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GENERAL PROVISIONS GOVERNING INSTALLATION OF SUBSURFACE STRUCTURES AND PIPELINES WITHIN COUNTY ROAD RIGHTS-OF-WAY PUBLIC CONVENIENCE AND SAFETY: A. Before obstrncting any private driveway entrance or County road traveled way with a trench, spoil banlc, equiprnent or other barrier pennitted for any prolonged period of tirne, the Permittee shall notify the known users of the respective thoroughfare(s) involved, and shall provide access for vehicular and pedestrian traffic to and from the road. I. Unless otherwise perrnitted, all work shall be conducted in such a manner that no Jess than one Jane of the existing County road traveled way will be maintained open to public traffic dmi.ng worki11g hours in a smooth and safe riding condition(s). Two lanes shall be open after working hours. 2. In cases where road closure is permitted, the permission to close the road will be granted under the condition that the Pennittee notify the following persons and/or agencies of the time, the period of closure, and the detour route at least twenty-four (24) hours prior lo said road closure. a. The County of San Joaquin Public Works Department d. Tbe local fire district b. Tbe County of San Joaquin Sheriffs Office e. Tbe local school district c. The local postal service f. Tbe 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 Perrnittee and stationed in advance of work to warn and direct traffic. C. Lights, signs and baITicades shall be furnished, erected and maintained by the Permittee for the adequate warning and convenience of the public, with particular attention to be talcen in this regard after dark. D. Any excess dirt and/or debris which might be a hazard to either automobile or pedestrian h·affic, uncontrollable by lights, signs and banicades, shall be removed from the jobsite daily. STRUCTURES: A. Walls of structures shall be such quality and strength that they will resist all press mes 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 coucrete pipe placed under county road tights-of-way shall conform to the following American Association of State Highway and transportation Officials (AASHTO) designations. l. For concrete pipe up lo and including thirty-three inches (33") inside diameter, extra strength concrete conforming to AASHTO 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 A.ASHTO Designation M294. B. All concrete pipe joints wilh County road rights-of-way shall be sealed against leakage and/or infiltration with rnbber gasket in couformance with Section 65-1 :06 of the California Staudard Specificatious, or with other methods as may be pennitted 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 shuctures to be bmied within the County rights-of-way shall be set at such elevations as to allow minimum coverage of thirty incbes (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-of-way, no part of which shall extend above the elevations slated above; man.holes, lampholes, valves, etc. not included. Fuh1re surface elevations shall be anticipated as nearly as possible and st:ruchu-e elevations shall be established for futme adjustments accordingly. E. The County hereby reserves the right to specify in tbe Special Provisions the gage and surface treatment of any galvanized 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) I ines. REPAIRS OF THE COUNTY RIGHT-OF-WAY: A. All excavations shall be backfilled and compacted immediately after work therein bas been completed. B. Trencbed shall not be left open fa11ber 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 reqttired. E. No portion of tbe excavation(s) shall be compacted by pm1ding 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 lo the full depth of U1e lift. G. All pavements, curbs, gutters, sidewalks, bonow ditches, pipes, bead walls, road signs, trees, sh,ubbe,y, 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 constiuctio.n. H. All sw-facing 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 surfacing 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. 1. Asphalt Concrete: Combined mineral aggregate shall confonn to the quality and gradation requirements for Type "A" one-half inch(J/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 smfacing 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 tlu·ee-qua1ter inch (3/4") maximum size aggregate Class 2 Aggregate Base specified in Section 26 of the California Standard Specifications. I. Before acceptance ofrepairs to the County road rights-of-way, all uusightly and detrimental dirt, dust and/or debris shall be removed and the construction areas left in a neat and presentable condition(s). I. If necessary, 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 surface, 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 of the work. X:\ENCROACI-U\-1.ENTS\Gent!ral Provisions (Encroachmt!nt Pennits)\Winter Weather Provisions.doi;x
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