This document discusses two projects involving narrow pavement widening conducted by the San Angelo District. The first project details an in-house method developed using a road widener attachment and conveyor system to widen roads by 2-3 feet at a cost of $2000 and production rate of 0.5 miles per day. The second project discusses the widening of RM 336 from 18-20 feet to 21 feet using a Roadtec milling machine to remove material and widen the road. The RM 336 project cost $145,000 per mile to complete.

1. San Angelo
District
Experience
Project 0-6748:
Narrow Pavement Widening

2. Overview
•Maintenance Experience
•Construction Projects
2

3. San Angelo District

4. Energy Sector

5. Energy Sector

6. Edge Drop Offs

7. Edge Drop Offs

8. Traditional Method

9. Scope of Work
W = 2 – 3 ft
D = 6 – 8 in
TY A LRA
(Black Base)

10. Bonnell Road Widener
Cost = $2000

11. Road Widener

12. In-House Device

13. Road Widener

14. Road Widener

15. In-House Device

16. In-House Device

17. Belly Dump

18. Side Discharge Conveyor

19. Side Discharge Conveyor

20. Side Discharge Conveyor

21. Side Discharge Conveyor

22. Level Material

23. Compaction

24. Compaction

25. Compaction

26. Compaction

27. Finished Product

28. Finished Product

29. Maintenance Experience
•Material Cost: $20,000 / Lane Mile
•Production: ½ Lane Mile / Day

30. Construction Project

31. Project STP 2012(456) HRR, ETC.
CSJ: 0554-01-031, ETC.
Highway: RM 336, ETC.
County: Real
Length: 24.673 mi
Cost: $3,573,173.63
Area Engineer: R. Lewis Nowlin, P.E.
Contractor: Allen Keller Company

32. Limited Work Area

33. Limited Work Area

34. Existing: 18 ft to 20 ft Wide

35. Scope of Work: Add 3’ w/ 6:1 Base Taper
3 ft

36. ROADTEC RX-600e

37. Step 1: Mark Cut Line

38. Step 2: Mark Cross Slope

39. Step 3: Blade Existing Grass Off

40. Step4: RemoveExistingMaterial6” Deep
and 6.5’ Wide

41. ROADTEC Miller in Operation

44. Provides Clean Cut

45. Mills Through Existing Rock

46. Mills Through Existing Rock

47. Step 5: Haul Off ExcavatedMaterial

48. Step 6: Compact Existing Subgrade

49. Step 7: Dump Pre-Wet Flexbase

50. Step 8: Process Flexbase

51. Step 9: Prime with RC-250 Asphalt
and Gr 5 Aggregate
Overlap joint 6 in
Prime front slope

52. RemainingWork: PlaceFinal SealCoat

53. RemainingWork: PlaceFinal SealCoat

54. ProjectSTP 2012(456)HRR, ETC.
Project Cost: $145,000 / Mile