Fish Passage Improvement site 20300976

Fish Passage Site 20300976

Coordinates (dec. deg.): 60.55966°, -151.27333°
Legal Description: S005N011W06
Region: South Central
Road Name: Kenai Spur Road

Datum: NAD83
Quad Name / ITM: Kenai C-4
AWC Stream #: 244-30-10010-2001
Stream Name: Unnamed

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 KEN17-KSH01

site photos

Observers: Elise Idle, Maggie Schaffer, Jeff Sires

Overall Fish Passage Rating: Gray

Tidal: No
Backwatered: No

Step Pools: Yes
Construction Year: 2016

Site Observations:

Beaver Activity
Debris Flow

Comments: Training site for culvert assessments. Site has been replaced with a fish passage culvert. Site has some construction problems. Culvert set within 1% of stream gradient and still has complete bedload coverage and is embedded, however badly constructed steps inside of culvert are causing fish passage issues at lower flows. Upstream step near inlet is collecting debris and causing a fish passage issue. Site rated Gray until issues can be fixed.

Culvert Measurements

ID: 1

Structure Type: Circular pipe (Corrugated steel)

Fish Passage Rating: Gray

Length(ft): 247.0

Inlet Type: Projecting

Outlet Type: Projecting

Corrugation Depth(in.): 1.0

Corrugation Width(in.): 3.0

Condition Rating(1-5): 4

Approach Angle: 0.0

Sedimentation At Inlet: Yes

Inlet Substrate: Cobble

Outlet Substrate: Cobble

	Inlet	Outlet
Width(ft):	9.76	9.78
Height(ft):	7.15	6.69
Apron Length(ft):
Water Depth(ft):		0.28
Rustline Height(ft):
Substrate Depth(ft):	2.61	3.09

Backwatered?: No

Baffles Present: No

Embedded?: Yes

Embedded Depth(ft): 2.61

Outfall Height: 0.0

Outfall Type: At Stream Grade

Constriction Ratio: 1.05

Culvert Gradient: 1.13%

Max Slope:

Max Slope Length:

Comments: 8 constructed step pools through at the barrel of the culvert. Many of the steps were installed incorrectly and are causing fish passage issues at lower flows. The upper steps are collecting large amounts of debris from the upstream wetland and backing up water.

Culvert Observations: