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Shoshone Drainage; Replace and enhance culvert systems

All dates below are specific to the schedule of the Environmental Review and Permitting processes for this project.


PROJECT STATUS
COMPLETE
COMPLETION DATE
Jun 18 2018
2 OUT OF 2
ENVIRONMENTAL REVIEW
AND PERMITTING PROCESSES COMPLETED
SECTOR
Surface Transportation
CATEGORY
DOT Projects
LEAD AGENCY
States
Description: 

The California Department of Transportation (Department), as assigned by the Federal Highway Administration (FHWA), is the lead agency under the National Environmental Policy Act (NEPA). The Department is the lead agency under the California Environmental Quality Act (CEQA). The existing culvert system at State Route (SR) 178, post mile 43.4, in Inyo County, CA (Figure 1) contains two separate drainage systems (OS 1 and OS 2) to accommodate the two main drainage paths within the Amargosa River channel. The westernmost culvert (DS1) is located at PM 43.39, and the eastern culvert location (OS2) is located at PM 43.44 (Figures 2-4). A survey of the existing culverts has determined that the culverts have exceeded their recommended 25 year design service lives, and due to sediments deposited by the river are only operating at 25%-50% of their original capacity. This project proposes to replace both sets of culverts (OS1 and DS2) with pre-cast concrete box culverts to increase hydraulic capacity and reduce the frequency of water overtopping the highway.

Permitting Timetable

The permitting timetable below displays data as reported by agencies. Dates for Environmental Review and Permitting processes (Actions) that are in 'Paused' or 'Planned' status are subject to change and are not indicative of a project's final schedule.

  • For information about extensions, select an Action from the timetable below and select 'View Action Details' at the bottom of the page.

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Overall Project Timetable
STATUS
Schedule
Extension
Ahead of Schedule
Paused

Action Information

For additional information, please select an Action from the Permitting Timetable above.

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SHPO:
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Milestone
Original Target Date
Current Target Date
Milestone Complete