|
X:\ENCROACHMENTS\General Provisions (Encroachment Permits)\Winter Weather Provisions.docx
<br />GENERAL PROVISIONS
<br />GOVERNING INSTALLATION OF SUBSURFACE STRUCTURES AND PIPELINES WITHIN COUNTY ROAD RIGHTS-OF-WAY
<br />
<br />PUBLIC CONVENIENCE AND SAFETY:
<br />
<br />A. Before obstructing any private driveway entrance or County road traveled way with a trench, spoil bank, equipment or other barrier permitted for any
<br />prolonged period of time, the Permittee shall notify the known users of the respective thoroughfare(s) involved, and shall provide access for vehicular and
<br />pedestrian traffic to and from the road.
<br />1. 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
<br />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.
<br />2. In cases where road closure is permitted, the permission to close the road will be granted under the condition that the Permittee notify the
<br />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.
<br />a. The County of San Joaquin Public Works Department d. The local fire district
<br />b. The County of San Joaquin Sheriff’s Office e. The local school district
<br />c. The local postal service f. The local residents involved
<br />B. Should hazardous conditions relative to the installation operations warrant flagmen, as many capable flagmen as may be necessary shall be provided by the
<br />Permittee and stationed in advance of work to warn and direct traffic.
<br />C. Lights, signs and barricades shall be furnished, erected and maintained by the Permittee for the adequate warning and convenience of the public, with
<br />particular attention to be taken in this regard after dark.
<br />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
<br />removed from the jobsite daily.
<br />
<br />STRUCTURES:
<br />
<br />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
<br />or maintenance problem at any time. Therefore, the minimum structural requirements for concrete pipe placed under county road rights-of-way shall
<br />conform to the following American Association of State Highway and transportation Officials (AASHTO) designations.
<br />1. For concrete pipe up to and including thirty-three inches (33”) inside diameter, extra strength concrete conforming to AASHTO Designation M
<br />170M.
<br />2. For concrete pipe thirty-six inches (36”) inside diameter and larger, reinforced concrete pipe conforming to AASHTO Designation M 170M Class
<br />III.
<br />3. Plastic pipe conforming to AASHTO Designation M294.
<br />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
<br />65-1:06 of the California Standard Specifications, or with other methods as may be permitted under the Special Provisions.
<br />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
<br />rights-of-way unless specifically so stated in the Special Provisions, and only under the conditions as provided.
<br />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
<br />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
<br />below a flat plane extending across the rights-of-way, no part of which shall extend above the elevations stated above; manholes, lampholes, valves, etc. not
<br />included. Future surface elevations shall be anticipated as nearly as possible and structure elevations shall be established for future adjustments accordingly.
<br />E. The County hereby reserves the right to specify in the Special Provisions the gage and surface treatment of any galvanized corrugated metal pipe that is to be
<br />installed.
<br />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
<br />(border) lines.
<br />
<br />REPAIRS OF THE COUNTY RIGHT-OF-WAY:
<br />
<br />A. All excavations shall be backfilled and compacted immediately after work therein has been completed.
<br />B. 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
<br />Engineer.
<br />C. Unless otherwise permitted under the Special Provisions, backfill shall be placed and mechanically compacted in such a manner that the relative compaction
<br />throughout the entire fill within the County road right-of-way shall conform to the percentages of compaction as shown on the Trench detail.
<br />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
<br />90% compaction is required, and two-feet where 80% compaction is required.
<br />E. No portion of the excavation(s) shall be compacted by ponding or jetting unless a maintenance bond is provided.
<br />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
<br />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
<br />depth of the lift.
<br />G. All pavements, curbs, gutters, sidewalks, borrow ditches, pipes, head walls, road signs, trees, shrubbery, and/or other permanent road facilities impaired by
<br />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
<br />the excavation to the original grades and cross sections, and to a condition as good as, or better than existing prior to construction.
<br />H. All surfacing materials of roadways and driveway approaches cut or damaged by or as a result of construction operations, shall be replaced within ONE
<br />WEEK following the backfilling of excavation, weather permitting, with compacted layers of surfacing materials at least as thick as the existing, and no less
<br />than two inches (2”) of asphalt concrete over six inches (6”) of aggregate base, both as specified below.
<br />1. Asphalt Concrete: Combined mineral aggregate shall conform to the quality and gradation requirements for Type “A” one-half inch(1/2)
<br />maximum aggregate, coarse or medium gradation as specified in Section 39 of the California Standard Specifications. The bituminous binder to
<br />be mixed with mineral aggregate shall be paving asphalt having (Grade PG 64-10), unless otherwise directed by the Engineer. Placement of
<br />asphalt concrete surfacing shall conform to the applicable provisions of Section 39 of the California Standard Specifications.
<br />2. Aggregate Base: Combined mineral aggregates shall conform to the quality and the grading for three-quarter inch (3/4”) maximum size
<br />aggregate Class 2 Aggregate Base specified in Section 26 of the California Standard Specifications.
<br />I. Before acceptance of repairs to the County road rights-of-way, all unsightly and detrimental dirt, dust and/or debris shall be removed and the construction
<br />areas left in a neat and presentable condition(s).
<br />1. If necessary, County road traveled way and driveway pavements shall be washed with water to remove dirt and dust.
<br />2. Driveway approaches and field entrance pavements damaged by equipment or spoil banks shall be repaired as directed by the Engineer.
<br />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
<br />Permittee for a period of one year following acceptance of the work.
|