A mobile and compact simulated-wave water ride attraction is provided having one or more sluice slide-over covers for ensuring the safety of riders in the absence of an extended transition surface or using a shortened transition surface. Advantageously, the ride attraction comprises a plurality of transportable modules and other associated components that can be shipped between sites using trucks, trains or other transportation means. The slide-over sluice cover advantageously enables riders to safely slide over the sluice gate and/or injection nozzle without risk of injury or interference with ride operation. The sluice cover comprises a contoured flexible pad which covers and extends over the top surface of the sluice gate. A flexible tongue is provided which is urged downward squeezing against the flow and sealing the nozzle area off from possible injurious contact from a rider. The shape of the tongue also provides a short transition surface over the top of which a rider can slide without injury. A padded fixed decking is provided and in conjunction with the sluice cover it allows the rider to perform a variety of new and exciting skimming/surfing tricks and maneuvers.