Section 105.94. Spillways

(a) Every dam must be provided with a spillway system which is capable of safely conveying the design flood, as provided in § 105.98 (relating to design flood criteria), of the dam without endangering the safety or integrity of the dam. The Department may require submission of models utilizing current acceptable methodologies to demonstrate this capability without excessive erosion and failure of the spillway system.

(b) Each spillway must include a satisfactory means of dissipating the energy flow at its outlet to assure conveyance of flow without endangering the safety and integrity of the dam or the natural environment of the stream.

(c) Each spillway floor slab must be provided with adequate drainage, anchors, or drainage and anchors to be stable against uplift.

The provisions of this § 105.94 adopted September 10, 1971, effective September 11, 1971, 1 Pa.B. 1804; reserved August 11, 1978, effective August 28, 1978, 8 Pa.B. 2229; added September 26, 1980, effective September 27, 1980, 10 Pa.B. 3843; amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 219. Immediately preceding text appears at serial pages (207720) to (207721).

Notation

Authority

The provisions of this § 105.94 amended under section 5 of the Dam Safety and Encroachments Act (32 P. S. § 693.5).