Mammoth Lakes 395 Wildlife Crossing (Geotech Drilling Operations)
2 Documents in Project
Summary
SCH Number
2025080696
Public Agency
California Department of Transportation, District 9
(DOT)
Document Title
Mammoth Lakes 395 Wildlife Crossing (Geotech Drilling Operations)
Document Type
NOE - Notice of Exemption
Received
Posted
9/2/2025
Document Description
The California Department of Transportation (Caltrans) is planning to collect soil information for two proposed wildlife crossings on U.S. Route 395 for the Mammoth Lakes 395 Wildlife Crossing project. The information is needed to provide foundation recommendations for both wildlife crossing structures. A total of five mud-rotary borings up to 70 feet deep are proposed; 2 borings at post mile R19.79 and 3 borings at post mile 20.23. The cuttings settle out in the mud tub and are collected in 55-gallon drums for disposal offsite. The 4-inch diameter hole will be backfilled to the ground surface with cement ground. All proposed borings will occupy an approximate area of 30 feet by 30 feet. No impacts to vegetation are anticipated. This project will take place completely within the Caltrans Right-of-Way.
Contact Information
Name
Ryan Spaulding
Agency Name
California Department of Transportation (District 9)
Job Title
Senior Environmental Scientist (Specialist)
Contact Types
Lead/Public Agency / Parties Undertaking Project
Phone
Location
Cities
Unincorporated
Counties
Mono
Regions
Unincorporated
State Highways
U.S. Route 395
Other Location Info
On U.S. Route 395, from post miles R16.1 to 27.12, in Mono County.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15306 Class 6
Reasons for Exemption
All work will be on disturbed areas within Caltrans right-of-way. No known environmental resources will be impacted by the project.
County Clerk
Mono
Attachments
Notice of Exemption
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