AMENDMENT 0002: Updated Base Contract Specifications; Bid Due Date Extended to 9AM CDT, August 15th; AMENDMENT 0001: Adding Government Responses to Vendor Questions; VENDORS MUST REGISTER AND LOG INTO PIEE SOLICITATION MODULE TO VIEW FULL DESCRIPTION OF THE REQUIREMENT AS WELL AS SUBMIT BID. Operation and Maintenance Dredging IDIQ: Furnishing all plant, labor, operators, supervision, equipment, transportation, supplies and material, and incidentals to satisfactorily perform and provide dredging functions. Primary work areas f or this indefinite quantity contract of Carlyle Lake located in IL; Kaskaskia Navigation Channel River Mile 0-36; Mississippi River Channel River Mile 0-300; and the Illinois River Navigational Channel River Mile 0-80.15. Secondary work areas for dredging requirements may also be required to be performed on other various tributaries, rivers, and reservoirs within the St. Louis District Area of Responsibility