Cost Estimating Guide for Road Construction USDA FOREST SERVICE NORTHERN REGION ENGINEERING Published September 8, 2020 PART I. CONTENTS PART II. DIVISION 100 - GENERAL REQUIREMENTS ................................................................................ 7 GENERAL INFORMATION AND INSTRUCTIONS ......................................................................................... 7 ENGINEER'S ESTIMATE ............................................................................................................................ 12 Table 1. Location Adjustment Factor for Public Works Davis-Bacon Zones ....................................... 13 TIMBER SALE PURCHASER WAGE RATE ADJUSTMENTS. ........................................................................ 14 Table 2. Labor Percentages ................................................................................................................. 15 Table 3. Adjustment Factor for Construction Wage Rate Differentials .............................................. 16 PART III. DIVISION 150 PROJECT REQUIREMENTS ................................................................................. 17 Section 151. - MOBILIZATION ................................................................................................................. 17 Section 152. - CONSTRUCTION SURVEY AND STAKING .......................................................................... 18 Table 4. Base cost for P-line surveys ................................................................................................... 18 Table 5. P-line survey base cost adjustment factors........................................................................... 18 Table 6. Base cost for new construction and major reconstruction staking ...................................... 19 Table 7. P-line staking base cost adjustment factors .......................................................................... 19 Table 8. Wages and Per Diem for Surveying ....................................................................................... 20 Section 153. - CONTRACTOR QUALITY CONTROL ................................................................................... 20 Section 154. - CONTRACTOR SAMPLING AND TESTING .......................................................................... 21 Table 9. Project Field Sampling and Testing - Labor Cost ................................................................... 21 Table 10. Project Field Sampling and Testing – Test Method Cost ..................................................... 22 Section 156. - PUBLIC TRAFFIC ................................................................................................................ 24 Table 11. Adjustment Factor for Traffic Control ................................................................................. 24 Section 157. - SOIL EROSION AND SEDIMENT CONTROL ........................................................................ 26 Table 12. Costs and Percent Labor Associated With Soil Erosion and Water Pollution Control ........ 27 Section 158. – WATERING FOR DUST CONTROL ..................................................................................... 29 Table 13. Fixed Haul Cost ($/M Gallon and $/Ton) for a 3500 Gallon Water Truck in Idaho and Montana .............................................................................................................................................. 29 Table 14. Variable Haul Cost ($/M Gallons-Mile and $/Ton-Mile) for a 3500 Gallon Water Truck in Idaho and Montana............................................................................................................................. 29 PART IV. DIVISION 200 EARTHWORK ..................................................................................................... 31 Section 201. - CLEARING AND GRUBBING .............................................................................................. 31 Figure 1. Clearing and Grubbing Base Rate - Idaho R/W Timber to Timber Sale Purchaser ($/Acre) 32 Figure 2. Clearing and Grubbing Base Rate – Montana R/W Timber to Timber Sale Purchaser ($/Acre) ............................................................................................................................................... 33 DIVISION 100 - GENERAL REQUIREMENTS - Page 1 of 122Published 9/8/2020 3:44 PM Figure 3. Clearing and Grubbing Base Rate– Idaho R/W Timber to Government or Cooperator ($/Acre) ............................................................................................................................................... 34 Figure 4. Clearing and Grubbing Base Rate – Montana R/W Timber to Government or Cooperator ($/Acre) ............................................................................................................................................... 35 Figure 5. Equivalent Volume Using Average Diameters and Stem Spacing ........................................ 36 Table 15. Adjustment Factor for Percent Ground Slope ..................................................................... 37 Table 16. Adjustment Factor for Slash Treatment Method ................................................................ 37 Table 17. Adjustment Factor for Slash Treatment of Tops & Limbs, Logs, and Stumps ..................... 38 Table 18. Adjustment Factor for Additional Clearing Features .......................................................... 39 Table 19. Idaho Clearing & Grubbing $/Mile with Back Slope 3/4:1 .................................................. 41 Table 20. Montana Clearing & Grubbing $/Mile with Back Slope 3/4:1 ............................................. 42 Table 21. Idaho Clearing and Grubbing Cost per Mile with Back Slope 1:1 ........................................ 44 Table 22. Montana Clearing and Grubbing Cost per Mile with Back Slope 1:1 .................................. 46 Section 202. - ADDITIONAL CLEARING AND GRUBBING ......................................................................... 48 Table 23. Base Costs for Clearing and Grubbing Existing Roads ......................................................... 49 Section 203. - REMOVAL OF STRUCTURES AND OBSTRUCTIONS ........................................................... 49 Section 204. - EXCAVATION AND EMBANKMENT ................................................................................... 50 Table 24. Conservation of Top Soil ($/STA) ........................................................................................ 50 Table 25. Material Adjustment Factor ................................................................................................ 51 Table 26. Loading Material into Trucks ($/CY) .................................................................................... 51 Table 27. Scarifying ($/STA) ................................................................................................................ 52 Table 28. Adjustment Factor for Bench Fill Slope ............................................................................... 52 Table 29. Adjustment Factor for Compaction Placement Method ..................................................... 52 Table 30. Costs for Compaction Prior to Aggregate Base and Surfacing ............................................ 52 Table 31. Shaping and Finishing - Single Lane Roads without Ditch ($/STA) ...................................... 53 Table 32. Shaping and Finishing - Double Lane Roads without Ditch ($/STA) .................................... 53 Table 33. Shaping and Finishing - Single Lane Roads with Ditch ($/STA) ........................................... 53 Table 34. Shaping and Finishing - Double Lane Roads with Ditch ($/STA) ......................................... 53 Table 35. Average Roundtrip Travel Speeds Based on Road Characteristics ..................................... 58 Table 36. Fixed Cost per Cubic Yard and Ton for Idaho and Montana ............................................... 58 Table 37. Variable Haul Cost ($/Cubic Yard-Mile and $/Ton-Mile) by Truck Type for Idaho And Montana .............................................................................................................................................. 59 Section 208. - STRUCTURE EXCAVATION AND BACKFILL FOR SELECTED MAJOR STRUCTURES ............. 60 Section 209. - STRUCTURE EXCAVATION AND BACKFILL ........................................................................ 60 DIVISION 100 - GENERAL REQUIREMENTS - Page 2 of 122Published 9/8/2020 3:44 PM Section 211. - ROADWAY OBLITERATION ............................................................................................... 60 Table 38. Range of Costs per Mile by Closure Device and Mitigation Treatment for Road Obliteration ......................................................................................................................................... 60 Section 212. - LINEAR GRADING ............................................................................................................. 61 Table 39. Adjustment Factor for Additional Excavation Features ...................................................... 62 Table 40. Idaho Base Excavation $/Mile for Linear Grading ............................................................... 64 Table 41. Montana Base Excavation $/Mile for Linear Grading ......................................................... 65 Table 42. Idaho Base Excavation $/Mile for Road Widening with Linear Grading, ¾:1 cut slope ...... 65 Table 43. Idaho