Emergency Repair of Existing Downdrain
Summary
SCH Number
2005108150
Public Agency
California Department of Transportation, District 1
Document Title
Emergency Repair of Existing Downdrain
Document Type
NOE - Notice of Exemption
Received
Posted
10/5/2005
Document Description
An existing 18-inch diameter x 40-ft long CSP down-drain, located at post mile 86.62 on route 101 in Humboldt County, is failing and in need of immediate repair. The down-drain, which carries a small amount of run-off from adjacent City of Arcata streets down into the highway drainage system, has a completely perforated invert with a large scour hole immediately below the pipe. The scour hole is 5-ft wide and 5-ft deep and runs almost the entire length of the facility. Due to the type of soil that the embankmnet is constructed of, the scour hole has eroded in such a manner that the walls of the scour hole are remaining vertical, but the depth of the hole is continuing to increase. Immediately below the current vertical limits of the scour hole is a city of Arcata sewer main line. The line is an 8-in diameter Vitrified Clay pipe, which is quite susceptible to breaking whenever unequal forces are applied. This type of conduit has little to no ductility. The City has contacted Caltrans and voiced their concerns regarding the existing facility and how it is placing their sewer line in jeopardy. The facility must be urgently replaced boefore the upcoming winter rains.
Contact Information
Name
Scott Williams
Agency Name
Department of Transportation, District 1
Contact Types
Lead/Public Agency
Phone
Location
Cities
Arcata
Counties
Humboldt
Notice of Exemption
Exempt Status
Emergency Project
Type, Section or Code
Section 15269
Reasons for Exemption
The existing facility must be urgently replaced prior to the upcoming winter rains. A Directors Emergency Order has been prepared and approved by the Department.
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.