Work is slated to begin in September on a long-awaited effort to replace the 55-year-old Clarks Bridge on Ga. 284/Clarks Bridge Road at Lake Lanier. Plans call for Snellville firm E.R. Snell Contractor to use a barge in the $8.7 million project, which initially will involve building the new structure next to the current one. The project had been set to begin last fall and then in the spring, but it got caught up in a lengthy permitting process with the U.S. Army Corps of Engineers, one that ended up costing an additional $50,000.