Repair Storm Damaged Drainage System
Summary
SCH Number
2010038073
Public Agency
California Department of Transportation, District 1
Document Title
Repair Storm Damaged Drainage System
Document Type
NOE - Notice of Exemption
Received
Posted
3/8/2010
Document Description
A tree fell across a drainage system during the January 19, 2010 storm event. The fallen tree crushed a downdrain which resulted in embankment erosion and down-drain spearation. It was determined that the downdrain upstream of the separation was also significantly damaged by the high bed load resulting in invert erosion. The crushed and separated downdrain accepts roadway runoff from two drainage inlets on the US 101 four lane facility over a nearly 500' length of roadway. The flow through this system consists of roadway runoff that can carry large amounts of gravel and small rock. The high peak storm flow that occurs at this location if left unrepaired during significant rainrfall events could result in a loss of roadway enbankment and Route 101. Immediate action is considered necessary to prevent embankment failure and possible loss of the roadway.
Proposed work includes replacing the separated and damage downdrain, slope repair, access development and traffic control.
Contact Information
Name
Steve Grantham
Agency Name
California Department of Transportation, District 1
Contact Types
Lead/Public Agency
Phone
Location
Counties
Humboldt
Notice of Exemption
Exempt Status
Emergency Project
Type, Section or Code
21080(b)(4), 15269(b)(c)
Reasons for Exemption
It was determined that the project is an emergency project exempt under Section 15269(b). The project proposes to repair publicly owned facility necessary to maintain service essential to the public safety.
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.