P3 Rapid Bridge Replacement Project



Statewide, PennDOT

Survey Services
This project involved providing various Survey and Cadd services for the Pennsylvania Department of Transportation’s (PennDOT) public-private partnership (P3) Rapid Bridge Replacement Project (RBRP). The goal of the PennDOT’s P3 RBRP is to replace 558 aging bridges during a target period of three years. The P3 project enables PennDOT to quickly construct the bridges with the use of standardized designs and ability to prefabricate many of the bridge components off site. AEG aided with the Survey and basemapping of 56 bridges located in PennDOT Districts 3-0 and 8-0. During the survey development portion of the project, AEG performed survey of 56 bridges. Utility coordination was completed by AEG prior to field survey. Deed lookup for all properties within a minimum of 300 feet of the bridge was completed by AEG. Surveying at the bridge locations included topo collection of bridge features, abutments, wingwalls, bridge openings, roadways, lanes, shoulders, edges, joints, inlets, manholes, drainage features, in stream features including stream bottom thalweg, channel banks and areas extending to top and toe of embankment slopes. After surveying of each bridge was completed, data was processed and basemapping and a DTM were created and held to PennDOT DM3 level and symbology standards. Microstation was used to complete all data processing and mapping. Surrounding property deeds were collected and kept in a database as well as placed in property mosaic drawings. Close coordination with the survey team was required to ensure the needs of each proposed bridge locations were met for the RBRPs standards while satisfying state and local requirements. ProjectWise software was used for managing project data and collaborating with the other survey design team members. Due to the nature of the RBRP project, a quick turnaround time and dedication to timeframe deadlines was essential. Project data was uploaded to the Projectwise interface using standard naming conventions to provide organized and identifiable data for such a large scale project.

Hydrologic and Hydraulic Services
Bridge design is upheld to State H&H requirements to ensure that designs meet PennDOT and DEP criteria for flood analysis and bridge design. AEG aided with the H&H development and review of 136 bridges across the state of Pennsylvania located in PennDOT Districts 1-0, 2-0, 3-0, 5-0, 6-0, 8-0, 9-0, 10-0, 11-0, and 12-0.

During the H&H development portion of the project, AEG prepared or assisted in preparing more than 20 different H&H reports for bridges and culverts, performing GIS analysis and hydraulic modeling using HEC-GeoRAS software developed by the United States Army Corps of Engineers. Background information including base mapping of project location, site photos, hydrologic analysis and site specific stream channel material composition data was provided by the bridge project team and utilized to develop a full H&H report including temporary conditions and scour analysis for the assigned proposed bridges. Close coordination with the H&H and bridge design team was required to ensure the needs of the proposed bridge were met while satisfying state and local requirements for each specific site. ProjectWise software was used for managing project data and collaborating with the various bridge design team members. Due to the nature of the RBRP project, a quick turnaround time and dedication to timeframe deadlines was essential.

AEG was also tasked with the quality check (QC) review of 116 H&H reports and interdisciplinary reviews of corresponding plans and reports. H&H Reports in conjunction with roadway calculations, roadway plans, foundation reports and structure drawings were uploaded for review using Bluebeam Studio. A thorough check of all data provided in the H&H Report was conducted along with an interdisciplinary review of the accompanying documents for consistency. Comments were placed within the Bluebeam platform along with other disciplinary reviewers. A quick turnaround was required for both review comments and sign off of comment responses in order to meet bridge permit package deadlines set forth in the P3 agreement.