Fish Passage Improvement site 20401314

Fish Passage Site 20401314

Coordinates (dec. deg.): 61.54214°, -149.23051°
Legal Description: S017N001E23
Region: South Central
Road Name: Old Matanuska Road

Datum: NAD83
Quad Name / ITM: Anchorage C-6
AWC Stream #:
Stream Name: Rabbit Slough tributary

Elevation:

Site Comments: None

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 MSCS1-RS086

site photos

Observers: Edward Weiss, Olof Jacobsson

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools:
Construction Year:

Comments: 9/19/16 site visit photos and fish sample data added from Sampling Unmapped Streams in the MSB project.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating:

Length(ft): 33.0

Inlet Type: Projecting

Outlet Type:

Corrugation Depth(in.): 0.5

Corrugation Width(in.): 2.67

Condition Rating(1-5):

Approach Angle:

Sedimentation At Inlet:

Inlet Substrate: Gravel

Outlet Substrate: Gravel

	Inlet	Outlet
Width(ft):	4.0	4.0
Height(ft):	2.4	2.15
Apron Length(ft):
Water Depth(ft):	0.9	0.55
Rustline Height(ft):
Substrate Depth(ft):

Backwatered?:

Baffles Present: No

Embedded?: Yes

Outfall Height:

Outfall Type:

Constriction Ratio:

Culvert Gradient: -1.15%

Max Slope:

Max Slope Length:

Culvert Observations:

None of this type

Stream Measurements

Stream Substrates	Upstream	Downstream
Dominant:	Gravel	Gravel
Subdominant:

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)
Inlet Culvert Top	1			94.16
Outlet Culvert Top	1			94.30
U/S Thalweg				91.13
Outlet Invert	1	0.00	0.0	92.13
Road Elev		16.50		94.41
Road Elev		16.50		94.50
Inlet Culvert Invert	1	33.00	0.0	91.75

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

Gear Type: Minnow Trap (A)		Trap Duration(h): 55

Gear Type: Minnow Trap (B)		Trap Duration(h): 55

Fish Observations

Species: juvenile/adult Alaska blackfish		Life History: Resident
Total Fish Observed: 8	Fish Measured: 4	Fork Lengths (mm) Min: 55 Max: 120 Mean: 103
Collected/Observed by Gear Type: Upstream Minnow Trap (8)

Species: juvenile/adult stickleback-unspecified		Life History: Resident
Total Fish Observed: 1	Fish Measured:	Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Upstream Minnow Trap (1)

Species: no fish collected or observed		Life History: Not Applicable
Total Fish Observed: 0	Fish Measured:	Fork Lengths (mm) Min: Max: Mean:
Collected/Observed by Gear Type: Downstream Minnow Trap (0)

Photos

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