The total value of the contract can be estimated by adding up the total costs of all the items awarded to each vendor. Based on the bid documents, the total cost for Civic Bridges is $106,886 + $140,088 + $194,040 + $419,316 = $860,330. For Brent Material Company, the total cost is $106,392 + $139,438 + $270,120 + $146,580 + $194,760 + $420,828 = $1,378,018. For Ferguson Enterprises LLC, the total cost is $2,935.92. For Raritan Group, Inc., the total cost is $106,886 + $140,088 + $271,400 + $125,955 + $147,270 + $124,234 + $193,956 + $419,136 + $5,250 = $1,524,075. Therefore, the total estimated value of the contract is $860,330 + $1,378,018 + $2,935.92 + $1,524,075 = $3,765,358.92.