spillway apron

spillway apron

[′spil‚wā ‚ā·prən]
(civil engineering)
A concrete or timber floor at the bottom of a spillway to prevent soil erosion from heavy or turbulent flow.
References in periodicals archive ?
Rocky Reach spillway apron underwater concrete repair, Chelan County Public Utility District; apparent low bidder was Ballard Marine Construction.
USACE engineers needed the 511th to determine if backwash and debris were eroding the spillway apron on the down-river side of the John Day Dam, so they spent 2 days recording footage and taking measurements to provide USACE personnel the information needed for future improvements.