Extensive repairs to an old timber beam bridge that carries King County’s Snoqualmie Valley Trail over Griffin Creek will require a month-long closure beginning in mid-January.

Significant repairs have already been completed to the bridge, which is located in the Snoqualmie Valley between Carnation and Snoqualmie, including replacing old wooden timbers that were rotted.

A county work crew will install additional new wooden timbers that support the bridge structure beginning Monday, Jan. 14. The repairs are expected to take approximately one month.

During the upcoming closure, the trail will be closed to all access from the 11th Street Northeast access point south to the southern end of the bridge abutment at Northeast 8th Street.

At more than 31 miles in length, the Snoqualmie Valley Trail is the longest trail in King County’s 175-mile regional trail system. The trail winds through the largely rural Snoqualmie River Valley, passing working farms and forests, as well as the cities of Duvall, Carnation, Snoqualmie and North Bend.

The trail connects with the cross-state John Wayne Pioneer Trail at its southern end and offers access to such notable destinations as Tolt-MacDonald Park, Meadowbrook Farm and the Three Forks Natural Area.