(A) Horizontal separation. Wherever possible, a water service should be laid at least ten feet horizontally from any storm or sanitary sewer. Should conditions exist to prevent the ten feet separation, the water service may be laid closer to the storm or sanitary sewer provided that the water service is at least 18 inches above the crown of the sewer, and is either in a separate trench or in the same trench on an undisturbed earth shelf. If it is impossible to obtain the ten feet separation or the 18 inch vertical separation, the sewer must be constructed of either slip-on or mechanical joint ductile iron pipe or PVC SDR-26 pipe with pressure joints, meeting water main standards and tested to assure water tightness before backfilling.
(B) Vertical separation. Whenever a water service must cross storm or sanitary sewers, the water service shall be laid at such an elevation that the water service is 18 inches above the crown of the sewer. This vertical separation must be maintained for that portion of the water service located within ten feet horizontally of any sewer crossed. This must be measured as the normal distance from the water service to the sewer. If it is impossible to obtain the proper vertical separation as described above or if it is necessary for the water service to pass under a sewer, the sewer must be constructed of slip-on or mechanical joint ductile iron pipe or PVC SDR-26 pipe with pressure joints, meeting water main standards, and must extend on each side of the crossing until the normal distance from the water service to the sewer is at least ten feet. Where the water service must cross under a sewer, a vertical separation of 18 inches between the invert of the sewer and the crown of the water service shall be maintained, along with means to support the sewer to prevent its settling and breaking the water service.
(Ord. 2014-23, passed 6-16-14)