Districts Impacted Central Counties Impacted Camden Completed Cost: The total construction cost is approximately $3 million. Why was this work necessary? The existing bridges were built in 1932 and are 20 feet wide. The new bridges are 26 feet wide. project displays Route J Welcome Letter Route J FAQs Route J Rainwater Display Route J Niangua River Display Route J Detours Route J Bridges Strip Map Route J Comment Form