Paradise Bay Estates Transportation Upgrade Study and Conceptual Plans

1. Paradise Bay Estates Transportation Upgrade Study and Conceptual Plans

2. Team Members • Paul Creasey • Project Manager • Jason Goble • Project Engineer • Brian Voll • Project Engineer • Phil Sundling • Project Engineer

3. Overview • Project Description • Design Requirements • Project Approach • Design Solution • Summary • Questions

4. Project Description • Background • Residential Subdivision • Built in 1985 • Insufficient time designing infrastructure • 2.6 miles of winding gravel roadway • Heavily wooded • 43 houses • 113 total lots

5. Project Description • Situation • Roadway • 3-5” crushed stone gravel base • 1/8” to 1/2” wearing surface • Varying widths from 10’ to 20’ • Degradation • Washouts during rain events • Constant source of maintenance • Potential hazard to residents • Insufficient drainage

6. Project Description • Existing Conditions • Drainage Issues • Undersized • Improperly conveyed off roads and lots • Roadway Issues • Gravel is continuous maintenance problem • Gravel thickness not sufficient

7. Design Requirements • Design of a low-maintenance road • Analysis of flood prone region • Drainage infrastructure upgrades • Timeline for phased implementation • Construction cost estimates • Life cycle analysis

8. Project Approach • Initial Site Assessment • Hydrologic and Hydraulic Study • Drainage Design • Roadway Design • Life Cycle Analysis

9. Initial Site Assessment • Preliminary Feasibility Study • Impediments • Floodplain • Special Considerations • None

10. Initial Site Assessment • Codes and Regulations • Federal, State, County • AASHTO, INDOT, USACE, IDNRDOW, IDEM

11. Initial Site Assessment • Existing Conditions • Geotechnical Report from Alt & Witzig • 14 soil borings and also soil samples • Soils types – brown and grey silts and clays – low strength • Recommendations • Strengthening base material • Adequate side ditches • Culverts • Underdrains • Remove unsuitable soils and replace with ‘B’ barrow

12. Project Approach • Initial Site Assessment • Hydrologic and Hydraulic Study • Drainage Design • Roadway Design • Life Cycle Analysis

13. Flood Prone Region • Location • High Risk • Only Exit • Immediate Solution

14. Flood Prone Region • Existing Conditions • Roadway raised 10ft. along a 400ft. wide valley • Washouts occur several times a year • One 54” CMP currently in place 54” CMP

15. Hydrologic and Hydraulic Study • Purpose • Design proper elevation of roadway and structure opening • Results

16. Hydrologic and Hydraulic Study • Results • USACE 100yr. flood elevation • 690 ft. • Upstream conveyance

17. Hydrologic and Hydraulic Study • CON/SPAN by Contech Solutions Inc. • 12’ x 12’ span • Modular precast system • Raise roadway elevation • 692 ft. • 2 ft. above 100-year storm event

18. Scour Analysis • Purpose • Determine the susceptibility of scour at the structure opening • Required Data • Channel Geometry • Bed materials • Characteristics • Level 1 Analysis

19. Scour Analysis • Results • Type E4 Stream • Scour minimal at project site

20. Project Approach • Initial Site Assessment • Hydrologic and Hydraulic Study • Drainage Design • Roadway Design • Life Cycle Analysis

21. Drainage Design • Flow Calculations • Rational Equation • Division of Areas

22. Drainage Design • Division of Areas • 1 through 5

28. Drainage Design • Roadside Ditches • V-Shaped Channels • Sizing • Grass Lining

29. Drainage Design • Culverts • Sizing • INDOT Method • Placement

30. Erosion Control • Construction Measures • Sediment Fence • Slope Stabilization • Riprap • Permanent Seeding • Drainage Erosion Controls

31. Project Approach • Initial Site Assessment • Hydrologic and Hydraulic Study • Drainage Design • Roadway Design • Life Cycle Analysis

32. Roadway Design • Design Options • Construction Material Options • Hot-Mix Asphalt • Concrete • Gravel • Oil-Sealed Gravel

33. Roadway Design • Assessment of Design Options • Criteria Assessed by Client

34. Roadway Design • Decision Matrix • HMA is our recommendation • Oil-sealed gravel is insufficient – engineering judgment

35. Roadway Design • Assessment of traffic loads • Parke County specifications • Possibly turn the road over to the county • Too costly • Design speed selected • 15 mph • Signage and marking design • Plans and Specifications

36. Project Approach • Initial Site Assessment • Hydrological and Hydraulic Study • Drainage Design • Roadway Design • Life Cycle Analysis

37. Maintenance Plan • Roadway • Operations for Asphalt • De-icing / Snow removal • Asphalt sealing and patching • Resurfacing • Operations for Gravel • De-icing / Snow removal • Re-grading • Material addition • Covers the entire lifespan of the roadway

38. Maintenance Plan • Drainage • Operations • Culvert inlet clearing • Culvert replacement • Mowing and brush clearing

39. Maintenance Costs • Total Maintenance Costs Including Drainage • Asphalt • $21,400 per year • Gravel • $41,400 per year • $20,000 advantage for asphalt

40. Construction Costs • Roadway Cost Estimate • Materials • Hot mix asphalt, gravel, subgrade • Labor and Equipment • 2007 RS Means Heavy Construction Cost Data Manual • Drainage • Roadway • Highly conservative

41. Construction Costs • Drainage • Excavation, hauling • Culverts • Backfilling • Rip Rap • Con/Span • Installation • Total Cost - $222,000

42. Construction Costs • Roadway • Asphalt - $830,000 • 8” Base Aggregate • 4” Asphalt Binder • 1.5” Asphalt Surface • Gravel - $644,000 • 9” Surface Aggregate • 8” Base Aggregate

43. Construction Costs • Total Costs Including Drainage • Asphalt • $1,050,000 • Gravel • $865,000 • NOTE: costs do not include overhead & profit • Can range from 10-20% of total project cost

44. Economic Analysis • INDOT Guided Analysis • Interest Rate = 4% • Roadway Life = 40 years • Performed an (A/P, 40, 4%) analysis to find the annual costs if project were accepted • Roadway, drainage infrastructure, major overhaul, maintenance ALL included

45. Economic Analysis • Asphalt Roadway • $71,500 per year • Gravel Roadway • $71,700 per year • Paradise Bay Current Budget - $45,000

46. Phased Implementation Plan • Not enough funding • 1.) Break up entire project (recommended) • Drainage first, then roadway future • May autonomously fix the roadway • $52,600 per year using economic analysis • Almost guaranteed to lower the annual maintenance costs for the roadway

47. Phased Implementation Plan • Not enough funding • 2.) Partial roadway construction • Improve the main roadways • May cause uproar in the community • Highly political • Costs can vary significantly, depending on which parts of the roadway are done

48. Future Work • Decide what to do: • Vote on what people want • Perform economic analysis • Professional engineering review • Request bids for the project • Perform actual construction

49. Summary • Our ultimate goal • To BETTER the conditions at Paradise Bay • Thank you very much for your time! • Questions or comments? • Email – sundlipa@rose-hulman.edu