Fish Passage Site 20100727

Coordinates (dec. deg.): 62.78850°, -145.47246°
Legal Description: C012N001W30
Region: South Central
Road Name: Richardson Highway

Datum: NAD83
Quad Name / ITM: Gulkana D-3
AWC Stream #:
Stream Name: Gillespie Creek

Elevation:

Site Comments: Near Milepost 167.5

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 CRWP17-Rich10

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. Beaver Activity

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Slow moving deep palustrine system. Arctic grayling caught upstream. Upstream ponded by beaver dams.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 62.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.19 5.03
Apron Length(ft):
Water Depth(ft): 4.56
Rustline Height(ft):5.0
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.11
Culvert Gradient: 1.03%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Green
 
Length(ft): 62.0
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.75
Condition Rating(1-5): 3
Approach Angle: 0.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):5.0 5.0
Height(ft):5.1 5.0
Apron Length(ft):
Water Depth(ft): 4.48
Rustline Height(ft):5.0
Substrate Depth(ft):0.0 0.0
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 1.11
Culvert Gradient: 1.03%
Max Slope:
Max Slope Length:
  Culvert Observations:
  1. Beaver Activity

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:OrganicOrganic
Stream Slope(deg.):0.5
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 7.60
Downstream ordinary high water 5.20
Downstream ordinary high water 6.30

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 100.00
D/S Grade Ctrl (Thalweg) 0.00 88.26
D/S Water Surface Elev 0.00 92.08
D/S Water Surface Elev 46.00 92.47
D/S Thalweg (below beaver dam) 46.00 91.26
D/S Grade Ctrl (Thalweg) (Beaver dam) 56.00 94.19
D/S Water Surface Elev 56.00 94.26
Max Pool Depth 78.00 89.26
Outlet Pool Water Elev 78.00 94.26
D/S Water Surface Elev 2 81.00 94.26
D/S Water Surface Elev 1 81.00 94.27
Outlet Culvert Top 1 81.00 94.74
Outlet Culvert Top 2 81.00 94.78
Outlet Invert 1 81.00 89.71
Outlet Invert 2 81.00 89.78
Inlet Culvert Invert 1 143.00 90.35
Inlet Culvert Invert 2 143.00 90.42
Inlet Culvert Top 2 143.00 95.52
Inlet Culvert Top 1 143.00 95.54
U/S Water Surface Elev 2 143.00 94.26
U/S Water Surface Elev 1 143.00 94.27
U/S Grade Ctrl (Thalweg) 148.00 90.75
U/S Water Surface Elev 148.00 94.25

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

Gear Type: Minnow Trap (A) Trap Duration(h): 3.0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 3.0
 
Gear Type: Minnow Trap (C) Trap Duration(h): 3.0
Comments: No fish caught
 
Gear Type: Minnow Trap (D) Trap Duration(h): 3.0

Fish Observations

Species: juvenile Arctic grayling Life History: Resident
Total Fish Observed: 5 Fish Measured: 3 Fork Lengths (mm) Min: 70 Max: 90 Mean: 81
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (1)  Not Recorded Minnow Trap (2)  

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