The selected firms shall perform Geotechnical Investigation for INDOT Projects which include foundation design for roadways, bridges, retaining structures, pavements, landslide corrections, and construction supervision on some projects at various locations throughout the State in accordance with Appendix A and D of the INDOT Geotechnical Manual. All On-Call contract services are on an as-needed basis and there is a possibility that no assignments will be made. The selected consultant's fee proposal shall be due 15 calendar days after the selection date for this RFP item. 8 geotechnical consultants will be selected for the various contract amounted based upon selection ranking: Firms ranked 1 through 4= $3,000,000.00 Firms ranked 5 through 8= $2,000,000.00. These contracts will utilize INDOT`s eInvoice application.