paddlebox

n.1.a wooden covering for the upper part of the paddle wheel of a steam vessel.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
While this was happening most of the passengers still on board moved over to the port side to see what was happening and this caused the ship to list until the paddlebox platform where the people disembark from was awash.