The draw span was a twin - leaf rolling bascule system with fixed counterweights and was powered by an electromechanical drive .
Vasilyev designed a new five span metal bridge including a central draw span to accommodate increased traffic and load weights .
The draw span was a draw span     rolling bascule system with fixed counterweights and was powered by an electromechanical drive .
Vasilyev designed a new five span metal bridge including a central draw span to accommodate increased traffic and load weights .