Fish Passage Improvement site 20501057

Fish Passage Site 20501057

Coordinates (dec. deg.): 61.59937°, -149.69269°
Legal Description: S017N002W06
Region: South Central
Road Name: Carousel Way

Datum: NAD83
Quad Name / ITM: Anchorage C-8
AWC Stream #:
Stream Name: Layen Lake Drainage

Elevation:

Site Comments: Crossing at junction of Carousel Way and Skyview Drive. Site 20501056 upstream on ATV trail at outlet of Layen Lake.

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 MSB04-ML031

site photos

Observers: Gary Greenberg, I S

Overall Fish Passage Rating: Green

Tidal: No
Backwatered: Yes

Step Pools:
Construction Year:

Comments: None

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated Metal)

Fish Passage Rating: Green

Length(ft): 34.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.):

Corrugation Width(in.): 0.0

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate:

Outlet Substrate:

	Inlet	Outlet
Width(ft):	2.1
Height(ft):	1.6
Apron Length(ft):
Water Depth(ft):	0.7	0.6
Rustline Height(ft):	0.8
Substrate Depth(ft):

Backwatered?: Yes

Baffles Present: No

Embedded?: No

Outfall Height:

Outfall Type: At Stream Grade

Constriction Ratio: 0.62

Culvert Gradient: 0.15%

Max Slope:

Max Slope Length:

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:
Subdominant:

Stream Slope(deg.):
Stream Flow Stage:

Stream Width Type	Distance From Crossing (ft)	Stream Width (ft)
Upstream bed width	75.0	3.00
Upstream ordinary high water	75.0	3.40

Elevations

Locator ID	Culvert Number	River Distance (ft)¹	Distance From Crossing (ft)²	Relative Elevation (ft)
OHW Left Bank				99.10
OHW Left Bank				99.14
D/S Tailcrest or 1st Thalweg		0.00	3.1	98.84
Max Pool Depth		0.80	2.3	98.73
D/S Thalweg		0.80	2.3	98.73
Outlet Invert	1	3.10	0.0	98.43
Road Elev		20.10		101.72
Inlet Culvert Invert	1	37.10	0.0	98.48
U/S Thalweg	1	41.10	4.0	98.60

Notes:

River distance is measured continuously throughout the survey reach along the thalweg of the stream.
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.

Photos

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