Fish Passage Site 20502105

Coordinates (dec. deg.): 62.93300°, -149.66284°
Legal Description: S033N002W21
Region: South Central
Road Name: Alaska Railroad

Datum: NAD83
Quad Name / ITM: Talkeetna Mts D-6
AWC Stream #:
Stream Name: Chulitna River tributary

Elevation:

Site Comments: Alaska RR at MP 278.2

Survey Date: Jun 14, 2011

Survey MSB11-ARR348

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. Woody Debris
  2. Structural Problem
  3. Culvert sagging in middle
  4. Sediment accumulation
  5. Compound gradient in pipe
  6. Culvert gradient red

Comments: Alaska RR at MP 278.2. Lots of Woody Debris upst and dwst and approx .5' grade jump just upst of inlet created by woody debris. Outlet is almost at grade and the concrete pipe has several joints misaligned and broken. Stream channel is thickly vegetated with substantial woody debris piles throughout.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Reinforced concrete) Fish Passage Rating: Red
 
Length(ft): 58.48
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.):
Corrugation Width(in.):
Condition Rating(1-5): 3
Approach Angle: 60.0
Sedimentation At Inlet: Yes
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):4.0 4.0
Height(ft):4.05 3.95
Apron Length(ft):0.0 0.0
Water Depth(ft): 0.06
Rustline Height(ft):1.0
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Embedded Depth(ft): 0.0
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.1
Culvert Gradient: 2.82%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Woody Debris
  2. Structural Problem
  3. Culvert sagging in middle
  4. Sediment accumulation
  5. Compound gradient in pipe
  6. Culvert gradient red

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:OrganicOrganic
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 35.0 3.60
Downstream ordinary high water 70.0 4.20
Downstream ordinary high water 100.0 3.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Grade Ctrl (Thalweg) (Grade point where wooden debris creates a pool) 0.00 82.03
D/S Water Surface Elev 0.00 82.24
D/S Grade Ctrl (Thalweg) (Hydraulic jump created by wooden debris) 40.00 86.05
Outlet Invert 40.00 86.08
D/S Water Surface Elev (Water surface at outlet) 40.00 86.14
D/S Water Surface Elev 40.00 86.18
Outlet Culvert Top 40.00 90.23
Road Elev (Center of railroad tracks) 70.00 100.07
Inlet Culvert Top 98.48 92.16
Inlet Culvert Invert 98.48 87.73
U/S Water Surface Elev (Water surface at inlet. Extremely shallow, not measurable with rod readings.) 98.48 87.73
U/S Grade Ctrl (Thalweg) (Grade jump above inlet) 99.48 88.43
U/S Water Surface Elev 99.48 88.47

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