Derek Dimitri, manager of Reno Mountain Sports on Moana Lane, has seen retail activity in the area decline over the years as business after business departed the Sierra Marketplace Shopping Center, the high-profile property at Moana Lane and South Virginia Street.And retailing in the area has been even further curtailed this summer with the heavy construction going on up and down Moana Lane as general contractor Q&D Construction works through the long-awaited widening of the Moana corridor. But Dimitri and other retailers on Moana Lane hopes that the project revitalizes businesses along the Moana corridor when the $36 million project …