A bridge bearing pad assembly to be positioned between a bridge member and a bridge support. The bearing pad assembly comprises a slide plate assembly and a bearing pad. The bearing pad includes a main body portion at least one inch thick of an elastomer having a durometer of from about 40 to 65. An intermediate layer of an elastomer of from about 1/16 to 1/4 inch and having a durometer of from about 80 to 100 overlies the main body portion. Stiffening shims are embedded in the main body portion and one lies at its upper surface and directly below the intermediate. A thin layer of Teflon overlies the intermediate layer. All of the layers are preferably vulcanized to each other. The slide plate assembly provides a stainless steel slide plate larger than the confronting bearing pad slide surface to slide against the Teflon and to cover it throughout the entire design range of relative movement.