CASE STUDY Project Summary Organization: Foth Infrastructure & Environment, LLC Solution: Roads Location: Johnston, Iowa, United States Project Objective: • Widen and reconstruct nearly 1.5 miles of NW 62nd Avenue in Johnston, Iowa, to manage travel demand through 2032. Bentley Civil Software Powers Foth’s Design of Bentley InRoads First Multi-lane Roundabouts in Iowa ® Powerful tools forPractices Leverage GEOPAK Civil Engineering Suite to Foth’s Innovative the design of civil infrastructure Deliver Plans in Just Six Weeks Headquarters Expansion Fuels Traffic • Design and construct a series of four multi-lane roundabouts to improve safety, increase travel speeds, and reduce travel time and fuel consumption. DuPont Pioneer retained Foth Infrastructure & Environment, LLC, to secure funding for widening and reconstructing nearly 1.5 miles of NW 62nd Avenue in Johnston, Iowa, where the company’s world headquarters is expanding. The initiative led to design and construction of a series of four multi-lane roundabouts—the first in the state—to address challenging traffic conditions. Three key areas of innovation enabled Foth to design and deliver the USD 7 million fast-track project on schedule: interoperability of Bentley products, automation of plan preparation, and customization of inspection reporting. Products used: Bentley OnSite, Bentley View™, CulvertMaster, FlowMaster, GEOPAK Civil Engineering Suite, LEAP Bridge, MicroStation, StormCAD Foth Senior Technology Manager Blaine Buenger said, “By combining Bentley solutions with Foth’s exceptional technical staff and innovative spirit, we delivered the project to the client on time, on budget, and with advanced, sustainable electronic deliverables.” • Secure two Revitalize Iowa’s Sound Economy grants totaling USD 6.38 million in state funding. Fast Facts • Foth’s 12-member team designed and sent the project out for bid in just six weeks. • A Bentley SELECT subscription provided easy access to the product portfolio, helping with workload balancing. • Foth maximized the benefits of product interoperability by using GEOPAK in conjunction with other civil software. Fast-track Schedule Drives Design In early 2010, DuPont Pioneer announced to city and state officials that two campus expansions would create 638 new jobs, contributing to a significant increase in traffic on NW 62nd Avenue. Foth led a collaborative effort among the City of Johnston, the Johnston Economic Development Company, and DuPont Pioneer to complete two Revitalize Iowa’s Sound Economy grants and secure USD 6.38 million in state funding for improving the corridor. • Innovative plan preparation trimmed 24 days from the schedule, saving USD 23,100. Given the existing traffic characteristics and imminent congestion, Foth saw an opportunity to implement a non-traditional intersection solution. Multi-lane roundabouts improve traffic flow, reduce delays, and promote pedestrian safety while presenting a smaller carbon footprint. Because this type of roundabout was new to Iowa, Foth was challenged to demonstrate the benefits to stakeholders. MicroStation® was used extensively to prepare conceptual drawings and preliminary geometric layouts. These illustrations assisted with educating city staff, city councilmen, and key stakeholders about the benefits of the proposed solution. • The low bid of USD 7 million was 20 percent below the estimate and 0.2 percent lower than the next lowest bid. Once approved, the project was put on a fast-track schedule, making it imperative for Foth’s multi-discipline 12-member team to engage in collaborative design using optimal tools. • An automated process used 3D roadway design models to detail over 1,000 geometric and staking callouts. The firm’s Bentley SELECT® subscription benefited the geographically dispersed team by giving members easy access to Bentley’s product portfolio. Flexible licensing and Bentley LEARN® training helped with workload balancing. Bentley software streamlined design and automated repetitive tasks, facilitating a Lean Project Delivery approach that enabled Foth to meet the aggressive deadline. Typically, a project of this magnitude would take a design team of that size more than 16 weeks to finish. Foth’s team completed the design and sent the project to bid in just six weeks. Interoperability Produces Master Model GEOPAK Civil Engineering Suite offered a flexible suite of integrated tools for surveying and design of roads, sites, drainage networks, and storm and sanitary sewer systems. Foth maximized the benefits of Bentley product interoperability by using GEOPAK in conjunction with other civil software to take on the challenging scope of work. In addition to multiple multi-lane roundabouts, the corridor featured a two-lane bridge, box-culvert underpass, recreational trail, and stream realignment. GEOPAK site design tools were used to model the roundabouts, bridge berms, and stream realignment. GEOPAK’s Corridor Modeler was used to model the roadway in between roundabouts, which involved the design of pavement widening and full reconstruction, as well as recreational trails. Foth used GEOPAK’s data acquisition tools to import the models and create a 3D master model of the entire project. The master model was ultimately used to cut cross sections and serve as a reference during plan preparation. In areas where the storm sewer network had to be retrofitted, GEOPAK drainage tools allowed the designers to lay out the existing network, then place additional nodes and pipes relative to the new alignment. This drainage model was exported into StormCAD® for advanced network modeling, and then imported back into GEOPAK for final plan preparation. Flood Protection, Pedestrian Safety Priorities Foth used FlowMaster® and CulvertMaster® to perform the extensive hydraulic analyses required for correction of