Fish Passage Site 20100564

Coordinates (dec. deg.): 61.51480°, -144.43579°
Legal Description: C004S005E13
Region: South Central
Road Name: Edgerton Highway

Datum: NAD83
Quad Name / ITM: Valdez C-2
AWC Stream #:
Stream Name: Chitina Creek

Elevation:

Site Comments: Culverts connecting one lake to Town Lake near town of Chilitna. Milepost 33.6

Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.

Survey UPD21-EDG5

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

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity
  2. Woody Debris
  3. Constriction ratio gray

Comments: Grates on inlets and outlets. Manipulated channel upstream of ponded area- the range of stream widths reflect this. Site data submitted by Kirsti Jurica with CRWP.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 59.3
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 15.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):2.9 3.12
Height(ft):3.08 3.05
Apron Length(ft):
Water Depth(ft): 0.6
Rustline Height(ft):2.05
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.1
Outfall Type: At Stream Grade
Constriction Ratio: 0.69
Culvert Gradient: 0.30%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity
  2. Woody Debris
  3. Constriction ratio gray
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Gray
 
Length(ft): 57.6
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 2
Approach Angle: 15.0
Sedimentation At Inlet: No
Inlet Substrate: Gravel
Outlet Substrate: None
InletOutlet
Width(ft):2.9 3.65
Height(ft):3.12 2.41
Apron Length(ft):
Water Depth(ft): 0.5
Rustline Height(ft):1.95
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.04
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 0.20%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Woody Debris
  2. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:GravelGravel
Subdominant:OrganicSand
Stream Slope(deg.):
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water
Upstream ordinary high water 11.77
Upstream ordinary high water 7.30
Upstream ordinary high water 15.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev (Road Surface) 574.17
U/S Thalweg 0.00 568.18
U/S Water Surface Elev 0.00 570.57
U/S Water Surface Elev 5.00 570.57
Inlet Culvert Invert (Pipe #1) 5.00 569.90
Inlet Culvert Invert (Pipe #2) 5.00 569.29
Inlet Culvert Top (Pipe #2) 5.00 572.41
U/S Water Surface Elev 5.00 570.53
Inlet Culvert Top (Pipe #1) 5.00 572.67
Outlet Invert 62.00 569.41
D/S Water Surface Elev 62.00 569.91
D/S Water Surface Elev (Debris accumulation due to grates causes slight perch) 64.00 569.99
Outlet Culvert Top (Pipe #2) 64.00 571.82
Outlet Invert (Pipe #1) 64.00 569.39
Outlet Culvert Top (Pipe #1) 64.00 572.44
D/S Water Surface Elev 67.00 569.87
Max Pool Depth (Downstream of Pipe#2) 67.00 569.08
Max Pool Depth (Downstream of Pipe#1) 69.00 569.09
D/S Water Surface Elev 69.00 569.89
D/S Water Surface Elev 78.00 569.82
D/S Grade Ctrl (Thalweg) 78.00 569.34
D/S Water Surface Elev 126.00 569.55
D/S Thalweg (Town Lake) 126.00 568.67

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