9−83938.03.2 Diesel Fuel. The fuel for operating the plant, and the fuel for hauling and placing bituminous concrete, will equal the total number of tons of bituminous concrete placed during the month in question times a fuel adjustment factor of 2.5 gallons of fuel per ton of bituminous concrete. Tonnage of bituminous concrete placed during the month in question will equal the sum of the weights indicated on the Daily Automated Recordation printout slips provided at the plant. The Price Adjustment will be determined by multiplying the total volume of fuel, in gallons, by the difference between the base price and the period price. No price adjustment will be made unless the amount of the adjustment, plus or minus, exceeds $250.00 for the month. The Base Price of Diesel Fuel is set forth in Special Provision Code 938.1000 . STONE WALLS IN HISTORIC, SCENIC OR RURAL AREAS 939.01 DESCRIPTION . This work consists of the resetting and construction of stone walls in historic, scenic, or rural areas. Such walls require special treatment as indicated herein, and shall be constructed at locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 939.02 MATERIALS .
939.02.1 Stones . Stones for walls to be reset shall include stones in the existing wall, with
additional stones as required to complete the wall construction. Additional stones shall conform to the stones in the existing wall relative to shape, color, texture and geological composition. Stones for new walls shall conform to stones found in nearby walls relative to the aforementioned characteristics, unless otherwise noted on the Plans or directed by the Engineer. Stones used below grade, for the core, or for the back of a retaining wall need not meet these criteria. However, the stones must conform to SECTION M.14; STONE FOR MASONRY , of these Specifications, and must be appropriately sized and shaped to permit proper interlocking with the existing stones. Any special features such as lintels, gate posts, copings, markers, etc., shall be retained for resetting. 939.02.2 Mortar . Mortar shall conform to the requirements of Subsection M.04.03.5; Mortar , of these Specifications. 9−84 939.03 CONSTRUCTION METHODS.
939.03.1 General Requirements . The construction of new walls or the resetting of existing walls
will be carried out as indicated on the Plans. Laying of stones shall conform to the requirements of Subsections 911.03 and 912.03 of these Specifications for wet masonry walls and dry-laid walls, respectively. The construction of walls in historic areas must be accomplished by stone masons with demonstrated proficiency in historic stone masonry construction/restoration practices. Documentation in the form of professional certifications and the locations of at least three successfully completed stone walls similar in type to the work to be performed must be presented to the Engineer no less than 30 days prior to the start of work. This documentation must be approved by the Engineer in consultation with the RIDOT Historic Preservation Specialist in order for the masonry contractor to be allowed to perform the work. The approved mason(s) are to complete the entire work item for which the approval was given. 939.03.2 Documentation . Prior to dismantling historically significant walls, the Contractor will measure and record their width and height at 25-foot intervals and at locations where characteristics of the wall change. He must also take a minimum of six, 35mm, 4-inch by 6-inch color photographs of each wall to be dismantled. The photographs are to be taken in locations that are representative of the walls original type. If no representative wall sections exist, the Engineer in consultation with the RIDOT Historic Preservation Specialist will determine the finished appearance/dimensions. Two copies of the meas urements and two sets of photographs are to be given to the Engineer. This documentation mu st be reviewed and approved by the Engineer in consultation with the RIDOT Historic Preservation Specialist for accuracy before the walls are dismantled. Once approved, this record of the walls will be referenced during the reconstruction of the walls and will remain the property of the State. 939.03.3 Dismantling . Historically significant walls to be removed and reset must be carefully dismantled to avoid fracturing and chipping the stones. The stones shall be stockpiled in the area where the wall is to be rebuilt. If they must be tem porarily moved to a different location, they must be kept separate from any other stones. Use of a dump truck will not be permitted to transport stone from historically significant walls. The Contractor will be responsible for protecting all stockpiled stones from damage, theft and vandalism. 939.03.4 Resetting . Exposed face(s) must be composed of stones from the extant walls. Care shall be taken during resetting to keep weathered stone faces exposed. Additional stones required to complete the walls are to be blended with the ex isting stone in order to reduce any incompatibility in the appearance of the walls. The Contractor shall carefully duplicate the original wall and any special features such as lintels, gateposts, openings, copings, markers, etc. 939.03.5 New Walls . When new stone walls are required in the vicinity of historic properties and districts, a 5-foot long sample section of wall must be constructed. The Engineer in consultation with the RIDOT Historic Preservation Specialist is to approve stone, joint construction and overall character of installation of the sample section. The approved sample section may be part of the finished work. A rejected sample section must be demolished and rebuilt to the approval of the Engineer. 939.0376 Weep Holes. Weep holes shall be constructed of solid, gray PVC pipe in the manner and at the locations indicated on the Plans or required by the Engineer. 9−85939.03.7 Cleaning . All excess material shall be removed and the site left in a presentable condition, satisfactory to the Engineer. If surp lus stones exist, the Engi neer will determine whether to transport the surplus stones to an offsite, permanent stockpile area, or to dispose of the material.
939.04 METHOD OF MEASUREMENT . “Stone Walls in Historic, Scenic or Rural Areas” will be
measured either by the number of linear feet (m easured along the centerline of the wall) or the number of cubic yards of masonry, as applicable, actually placed in accordance with the Plans, these Specifications and/or as directed by the Engineer. 939.05 BASIS OF PAYMENT . The accepted quantity of “Stone Walls in Historic, Scenic or Rural Areas” will be paid for either at the contract unit price per linear foot (m easured along the centerline of the wall) or by the contract unit price per cubic yard of masonry, as listed in the Proposal. The price so-stated constitutes full compensation for all labor, materials, and equipment, including documenting and dismantling of the existing wall, stockpiling of stone, removal of stones from the stockpile, all necessary cutting/dressing of stones, reconstruction of special features, construction of weep holes, cleaning, and all incidentals required to finish the work, complete in place and accepted by the Engineer. Special site preparation such as clearing and grubbing or gravel base courses will be paid for under other appropriate Proposal items of the Contract. Removal and stockpiling of surplus stone at an offsite, permanent stockpile location will be paid for under an appropriate Proposal item in the Contract. Stones required to construct new walls or to supplement quantities of stones in existing walls will be paid for under separate Proposal item(s) in the Contract. SECTION 940 ON-SITE ADMINISTRATION FACILITY 940.01 DESCRIPTION . This work consists of providing and maintaining a suitable weatherproof unit on the project site to be used for the on-site administration of the Contract. The facility will not be for the exclusive use of the State, but will be for administration activities only. 940.02 GENERAL REQUIREMENTS. 940.02.1 Minimum Spatial Requirements . Unless specified otherwise in the Special Provisions of the Contract, the facility shall contain a minimum of 128 square feet of floor area and 7 feet of headroom. It shall have suitably located windows (two vented and one fixed) to provide at least 20 square feet of natural light, and one exterior entrance door. A commercial office trailer, 16 feet by 8 feet, is considered to satisfy the above requirements.