Fish Passage Site 20400031

Coordinates (dec. deg.): 61.20500°, -149.89785°
Legal Description: S013N004W24
Region: South Central
Road Name: Arctic Boulevard

Datum: NAD83
Quad Name / ITM: Anchorage A-8
AWC Stream #: 247-50-10050
Stream Name: Chester Creek

Elevation:

Site Comments: Arctic Boulevard and 18TH. DRAINAGE CULVERT FROM 18TH STREET AT OUTLET, CHESTER CREEK WATERSHED

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 ANC04-2A031

Observers: Dean Beers, Joe Miller

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: No

Step Pools:
Construction Year:


Comments: DRAINAGE CULVERT FROM 18TH STREET AT OUTLET, CHESTER CREEK WATERSHED

Culvert Measurements

ID: 1 Structure Type: Pipe-arch (Corrugated Metal) Fish Passage Rating:
 
Length(ft): 73.7
Inlet Type: Headwall
Outlet Type:
Corrugation Depth(in.): 2.0
Corrugation Width(in.): 6.0
Condition Rating(1-5): 4
Approach Angle:
Sedimentation At Inlet:
Inlet Substrate:
Outlet Substrate:
InletOutlet
Width(ft):10.8
Height(ft):7.0
Apron Length(ft):
Water Depth(ft): 1.3
Rustline Height(ft):3.2
Substrate Depth(ft):
Backwatered?:
Baffles Present: No
Embedded?: No
Outfall Height: -1.93
Outfall Type:
Constriction Ratio: 0.42
Culvert Gradient: 1.66%
Max Slope:
Max Slope Length:

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:
Subdominant:
Stream Slope(deg.):
Stream Flow Stage:
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Upstream bank full 75.0 30.40
Upstream bank full 100.0 29.00
Upstream bank full 125.0 35.10
Upstream bank full 150.0 34.00
Upstream bed width 75.0 3.50
Upstream bed width 100.0 8.90
Upstream bed width 125.0 8.30
Upstream bed width 150.0 6.40
Upstream ordinary high water 75.0 26.80
Upstream ordinary high water 100.0 22.30
Upstream ordinary high water 125.0 28.30
Upstream ordinary high water 150.0 26.50

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
OHW Left Bank 88.01
Max Pool Depth 88.09
OHW Left Bank 89.41
U/S Thalweg 1 89.78
D/S Tailcrest or 1st Thalweg 92.13
D/S Thalweg 86.50
Outlet Invert 1 0.00 0.0 86.18
Road Elev 36.50 95.85
Inlet Culvert Invert 1 73.00 0.0 87.40

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: Visual Observation, Ground (A)

Fish Observations

No fish observations occurred during this survey.

Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov