Attachment D.pdf
PDF 121 KB Posted
- Attached to
- ANDERSON FULL DEPTH PATCHING US-76 State and local contract opportunity
- Solicitation number
- 5400024899
- Issued by
- Allendale County, South Carolina
About this file
This is an Asphalt Binder Adjustment Index specification document issued by the South Carolina Department of Transportation (SCDOT) effective March 3, 2009, which establishes the framework for price adjustments on asphalt binder-related work items throughout the state. The document outlines the methodology by which SCDOT will apply Asphalt Binder Adjustments to specified contract items when the Index for Asphalt Binder (PG64-22) varies more than 5% from the Base Index price established at contract execution. SCDOT maintains a monthly Index for Asphalt Binder derived from quotations from current asphalt binder suppliers, with the Index posted on the first and seventeenth of each month on the Department's Internet portal. The Base Index date is established prior to the highway letting for each affected contract, and adjustment increments are displayed in tabular form on SCDOT's AC Binder Chart.
The document specifies Asphalt Binder Content factors (measured in tons of asphalt binder per unit of work) for thirty-one different work item categories eligible for index adjustments, including liquid asphalt binders, full depth patching at various depths, single, double, and triple treatments, microsurfacing, and high-performance chip seal. Per-unit index adjustments are calculated by multiplying the Asphalt Binder Content factor by the Asphalt Binder Index Change. Additional provisions establish that estimate periods vary by district (Districts 2, 3, and 5 use calendar months; Districts 1, 4, 6, and 7 use the seventeenth through the sixteenth), that the asphalt binder index in effect on the contract completion date becomes the ceiling for adjustment purposes if work continues beyond the completion date, and that these provisions apply to supplemental agreements, overruns, and contract extensions for specified items.
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Other files for this state and local contract opportunity
| File | Type | Posted |
|---|---|---|
| Attachment C.pdf | ||
| Attachment B.pdf | ||
| Attachment A.pdf | ||
| Solicitation.pdf | ||
| Attachment E.pdf | ||
| Attachment F.pdf |
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Text version
March 3, 2009
ASPHALT BINDER ADJUSTMENT INDEX
General: The Bidder is advised that the Department will apply Asphalt Binder Adjustments for specified items of work when the Index for Asphalt Binder (PG64-22) varies more than 5% from the Base Index price established for the contract.
Index: The Department maintains an Index for Asphalt Binder, which is an average of quotations from current asphalt binder suppliers, effective on the 1st and 17th of each month. The resulting Index is posted in spreadsheet form on the Department’s Internet at https://www.scdot.org/business/constructionletting-monthlyindex.aspx.
Base Index: The Department sets a Base Index date for each contract subject to Asphalt Binder adjustments with the date set prior to the highway letting. The Index for Asphalt Binder on that Base Index date sets the framework of the 5% adjustment increments to be used for the contract.
Tables showing the adjustment increments are displayed in the above noted spreadsheet (AC Binder Chart tab).
Asphalt Binder Content Factors: The following table shows the Asphalt Binder Content factor (tons of Asphalt Binder per unit of work) for SCDOT work items that are subject to this specification. In order to be eligible for index adjustments, the work item(s) must be specifically indicated in the Special Provisions of the Contract.
Items of Work Eligible for A.C. Binder Adjustments Unit AC Binder Tons
Liquid Asphalt Binder (PG64-22) TON 1.0000 Liquid Asphalt Binder (PG76-22) TON 1.0000 Full Depth Patching - 4" (AC Binder) SY 0.0110 Full Depth Patching - 6" (AC Binder) SY 0.0165 Full Depth Patching - 8" (AC Binder) SY 0.0220 Full Depth Patching - 10" (AC Binder) SY 0.0275 Full Depth Patching - 12" (AC Binder) SY 0.0330 Single Treatment Type-1 (0.38 gal/sy AC) SY 0.0016 Single Treatment Type-2 (0.38 gal/sy emulsion) SY 0.0011 Single Treatment Type-3 (0.25 gal/sy emulsion) SY 0.0007 Single Treatment Class-A (0.30 gal/sy emulsion) SY 0.0008 Double Treatment Type-1 (0.82 gal/sy emulsion) SY 0.0023 Double Treatment Type-2 (0.97 gal/sy emulsion) SY 0.0027 Double Treatment Type-3 (0.55 gal/sy emulsion) SY 0.0015 Double Treatment-Class A Special (0.66 gal/sy emulsion) SY 0.0018 Triple Treatment-Type 1 (0.85 gal/sy emulsion) SY 0.0024 Triple Treatment-Type 2 (0.71 gal/sy emulsion) SY 0.0020 Triple Treatment-Type 4 (0.82 gal/sy emulsion) SY 0.0023 Asph Surf Trmt - Single Treatment (0.28 gal/sy mod. Emulsion) SY 0.0008 Asph Surf Trmt - Double Treatment (0.48 gal/sy mod. Emulsion) SY 0.0013 Microsurfacing, Type II SY 0.0007 Microsurfacing, Type II - Leveling TON 0.0800 Emulsion for High Performance Chip Seal (Macrosurfacing) Gal 0.0028 https://www.scdot.org/business/constructionletting-monthlyindex.aspx
Per unit index adjustments are determined by multiplying the Asphalt Binder Content factor by the Asphalt Binder Index Change (minimum of incremented range). The resulting per unit amount is then applied to the construction estimate as a line item adjustment.
Additional Provisions:
A. The Department will calculate and apply Asphalt Binder Index Adjustments to estimates based on Index values set at the beginning of the estimate period.
o Districts 2, 3, and 5 - Estimate period begins on the 1st of the month and ends on the last day of the month. The 1st of the month Index will be compared to the contract Base Index to determine Index adjustments for the estimate period.
o Districts 1, 4, 6, and 7 - Estimate period begins on the 17th of the month and ends on the
16th day of the following month. The 17th of the month Index will be compared to the contract Base Index to determine Index adjustments for the estimate period.
B. In the event the work (on a contract item subject to asphalt binder adjustment) continues after expiration of the contract completion date, the asphalt binder index in effect on the contract completion date will become the ceiling (or maximum) of indexes to be applied for the work.
Lower indexes will be applied, while higher indexes will be limited to the ceiling noted.
C. This provision shall apply to supplemental agreements, overruns and extensions to this project for the specified item(s) to be adjusted.
D. The Base Index, Current Index and Adjustments may be referenced directly on the
Department’s Index spreadsheet at https://www.scdot.org/business/constructionletting-monthlyindex.aspx.
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