PROJECT PROFILE D'Appolonia was retained as part of a multi-firm team to provide engineering services through the Pennsylvania DOT Central Office Bureau of Design, Bridge Quality Assurance Division un- der an open-end agreement for a period of four years. D'Appolonia’s involve- ment as a subconsultant under the agreement related to evaluation of spe- cial bridge foundations, earth retaining structures, and soil-structure interaction sy

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