Fish Passage Site 20502066

Coordinates (dec. deg.): 63.16914°, -147.47516°
Legal Description: F020S001E24
Region: South Central
Road Name: Valdez Mining District Road

Datum: NAD83
Quad Name / ITM: Healy A-1
AWC Stream #:
Stream Name: Valdez Creek tributary

Elevation:

Site Comments: None

Survey Date: Jul 07, 2011

Survey MSB11-VMD05

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

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Structural Problem
  3. Mechanical damage or joints parting

Comments: Pipe is badly smashed, bent and caved in. Upst area is a bog marsh and the inlet area creates artificial ponding.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 48.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.0
Condition Rating(1-5): 1
Approach Angle: 70.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: Gravel
InletOutlet
Width(ft):1.8 1.85
Height(ft):1.9 1.3
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.79
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.2
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.91
Culvert Gradient: 4.17%
Max Slope:
Max Slope Length:
 

Comments: Used W.S. for pipe gradient.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicGravel
Subdominant:GravelOrganic
Stream Slope(deg.):9
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 20.0 2.00
Downstream ordinary high water 60.0 1.85
Downstream ordinary high water 100.0 2.10

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Continuous riffle) 0.00 93.44
D/S Water Surface Elev 0.00 93.79
D/S Grade Ctrl (Thalweg) (Top of riffle) 25.00 95.70
D/S Water Surface Elev 25.00 96.05
D/S Water Surface Elev (Water surface at outlet invert) 30.00 96.21
Outlet Invert (On substrate) 30.00 95.42
Road Elev 54.00 100.02
Inlet Culvert Invert (On pipe) 78.00 97.89
U/S Water Surface Elev (Water surface at inlet invert) 78.00 98.21
U/S Water Surface Elev 83.00 98.34
Max Pool Depth (Max pool of marsh area upstream of inlet) 83.00 97.26

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