SELSET RESERVOIR: DESIGN AND CONSTRUCTION.

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Abstract
This Paper refers briefly to the hydrological features of the upland sources of the Tees Valley and Cleveland Water Board, and deals in some detail with certain aspects of the design and construction of the Selset Dam. The geology and cut-off trench are touched upon and the Authors deal with the study of the foundation and refer to the subsequent settlement observations. The principal parts of the Paper deal with the construction of over 4,000 vertical sand drains for increasing the strength of the soft clay underlying the seat of the embankment, and the problems associated with the construction of an embankment 128 ft high of boulder clay, with speciraelf erence to the dissipation of porewater pressure and the effect of rainfall and temperature on the rate of progress achieved. The presence of a slipped area on the south side of the dam adjacent to the embankment necessitated the carrying out of special protective measures, which are described, and the overflow works and control of the water are dealt with shortly. Construction commenced in June 1955 and the reservoir first filled in July 1960. The cost of the dam was £3,200,000.

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