Fish Passage Site 20501466

Coordinates (dec. deg.): 61.98929°, -149.99706°
Legal Description: S022N004W22
Region: South Central
Road Name: Hidden Hills Road

Datum: WGS84
Quad Name / ITM: Anchorage D-8
AWC Stream #:
Stream Name: Caswell 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 MSB23-MS088

Project Supervisor: Michael Mazzacavallo, Alaska Department of Fish and Game — Anchorage, AK
Observers: Michael Mazzacavallo, Beth Evers, Kat Leavitt

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year: 2021


Site Observations:

  1. None of this type

Comments: Juvenile fish spotted upstream. Current from upstream does not continue through pipe, backwatered. Multiple main channels upstream and downstream from culvert but flooded throughout area.

Culvert Measurements

ID: 1 Structure Type: Box culvert (Structural aluminum plate) Fish Passage Rating: Green
 
Length(ft): 52.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 9.5
Condition Rating(1-5): 5
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: Organic
InletOutlet
Width(ft):16.03 15.86
Height(ft):6.15 6.25
Apron Length(ft):
Water Depth(ft):0.0 2.75
Rustline Height(ft):0.0
Substrate Depth(ft):2.1 2.0
Backwatered?: Yes
Baffles Present: No
Embedded?: Yes
Embedded Depth(ft): 2.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 1.21%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0.2
Stream Flow Stage:High

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
U/S Water Surface Elev 0.00 95.78
Inlet Culvert Top 50.00 99.57
Inlet Culvert Invert 50.00 93.32
U/S Water Surface Elev (Culvert water surface) 50.00 95.47
Outlet Invert 102.90 92.73
Outlet Culvert Top 102.90 98.93
D/S Water Surface Elev 112.90 95.48
D/S Water Surface Elev 188.90 95.40

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.

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