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6.7 Project Cost Estimate
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6.7 Project Cost Estimate

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Once the FSR is completed, a more detailed cost estimate should be prepared. The cost estimate should include the construction costs, costs for final engineering and design, project management and supervision, project startup and commissioning and an initial operating period (such as an 18-month period) prior to transferring the project to the local village, if design-build-operate (DBO) approach is applied (procurement alternatives refer to Section 9.2).

 

The final cost estimate should be prepared by a cost engineer and should conform to national standards for preparing a Bill of Goods. The final cost estimate should utilize current unit costs reflecting actual costs in the region where the project will be constructed.

 

  • Construction Costs. The construction costs should include material, equipment, labor, and contractor markup and profit. The construction costs may include ancillary costs, such as transportation of materials, setting up of temporary housing and per diem for laborers (if the project is in a remote location and requires an external source of labor), rental space to store materials, and other foreseeable costs. At this stage a 10 to 15% contingency costs should be added to the construction costs to provide some additional funds that may be required to cover unforeseen costs that are common to infrastructure projects.

 

  • Engineering Costs. The fees for preparing the final engineering design plans should be included in the final costs estimate. These costs should include the professional fees, the reproduction costs of the final plans, and other foreseeable costs.

 

  • Project Management and Supervision. The cost estimate should include costs for the overall project management and supervision of the project and the costs for coordinating, attending and documenting construction meetings, preparation of requests for information (RFIs) by the construction contractor, preparation of supplemental information (SIs) for the construction contractor, and assisting with the startup and commissioning of the new wastewater facility.

 

  • Project Startup Period. An initial startup may be included in the project, such as an 18-month startup and training period. During this period of time a professional contractor may be retained by the Municipality or County wastewater management program to assist the village to operate and maintain the new project. The costs for these services should be included in the final cost estimate. Additional monthly and annual costs for electricity, pumping and disposal of sludge and potential other costs should be included in the final cost estimate.

 

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