD21-OLD01

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Kim Clark, Michael Mazzacavallo

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year: 2014


Comments: Storm drain outfall embedded in headwall, wider channel at outlet created to accommodate this. Willow stakes at inlet doing well. Bar forming on right bank inside culvert. There is an island upstream of the culvert- potentially evidence of sedimentation upstream from previous culvert. Island top and bottom measurements were included in long.pro

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural steel plate) Fish Passage Rating: Green
 
Length(ft): 67.38
Inlet Type: Headwall
Outlet Type: Headwall
Corrugation Depth(in.): 6.0
Corrugation Width(in.): 15.5
Condition Rating(1-5): 5
Approach Angle: 6.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):24.0 23.8
Height(ft):5.7 4.5
Apron Length(ft):
Water Depth(ft): 0.56
Rustline Height(ft):
Substrate Depth(ft):1.3 2.5
Backwatered?: No
Baffles Present: No
Embedded?: Maybe
Embedded Depth(ft): 1.3
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 2.07
Culvert Gradient: 4.00%
Max Slope:
Max Slope Length:
 

Comments: Stream gradient is from designs. Culvert dimensions per design are 67'9" long x 6'10" tall x 25'4" wide. Substrate depth is calculated using the measured height of the inlet and outlet of the culvert and the height on the designs.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Stream
Width (ft)
Downstream ordinary high water 105.0 10.30
Downstream ordinary high water 135.0 11.90
Downstream ordinary high water 158.0 12.40

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Thalweg 0.00 83.95
D/S Water Surface Elev 0.00 84.66
D/S Grade Ctrl (Thalweg) 67.00 87.41
D/S Water Surface Elev 67.00 88.18
D/S Grade Ctrl (Thalweg) (Constructed grade control) 78.00 88.16
D/S Water Surface Elev 78.00 89.10
Outlet Culvert Top 90.00 93.85
Outlet Invert 90.00 88.75
D/S Water Surface Elev 90.00 89.31
Inlet Culvert Top 158.80 97.19
Inlet Culvert Invert 158.80 91.39
U/S Water Surface Elev 158.80 92.40
U/S Thalweg 167.80 92.01
U/S Water Surface Elev 167.80 92.96
U/S Thalweg 231.80 94.74
U/S Water Surface Elev 231.80 95.61
Misc. (bottom of the island) 280.40 97.04
Misc. (top of the island) 356.80 99.91

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

No fish sampling occurred during this survey.

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov