| Title | Iowa Demonstration Project: Massena IA-92 Bridge Replacement Project |
|---|---|
| Record ID | 78892 |
| Personal Name Creator |
Raghunathan, Deepak; Sadasivam, Suri; Mallela, Jagannath |
| Corporate Creator | Applied Research Associates, Inc. |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure |
| Publisher | United States. Federal Highway Administration |
| Publication Date | 20141001 |
| Language | English |
| Abstract | As part of a national initiative sponsored by the Federal Highway Administration under the Highways for LIFE program, the Iowa Department of Transportation (DOT) was awarded a $400,000 grant to demonstrate the use of proven, innovative technologies, including lateral bridge slide and prefabricated bridge element systems (PBES), to deliver this $2.0 million project in less time and with less impact to motorists than conventional construction. The project consisted of replacing the Iowa Highway 92 bridge (Maint. No 1563.4S092) over a small natural stream, 1 mile west of Iowa Highway 148. The replacement bridge was designed to increase the structural capacity of the bridge, improve roadway conditions, and enhance user safety by providing a wider bridge and approaching roadway. This project focused on implementation of an accelerated bridge construction (ABC) policy and first-time use of the demonstrated innovative construction methods. This was the first lateral bridge slide project in the State of Iowa. The project was let on April 16, 2013 using a design-bid-build contract, and the winning bid amount was $1.3 million. The project involved three phases: 1) construction of the bridge structure off-alignment, 2) the bridge slide-in, and 3) revetment, grading, and clean-up. The replacement structure was a single-span 120-foot by 44-foot bridge with cast-in-place abutment footings, precast wingwalls, and a precast superstructure fabricated adjacent to the existing bridge and moved into position by lateral slide. The ABC approach resulted in a full closure of 9 days with no incentives or disincentives awarded to the contractor at the end of this project. A 12.89 mile detour was utilized during the full closure, thus resulting in an out-ofdistance mileage of 6.89 miles. To estimate the cost savings for the ABC method, the total costs were computed for both the as-built bridge and a baseline (cast-in-place) scenario by adding the agency costs and user costs. The results indicated a cost savings of around 43 percent over the baseline scenario, mainly attributable to the significantly reduced user costs of the asbuilt project. |
| Rosap ID | dot:54118 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/54118 |
| TRT Terms | Prefabricated bridges; Lateral supports; Bridge construction; State highways |
| Geographical Coverage |
United States; Iowa |
| TRIS Online Accession No |
1577852 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/78000/78800/78892/ia_abc_massena_ia92.pdf |
| Format | |
| Database | NTL Digital Repository |