Interstate 10/Monterey Avenue Interchange Improvement Project

3 Documents in Project


SCH Number
Lead Agency
Caltrans 8 (San Bernardino) (California Department of Transportation, District 8)
Document Title
Interstate 10/Monterey Avenue Interchange Improvement Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Riverside County General Plan / General Commercial (C-1 / C-P)

Document Description
The City of Palm Desert (City), in cooperation with the California Department of Transportation (Department), proposes to construct improvements to part of the existing Interstate 10 (I-10) at Monterey Avenue Interchange. The proposed project would construct a new westbound on-ramp and realign/relocate the existing westbound off-ramp to connect with Varner Road. As a result of these improvements, the existing intersection of the westbound on- and off-ramps would be removed on Monterey Avenue, thereby increasing the intersection spacing between the eastbound ramps and Varner Road along Monterey Avenue. The proposed improvements to this interchange are intended to address northbound traffic on Monterey and improve the westbound ramps to I-10 to level of service (LOS) A during the a.m. and p.m. peak hour. Proposed improvements consist of the following: Construction of a new loop entrance ramp from northbound Monterey Avenue to westbound I-10, elimination of the existing intersection of the westbound on- and off-ramps on Monterey Avenue, and realignment of the westbound exit ramp to provide a hook configuration off-ramp approximately 160 m (525 ft) east of Monterey Avenue along Varner Road. In addition, the left turn lanes on southbound Monterey Avenue to eastbound I-10 will be lengthened to provide sufficient stacking for future traffic volumes. There would be no improvements to the existing Monterey Avenue overcrossing, however, a tieback retaining wall would be constructed in the vicinity of the northerly abutment to provide clearance for the proposed westbound loop on-ramp. Additionally, ramp metering would be installed on the proposed westbound loop on-ramp and existing westbound on-ramp. The project would be constructed in two phases. Realignment of the westbound off-ramp would be constructed in the first phase while maintaining the existing westbound off-ramp open. Once the realigned westbound off-ramp is constructed, the existing westbound off-ramp would be removed and the new westbound on-ramp would be constructed in phase two.

Contact Information
Marie Petry
California Department of Transportation, District 8
464 West 4th Street
San Bernardino, CA 92401-1400

Phone : (909) 383-6379


33°48'23.0"N 116°23'17.5"W
Rancho Mirage
Cross Streets
Varner Road
Total Acres
State Highways
Union Pacific

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Other (Interchange Improvement)
Local Action
Other Action Other Action: Interchange
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Toxic/Hazardous Traffic/Circulation Water Quality Land Use
Reviewing Agencies
Air Resources Board, Transportation Projects California Department of Parks and Recreation California Highway Patrol California Public Utilities Commission California Regional Water Quality Control Board, Colorado River Basin Region 7 Department of Fish and Wildlife, Region 6 Department of Toxic Substances Control Department of Water Resources Resources Agency Resources, Recycling and Recovery California Native American Heritage Commission

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 or via phone at (916) 445-0613.

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