FLH PDDM Chapter 9 - Eastern Federal Lands Highway Division

9.4.J. Engineer’s Estimate. (continued)• Section 156.— Public Traffic. The work described in this section is measured for payment under othersections of work with one exception. If a detour is constructed and maintained under a lump sum item,include the work should under this section. If there are extraordinary complications with public traffic,adjust the prices in the appropriate section to cover the work or add additional items of work in thesections.• Section 157.— Soil Erosion Control. Work under this section covers the erosion control plan for theproject. It also provides items of work necessary for the Storm Water Pollution Prevention Plan which isincluded in most construction contracts.Most projects will have several items in the bid schedule to cover this work. A very simple project wherethe erosion control features can be completely detailed on the plans and described in the Special ContractRequirements may be a lump sum item. The use of an item for Soil erosion control, using a contingentsum pay unit is not permitted. In addition to lump sum, pay units of meter, each, square meter, hectare,kilogram, hour, and other related units are acceptable.The past practice for developing erosion control is no longer adequate for today's requirements. Thecurrent emphasis is to retain all sediments within the construction limits and stabilize them in place.Evaluate every cutslope, embankment, stream crossing, or other disturbance, and determine what effortand devices are required to stop sediment from escaping beyond the construction limits. Transcribe thisevaluation to the erosion control plan. If a stage construction concept is being considered, evaluate eachstage of the work to arrive at an adequate erosion control plan.Consider the items in the FP as a good beginning for erosion control devices. Do not hesitate to proposeadditional methods of controlling erosion and sedimentation. Not all temporary and permanent erosioncontrol features need to be addressed under Section 157. They can be incorporated into other sections ofwork if it is more appropriate.c. Division 200 Earthwork• Section 201.— Clearing and Grubbing. The design program computes quantities for clearing andgrubbing and provides subtotals as desired by sheet total, or 350 meter intervals or as user defined. Thesesubtotals are placed on the profile part of the plans or on a separate tabulation of quantities to the nearest0.01 hectares. It may be necessary to round the subtotals so the total shown on the plans equals the designprogram output. Compute the acreage of any isolated areas and road approaches of significant size ormeasure the areas by planimeter. Show this quantity on the plans with the mainline roadway quantitiesusing an appropriate note.On the supporting data sheet, show the design program total plus any manually computed hectares. Thetotal of these hectares is the plan quantity shown on the Summary of Quantities sheet of the plans. Addan allowance so the bid schedule quantity reflects the next tenth of a hectare. If there is a large numberof hectares, rounding up more than a tenth of a hectare is appropriate. If lump sum is used as a payment,show the number of hectares used for the lump sum calculations on the Summary of Quantities sheet orother plan sheet.9 - 133