A floating, self-propelling, self-ballasting, pivotable bridge system is described. The bridge has a main bridge body with a pontoon-like structure. One end of the bridge has a pivoting system comprising complementary pivot plates, one attached to the bridge and the other on land with a pivot pin attaching them at a pivot point. The other end of the bridge has a releasable locking mechanism. The bridge has ballast tanks for raising and lowering its level in the water. The bridge also has thrusters for propelling itself through the water when it pivots from a closed position spanning a waterway to an open position allowing boat traffic through a waterway.