§ 15.01.660. Sewer lateral connections.

Existing service laterals shall be constructed with materials compatible with the existing laterals with appropriate connections for joining the ends of existing laterals.

New service laterals shall be constructed with materials and procedures as specified herein. Sewer service laterals installed to lots shall be located ten feet downhill from the center of the lot. Sewer service laterals shall extend from the sewer main to a point ten feet beyond the street right-of-way unless designed or staked otherwise. The contractor is required to install a clearly marked indicator at the end of each lateral line. This indicator may be a two × four or a one-inch PVC pipe extended vertically above finish ground clearly visible upon site inspection. In addition to the marker, the developer/contractor shall identify the location (distance) of the lateral connection to the main from the nearest downstream manhole. Laterals shall be capped with a cap suitable to withstand test pressure and prevent any leakage into or out of the lateral. Minimum slope shall be one-quarter-inch per foot.

Minimum size for a sewer lateral pipe shall be four inches in diameter and a maximum of six inches in diameter. Pipe used for new service laterals shall be PVC plastic pipe conforming to ASTM D3034 SDR 35.

All connections shall be "insert-a-tee" or WYE at ten o'clock or two o'clock positioning to center of main line and shall be encased in concrete after inspection of connection is made.

Connection shall conform to City of American Fork standard drawing. Any deviation from this drawing must be approved in writing by the city engineer.

1.

Pipe bedding. Sewer lines shall be well bedded on a solid foundation throughout the length of the barrel. An excavation shall be made for the coupling. The pipe shall not rest directly on a rock or other hard surface. Where the pipe is laid in rocks, other coarse grained soil or clay, the trench shall be over excavated and the pipe laid on a four-inch bed of compacted fill with rocks not exceeding one-half-inch in diameter.

Selected material that is free from rocks, frozen lumps, and other objectionable material larger than one-half-inch shall initially be placed along each side of the pipe not higher than the centerline. This material shall then be tamped under the pipe-curbed railroad so that no voids are left. Additional selected material shall then be placed in approximately four-inch layers, with each layer being tamped until the pipe is covered by at least twelve inches of compacted materials.

2.

Backfill. The backfill of the trench from a point two feet behind, the sidewalk line, and running out to the street, shall be placed in horizontal twelve-inch maximum layers and compacted to ninety-five percent of the maximum laboratory density as determined by ASTM D1557 with mechanical tampers. All surface restoration shall conform to Division 6.

3.

Construction proceedings. If a period of time is to lapse between backfilling a trench and restoring the surface, the granular base course shall be placed flush with the existing surface and maintained until new surface treatment is placed. The granular base course shall meet the compacted density specified in Division 14 of this chapter immediately prior to the placement of asphalt. The city may either test the compacted fill or require the contractor to have it tested for proper density. Any trench that does not meet proper density shall be reexcavated and recompacted according to these specifications. The final asphalt surface shall absolutely not dip below the existing asphalt surface line. The contractor shall be responsible for any trench failures for two years after the date of trench restoration.

4.

Cover over sewer lateral lines. There shall be a minimum of three feet of cover over all sewer lateral lines (three-foot six-inch minimum at property line).

5.

Sewer clean-outs. There shall be a maximum distance of five feet from the foundation wall to the first exterior clean-out with a maximum distance between clean-outs of seventy-five feet. There shall also be a clean-out at any ninety-degree bend or any combination of bends in excess of ninety degrees. Clean-out, standpipe can be cast iron or PVC with cast iron cap or brass cap. All clean-outs shall remain visible and accessible.

(Ord. No. 2007-07-31, §§ 7.3—7.3.5, 7-10-2007; Ord. No. 2010-11-24, § 2, 11-23-2010)