Bids Are Invited For Hiring Of Specialized Company(S) For The Installment Supply Of Natural Gravel, With Extraction, Loading, Transportation And Delivery, Intended For The Recovery, Maintenance, Conservation And Improvement Of The Traffic Conditions Of Unpaved Urban Roads In The Headquarters Of The Municipality Of Humaitá Am, The District Of Reality And Local Roads In The Rural Area, According To Specifications Contained In The Terms Of Reference, For The Purposes Of The Price Registration System Auxiliary Procedure - Srp, Aiming Eventual Hiring On Demand, According To The Needs Of The Municipal Administration.