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Contractor's View of Excess Fill Site Selection

Contractor's View of Excess Fill Site Selection. KYTC Partnering Conference September 7, 2016 The whats and the wheres of Excess Fill sites – A contractor’s view of Excess Fill Site selection to aid KYTC project teams with better insight into excess excavation fill sites.

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Contractor's View of Excess Fill Site Selection

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  1. Contractor's View of Excess Fill Site Selection KYTC Partnering Conference September 7, 2016 The whats and the wheres of Excess Fill sites – A contractor’s view of Excess Fill Site selection to aid KYTC project teams with better insight into excess excavation fill sites. Presented by Lester Wimpy, PE Bizzack Construction, LLC

  2. Excess Fill – The Beginning • Excess Fill – What is it? • Excess Fill is the amount of material in excess of the amount needed for the construction of the project. • Specifications - Section 205 • Fill Areas Must be Approved. • Excess material may be placed adjacent to the embankment or incorporated in embankment • Offsite Fill Areas require Property Owner Agreement and generally have environmental requirements

  3. Design Phase Considerations • Balance Project as much as possible • Revise Fill slopes – Benefits include guardrail elimination, reduced drainage costs • Shrink/Swell Factors • Earth (15% shrink) • Limestone (20% swell) • Sandstone (15% swell) • Shale (5 to 10%) • RDZ (0 to 5%)

  4. Centerline Location • Consider Possible Excess Fill Areas during Centerline location. • Some additional excavation may create more space for excess fill • Moving centerline to one side of hollow may increase potential fill area

  5. Centerline Location Example

  6. Planning Considerations • KRS 176.525 Use of identified potential industrial park sites as construction waste sites -- Deeding of site to local government -- Consultation with local government officials in site identification. • During the construction phase of a new road construction project, potential industrial park sites identified during the design phase shall be used as waste sites by the department or the contractor who was awarded the project. • The department shall consult with the appropriate elected officials affected by new routes proposed to be constructed in the six (6) year road plan. The department shall consult with the appropriate elected officials to identify waste sites along the proposed new routes that may be potential industrial park sites.

  7. KYTC Excess Fill Site Example

  8. Excess Fill Area Factors • Property Ownership • Is the owner interested or opposed to fill placement? • Is the ownership complicated (heirs, financial, etc) • Monetary considerations (royalty, purchase, free) • Subsurface ownership impacts • Utilities • Overhead lines • Buried lines (gas, water, electric, etc) • Gas Wells

  9. Excess Fill Area Factors • Environmental • Streams and Wetlands (404 and 401 Permits) • Endangered Species (Bats) • Floodplain Permits • Archaeology and Historical • Mitigation Costs • Access and Haul Route • Off-road Equipment vs On-road Access • Traffic and Phasing Impacts • Conditions of existing roads (width, pavement) • What is below the potential access road

  10. Site Selection Steps • Mass Diagram – Where is the Excess? • Use appropriate shrink/fill factors • Identify traffic crossings • Identify bridges • Help to keep track of balance • Identify haul distances to potential excess fill areas

  11. Mass Ordinate Example Fill Area

  12. Mass Diagram Fill Area

  13. Site Selection Steps • Mapping, DTM – Needed to determine configuration and volumes • Project mapping • ftp://ftp.kymartian.ky.gov/kyaped/DEMs_5FT/ • USGS Maps • Google Earth – Identify existing conditions and potential access • KMZ Files • Site Visit – Verify existing conditions, visualize obstacles, traffic, identify environmental factors, potential stability issues, utilities

  14. Site Selection Example

  15. Where Excess Is Located • West of Interchange • 1,280,000 CY Excavation • 124,000 CY Embankment • East of Interchange • 2,000,000 CY Excavation • 1,860,000 CY Embankment

  16. Access Route Problems

  17. Environmental Impacts • Gas Well • Mitigation Fees - Stream Loss over $3 million

  18. Optional Area East of Interchange

  19. Optional Area West of Interchange

  20. Site Selection Example

  21. Drainage Revisions

  22. Fill Site Configuration • Access/Haul Road • Access from the bottom of hollow fills may require access roads on the face. • Haul road width need to be 50-60’ wide for large offroad trucks. 40’ width for articulated trucks • Access road maximum grades from 10% to 16%. • Use 3:1 to estimate front face of tall fills before haul roads are designed.

  23. Configuration of Steep Fill Area

  24. Use of Excess Fill - Reclamation

  25. Summary • Excess fill should be considered a part of project design • Environmental impacts should be evaluated during excess fill site selection • Consider access, traffic, phasing, and physical barriers • Excess fill is not Waste!

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