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GENERAL PROVISIONS GOVERNING INSTALLATION OF SUBSURFACE STRUCTURES AND PIPELINES WITIUN COUNTY ROAD RIGHTS-OF-WAY PUBLIC CONVENIENCE AND SAFETY: A. Before obstructing any private driveway entrance or County road traveled way with a trench, spoil bank, equipment or other barrier permitted for any prolonged period of time, the Permittee shall notify the !mown users of the respective thoroughfare(s) involved, and shall provide access for vehicular and pedestrian traffic to and from the road. I. Unless otherwise permitted, all work shall be conducted in such a manner that no less than one lane of the existing County road traveled way will be maintained open to public traffic during working hours in a smooth and safe riding condition(s). Two lanes shall be open after working hours. 2. ln cases where road closure is permitted, the permission to close the road will be granted under the condition that the Pennittee notify tbe following persons and/or agencies of the time, the period of closure, and the detour route at least twenty-four (24) hours prior to said road closure. a. The County of San Joaquin Public Works Department d. The local fire district b. The County of San Joaquin Sheriffs Office e. The local school district c. The local postal service f. The local residents involved B. Should hazardous conditions relative to the installation operations warrant flagmen, as many capable flagmen as may be necessary shall be provided by the Permittee and stationed in advance of work to warn and direct traffic. C. Lights, signs and barricades shall be furnished, erected and maintained by the Pennittee for the adequate warning and convenience of the public, with particular attention to be taken in this regard after dark. D. Any excess dirt and/or debris which might be a hazard to either automobile or pedestrian traffic, uncontrollable by lights, signs and barricades, shall be removed from the jobsite daily. STRUCTURES: A. Walls of structures shall be such quality and strength that they will resist all pressures and will not crack or be deformed in such a way as to create a hazard or maintenance problem at any time. Therefore, the minimum structural requirements for concrete pipe placed under county road rights-of-way shall conform to the following American Association of State Highway and transportation Officials (AASHTOJ designations. I. For concrete pipe up to and including thirty-three inches (33") inside diameter, extra strength concrete conforming to AASJ-ITO Designation M 170M. 2. For concrete pipe thirty-six inches (36") inside diameter and larger, reinforced concrete pipe conforming to A.ASHTO Designation M 170M Class III 3. Plastic pipe conforming to AASI-ITO Designation M294. B. All concrete pipe joints with County road rights-of-way shall be sealed against leakage and/or infiltration with rubber gasket in conformance with Section 65-1 :06 of the California Standard Specifications, or with other methods as may be permitted under the Special Provisions. C. Cast-in-place concrete pipe, vitrified clay pipe, spiral welded steel pipe, or corrugated aluminum alloy pipe shall not be installed within the County road rights-of-way unless specifically so stated in the Special Provisions, and only under the conditions as provided. D. All structures to be buried within the County rights-of-way shall be set at such elevations as to allow minimum coverage of thirty inches (30") to the centerline of the roadways and twelve inches (12") at the bottoms of borrow ditches each side of the roadways. The depths of structures shall be established below a flat plane extending across the rights-ot:way, no part of which shall extend above the elevations stated above; manholes, lampholes, valves, etc. not included. Future surface elevations shall be anticipated as nearly as possible and structure elevations shall be established for future adjustments accordingly. E. The County hereby reserves the right to specify in the Special Provisions the gage and surface treatment of any galvauized conugated metal pipe that is to be installed. F. All longitudinal utility facilities are to be established (and dimensioned on sketches) from surveyed centerline of road right-of-way, not from right-of-way (border) lines. REPAIRS OF THE COUNTY RIGHT-OF-WAY: A. All excavations shall be backfilled and compacted immediately after work therein has been completed. 8. Trenched shall not be left open farther than 300 feet in advance of pipe laying operations, or 200 feet to the rear thereof, unless otherwise permitted by the Engineer. C. Unless otherwise permitted under the Special Provisions, backfill shall be placed and mechanically compacted in such a manner that the relative compaction throughout the entire fill within the County road right-of-way shall conform to the percentages of compaction as shown on the Trench detail. D. Backfill material shall be placed in horizontal uniform layers not to exceed in thickness, before compaction, 0.67 foot in the bedding region, one -foot where 90% compaction is required, and two-feet where 80% compaction is required. E. No portion of the excavation(s) shall be compacted by ponding or jetting unless a maintenance bond is provided. F. Gravel backfill material shall be utilized only where specifically so stated on the face of the permit. It shall be compacted by means of a high-frequency internal vibrator, the compactor to be a size and type approved by the Engineer. Points of compaction shall not be greater than 18" centers and to the full depth of the lift. G. All pavements, curbs, gutters, sidewalks, borrow ditches, pipes, head walls, road signs, trees, shrubbe1y, and/or other permanent road facilities impaired by or as a result of construction operations at the construction site(s) occupied by materials and/or equipment, shall be restored immediately upon backfilling of the excavation to the original grades and cross sections, and to a condition as good as, or better than existing prior to construction. H. All surtacing materials of roadways and driveway approaches cut or damaged by or as a result of construction operations, shall be replaced within ONE WEEK following the backfilling of excavation, weather permitting, with compacted layers of smiacing materials at least as thick as the existing, and no less than two inches (2") of asphalt concrete over six inches (6") of aggregate base, both as specified below. I. Asphalt Concrete: Combined mineral aggregate shall conform to the quality and gradation requirements for Type "A" one-half inch( l /2) maximum aggregate, coarse or medium gradation as specified in Section 39 of the California Standard Specifications. The bituminous binder to be mixed with mineral aggregate shall be paving asphalt having (Grade PG 64-10), unless otherwise directed by the Engineer. Placement of asphalt concrete surfacing shall conform to the applicable provisions of Section 39 of the California Standard Specifications. 2. Aggregate Base: Combined mineral aggregates shall conform to the quality and the grading for three-quarter inch (3/4") maximum size aggregate Class 2 Aggregate Base specified in Section 26 of the California Standard Specifications. I. Before acceptance of repairs to the Cow1ty road rights-ot:way, all unsightly and detrimental dirt, dust and/or debris shall be removed and the construction areas left in a neat and presentable condition(s). I. If necessaiy, County road traveled way and driveway pavements shall be washed with water to remove dirt and dust. 2. Driveway approaches and field entrance pavements damaged by equipment or spoil banks shall be repaired as directed by the Engineer. J. Upon request by the County, any settlement, sagging of su1face, or cracking of pavement shall be repaired immediately by and at the sole expense of the Permittee for a period of one year following acceptance oftbe work. 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