MARENGO – The Marengo zoning commission Thursday approved at least one zoning change that clears the way for a sand and gravel miner to enter city limits, amid questions from city residents and Riley Township officials.

The commission presided over four public hearings, multiple zoning requests and one amendment to the city’s zoning code, as the city attempts to annex land southwest along Route 23 through Riley to entice the Illinois Tollway Authority to develop an interchange at Interstate 90.

Zoning Vice Chairman Chester Mazurkiewicz warned the City Council to weigh public concern on the expansion effort carefully before casting final votes Monday.