Fish Passage Site 20103958

Coordinates (dec. deg.): 62.68766°, -145.44043°
Legal Description: C011N001W32
Region: South Central
Road Name: Pipeline Acess Road

Quad Name / ITM: Gulkana C-3
AWC Stream #:
Stream Name: Haggard Creek


Site Comments: PLMP 642.48

Survey Date: Sep 07, 2020

Survey UPD21-TAP5

Project Supervisor: Kim Clark, ADFG — Anchorage, AK
Observers: Kirsti Jurica, Nicole Farnham

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:

Site Observations:

  1. Culvert gradient gray
  2. Hydraulic flows exceeded capacity

Comments: Evidence of road blow out downstream. Submitted by Kirsti Jurica with the Copper River Watershed Project.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
Length(ft): 65.8
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 1.125
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 40.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
Width(ft):7.75 7.8
Height(ft):7.31 7.16
Apron Length(ft):
Water Depth(ft): 2.85
Rustline Height(ft):4.49
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.95
Culvert Gradient: 0.90%
Max Slope:
Max Slope Length:

Comments: Pipe gradient is 0.9% using tops and 0.7% using inverts

  Culvert Observations:
  1. Culvert gradient gray
  2. Hydraulic flows exceeded capacity

Stream Measurements

Stream SubstratesUpstreamDownstream
Subdominant:Sand/Silt/Clay (legacy)Cobble
Stream Slope(deg.):0.7
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)
Width (ft)
Downstream ordinary high water 7.30
Downstream ordinary high water 8.10
Upstream ordinary high water 9.80
Upstream ordinary high water 7.20
Upstream ordinary high water 7.50


Locator ID Culvert
Distance (ft)1
Distance From
Crossing (ft)2
Elevation (ft)
Road Elev (Road Surface) 100.27
Road Elev (Low road) 98.63
U/S Thalweg 0.00 92.19
U/S Water Surface Elev 0.00 94.70
U/S Thalweg 115.00 93.07
U/S Water Surface Elev 115.00 93.93
U/S Thalweg 257.00 91.78
U/S Water Surface Elev 257.00 93.58
Inlet Culvert Invert 268.00 91.18
U/S Water Surface Elev 268.00 93.57
Inlet Culvert Top 268.00 98.49
Outlet Culvert Top 334.00 97.86
Outlet Invert 334.00 90.70
D/S Water Surface Elev 334.00 93.55
Max Pool Depth 344.00 91.75
D/S Water Surface Elev 344.00 93.55
D/S Tailcrest or 1st Thalweg 353.00 92.60
D/S Water Surface Elev 353.00 93.57
D/S Thalweg (Downstream scour pool) 421.00 88.57
D/S Water Surface Elev 421.00 91.52


  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