Fish Passage Site 20300205

Coordinates (dec. deg.): 60.95693°, -149.11571°
Legal Description: S010N002E16
Region: South Central
Road Name: Alyeska View Avenue

Datum: NAD83
Quad Name / ITM: Seward D-6
AWC Stream #:
Stream Name: Glacier Creek tributary

Elevation:

Site Comments: Driveway off of Alyeska View Avenue. Just upstream of 20300204 and downstream of 20300206.

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-ALY05

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

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools: No
Construction Year: 2019


Comments: Stream is ditched, downstream banks are rip rapped. Upstream banks show some erosion. Poor alignment based on 90 degree angle directly downstream.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 48.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Gravel
InletOutlet
Width(ft):5.04 4.99
Height(ft):3.45 3.65
Apron Length(ft):
Water Depth(ft): 0.21
Rustline Height(ft):0.48
Substrate Depth(ft):1.55 1.2
Backwatered?: No
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 1.2
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.0
Culvert Gradient: 2.60%
Max Slope:
Max Slope Length:
 

Comments: Pipe gradient is designed at 2.02 %. Designs are for 60" circular pipe.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:GravelGravel
Stream Slope(deg.):2.7
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number
River
Distance (ft)1
Distance From
Crossing (ft)2
Relative
Elevation (ft)
D/S Thalweg 0.00 94.22
D/S Water Surface Elev 0.00 94.71
D/S Thalweg 5.50 94.83
D/S Water Surface Elev 5.50 95.12
Outlet Culvert Top 9.00 98.73
Outlet Invert 9.00 95.06
D/S Water Surface Elev 9.00 95.27
Inlet Culvert Top 57.60 100.01
Inlet Culvert Invert 57.60 96.53
U/S Water Surface Elev 57.60 96.70
U/S Grade Ctrl (Thalweg) 75.60 97.28
U/S Water Surface Elev 75.60 97.65

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

Gear Type: Minnow Trap (A) Trap Duration(h): 3.4333334
Channel Type: Main Channel (>50% of water flow)
Comments: stream was ditched. 5 traps were set to survey 3 culverts.

Fish Observations

Species: juvenile Dolly Varden Life History: Resident
Total Fish Observed: 5 Fish Measured: 5 Fork Lengths (mm) Min: 50 Max: 103 Mean: 86
Collected/Observed by Gear Type: At Site Minnow Trap (2)  

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