The Sig Sauer Academy is planning to build a covering over sand berms for its shooting ranges located near Route 101 in New Hampshire after a state police investigation showed that bullets were landing on the nearby highway.

The Union Leader reported the town of Brentwood has approved a permit for the building project, and Brentwood Building Inspector Kip Kaiser said the company has already gotten started on building the protective structures.

Five of the eight shooting ranges in the area will receive the coverings. While the academy is located in both Brentwood and Epping, only the ranges on the Brentwood side were determined to need extra safety measures.

Sig Sauer announced plans to build the safety structures in a June statement after the New Hampshire State Police unveiled findings of an investigation that started in April when a woman’s windshield was struck by a bullet on Route 101 near the academy.