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a. General.

1) Water lines shall generally be parallel to the right-of-way or easement wherein they lie.

2) Unless otherwise required by the City Engineer, water lines shall generally be located on the south and west sides of the right-of-way wherein they lie.

b. Location in Relation to Sanitary Sewer Lines and Other Utilities.

1) Under most circumstances, water mainlines shall be separated from sewer mainlines by a minimum of 10 feet. In no case shall the separation be less than five (5) feet or as required by OAR 333-061.

2) Water mainlines shall be separated from all other utilities by a minimum of five (5) feet.

3) Sanitary Sewer Main Crossings.

a) Where a water mainline crosses below or within 18-inches vertical separation above a sanitary sewer main or lateral, one full length of CL 50 DI pipe shall be centered at point of crossing with ductile pipe.

c. Location in Right-of-Ways.

1) Unless otherwise approved by the City Engineer, water mainlines shall be located in the street right-of-way along alignments shown in the standard details.

2) The distance between the mainline and the curb shall vary as little as possible. On curved streets, mains may be laid on a curve concentric with the street centerline with deflections no greater than the manufacturer's specifications, or mains may be laid in straight lines along the tangent between selected angle points to avoid conflicts with other utilities. The angle point and tangent section shall not be closer than five (5) feet from the right-of-way line, nor more than three (3) feet in front of the curb face.

d. Location in Easements.

1) Unless otherwise specified or authorized by the City, minimum easements widths for water mainlines (as well as water service lines or meters located on private property) shall be fifteen (15) feet for normal depth lines.

2) Water mainlines with inside diameters larger than 12-inches will require wider easements (20' minimum).

3) Mainlines in easements will be allowed only in cases where it is required in order to loop a mainline to avoid a permanent dead end condition, and only after all reasonable attempts to loop the mainlines in a right-of-way have been exhausted.

4) When water mainlines in easements are approved by the City, the easement shall be centered on the mainline, and the mainline shall be offset a minimum of 6 feet from any property line.

5) The conditions of the easement shall be such that the easement shall not be used for any purpose which would interfere with the unrestricted use for water mainline purposes. Under no circumstances shall a building or structure, trees or ornamental landscaping be placed over a water mainline or easement, nor shall any parallel fences be constructed within the easement (access gates acceptable to the City shall be installed in fences which the City allows to be constructed across City easements). Prohibited structures shall include decks, as well as footings or overhanging portions of structures located outside the easement.

6) Easement locations for public water mainlines serving a PUD, apartment complex or commercial/industrial development shall be in parking lots, private drives or similar open areas which will permit an unobstructed vehicle access for maintenance by City forces.

7) Common placement in the easement of water and sewer or storm drain line may be allowed under certain conditions subject to approval by the City Engineer. Easements wider than the minimum will be required. Franchise utilities shall not be placed in City utility easements.

8) Common easements will be reviewed on a case-by-case basis. Separation of utilities must meet requirements of relevant environmental authorities.

9) All easements must be furnished to the City for review and approval prior to recording.

e. Phased Construction.

1) Water mains installed by phased construction, which will be extended in the future, shall terminate with a mainline valve, blow off and permanent thrust restraint system which allows the mainline valve to be connected to without taking the line out of service.

2) All developments will be required to extend mains across existing or proposed streets for future extensions by the City or other developments. All terminations shall be planned and located such that new or existing pavement will not have to be cut in the future when the main is extended.

3) The construction plans for each phase shall be capable of standing alone, including provisions for looping and minimum fire flows.

f. Location in Relation to Ditches and Drainage Channels.

1) Surface water crossings of mains shall be in accordance with OAR 333-061 and the requirements outlined herein.

2) Mains crossing ditches or drainage channels shall be designed to cross as nearly perpendicular to the channel as possible.

3) The following surface water crossings will be treated on a case-by-case basis:

a) Ditch or drainage channel crossing for pipes of 12-inch diameter and greater.

b) River or creek crossings requiring special approval from the Division of State Lands.

4) The minimum cover from the bottom of the ditch or drainage channel to the top of pipe shall be a minimum of thirty-six (36) inches in accordance with Oregon Health Authority-Drinking Water Services.

5) A scour pad centered on the water line will be required for mains where the potential for erosion exists as determined by the City Engineer. The size and design of scour pads will be reviewed on a case-by-case basis by the City Engineer.