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Loudoun Water’s Potomac Water Supply Program

Loudoun Water’s Potomac Water Supply Program. RWT - Pre-Bid Meeting December 18, 2013. AGENDA. Introduction Bidding Overview Bid Documents, Supplementary Conditions, Permits, Bid Form Overview- RWT Design

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Loudoun Water’s Potomac Water Supply Program

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  1. Loudoun Water’s Potomac Water Supply Program RWT - Pre-Bid Meeting December 18, 2013

  2. AGENDA • Introduction • Bidding Overview • Bid Documents, Supplementary Conditions, Permits, Bid Form • Overview- RWT Design • RWT Main, North and South Alignments, Site Conditions & Geotechnical, Quarry Bypass Vault, DVP Easements, Cathodic Protection • Questions/Answer Period • Close Statements made or material presented at Pre-Bid Conference shall not modify or amend the Contract Documents. Any amendments shall only be by written Addenda.

  3. INTRODUCTORY REMARKS • DATES • SIGN IN SHEET • QUESTIONS DURING BID PROCESS • ADDENDUM

  4. The Potomac Water Supply Map

  5. Mid-year 2016 RWI/RWPS Substantial Completion January /February 2014 RWI/RWPS NTP Anticipated Program Construction Schedule May 2014 RWT NTP December 2015 RWT Substantial Completion Phase 1 March/April 2014 WTP NTP April 2017 Final Completion All Program Elements, Including Phase 1/2 of RWT

  6. Bidding Overview

  7. Bidding Overview - Highlights • Bidding Documents • Supplementary Conditions • Working Hours – Articles 6.02.B and 18.01.A • Exhibits A, B, C, and F • Securing final easements – reference paragraph 4.05 of Instructions to Bidders for information on Site Inspections • ESA Phase 1 pertains to removal of shed on Starland, parcel 151-46-8133, Drawing sheet T-I-C43

  8. Bidding Overview – Highlights Permits/Approvals Obtained Permits/Approvals in Agency Review • Columbia Gas – final approval will be secured prior to NTP • DTI – by addendum will add DTI Encroachment and Construction Guidelines that are referenced in approval letter within Exhibit C – final approval will be secured prior to NTP • JPA Minor Modification – related specification will be provided with first addendum • VDH – permit will be combined into one for all three Program Elements • DVP • NVRPA • DEQ/VSMP – VAR 10 & SWPPP • JPA – Major Modification Executed Agreements and associated exhibits will be provided by addenda. SWPPP will be available at Pre-Construction Meeting *Contractor to obtain VDOT and Grading Permit and all other required construction permits per Article 6.08.A of the Supplementary Conditions

  9. Bidding Overview - Highlights Bid Form • Encourage development of Bid for Welded Steel and DIP • Submit only lowest Bid • Complete all blanks, including Contingent Contract Items • Contingent Contract Items • Reduction in Estimated Quantities • Phase 1 and Phase 2 Work • Or Equal and Substitutions, Article 11, Section 00200, Instructions to Bidders • Bid = Sum of Items • Submit Bid Form, Bid Bond, Proof of Pre-Qualification

  10. RWT Design Overview

  11. Raw Water Transmission (RWT) Main Overview • Slide shows overview • Detailed description is provided within the Project Manual and the Contract Drawings • Overall Work includes a North and South Alignment • Staging Areas provided throughout and shown on Contract Drawings Contract Interface Point Potomac River PRWPS (By Others) RWT Quarry ‘A’ QBV QARWPS (By Others) Contract Interface Point WTP (By Others)

  12. North Alignment • Mostly Residential • All Trenchless Crossings Occur in This Section • DVP Easement / High-Tension Lines • DVP Tower Foundation Protection • Town of Leesburg Force Main Protection • VDOT Coordination at Riverside Pkwy & River Creek Pkwy • No Blasting from Route 7 and North to Potomac River Potomac River PRWPS North Alignment Quarry ‘A’ QBV QARWPS (Future) South Alignment WTP

  13. Construction in and around DVP Easements

  14. North Alignment • Groundwater at Tuscarora Creek and Sycolin Creek Trenchless Crossings • Transitions from 42” to 48” Diameter Pipe • Two Tees for Future Quarry Connection • W&OD Trail and Luck Stone Berm • Construction Limits: 40 to 50 Feet (Most Areas) • Multiple Staging Areas Potomac River PRWPS North Alignment Quarry ‘A’ QBV QARWPS (Future) South Alignment WTP

  15. Quarry By-Pass Vault • Approximately 32’ x 18’ x 11’ (Deep) inside (See T-1-M1 & M2) • Top of Structure Buried • Valves • 5 Butterfly Valves • 1 Check Valve • Pre-Blasting of Future Vault Potomac River PRWPS North Alignment Quarry ‘A’ QBV QARWPS (Future) South Alignment WTP

  16. Quarry Bypass Vault

  17. South Alignment • Extensive Clearing Required • Rock Blasting Expected (Submit Blasting Plan Prior to Blasting) • Parallel Trench Throughout • Provide Pre-Blasting for Future Pipeline • Submit Blasting Plan • Access Road Re-Grading for Cross-Slope • Multiple Double-Barrel Culverts • Temporary Access Roads • Quarry ‘A’ Tunnel Construction may be ongoing by Luck Stone Potomac River PRWPS North Alignment Quarry ‘A’ QBV QARWPS (Future) South Alignment WTP

  18. South Alignment • Goose Creek Conservation Easement • 50-Foot Set-back Requirement (Zoning) • Limits of Construction: 50 Feet Wide Throughout • Multiple Pipe Staging Areas • MSHA and DMM certification for all staff working on Luck Stone Property Potomac River PRWPS North Alignment Quarry ‘A’ QBV QARWPS (Future) South Alignment WTP

  19. Site Conditions and Geotechnical • Geotechnical Baseline Report – Provides further details on 12 Trenchless Crossings • Geotechnical Data Report – not part of Contract Documents but available for review • Phase 1 ESA for Starland LLC pole-barn to be demolished (see Supplementary Conditions, Attachment F and Specification Section 02110)

  20. Cathodic Protection System • AC Isolation Mats • Insulated Casing Spacers • Casing End Seals • Isolation Flanges • Special Requirements for Colonial Gas Mains (see Detail CC-7, Drawing T-1-E11) • NACE Certified Cathodic Protection and Corrosion Specialists Required of Contractor (See Specification Section 16640) • All Piping (DIP or WSP) • Exterior Bonded Coating Required • Magnesium and Zinc Ribbon Anodes • Thermite Welds • Isolation Flanges • Test Stations

  21. Construction Access Routes • See Drawing Sheets T-1-C40 thru T-1-C44 • Multiple Access Points shown • South end Access shown here (from Drawing T-1-C44)

  22. Contractor’s Trailer / Parking Area • See Specification Section 01500 for 70’x145’ Area

  23. Other Noteworthy Items • Partnering Sessions per Section 01112 to promote an open, communicative relationship. • Coordination with other Contractors on other Program Elements (RWI, PRWPS, WTP, SCADA) as well as at Luck Stone • Other Limitations and Constraints per Specification Section 01140 and as elsewhere indicated • Training provided on Owner’s Construction Management Software System (CMSS, e-Builder)--See Specification Section 01305 • Functional and Performance Testing per Specification Section 01655 (2 Phases)

  24. Presentation of the latest renderings Questions?

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