Road damage from storms that have slammed Marin since January will cost $8.7 million to repair 24 sites, according to a county report to the Board of Supervisors on Tuesday. “It seems like a storm hit every weekend,” said Raul Rojas, head of the Department of Public Works. Projects include an estimated $980,000 to repair Lucas Valley Road just off Nicasio Valley Road and $800,000 to repair White Hill, where slides closed traffic four times…