One of Lake Tahoe’s most popular state parks will reopen next spring after being closed for three years for repairs. D.L. Bliss State Park, on the lake’s southwest shoreline near Emerald Bay, will reopen on May 21, state park officials announced this week. … It was originally planned to cost $2.8 million and take one summer to complete. But the Southern California contractor who was awarded the low bid encountered difficulties installing 3 miles of water lines. Workers dug a six-foot deep trench across the park, but ran behind schedule, encountering strict rules from the Tahoe Regional Planning Agency that prohibit grading or digging after Oct. 15 each year to prevent winter rains from washing silt and dirt into the lake and threatening its famed bright blue clarity.