Bituminous concrete facings are frequently used as water barriers on the upstream face of pervious embankment dams, as an alternative to concrete slabs, shotcrete membranes, metallic sheets, geomembranes, carth and soil cement blankets. The bituminous concrete facing acts in lieu of an carthen fine grained core or other type of water barriers in the interior of the dam. The bituminous facing also protects the upstream face of the dam against damage by waves, wind, rainfall and vandalism. Practice and trends in the design and construction of bituminous concrete upstream facings for embankment dams are critically reviewed and evaluated in this Bulletin for the purpose of providing cssential information for future developments. The Bulletin covers the state-of-the-art of current practice. This includes a review of the main elements of a facing system, a presentation of records from the practice, a description of materials used in composite facings, typical designs of a facing system, details at the interface with other elements of the dam, joints, some construction details, recommendations on testing, performance records, and repair techniques. The Bulletin does not cover special cases.

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