ROCKFORD, Ill. (AP) — Cleanup of polluted soil at the Rockford Public Library could cause major disruptions in coming years, and has halted plans to lease space to a local college.

The Rockford Register Star reports (http://tinyurl.com/l24k6dm ) that the library abandoned a plan to lease space in its main branch to Rock Valley College.

Soil at the site was contaminated by coal tar from a former manufactured gas plant, which ComEd bought in 1966. The utility is expected to begin the roughly year-long cleanup in 2015.

Library officials say removing contaminated soil beneath and around the building could require the closure of portions of the building.

They say the main branch might be able to stay open during cleanup. But they also might have to temporarily vacate the building for a year or more.