Where: Starting at Heritage Park and continuing around the perimeter of Capitol Lake along Deschutes Parkway Southwest to just past the Olympic Street West intersection.

What's happening: As part of the Deschutes Estuary Restoration Project, DES will be conducting a geotechnical survey of the land around Capitol Lake that will require drilling into the ground to collect samples.

Impact: Large machinery, trucks, and crews will be visible, and visitors can expect loud noise from the drilling. A portion of the pedestrian walking path will be closed, and pedestrians should follow the marked detour.

A few parking spots near the drilling locations will be temporarily closed during the work.

When: 7 a.m. to 5 p.m., Monday, Dec. 18 to Friday, Dec. 22.

All work is weather dependent. The Washington State Department of Enterprise Services has contracted with FLOYD | SNIDER of Seattle, Washington for this effort.