F.A.U. Route  7158, Mattis Avenue Over F.A.I. 57

The project involves the total replacement of the existing structure. The existing structure consists of a 4-span rolled steel beam superstructure with a reinforced concrete deck with open stub abutments on concrete piles, and multi-column reinforced concrete piers supported on spread footings. The existing structure is 332’-4″ back-to-back abutments and 33′-8” out-to-out deck. The proposed continuous welded steel plate girder structure on multi-column piers and integral abutments will be 360’-2” back to back abutments, 54’-10” out to out, with a 45° skew. Stage construction will be required to maintain one lane of traffic during stage I by utilizing a portion of the existing structure and then maintain one lane of traffic during Stage II on the Stage I part of the proposed structure. Adequacy of the existing and new structures during stage construction will be verified. In the event that the existing structure is determined to be inadequate for Stage I traffic, the structure will either be posted, or repair plans will be provided, depending on what is required. Due to spans exceeding 150 ft., the positive and negative moments shall be poured separately per IDOT Bridge Manual Sec. 3.2.8. Mandatory transverse construction joints will be specified along with a deck pouring sequence. Temporary Sheet Piling will be designated and detailed according to the 2012 IDOT Bridge Manual. Temporary Soil Retention system will be designated and detailed for the pier construction sequence. Temporary support system will be required of pier cap will be required prior to Stage I removal of the pier.