. >>> if you live in kingsville you've probably driven across the covered jericho bridge. it's getting a makeover next year. we have a report on the historical structure which is maintained jointly by baltimore and howard counties. >> when they start for whatever reason, you get a pretty good bump. >> it's the sound of wear and tear which sits above the gun powder river. >> the bridge was originally made in 1865 and had its last major renovation in 1982. it is in dire need of tender loving care. it's going to start this fall and next year. >> i believe that's one reason they're doing this. the boards on the deck have started to wear and loosen. there are six covered bridges. >> reporter: underneath and around the bridge sits the gun powder trail, almost 14 1/2 miles long of some of the most picturesque trail unless maryland. >> for horse traffic, for bikes, for hikers and also for the motor traffic which is continuing to expand because of the most recent back at aberdeen proving ground. >> we are restoring and interpreting jerusalem mail village. it's one of our best adver