Should construction operations reveal or expose a waterline
main or service running approximately parallel and less than 10 feet
horizontally from the proposed Sewer installation and where it is
not practicable to relocate the Sewer, the following methods of protection
must be employed:
A. If five feet of horizontal separation cannot be achieved, the Sewer
shall be encased in concrete, as shown on these drawings; or else,
ductile iron pipe of the same size shall be utilized. Appropriate
manufactured fittings shall be employed to adapt the iron pipe to
the contract Sewer pipe.
B. Whenever the waterline crosses over the new Sewer with less than
18 inches of separation, the Sewer pipe for a distance of nine feet
on each side of the waterline shall be class 52 ductile iron pipe.
Appropriate manufactured fittings shall be employed to adapt the iron
pipe to the contract Sewer pipe. As an alternative, the waterline
"may" be raised, if feasible, to achieve the required separation.
C. Should the waterline in either situation be at or below the sewer
elevation, the waterline or the Sewer must be relocated to achieve
ten-foot horizontal separation or eighteen-inch vertical separation.