Visitors to Tilden Regional Park may find some popular attractions closed as work begins on a major sewer project in the Tilden Nature Area.

The construction, scheduled to start in October and finish next February, is intended to improve safety and efficiency in the maintenance and operation of the Tilden Nature Area.

The work will include removal of existing holding tanks and installation of gravity sewers and manholes and other infrastructure, including a 9,000-gallon holding tank near the foot of Canon Drive.

The Tilden Little Farm; Indian Camp parking lot, picnic areas, play structure, and restroom; and Big Leaf picnic area and restroom will be closed to the public during construction. Some trails will also be closed or have alternative access.

"The Environmental Education Center is expected to remain open to walk-in visitors Tuesdays through Sundays, 10 a.m. to 4:30 p.m., and interpretive programs will continue during this period," the park district said in a news release.

The sewer project is budgeted at almost $1 million, covered from the the district's general fund and money from Measure CC and Measure WW.