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Design-Build Strategies to
Optimize Cost Effectiveness
in Abandoned Mine Remediation Projects

By
Franz Campero, PhD, PE
Background:
The Design-Build Delivery System
Advantages:
• Integrated Approach
• Single Responsible Entity
• Innovation
• ...
Design-Build Delivery System
Weaknesses:
• Acquisition Regulations of some Agencies
• Level of Detail in Performance Speci...
Modifications to Allow for Innovation
and Increased Scope
• DB allowed for in-field design that
utilized an upstream road ...
Modifications to Accommodate
Construction Schedule
• Liner design and specifications
modification (GCL to HDPE) to
keep th...
Modifications to Accommodate
Unforeseen Conditions
• DB approach modified original
consolidation cell approach into a
hybr...
Modifications to Accommodate
Challenging Access
• DB team evaluated site
access options and saved
more than $100,000 in
ac...
Modifications to Accommodate
Short Schedules
• Conducting this project as a
design-build eliminated the
costs of a pre-des...
Modifications to Accommodate
Unforeseen Conditions
•

•

•
•

DB approach modified original
consolidation cell approach to...
Modifications to Accommodate
Unforeseen Conditions
• Historic burial site discovered during
construction. DB team resolved...
Modifications to Reduce Cost
of Materials
• DB team modified original
consolidation cell approach to
utilize local borrow ...
Modifications to Accommodate
Short Schedules
• Conducting this project
as a design-build
eliminated the costs of a
pre-des...
Modifications to Allow for Innovation
and Challenging Access
• DB allowed for in-field
design and modifications to
maximiz...
Modifications to Accommodate
Unforeseen Conditions
• DB allowed for in-field design
and modifications to include
an increa...
Modifications to Minimize
Environmental Impact
• DB allowed
for in-field
design and
modifications to
maximize the
effectiv...
Modifications to Reduce Construction
Costs
• DB team modified original
consolidation cell
approach and
specifications to u...
Modifications to Minimize
Environmental Impact
• DB team evaluated options
for beneficial reuse of on-site
coal waste
• Se...
Questions?

Thank You!
Franz Campero, PhD, PE, MBA, DIC
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Design build strategies to optimize cost effectiveness in aml v2

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Design build strategies to optimize cost effectiveness in aml v2

  1. 1. Design-Build Strategies to Optimize Cost Effectiveness in Abandoned Mine Remediation Projects By Franz Campero, PhD, PE
  2. 2. Background: The Design-Build Delivery System Advantages: • Integrated Approach • Single Responsible Entity • Innovation • Shorter Schedule • Lower Cost • Reduced Risk to the Owner • Reduced Claims and Disputes Franz Campero, PhD, PE
  3. 3. Design-Build Delivery System Weaknesses: • Acquisition Regulations of some Agencies • Level of Detail in Performance Specifications • Design Professional’s new role These two eliminated by working proactively and in-line with the owner during design and construction Franz Campero, PhD, PE
  4. 4. Modifications to Allow for Innovation and Increased Scope • DB allowed for in-field design that utilized an upstream road to collect and re-route stormwater runoff away from tailings • Savings allowed for removal, consolidation and capping of tailings unaccounted for in the scope of the project • Savings allowed for construction of rock weir to retain sediments and avoid mercury methylation • Use of real-time chemical testing via XRF saved $5,000 in laboratory costs and several days in schedule delays Franz Campero, PhD, PE Bureau of Land Management – Helen Mine CERCLA Non-Time Critical Removal Action Lake Co, CA
  5. 5. Modifications to Accommodate Construction Schedule • Liner design and specifications modification (GCL to HDPE) to keep the cell unfinished (RA could not be completed in one field season) • Redesign of final cap (to accommodate an additional 20,000 cubic yards of waste discovered during RA) • Savings allowed for PUF closure of previously unknown shaft and installation of bat gates on several previously unknown adits • Estimated cost savings on the order of $200,000 Franz Campero, PhD, PE US Forest Services - Blue Ledge Mine Tailings Remediation and Site Restoration Rogue River-Siskiyou National Forest, OR
  6. 6. Modifications to Accommodate Unforeseen Conditions • DB approach modified original consolidation cell approach into a hybrid repository/cap-in-place system to include an increase of tailings volume of more than 14,700 cubic yards unaccounted for during the EE/CA at no additional cost • Use of real-time chemical testing via XRF saved $7,000 in laboratory costs and weeks in schedule delays Franz Campero, PhD, PE Bureau of Land Management – Sonoma Mine CERCLA Non-Time Critical Removal Action, Lake/Sonoma Co, CA
  7. 7. Modifications to Accommodate Challenging Access • DB team evaluated site access options and saved more than $100,000 in access roads and weeks in construction schedule by transporting equipment and RCRA hazardous wastes via helicopter • Effective radio communications and operational efficiencies saved an additional $60,000 in reduced flight times and man hours on the ground Franz Campero, PhD, PE US Forest Services - Black Bob Mine Site Removal Action Sierra National Forest, Kern Co, CA
  8. 8. Modifications to Accommodate Short Schedules • Conducting this project as a design-build eliminated the costs of a pre-design EE/CA, saving an estimated $75,000 • Use of real-time chemical testing via XRF saved $5,000 in laboratory costs and weeks in completion schedule • Savings allowed for additional road work and more than 2,000 feet of ditch repairs at no additional cost Franz Campero, PhD, PE US Forest Services - Poorman Forks Mine Time-Critical Removal Action of Mine Tailings Tahoe National Forest, Nevada Co, CA
  9. 9. Modifications to Accommodate Unforeseen Conditions • • • • DB approach modified original consolidation cell approach to include an increase of tailings volume of 15,000 cubic yards unaccounted for during the EE/CA at no additional cost To avoid design and construction of an additional cell, DB team raised the cap elevations and bridged the adit water flow by utilizing a buried rock drain Resulting estimated cost savings in the order of $75,000 and design and construction schedule of four weeks Use of real-time chemical testing via XRF saved an additional $5,000 in laboratory costs Franz Campero, PhD, PE Bureau of Land Management – Contact Mine CERCLA Non-Time Critical Removal Action Lake/Sonoma Co, CA
  10. 10. Modifications to Accommodate Unforeseen Conditions • Historic burial site discovered during construction. DB team resolved the issue with no impact to project schedule by reshaping and re-contouring tailings, and cap-in-place to avoid disturbing the archeological site • DB team allowed for in-line implementation of additional erosion controls, re-direction of surface drainage, and installation of buried HDPE drain from the adit (with rock-lined outfall to control erosion) to reduce the potential erosion of tailings from the insitu encapsulation area and to encourage natural re-vegetation Franz Campero, PhD, PE US Forest Services - Kern Piute Mines Removal Action Seqouia National Forest, Tulare Co, CA
  11. 11. Modifications to Reduce Cost of Materials • DB team modified original consolidation cell approach to utilize local borrow site beneath the planned consolidation cell (savings of more than $500,000) Bureau of Land Management – Kelly Mine CERCLA Remedial Action Ridgecrest, Kern Co, CA • Use of real-time chemical testing via XRF to save an estimated $30,000 in sample shipping, handling and laboratory costs, and weeks in delays Franz Campero, PhD, PE
  12. 12. Modifications to Accommodate Short Schedules • Conducting this project as a design-build eliminated the costs of a pre-design EE/CA, saving an estimated $75,000 • Use of real-time chemical testing via XRF allowed for cap-in-place and consolidation cell dual system and laboratory cost savings totaling more than $25,000 and weeks in schedule delays Franz Campero, PhD, PE US Forest Services - Four Oaks Mine Non-Time-Critical Removal Action Sequoia National Forest, Kern Co, CA
  13. 13. Modifications to Allow for Innovation and Challenging Access • DB allowed for in-field design and modifications to maximize the effectiveness of the intended solution • Approach saved an estimated $100,000 by eliminating the need to construct and destroy access roads for heavy equipment • Approach also minimized impacts to local vegetation Franz Campero, PhD, PE US Forest Services - Alpha Diggings Hydraulic Mine Non-Time-Critical Removal Action Tahoe National Forest, Nevada Co, CA
  14. 14. Modifications to Accommodate Unforeseen Conditions • DB allowed for in-field design and modifications to include an increase of tailings volume uncovered during excavation of more than 200% at no additional cost • To accommodate the additional volume, the DB team raised the cap elevations and adjusted the drainage trench configuration • Approach also saved an estimated four weeks of increased schedule Franz Campero, PhD, PE US Forest Services - Williams Brothers Mine Removal Action Sierra National Forest, Mariposa Co, CA
  15. 15. Modifications to Minimize Environmental Impact • DB allowed for in-field design and modifications to maximize the effectiveness of the intended solution US Forest Services - Union Zaar Mine Non-Time Critical Removal Action Sierra National Forest, Del Norte Co, CA Franz Campero, PhD, PE
  16. 16. Modifications to Reduce Construction Costs • DB team modified original consolidation cell approach and specifications to utilize local borrow site (savings of more than $100,000) • Use of real-time chemical testing via XRF to save an estimated $15,000 in sample shipping, handling and laboratory costs, and weeks in schedule delays Franz Campero, PhD, PE Bureau of Land Management – Ruth Mine CERCLA Remedial Action Ridgecrest, Kern Co, CA
  17. 17. Modifications to Minimize Environmental Impact • DB team evaluated options for beneficial reuse of on-site coal waste • Selected approach included disposition of the coal waste to a local coal mine, saving the owner $170,000 • Hydraulic modeling and runoff analysis resulted in an optimized restoration system of integrated check dams and stream restoration features Franz Campero, PhD, PE Utah Department of Natural Resources, Pondtown Coal Mine Reclamation Project Carbon Co, UT
  18. 18. Questions? Thank You! Franz Campero, PhD, PE, MBA, DIC

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