(a) Ashokan reservoir shall mean the reservoir known as the Ashokan reservoir, located in the Towns of Olive, Marbletown and Hurley, Ulster County.

(b) City shall mean the City of New York.

(c) City reservoir releases manager shall mean an employee of the city formally designated by the mayor of the city to fulfill the responsibilities of the city reservoir releases manager set forth in this Part, which designation shall be on file in the office of the department reservoir releases manager. In lieu of such designation, the city reservoir releases manager shall be the administrator of the city environmental protection administration.

(d) Close the Shandaken tunnel shall mean the action of closing a gate or gates located at the Schoharie reservoir to stop or decrease the flow of water from the reservoir into the Shandaken tunnel.

(e) Commissioner shall mean the Commissioner of Environmental Conservation.

(f) Department shall mean the Department of Environmental Conservation.

(g) Department reservoir releases manager shall mean the commissioner or an employee of the department formally designated by the commissioner to fulfill the responsibilities of the department reservoir releases manager set forth in this Part, which designation shall be on file in the office of the city reservoir releases manager.

(h) Diversion shall mean the withdrawal of water from the Schoharie reservoir into the Shandaken tunnel.

(i) Esopus Creek shall mean that portion of a creek known as Esopus Creek which runs from the Shandaken gaging station to the Ashokan reservoir.

(j) Open the Shandaken tunnel shall mean the action of opening a gate or gates located at the Schoharie reservoir to commence or increase the flow of water from the reservoir into the Shandaken tunnel.

(k) Schoharie reservoir shall mean that reservoir known as the Schoharie reservoir, located in the Towns of Conesville and Gilboa, Schoharie County; the Town of Prattsville, Greene County; and the Town of Roxbury, Delaware County.

(l) Shandaken gaging station shall mean the United States Geological Survey (USGS) stream gaging station No. 01362198, located on Esopus Creek at Shandaken, New York, as identified in Water Resources Data for New York, Water Year 1975, U.S. Geological Survey water data report NY-75-1 (see section 672.6 of this Title).

(m) Shandaken tunnel shall mean the tunnel known as the Shandaken tunnel running beneath ground from the Schoharie reservoir to Esopus Creek at Allaben, New York.

(n) Spill or spilling shall mean the flow of water over the spillway of a dam which contains a reservoir or reservoirs.