Fish Passage Site 20501197

Coordinates (dec. deg.): 61.57662°, -149.51175°
Legal Description: S017N001W07
Region: South Central
Road Name: Mack Road

Datum: WGS84
Quad Name / ITM: Anchorage C-7
AWC Stream #:
Stream Name: Wetland connector

Elevation:

Site Comments: Connects wetlands along RR

Survey Date: Jul 30, 2009

Survey MSB09-MAC01

Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Culvert gradient red
  2. Hydraulic flows exceeded capacity
  3. Inlet apron too steep
  4. Other, including vibrations, cavitation, etc.

Comments: Pipe appears plugged; both aprons bent up; water flows down inlet apron and eddies in upper few feet of pipe. **Updated Site photos added from 9/26/16 site visit from Sampling Unmapped Streams in the MSB project. Fish data is in AFFI.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 116.0
Inlet Type: Flared Inlet
Outlet Type: Flared Inlet
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 2.67
Condition Rating(1-5): 2
Approach Angle: 24.0
Sedimentation At Inlet: No
Inlet Substrate: None
Outlet Substrate: None
InletOutlet
Width(ft):2.9 3.0
Height(ft):2.9 2.6
Apron Length(ft):4.9 4.8
Water Depth(ft): 2.13
Rustline Height(ft):1.8
Substrate Depth(ft):0.0 0.0
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio:
Culvert Gradient: 1.30%
Max Slope: 14.7
Max Slope Length:
  Culvert Observations:
  1. Culvert gradient red
  2. Hydraulic flows exceeded capacity
  3. Inlet apron too steep
  4. Other, including vibrations, cavitation, etc.

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClaySilt/Clay
Subdominant:Silt/ClaySilt/Clay
Stream Slope(deg.):
Stream Flow Stage:Medium

No stream width data available.

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
D/S Thalweg (end of outlet apron) 1 0.00 4.8 96.15
Outlet Pool Water Elev (d/s is flat pond) 1 4.80 97.92
Outlet Invert ((east end)) 1 4.80 0.0 95.79
Road Elev 1 62.90 105.59
Inlet Culvert Invert ((west end)) 1 120.80 0.0 97.30
U/S Headwater 1 120.80 97.91
U/S Grade Ctrl (Thalweg) (end of inlet apron) 1 125.70 4.9 98.02
U/S Water Surface Elev (@GP) 1 125.80 4.9 98.18
U/S Thalweg 1 125.80 5.0 97.18

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): 0.75
Comments: 15ft u/s
 
Gear Type: Minnow Trap (B) Trap Duration(h): 0.75
Comments: 20ft d/s

Fish Observations

Species: stickleback-unspecified Life History: Resident
Total Fish Observed: 51 Fish Measured: Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (10)  Upstream Minnow Trap (41)  
 
Species: juvenile coho salmon Life History: Anadromous
Total Fish Observed: 1 Fish Measured: 1 Fork Lengths (mm) Min: 95 Max: 95 Mean: 95
Collected/Observed by Gear Type: Upstream Minnow Trap (1)  

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