Fish Passage Site 20502059

Coordinates (dec. deg.): 63.18258°, -147.29272°
Legal Description: F020S002E14
Region: South Central
Road Name: Valdez Mining District Road

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

Elevation:

Site Comments: None

Survey Date: Jul 06, 2011

Survey MSB11-VMD04

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. Constriction ratio red
  2. Culvert sagging in middle
  3. Mechanical damage or joints parting
  4. Culvert gradient red
  5. Shallow fill; inadequate roadfill volume above culvert
  6. Outfall height red

Comments: Inlet of Circular Pipe squashed into more of an Oval shape and the top is sagging and sides crushed.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 19.95
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 1
Approach Angle: 60.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):4.7 4.0
Height(ft):2.9 4.0
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.88
Rustline Height(ft):1.15
Substrate Depth(ft):0.4 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.68
Outfall Type: Cascade Over Rip-Rap
Constriction Ratio: 0.4
Culvert Gradient: 1.10%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Constriction ratio red
  2. Culvert sagging in middle
  3. Outfall height red
  4. Mechanical damage or joints parting
  5. Culvert gradient red
  6. Shallow fill; inadequate roadfill volume above culvert

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelCobble
Subdominant:CobbleGravel
Stream Slope(deg.):4.3
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 50.0 12.80
Downstream ordinary high water 82.0 11.00
Downstream ordinary high water 168.0 11.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (middle of continuous riffle) 0.00 88.87
D/S Water Surface Elev 0.00 89.55
D/S Grade Ctrl (Thalweg) (middle of continuous riffle) 62.00 91.51
D/S Water Surface Elev 62.00 92.19
Max Pool Depth (Outlet pool elevation) 160.00 95.56
Outlet Pool Water Elev (Water surface at outlet pool) 160.00 96.45
D/S Water Surface Elev (Water surface at outlet invert) 168.00 97.13
Outlet Invert (On pipe) 168.00 96.25
Outlet Culvert Top 168.00 100.39
Road Elev 178.00 101.45
Inlet Culvert Top 187.95 100.61
Inlet Culvert Invert (On pipe) 187.95 97.33
U/S Water Surface Elev (Water surface a inlet) 187.95 98.43
U/S Grade Ctrl (Thalweg) (Middle of continuous riffle) 247.95 99.42
U/S Water Surface Elev 247.95 100.11

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