Culvert

12″ diameter by 10′ long 12″ diameter by 20′ long 12″ diameter by 24′ long 12″ diameter by 30′ long 15″ diameter by 10′ long

12″ 15″ 18″

12″ 15″ 18″ 21″ 24″ 30″ 36″ 42″ 48″