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Producers of Lime Used in Soil Stabilization or Aggregate Lime Treatment in HMA

Last edit date: 10/8/2025

General: Products on this Authorized Material List (AML) have been evaluated and found acceptable for use on California Department of Transportation (Caltrans) projects, provided the products are used in accordance with the manufacturer’s instructions. Products on this list are subject to additional Job Control testing during construction or installation.

The following producer(s) and plants of lime have been authorized by the Transportation Laboratory for use when specifications allow or require the use of lime for soil stabilization or aggregate lime treatment in HMA. Refer to section 24-2 and Section 39-2 of the 2015 Standard Specifications and to the Project’s Special Provisions for further requirements.

Manufacturer Product Description Expiration DateBABA Act Information*
Graymont Western U.S., Incorporated - Cricket Mountain Plant - Delta, UT High Calcium Quicklime 12/2028Manufactured product, domestic source reported
Graymont Western U.S., Incorporated - Pilot Peak Plant - Pilot Peak, NV High Calcium Quicklime Expired on 4/2026Manufactured product, domestic source reported
Graymont Western U.S., Incorporated - Pilot Peak Plant - Pilot Peak, NV Hydrated Lime Expired on 4/2026Manufactured product, domestic source reported
Lhoist North America - Apex Plant - Las Vegas, NV Quicklime Hydrated Lime 8/2028Unconfirmed
Lhoist North America - City Of Industry - City Of Industry, CA Hydrated Lime 8/2028Unconfirmed
Lhoist North America - Nelson Plant - Peach Springs, AZ Quicklime Hydrated Lime 8/2028Unconfirmed
Lhoist North America - Riverside - Riverside, CA Hydrated Lime 8/2028Unconfirmed
Lhoist North America - Stockton - Stockton, CA Hydrated Lime 8/2028Unconfirmed

Disclaimer: Caltrans assumes no liability or responsibility for the accuracy or validity of the information contained in the tables above if used by any outside entities.

Notes:

  1. Approval issued by Caltrans to qualified producers of lime authorizes them to supply lime to Caltrans projects using a Certificate of Compliance.
  2. The information contained herein, shall not be used for advertising purposes, nor is it an endorsement by Caltrans.
  3. Instructions on how a producer and plant are placed on the Authorized Material List can be found in the Authorization Criteria for Producers of Lime for Use in Soil Stabilization and Aggregate Lime Treatment in HMA.

Materials on the AML will require reauthorization five (5) years after the date they are added to the AML.

Caltrans contact: Richard Wilmshurst, (916) 639-4306, richard.wilmshurst@dot.ca.gov

*As attested to by the supplier as of April 14, 2026 per definition in 2 CFR 184 and 23 CFR 635.410. Stakeholders should use this information in conjunction with corresponding Caltrans special provision section 6-1.04 to understand applicable requirement for the project.

The California Department of Transportation (Caltrans) is implementing statutory changes required by the Bipartisan Infrastructure Law -Build America, Buy America Act (BABA), as outlined in 2 CFR 184 and 23 CFR 635.410.

https://www.fhwa.dot.gov/construction/cqit/buyam.cfm