Fish Passage Site 20103956

Coordinates (dec. deg.): 62.79747°, -145.44713°
Legal Description: C012N001W29
Region: South Central
Road Name: Pipeline Access Road

Datum:
Quad Name / ITM: Gulkana D-3
AWC Stream #:
Stream Name: Meirs Creek

Elevation:

Site Comments: PLMP 634.67

Survey Date: Sep 07, 2020

Survey UPD21-TAP7

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Andrew Kastning, Nicole Farnham

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Hydraulic flows exceeded capacity

Comments: Poorly aligned downstream channel, 90 degree turn. Outlet completely underwater. Stream gradient 0.1% upstream and 1.7% downstream of crossing. Submitted by Kirsti Jurica with CRWP.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated aluminum) Fish Passage Rating: Red
 
Length(ft): 48.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.0
Corrugation Width(in.): 3.3
Condition Rating(1-5): 2
Approach Angle: 0.0
Sedimentation At Inlet: Yes
Inlet Substrate: Sand/Silt/Clay (legacy)
Outlet Substrate: Sand/Silt/Clay (legacy)
InletOutlet
Width(ft):6.52
Height(ft):4.39 4.78
Apron Length(ft):
Water Depth(ft): 4.83
Rustline Height(ft):
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height:
Outfall Type: At Stream Grade
Constriction Ratio: 1.04
Culvert Gradient: 3.00%
Max Slope:
Max Slope Length:
 

Comments: Water to deep at outlet to measure Width and substrate depth. Outlet noted as buried in muck. Water to deep to measure rust line and inlet substrate depth.
  Culvert Observations:
  1. Culvert gradient red
  2. Culvert is poorly aligned
  3. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:CobbleCobble
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):0.1
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 6.67
Upstream ordinary high water 6.10
Upstream ordinary high water 5.99

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Outlet Invert (Overflow Pipe) 93.45
Outlet Culvert Top (Pipe #1) 93.79
Top of Pipe Outlet (Overflow Pipe) 96.47
Road Elev (Road Surface) 100.24
U/S Water Surface Elev 0.00 94.02
U/S Thalweg 0.00 90.61
U/S Thalweg 82.00 90.86
U/S Water Surface Elev 82.00 93.93
Inlet Culvert Top (Overflow Pipe) 140.00 99.01
Inlet Culvert Invert (Pipe #1) 140.00 90.96
Top of Pipe Inlet (Pipe #1) 140.00 95.35
Inlet Culvert Invert (Overflow Pipe) 140.00 95.92
U/S Water Surface Elev 140.00 93.88
D/S Water Surface Elev 189.00 93.84
Outlet Invert (Pipe #1) 189.00 89.01
Max Pool Depth 193.00 88.12
D/S Water Surface Elev 193.00 93.84
D/S Water Surface Elev 243.00 93.78
D/S Thalweg 243.00 91.84
D/S Thalweg 245.00 89.25
D/S Water Surface Elev 245.00 92.61
D/S Thalweg 266.00 88.99
D/S Water Surface Elev 266.00 92.59

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