Here’s the NPS official press release about the opening of the roads into Yosemite.
NPS: “Yosemite Valley Re-Opens Roads
Roads in Yosemite Valley were re-opened at approximately 6:30 AM on May 17, 2005. Initial assessments indicate that roadways were not damaged during yesterday’s high water.
Campsites are currently being assessed for damage; those which have not sustained any damage should open by noon today. It is possible that some campsites in the North Pines Campground have sustained damage, and Yosemite National Park officials recommend that campers with reservations in North Pines call for information before coming to the park.
Additionally, some units in Housekeeping Camp have been damaged; those which have not will be open by noon today. Visitors with reservations in Housekeeping Camp should call Delaware North Company, Inc., at 559/252-4848 for information about their reservation. All other lodging and camping facilities in Yosemite Valley are open with no restrictions.
High water levels peaked at about 11 feet, 6 inches in Yosemite Valley at about 5:00 PM. Water was crossing both Southside Drive and Northside Drive in places from multiple sources including Bridalveil Creek, Ribbon Creek, and the Merced River.
Flooding is a natural process in Yosemite National Park. High snow levels this winter, combined with unsettled spring weather patterns, indicate that flooding may occur. Visitors are advised to check the web site www.nps.gov/yose , or call 209/372-0200 for current weather conditions”