Twain Sinkhole


SCH Number
Lead Agency
Caltrans, District 2 - Redding (California Department of Transportation, District 2)
Document Title
Twain Sinkhole
Document Type
NOE - Notice of Exemption
Project Applicant

Document Description
a sinkhole has developed in the eastbound lane on this two lane highway. The sinking continues to progress dropping 3-5" per day and rapidly expanding in size, currently into the westbound lane. Caltrans proposes to reconstruct the roadway to a depth of five feet.

Contact Information
Emiliano Pro
Caltrans District 2
1657 Riverside Drive
Redding, 96001

Phone : (530) 225-3174


Cross Streets
In Plumas county on State Route 70 at post mile 27.0 near the location of Twain.

Notice of Exemption

Exempt Status
Emergency Project
Type, Section or Code
Sec. 21080(b)(4); 15269(b)(c)
Reasons for Exemption
The road is at risk of failure and with continued growth of the observed sinkhole. A Director's Order has been issued to implement emergency repairs.


Notice of Exemption
2019038616   PDF 70 K

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