GORHAM, N.H. — A half-mile of the Tuckerman Ravine Trial used to access Mount Washington will be closed and rerouted for bridge construction starting Sept. 6.

White Mountain National Forest officials say the existing bridge suffered significant damage during Tropical Storm Irene in 2011 and needs to be replaced.

During construction, the trail will be rerouted via sections of the Huntington Ravine trail and Raymond Path.

Forest officials say Tropical Storm Irene caused an estimated $10 million in damage to the White Mountain National Forest. Several other bridges on the Tuckerman Ravine Trail were damaged and will be replaced as funding allows.

The bridges are not only important to hikers, they also are used by Forest Service Snow Rangers to shuttle personnel and supplies to Hermit Lake in the winter and spring. The access is critical to the avalanche forecasts produced by the Snow Rangers and the search and rescues they manage.

The National Forest Foundation, which was created by Congress as the official nonprofit partner of the USDA Forest Service, has partnered with the Forest Service to help address this work.