Mark your calendars. April 7 is the deadline for completing ENR Midwest's Top Contractors Survey, the basis for its annual ranking of the largest construction firms in the region, notably those operating in Illinois, Indiana, Michigan, Missouri, Ohio and Wisconsin. Firms are ranked in accordance with their revenues for 2013.

The list of the region's Top Contractors will be published in the July 14 edition of ENR Midwest.

In addition to highlighting the performance of individual firms, the survey provides a collective snapshot of construction activity in the Midwest. It also provides a short list for selecting ENR Midwest's Contractor of the Year.

Firms are selected on the basis of their financial performance, as well as their execution of key projects in the region, with previous honorees including BMW Constructors, Miron Construction Co. and Clayco Corp.

To submit a form, click on the Regionals Top Contractors Firms box on the right side of our home page – www.enr.com/midwest. – or simply click here.

And for a glance at the Top Contractors of 2012, click here.