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AGGREGATE BASE. --Aggregate base shall conform to the requirements
<br />in Section 26, "Aggregate Base", of the Standard Specifications
<br />and these special provisions.
<br />Aggregate base shall be Class 2.
<br />The combined aggregate shall conform to the grading specified for
<br />the 3/4 -inch maximum aggregate.
<br />The R -Value requirements may be waived provided the aggregate
<br />base conforms to the specified grading and durability and has a
<br />sand equivalent value of 33 or more.
<br />ASPHALT CONCRETE. --Asphalt concrete shall conform to the
<br />requirements in Section 39, "Asphalt Concrete", of the Standard
<br />Specifications and these special provisions.
<br />Asphalt concrete shall be Type "B". Aggregate shall conform to
<br />the 1/2 -inch maximum, coarse or medium grading as determined by
<br />the Engineer. At the Contractors option, and with approval of
<br />the Engineer, aggregate may be 3/4 -inch maximum, medium grading
<br />with the exception of the final finish course.
<br />Aggregate conforming to the 3/8 -inch maximum grading will be
<br />permitted for use in driveways, dikes and other areas with
<br />approval of the Engineer.
<br />The amount of asphalt binder to be mixed with the aggregate shall
<br />be between 5 percent and 7 percent by weight of the dry
<br />aggregate. The exact amount of asphalt binder to be mixed with
<br />the aggregate and the AR viscosity grade of the asphalt binder
<br />will be determined by the Engineer. The provisions of paragraphs
<br />4 through 7 of Section 39-3.03 "Proportioning" shall not apply to
<br />this project.
<br />Paint binder shall be applied at a rate of approximately 0.05
<br />gallon per square yard, unless otherwise shown on the plans.
<br />When the asphalt concrete is to be produced in a batch plant, the
<br />asphalt concrete shall be proportioned and mixed by the automatic
<br />method.
<br />All steel -tired rollers shall be of the tandem type. The third
<br />paragraph of Section 39-5.02 "Compacting Equipment" shall be
<br />deleted.
<br />The tenth paragraph of Section 39-6.03, "Compacting", of the
<br />Standard Specifications, allowing the use of "alternative
<br />compacting equipment" shall be deleted.
<br />The prime coat liquid asphalt penetration grade shall be SC 70 or
<br />SC 250. The cost of the prime coat shall be included in the bid
<br />for asphalt concrete.
<br />The dumping of material in a windrow, in accordance with Section
<br />39-5.01, shall be limited to 750 feet in advance of the paving
<br />machine, unless otherwise permitted by the Engineer.
<br />Unless otherwise shown on the plans, asphalt paver equipment used
<br />to place asphalt concrete shall be equipped with full automatic
<br />screed and grade sensing controls which shall control the
<br />longitudinal grade and transverse slope of the screed. The
<br />controls shall be actuated by grade and slope references.
<br />Corrections on account of deviations from the references shall be
<br />automatic. Guides and references required to control the
<br />longitudinal grade and transverse slopes shall be furnished and
<br />installed by the Contractor.
<br />Should the Contractor elect to use a ski device for longitudinal
<br />control, the minimum length of the device shall be 30 feet. The
<br />device shall be a rigid unit mounted on multiple supports. Each
<br />support shall act independently of others and the finished grade
<br />shall not be affected by the action of a single support.
<br />Surfacing operations shall be conducted in such a manner that, at
<br />the end of each day's work, the distance between the ends of
<br />adjacent surfaced lanes shall not be greater than can be
<br />completed in the following day of normal surfacing operations.
<br />Portable delineators in conformance with Section 12-3.04,
<br />"Portable Delineators," of the Standard Specifications shall be
<br />furnished and placed at a maximum spacing of 300 fleet on tangents
<br />and 100 feet on curves along any edge of new surfacing which has
<br />a drop off of more than 0.10 foot. Delineators shall be
<br />staggered when required on both sides of traffic.
<br />EARTHWORK (ROADWAY WIDENING). --Earthwork for roadway widening
<br />shall conform to the requirements in Section 19, "Earthwork", of
<br />the Standard Specifications and these special provisions.
<br />After clearing and grubbing has been completed the existing
<br />native material and/or imported borrow shall be graded flush or
<br />to a constant dimension below the edge of the existing pavement
<br />as shown on the typical cross section for a minimum width of one
<br />foot outside of the new edge of pavement. The subgrade of the
<br />widened section shall be constructed to a 2 percent cross slope
<br />unless otherwise designated on the plans.
<br />The requirement of the first paragraph of Section 19-5.03 will
<br />not be required in the area between the outside edge of the
<br />existing pavement and the outside edge of new pavement whenever
<br />this area is one foot or less in width. All relative compaction
<br />of Section 19-5 shall be not less than 90 percent.
<br />The requirement of the second paragraph of Section 19-5.03 will
<br />not be required.
<br />N0. I REVISIONS I DATE I BY
<br />I -J
<br />to /7-9Z
<br />WE
<br />Unless otherwise shown on the plans, all surplus materials not to
<br />be salvaged, stockpiled or disposed of as provided in Section 19-
<br />2.06, shall become the property of the Contractor and disposed of
<br />as provided in Section 7-1.13 of the Standard Specifications.
<br />The contract price paid for earthwork (roadway widening) shall
<br />include full compensation for furnishing all labor, materials,
<br />tools, equipment and incidentals, and for doing all the work
<br />involved in earthwork (roadway widening), complete in place,
<br />including excavation, embankment, disposing, grading and
<br />compacting, as shown on the plans, as specified in the Standard
<br />Specifications and these special provisions, and as directed by
<br />the Engineer.
<br />When imported borrow is authorized by the Engineer separate
<br />payment will be made.
<br />EARTHWORK. --Earthwork shall conform to the requirements in
<br />Section 19, "Earthwork," of the Standard Specifications and these
<br />special provisions.
<br />The requirement of the second paragraph of Section 19-5.03 will
<br />be required only in those areas shown on the plan.
<br />In lieu of the tolerance specified in Section 19-1.03(b) of the
<br />Standard Specifications, the surface of the grading plane shall
<br />not be more than 0.05 foot above or below the grade established
<br />by the Engineer.
<br />Before grade is approved by the Engineer all earthwork (including
<br />driveways and slopes) shall be compacted to grade. Unless
<br />otherwise shown on the plans, all surplus materials not to be
<br />salvaged, stockpiled or disposed of as provided in Section
<br />19-2.06 shall become the property of the Contractor and disposed
<br />of as provided in Section 7-1.13 of the Standard Specifications.
<br />Unless otherwise shown on the plans, the existing pavement, when
<br />used as embankment, shall be broken up into pieces not larger
<br />than 0.33 foot in greatest dimension.
<br />Full compensation for breaking up the existing pavement shall be
<br />considered as included in the contract price paid per cubic yard
<br />for roadway excavation and no additional compensation will be
<br />allowed therefor.
<br />EARTHWORK (CONCRETE CURBS & SIDEWALKS). --Earthwork for concrete
<br />curbs and sidewalks shall conform to the requirements in Section
<br />19, "Earthwork", of the Standard Specifications and these special
<br />provisions.
<br />Excavation for concrete curbs and sidewalks along improved
<br />frontages shall be limited to six inches (6") behind new concrete
<br />construction adjacent to property line unless otherwise shown on
<br />the plans.
<br />All relative compaction of Section 19-5 shall be not less that 90
<br />percent, unless otherwise designated on the plans. The
<br />requirement of the second paragraph of Section 19-5.03 will be
<br />required.
<br />Ground area to be used for landscaping purposes, which has been
<br />excavated or is below finished grade, shall be backfilled with
<br />selected material or imported topsoil, free of stones, conforming
<br />to the provisions of Section 20-2.01, "Topsoil", of the Standard
<br />Specifications and these special provisions, unless otherwise
<br />shown on the plans. Backfilled material in ground areas shall be
<br />compacted equal to natural ground and may be compacted by ponding
<br />with water.
<br />The ground area adjacent to new concrete or pavement construction
<br />shall be graded flush to match new improvements as shown on the
<br />plans. Backfill material in slope areas greater than six to one
<br />shall be selected for resistance to erosion.
<br />Unless otherwise shown on the plans or specified in these special
<br />provisions, all surplus material not to be salvaged shall become
<br />the property of the Contractor and shall be disposed of as
<br />provided in Section 7-1.13 of the Standard Specifications.
<br />The contract unit price paid for Earthwork (Concrete Curbs &
<br />Sidewalks) shall include full compensation for furnishing all
<br />labor, materials, tool, equipment and incidentals and for doing
<br />all the work involved in Earthwork (Concrete Curbs & Sidewalks),
<br />complete in place, including the excavation of all material
<br />necessary for the construction of the facility and the obtaining
<br />and placing of selected material and imported topsoil, as shown
<br />on the plans, as specified in the Standard Specifications and
<br />these special provisions, and as directed by the Engineer.
<br />When the contract does not include a contract pay item for
<br />Earthwork (Concrete Curb & Sidewalks), full compensation for
<br />Earthwork (Concrete Curb & Sidewalks), shall be considered
<br />included in the unit prices paid for the various contract items
<br />of work and no further allowance will be made therefor.
<br />AGGREGATE BASE. --Aggregate Base shall conform to the requirements
<br />in Section 26, "Aggregate Base", of the Standard Specifications
<br />and these special provisions.
<br />Aggregate Base shall be Class 2.
<br />The combined aggregate shall conform to the grading specified for
<br />the 3/4 inch maximum aggregate.
<br />The R -Value requirement may be waived provided the individual
<br />test result of the aggregate base conforms to the specified
<br />grading and durability and has a sand equivalent value of 33 or
<br />more.
<br />Recycled asphalt concrete (R.A.C.) may be substituted for Class 2
<br />aggregate base, provided it meets the specified gradation and R -
<br />Value requirements. Durability and sand equivalent requirements
<br />shall be waived.
<br />If the results of the R -Value test on R.A.C. do not meet the
<br />requirements for Class 2 aggregate base, the aggregate base
<br />represented by the failing test shall be removed. However, if
<br />requested by the Contractor and approved by the Engineer, R.A.C.
<br />having an R -Value of 75 through 77 may remain in place and the
<br />Contractor shall pay to the County $2.25 per cubic yard for such
<br />aggregate base left in place. The County may deduct this amount
<br />from any monies due, or that may become due, the Contractor on
<br />this project. No single R -Value test shall represent more than
<br />2000 cubic yards or one day's production.
<br />The results of the R -Value test shall be known prior to placement
<br />of subsequent layers of material.
<br />CONCRETE CURBS AND SIDEWALKS. --Concrete curbs and sidewalks shall
<br />conform to the requirements in Section 73, "Concrete Curbs and
<br />Sidewalks", of the Standard Specifications and these special
<br />provisions.
<br />In lieu of the requirements of Section 73-1.05; weakened plane
<br />joints shall be constructed at 12 -foot maximum intervals on
<br />tangent sections and at a minimum of one-third points on radii.
<br />Where curb and gutter only is constructed, driveways shall be
<br />placed monolithically with the curb and gutter or shall conform
<br />to one of the following alternatives:
<br />(a) Dowels (5/8 inch diameter by 24 inches long) spaced at
<br />4 -foot intervals.
<br />(b) Keyway constructed 2 inches in height and one inch in
<br />depth.
<br />A uniform color shall be maintained by the addition of one pound
<br />of lamp black per cubic yard of concrete for curb, gutter and
<br />sidewalk construction.
<br />Walkway and driveway approaches providing access to private
<br />property that are constructed behind new sidewalk shall be
<br />colored and textured as required to match the existing facility.
<br />All concrete gutters shall be water tested for drainage before
<br />acceptance. The maximum deviation from a true grade shall not
<br />result in ponding water for a depth exceeding 0.02 foot.
<br />When the contract does not include a contract pay item for
<br />earthwork, full compensation for excavation, subgrade
<br />preparation, furnishing and placing selected material and
<br />imported topsoil, grading and compacting earthwork, and for
<br />disposing of materials shall be considered as included in the
<br />contract price paid for Minor Concrete and no separate payment
<br />will be made therefor.
<br />When the contract does not include a contract pay item for
<br />removing concrete, full compensation for removing concrete shall
<br />be considered as included in the prices paid for the various
<br />contract items of work and no separate payment will be made
<br />therefor.
<br />CONSTRUCTION
<br />SPECI FICATIONS
<br />ALSO SEE SEPARATE DOCUMENT:
<br />"SLURRY SEAL FOR TRENCH WORK
<br />AT MOKELUMNE /CHESTNUT STREETS-
<br />WOODBRIDGE "
<br />That i5 hereby Incorporated into
<br />these plans.
<br />MOKELUMNE, CHESTNUT,
<br />AUGUSTA STREET
<br />STREET IMPROVEMENTS
<br />SHM ( 1 ) of 7
<br />,ws no.
<br />9202 )9151
<br />FU No.
<br />G- 1012
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