Fish Passage Site 20200779

Coordinates (dec. deg.): 60.51874°, -145.79230°
Legal Description: C015S003W32
Region: South Central
Road Name: Whitshed Road

Datum: NAD83
Quad Name / ITM: Cordova C-5
AWC Stream #: 221-10-10030
Stream Name: Nicolet Creek

Elevation:

Site Comments: Near MP 3.

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-Whit3

Observers: Kirsti Jurica, Hoots Witsoe

Overall Fish Passage Rating: Green

Tidal: Yes
Backwatered: Yes

Step Pools: No
Construction Year:


Site Observations:

  1. None of this type

Comments: Culvert assessment performed and submitted by the Copper River Watershed Project. Culvert has been replaced. Site is tidal, culvert is backwatered by tailwater control. Site is Green.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Structural aluminum plate) Fish Passage Rating: Green
 
Length(ft): 144.9
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 2.5
Corrugation Width(in.): 9.5
Condition Rating(1-5): 5
Approach Angle: 10.0
Sedimentation At Inlet: No
Inlet Substrate: Cobble
Outlet Substrate: Cobble
InletOutlet
Width(ft):18.25 18.35
Height(ft):15.85 14.25
Apron Length(ft):
Water Depth(ft): 1.72
Rustline Height(ft):
Substrate Depth(ft):2.4 4.1
Backwatered?: Yes
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.75
Culvert Gradient: 1.20%
Max Slope:
Max Slope Length:
 

Comments: Water surface gradient through culvert 0.03%, substrate gradient 0.01%. It does appear there is complete bedload coverage throughout culvert, but not to a suffiencent and consistant depth to be considered embedded. Tailwater control is higher than inlet invert so culvert is backwatered at low tide. Constriction very close to being gray. Substrate depths too deep to measure at inverts and are assumed from the culvert measurments.
  Culvert Observations:
  1. None of this type

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:BoulderCobble
Subdominant:CobbleGravel
Stream Slope(deg.):3
Stream Flow Stage:Low
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream ordinary high water 24.50
Upstream ordinary high water 24.10
Upstream ordinary high water 23.90

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 38.89
D/S Grade Ctrl (Thalweg) 0.00 8.95
D/S Water Surface Elev (Tide height at 1315 on 10/23/1760.48426, -145.43273) 0.00 9.26
D/S Tailcrest or 1st Thalweg 100.00 10.72
D/S Water Surface Elev 100.00 10.89
Outlet Pool Water Elev 132.00 10.90
Max Pool Depth 132.00 9.94
Outlet Culvert Top 150.00 23.45
Outlet Invert (on substrate) 150.00 9.20
D/S Water Surface Elev 150.00 10.92
Inlet Culvert Invert (on substrate) 295.00 9.30
U/S Water Surface Elev 295.00 25.15
U/S Grade Ctrl (Thalweg) 301.00 10.56
U/S Water Surface Elev 301.00 11.53
U/S Grade Ctrl (Thalweg) 323.00 11.64
U/S Water Surface Elev 323.00 12.23
U/S Grade Ctrl (Thalweg) 443.00 15.41
U/S Water Surface Elev 443.00 16.00

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): 18.0
 
Gear Type: Minnow Trap (B) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (C) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (D) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (E) Trap Duration(h): 18.0
Comments: No fish caught
 
Gear Type: Minnow Trap (F) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (G) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (H) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (I) Trap Duration(h): 18.0
 
Gear Type: Minnow Trap (J) Trap Duration(h): 18.0

Fish Observations

Species: juvenile/adult cutthroat trout Life History: Unknown
Total Fish Observed: 13 Fish Measured: 6 Fork Lengths (mm) Min: 58 Max: 120 Mean: 89
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (3)  Not Recorded Minnow Trap (1)  Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (3)  Not Recorded Minnow Trap (2)  
 
Species: juvenile/adult Dolly Varden Life History: Unknown
Total Fish Observed: 4 Fish Measured: 2 Fork Lengths (mm) Min: 116 Max: 125 Mean: 120
Collected/Observed by Gear Type: Not Recorded Minnow Trap (3)  Not Recorded Minnow Trap (1)  
 
Species: coastrange sculpin Life History: Unknown
Total Fish Observed: 27 Fish Measured: 8 Fork Lengths (mm) Min: 72 Max: 102 Mean: 90
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (1)  Not Recorded Minnow Trap (11)  Not Recorded Minnow Trap (3)  Not Recorded Minnow Trap (10)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 21 Fish Measured: 7 Fork Lengths (mm) Min: 80 Max: 119 Mean: 105
Collected/Observed by Gear Type: Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (4)  Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (2)  Not Recorded Minnow Trap (6)  Not Recorded Minnow Trap (5)  

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