Gateway Regional Medical Center Lake & Dam2018-06-07T21:09:50+00:00

Project Description

Gateway Regional Medical Center Lake & Dam

Gateway Regional Medical Center Lake & Dam
  • LOCATION: Granite City, IL

  • CLIENT: Gateway Regional Medical Center

TWM offers lake and dam engineering solutions to clients in the greater St. Louis region including Southern Illinois. For this project, we designed a new earthen dam embankment, drop inlet principal spillway, emergency earthen channel overflow spillway, energy dissipator structure, and outfall channel to replace a deteriorated earthen dam / spillway structure.  Design included HEC-1 hydrologic/hydraulic analysis and a dam breach analysis using HEC-RAS.  An emergency action plan was also prepared for use by local ESDA agencies, and the lake was designed with storage to provide storm water detention for the development that is proposed to encompass the watershed of the lake.  Permitted as a Class I, small size dam by IDNR-OWR.

Visit our Healthcare page.

Exceptional Service. Nothing Less.


TWM continues the important business of supporting our nation’s essential infrastructure in these uncertain times. We are committed to our mission of providing Exceptional Service, Nothing Less to you, our clients and partners. As a professional services firm, the health of our employee-owners and their families is paramount. We are following government directives and public health guidance, implementing work-from-home and other social distancing and hand hygiene practices. We have employed additional technological resources to support our modified operating structure, and we expect to be able to do so with minimal disruption. If you need to visit our offices in person or have trouble reaching your TWM contact, please contact us at 618.624.4488 so we can make arrangements or put you in touch with the appropriate person. Thank you for placing your trust in TWM. Wishing you safety and good health.