Big Challenge, Big Success

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Big Challenge, Big Success

  1. 1. I. Existing ConditionsII. Who Is ImpactedIII. The Challenge – Satisfy Everyone!IV. ConstructionV. SummaryVI. Questions
  2. 2. – Built in 1934, Posted for 17 tons– Jack arch structure with concrete and steel deterioration– Insufficient bridge width for use • Vehicles, pedestrians, snowmobiles • Existing rail-to-rail – 26’; Proposed Width – 34’
  3. 3. – Abutment footing undermining– Asbestos paint on girders and railings– Poor drainage– No record plans for bridge
  4. 4. – Subsurface Conditions – Sand– Locate septic systems– New Deck at Restaurant - installed prior to construction
  5. 5. Project Influences Community• Businesses Agencies• Residences • Funding• Schedule Project • Permitting • Utilities• Pedestrians• Recreational vehicles
  6. 6. • Funding – FHWA, NYSDOT and County• Utility Companies – National Grid, Frontier, Time Warner Cable, Turkey Water Works (Local Water) – all relocated• Permitting – NYSDOT, APA, NYSDEC and USACE
  7. 7. • Adjacent Private Residences – Driveways, septic systems• Adjacent Business owners – Need to stay open during tourist season• Waterway Under Bridge• Pedestrians, Snowmobile Trail
  8. 8. CHURCH MARINA HOTEL SOUTH SHORE ROAD PRIVATE SEPTIC WELL
  9. 9. Schedule – Tourist season - July and August • Town - no construction – No Detour Route • Staged Construction – Shortened construction • Mid April to Mid September
  10. 10. Schedule – Minimize Concrete Pours • Cure time impact – Snowmobile Trail • Open December 1 to March 31
  11. 11. • Goal – Bridge open by July 4th • (Schedule April 1 to July 1) – 13 weeks???
  12. 12. • Alternatives Considered – Superstructure Replacement • Existing abutment widened • 75 year old concrete • No record plans • Cost 95% of replacement – Replacement Structure Built Under Existing • Town – no reduction to clearance of navigable waterway
  13. 13. • Alternatives Considered – Replacement w/ C.I.P. Concrete Abutments with Spread Footings • Footings below stream bed for scour prevention • Cofferdams needed – Replacement w/ Integral Abutments • Steel H-Piles • Prestressed concrete beams • Asphalt Wearing Surface
  14. 14. • Replacement with Integral Abutments – Precast saves time – Limited demolition/excavation• How can we build within constraints of schedule?
  15. 15. • Contractor and Town Now what? – Insufficient space for crane staging – Traffic Control • Too close to Route 28 – Too much time needed for staged construction
  16. 16. • Eureka!!! – Town Highway Superindendent • Existing snowmobile trail for detour route • Town owns majority of R.O.W. Time to pull out the ACE up my sleeve!
  17. 17. Piece ofCake!
  18. 18. • Build Detour in Fall before December 1• Relocate overhead utilities prior to April 1• Open Detour - April 1• Close Bridge - April 1• Open New Bridge - July 1• Project Completion - July 31
  19. 19. Design Speed - 20 MPH
  20. 20. 2 – 10 ft travel lanes
  21. 21. Detour Profile• Horizontal & Vertical close to existing • Helps keep vehicle speed down!
  22. 22. • Project completed on June 30• Project also included: – Separate C.I.P. u-wings with spread footings – 60 ft long, 8 ft high tapered C.I.P retaining wall with spread footing – Closed drainage – Thermoplastic Snowmobile Crossing
  23. 23. • Permits – APA – wetlands along detour – NYSDEC – stream restrictions for salmon spawning – USACE – waterway – NYSDOT Highway Work Permit – new drainage structure on Route 28 and construction signs
  24. 24. • Financials – Engineers Estimate: $1.4 M – Low Bid: $1.2 M – Final Construction Cost: $1.1 M
  25. 25. Thorough Planning – Construction Schedule discussed with contractor before design – Utility Agreements – relocated prior to April 1 – Bid late summer allowing contractor time to plan for spring construction – Liquidated damages provisions • Detour completion December 1 • Bridge open July 1
  26. 26. Team Effort – County – overall project management – NYSDOT – R.O.W. acquisition – Town – agreement with Marina and local public relationsPublic Involvement – Design - 2 public meetings – Construction – Town Hall meetings
  27. 27. • You can never have too much communication with your team• Don’t be afraid to talk to local people• Think outside the box• Construction schedule is VERY important!
  28. 28. 1. What is the name of the unique environmental agency involved with this project? – APA2. Who contributed to the “solution” for the project detour? – Town Highway Superintendent & Dick Payne3. What was the design speed used for the detour road? – 20 MPH
  29. 29. 4. Besides vehicles and pedestrians, what else used the bridge for a crossing? – Snowmobiles5. How many weeks did the bridge construction take? – 13 weeks6. What material was the temporary pedestrian bridge made out of? – Aluminum
  30. 30. 7. What was the existing span of the bridge? – 49 feet8. How long were the new steel h-piles? – 100 feet9. What type of abutment was used for the new bridge? – Integral
  31. 31. 10. How many liquidated damage provisions were used? – 2 (1 – detour completion , 1 – bridge opening)

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