Specifications include, but are not limited to: The construction of box culverts, box bridges, pre-cast bridge structures, and rental of road equipment, and other miscellaneous items needed in the repair of county roads and bridges and any ditches, erosion control, or drainage work necessary to protect the work in Grenada County, Mississippi. The principal items of work will be paid for at the contract price bid per item, complete and accepted, which price shall be full compensation for mobilizing, removal of existing structure, excavation incidental to construction, furnishing all materials and testing in accordance with State Aid and other agencies specification, loading, hauling, uploading and placing and for all labor, equipment, tools and incidentals necessary to complete the work. All existing structures removed in the course of work, if not used in re-construction, are and shall be the sole property of the contractor and shall be removed and disposed of by the contractor at his expense.