The correct answer is C. The soil survey, traffic survey, concept design and approximate cost.
A preliminary project report is a document that is prepared to assess the feasibility of a proposed project. It includes a description of the project, its objectives, its scope, its schedule, its budget, and its risks. The report also includes a discussion of the alternatives that have been considered and the reasons for selecting the preferred alternative.
The soil survey is a study of the soil conditions in the area where the project will be built. The traffic survey is a study of the traffic patterns in the area where the project will be built. The concept design is a preliminary sketch of the project. The approximate cost is an estimate of the cost of the project.
The contract documents for inviting tenders are not included in a preliminary project report. These documents are prepared after the project has been approved and are used to invite bids from contractors.
Here is a brief explanation of each option:
- A. The detailed estimated cost based on detailed design. This is not included in a preliminary project report because the detailed design has not yet been completed.
- B. The several alternatives of the project that have been considered. This is included in a preliminary project report because it is important to consider all of the alternatives before selecting the preferred alternative.
- C. The soil survey, traffic survey, concept design and approximate cost. This is included in a preliminary project report because it is important to have this information before making a decision about whether or not to proceed with the project.
- D. The contract documents for inviting tenders. This is not included in a preliminary project report because the contract documents are prepared after the project has been approved and are used to invite bids from contractors.