MEXICO CITY, Sept 24 (Reuters) - U.S. construction firm

Vulcan Materials ( VMC ) said on Tuesday it planned to defend

itself using all available legal avenues after Mexico turned

land that contains a company-run quarry and port on the Riviera

Maya into a nature reserve.

Vulcan called the move a "new violation" of Mexico's

commitments to regional trade agreements, including the USMCA

trade pact, and said it will have a chilling and long-term

effect on U.S.-Mexico trade and investment relations.