Agency TRANSPORTATION DEPT

Contractor Parson Brinkerhoff, Inc.

SWIFT Contract Number 38533

Project Name St. Croix River Crossing, Preliminary Engineering

Project Number (if applicable) 92530

Summarize purpose of the contract, including why it was necessary: The contract provided preliminary engineering for the extradosed river bridge and box girder ramp bridges for the St. Croix River Crossing. It was necessary to obtain these services through a consultant because MnDOT does not have expertise designing extradosed bridges.

Project Duration

Start Date Thu, 02/05/2009 - 00:00

Original end date Tue, 06/15/2010 - 00:00

Actual end date Mon, 12/31/2012 - 00:00

Did project finish on time? Yes

Total billable hours utilized (if applicable) {Empty}

Contract Amounts

Original contract: $2079252.43

Amendments $133024.60

Contract total $2212277.03

Did project finish within budget? Yes

What was the funding source? TH

Is this a sole source contract? No

If this was a single source contract, explain why the agency determined there was only a single source for the services (if applicable) {Empty}

Evaluator Name Keith Molnau

Evaluator Email Address keith.molnau@state.mn.us

Evaluate the contractor's timeliness Project submittals were made in conformance with project schedule and agreed upon submittal dates. Very good timeliness with development of aesthetics, response to inquiries, revisions to reports, and completion of the Preliminary Bridge Plans for highly complex Extradose Type Bridge.

Evaluate the contractor's quality Very high quality preliminary bridge plans were submitted in conformance to pre-established geometrics; however, span layout was revised in Final Design in conjunction with revised geometrics that were proposed and ultimately approved during Final Design Phase. The innovation to simplify the extradose back span would have preferably occurred in Preliminary Design, but this innovation was not proposed and agreed upon until Final Designers successfully achieved revised geometrics and also required increased confidence that longer spans were achievable, which was confirmed during final design.

Evaluate the contractor's cost Within expected budget for the highly complex project, Minnesota's 1st extradose bridge type.

Evaluate the contractor's overall performance Excellent work on the development of Preliminary Bridge Plans for Extradose Type Bridge, including engaging expert input from Japan from key extradose expert with experience on extradose type bridges. Design criteria was development for specialty bridge type, along with several reports that included specialized design criteria for the project. Much of this work was completed on project that few had confidence would be built. Diligent attention to detailed development of design criteria, span layout with flexible piers, and limitations on tower heights were established and used as framework for subsequent revisions that were then made with more confidence during final design as MnDOT's understanding of extradose type bridge evolved. Initial work by PB was outstanding framework for final designers to use and then ultimately make choice to push spans out even further than were agreed upon initially with the preliminary design.

Would you engage the contractor's services again? Yes

Describe any negative action taken during the duration of this contract (i.e., termination, pursuit of suspension, etc.): None.

Please rate the overall experience with the contractor 5 - very satisfied