Officials say the extent of damage to a Beaver County dam hit by a tow boat won’t be known until the spring. The boat ran into a gate at the Montgomery Lock and Dam on the Ohio River near Shippingport on Dec. 13, closing the large lock chamber. A secondary lock was closed for repairs, shutting down river traffic. Spokeswoman Carol Davis tells the Pittsburgh Tribune-Review the U.S. Army Corps of Engineers expects to pull the gate from the river in the spring, which will reveal the extent of the damage. Authorities are still investigating what caused the crash.