The project will install an underground storm drain system on Mary St. The improvements will relieve pressure on the existing, undersized storm drain system. It will reduce the risk of flooding by adding capacity to the storm drain system.

Current Status

We found a way to complete the storm drain system without adjusting the water line or needing to turn off water. 

Construction Safety

Safety is a priority for us. We ask that pedestrians and bicyclists, as well as vehicles, follow detours and instructions from flaggers, construction personnel and City staff. In addition, pedestrians should stay out of the construction area. There is a real risk from moving equipment and it is a violation of OSHA regulations.

Project Scope

This project includes the construction of an underground storm drain system on Mary Street from East Bouldin Creek to Newton Street. We will connect the new system to the existing culvert underneath the bridge on Mary Street. We will also replace two existing inlets on Mary St. 


  • Permit Process Initiated – October 2019
  • Permit Issued – March 2020
  • Tentative Construction Start – Mid-May 2020
  • Tentative Construction Completion – October 2020


$750,000 from the Drainage Utility Fund and the Regional Stormwater Management Program.

Construction Impact

The project is intended to relieve pressure on the existing, undersized storm system and alleviate localized flooding.

Construction is currently anticipated to start in mid-May. Residents should expect noise, dust, vibrations and lane closures during construction. Work hours are 7 a.m. to 7 p.m. weekdays. There may also be occasional work on weekends.

Construction crews will follow all City and State COVID-19 safety requirements for construction sites.


Mary Street Map showing construction impact



  • David Hernandez, Project Manager, Public Works, 512-974-3014, Email
  • Annabell Ulary, Project Sponsor, Watershed Protection, 512-974-3486, Email

If you would like to receive occasional email updates on this project, please email Stephanie Lott or call 512-974-2799.