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GENERAL PR0VISIONS GOVERNING INSTALLATION OF SUBSURFACE STRUCTURES AND PlPELINES WITRJJ~ COUNTY ~OAD-RlGRTS-OF-WAY · '.PUBLIC CONVENEENCE AND SAFETY: A Before obsiructing any private driveway e11trance or County road traveled way with a trench, spoil bank, eguipme11t qr other barrier permitted for any prolonged.period of~n:rn, the Permitte::,shall notify the mown users of ihe respective 1:1.!,r-ougbfare(s) involved, and shall provide a=ss for vehicalai:-and B. .c. D .. pedestrian tra:fifo to and from the road. · · . 1. Unless otherwise _permitted, all work shall be conducted in such amao.IJ.erthatno less than Bne lane of the eristipg County road traveled way will be maintained open to public traffic during worldng hours in a smootlumd safe riding conclition(s ). Two lanes shall be open after working hours. 2. In cases where road closure is pe1IDJ.'tted, the perrnissio11 to close the road will be granted under ,the condition that the Permitlee notify the foITowing persons and/or agencies of the.time, tire period: of closure, and-the detour route .at least twenty-four (24) hours prior to said.road closure. a. The County.ofSanJo.aquinPublic Works Depa,,--fment .d. The local fire district b. Tht\' County of San Joaquin Sheriffs Office e. The local school district c. The local postal service · f The local resldents in.valved Should hazardous c'onclitians relative to the installati.on.operations wammJ ;flagmen, as many capable fl-a:gmen as may be Jiecessary shall be provided.by the · P=iri.ee and stationed in adva11ce ofwor:lcto warn a11d direct traffic. . Lights, signs and barricades shall be furnished, erected a11d maintained by the Perrnittee for the adequate warning a11d convenienc~ oftb.e public, with particular attention to be taken m this regard after dark. Any excess dirt and/or debris which might be a hazard to either automobile oi pedestrian traffic, \Jil.COntrollable by lights, signs and barricades, shall be remaved from the jobsite daily. · STRUCTURES:. A Walls ofstructni-es shall be such quality and strength-that they will resist all pressures an.d will not crack~r be deformed m such a wey as to create ahaz~d · or maintenance problem at a11y time. Tfierefore, the minimum structural requirements for cpncrete pipe placed under county road rights-of:.way shall conform to the'.fullowi:ng American: Association of State Highway an.d tra11sporration Officials (AASHIO)' designations. · 1. For ctincrete pipe up to and mcluding thirty-three mches (33") inside-diameter, extra strength concrete conforming to AASE!.'TO Designation M 170:M. . · · 2. For concrete pipe thirty-six inches (36") inside diameter and larger, reinforced concrete pipe confoi:ming to AASHIO Desigo.afion M 170M Class DI. . . ' 3. Plastic pipe COll.1.7:lrmingto AASHTO Designation M294-. . B. All concrete pipe joints with County road right:-of-way shall be sealed a,,aainst leakage and/or.infiltration with rubber gasket in COlll.7:lrmance with Section. 65-1:06 of the California standard Specifications, or with other methods ~maybe permitted under the: Special Provisions. · C. Cast-in-place concrete pipe, vitrified clay pipe, spiral welded steel pipe, or corrugated aluminum alfo.Y, pipe shall not be installed within the Coun1y road rights-of-way unless speci:fically so stared in the Special Provisions, and only under the conditions as provided. D, All structures to be 'buried within the County rights-of-way shaft lie 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 fJ..a:t pl3?e extending across the rights-of-way, no part ofwhfoh shall extend above the elevations stated above; manhoies, Jampho)es, 11alves, etc. not included. FUJ.'ure surface elevations shall be a11ticipated 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 S,P.ecial Provisions the gage and surfac~ treatment of any galvamzed corrugated metal pipe that-is to be installed. F. All longitudinal utility facilities are to be estah&hed f. 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. B. Trenched shall not be left open farther tha1130_D feet in advance of pipe laying operations, or 200 feet to the 3:ear thereat; ucless otherwise peilILL'tt<;d by 1jle Engineer. · . . C. . Unless otherwise permitted UJJder the Special Provisions, backfill shall be placed and mecli.anically compacted in ·such ama!lller that the relative compaction through.out the entire fill within the County road rigqt-of-way shall conform to the percentages of compaction as shown 011 the Trench detail . . D. Baclcfill material shall be placed in horizontal uniform layers not to exceed in thl~koess, before compaction, 0. 67 foot in the bedding regiori, one -foot where 90% compaction is required, and two-feet where 8-0% comp,action is required. · · E. No p'ortion of the excavation(s) shall·be compacted by ponding or jetting un1ess a maintenance bond is provided. F. Gravel bac1cfill material shall be utilized only where specifically so sta.."ed on the face of the permit It shall be compacted by means of a high-frequency i.o.temal vibrator, the compactor to be a size a11d type approved by the Engineer. P0ints of compaction shall not be greater than 18" ce11ters and t6 the full depth of the lift. . · G. All pavements, curbs, gutters, sidewalks, b·orrow ditches, pipes, head walls, road signs, trees, shrubbery, and/or other permanent road facilities impaired by or as a result of construction operations at tlie consiruction site(s) occupied by materials and/or equipmeni;, shall be restored immediately upon backfilling of the eitcavation to the original grades md cross sections, and to a co11dition as good as, or better than existing prior to construction. R · All surfacing materials ofroadways and driveway approaches cut or damaged by or as· a result of consiructio~ operations, shall be replaced within'ONE 'WEEK following the backfilling of excavation, weather permitting, with compacted I.ayers of surfacing materials at least as thick as fue existing, and no less . thm two inches (2") of asphalt concrete over six inches (6") of aggregate base, both as specified below. . · ":h • Asphalt Concrete: Combined mineral aggregate shall conform to the quality and gradation requireme11ts for 'fype ''B" ·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), UJJless 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 confon;n to the quality a11d the grading for three-quarter inch (3/4") maxim.lllll size aggregate Class 2 Aggregate Base specified in Section 26 of the California Standard Speci:fications. 1 Before acceptance of repairs to the County road rights-of-way, all unsightly and detrimental dirt, dust and/or debris shall be removed a11d the construction areas left in a neat and present.able condition(s). L If necessary, County road traveled way and driveway p<!Yements shall· be washed with water to remove dirt and dust 2. Driveway approaches and field entra11ce pavements damaged by equip.mentor spoil banks shall be ;epaired as directed by the Engineer. J. Upon request by the County, any settlement, sagging of surface, or cracldng of pavement shall be repaired ii.7lID.ed.iate!y by and at the sole expense of the Permit:'"i.ee for a period of one year following acceptance .of the work . F:\PERMITS COUNIER\general provisions\Winter W ea!her Pruvisioru.doex . ,
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