SECTION 405: DETOUR PAVEMENTS
405.1 Description
This Work consists of the following: 1. Providing and placing surfaci ng Materials, including Subgrad e preparation, Base Course, prime coat, asphalt Material, tack coat, and OGFC, as required in accordance with the Plans; 2. Maintaining, removing, hauli ng, and disposing of Detour pave ments in an environmentally-Acceptable manner; and 3. Hauling and stockpiling salvageable Detour pavements as dire cted by the Project Manager. Unless otherwise noted in the Contract, Detour pavements do not include Detour Embankments, drainage, and major Structures. Embankment, drain age, and major Structures will conform to their applicable sections.
405.2 Materials
405.2.1 General
The Contractor shall obtain surfacing Material for the Detour c onstruction from a suitable source in accordance with Section 106, “Control of Materials.”
405.2.2 Alternate Pavement Section
Two (2) weeks before constructing the Detour, the Contractor ma y submit an alternative detour pavement section proposal t o the Project Manager for app roval. The proposal shall include the surfacing thickness and the types of Materials. The approved alternate Detour pavement section must have at lea st the same structural number specified in the Contract. The Contractor shall determine the structural number in accorda nce with the values in Table 405.2.2:1, “Structural Coefficients.” Table 405.2.2:1 Structural Coefficients Description Structural coefficient Base Course 0.11 Hot-mix asphalt (HMA) 0.44 Cold-mixed asphalt pavementª 0.15 ªThe Contractor may use cold-mixed asphalt pavement in low-traf fic areas, with the District Construction Engineer’s written approval.
405.3 Construction Requirements
405.3.1 General
The Contractor shall construct the Detour pavement in accordanc e with the following applicable Specifications: 1. Section 207, “Subgrade Preparation;” Section 405: Detour Pavements Page 171 2. Section 303, “Base Course;” 3. Section 403, “Open Graded Friction Course;” 4. Section 407, “Tack Coat;” 5. Section 408, “Prime Coat;” 6. Section 416, “Minor Paving” 7. Section 423, “Hot Mix Asphalt ( HMA) (Major Paving) ;” and 8. Section 424, “Warm Mix Asphalt (WMA).”
405.3.2 Contractor Testing/Design Requirements
The Contractor shall provide Subgrade R-values for the top two (2) ft of the Detour Subgrade by using AASHTO T-190.
405.3.3 Maintenance of Detour Section
The Contractor shall: 1. Ensure the maintenance and repair of the Detours minimizes t he impact to the traveling public; and 2. Maintain safe traffic fl ow during construction. If the Project Manager determines that the Detour surfacing is damaged, the Contractor shall correct the problem immediately. If the Project Manager determines that the corrective actions failed, overlay the Deto ur with additional HMA at no ad ditional cost to the Department. If the Contractor does not immediately fix the Detour surfacing as directed by the Project Manager, the Department will assess damages in accordance with the following Table for each Day that the Detour remains unacceptable to the Project Ma nager. Table 405.3.3:1 Schedule of Damages Total Original Contract Amount ($) Charge ($) per Day ≤100,000 500 >100,000-500,000 1,000 >500,000-1,000,000 1,500 >1,000,000-2,000,000 2,000 >2,000,000-4,000,000 2,500 >4,000,000-7,000,000 3,000 >7,000,000-10,000,000 4,000 >10,000,000 5,000
405.3.4 Removal of Detours
When removing the Detour, the Contractor shall dispose of the s urfacing Material in an environmentally Acceptable manner, o r salvage the Material as s hown in the Contract. The salvage of the Detour pavement Material includes hauling an d stockpiling.
405.4 Method of Measurement
The Department will measure the Detour Pavement Construction actually placed and maintained on the top width and length of the detour if paid by the unit of the Contract Item. If no Contract Item exists for Detour Pavement Construction , payment will be Incidental to Section 405: Detour Pavements Page 172 Section 618, “Traffic Control Management” and Section 702, “Con struction Control Devices.”
405.5 Basis of Payment
Pay Item Pay Unit Detour Pavement Construction Square Yard
405.5.1 Work Included in Payment
The following Work or items will be considered as included in t he payment for Detour Pavement Construction and will not be measured or paid for sepa rately: 1. Submittals; 2. Maintenance of Detours; 3. Furnishing and placement of HMA/WMA, OGFC on Detours; 4. If designated in the Contract; Base Course; Removal of Detou r Materials including surfacing, earthwork, and drainage Structures; 5. Furnishing and placement of prime and tack coat; 6. Subgrade preparation; 7. Testing (includes AASHTO T190); and 8. Hauling and stockpiling of salvageable Materials. Section 407: Tack Coat Page 173