2022 Big Dry Creek Interceptor (BDCI) Sanitary Sewer Rehabilitation Project Phase II

Please excuse our mess! Our apologies in advance for the annoyance of traffic impacts! Thank you for your patience and cooperation while we rehabilitate critical infrastructure to protect health, safety and the environment in your neighborhood!

Schedule Update (11/28/2022):

The contractor has commenced the final phase of Phase II of the rehabilitation work on the BDCI. Finalization of a few items is currently in progress.Completion of the project is expected by December 15th, 2022.

Project Information:

Work is scheduled to occur throughout the District’s service area including within the Cities of Centennial, Englewood, Greenwood Village and Littleton, Colorado.
Contractor will rehabilitate approximately 5,000-linear feet of forty-two-inch (42”) diameter reinforced concrete pipe (RCP) sanitary sewer via cured-in-place pipe (CIPP), which will require continuous sewer bypass. Contractor will also rehabilitate twenty (20) sanitary sewer manholes, remove existing stairs, clean and remove latent material, 300-vertical feet of topcoat lining, stop active water infiltration, structural rehabilitation via cementitious build back, and raise and reshape the inverts. Approximately two (2) of the rehabilitated manholes are in roads and require traffic control, and other manholes utilized for the temporary bypass pumping may also require traffic control. Existing sewer manholes consists of concrete and brick and mortar in various states of deterioration.
Design Engineer
Burns & McDonnell
Inliner Solution
Project Contact: Reid Sutherland
Email Reid Sutherland
(303) 656 8004

Contact Us

  1. Engineering

    Email Engineering

    Southgate Water & Sanitation

    3722 East Orchard Road
    Centennial, CO 80121

    Phone: 303-779-0261
    Fax: 303-779-0220


    (Water breaks and sewer backups)


    (Except holidays)
    Monday - Friday
    8 a.m. - 4:30 p.m.

    Staff Directory

Slideshow of ongoing work for this project

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BDCI Rehab Phase 2 Exhibit

BDCI Rehab Phase II Exhibit

The typical events occurring during the rehabilitation efforts are as follows:

  • Set-up traffic control for the safety of workers, drivers, and pedestrians
  • Isolate the section of sewerline/manhole to be rehabilitated
  • Clean sewerline
  • Setup bypass system
  • Install Cured-In-Place-Pipe
  • Test the newly rehabilitated sewerline – we test to ensure the lining is installed to established specifications
  • Re-establish existing sewer service connections to the newly rehabilitated sewerline
  • Open the street/area to traffic before moving on to the next section of pipe rehabilitation
  • Restore disturbed areas to similar conditions as before construction

Neighborhood Impacts During Construction

  • Noise
  • Contractors communicating, operating equipment and vehicles, backup beepers, etc. all generate more noise than typical. The back-up beepers are usually the most noticeable noise – these are required for worker and resident safety
  • Unplanned Service Outages (includes water, sewer, gas, electric, internet, and phone)
  • The contractor takes great care not to damage existing utilities, but sometimes utilities owners do not locate their existing utility in the dig area effectively (including Southgate).  Hitting an existing utility with the excavator will typically result in a service outage.  Note that these outages may not be reported to residents directly.  Call Southgate’s office for updates on unplanned service outages. 
  • Road and Sidewalk Closures
  • Lane closures will be required daily with approved traffic plans by the various municipalities mentioned above
  • Notifications regarding “No-Parking” zones will be posted prior to construction on your street
  • Access to driveways may be temporarily impacted while the contractor rehabilitates pipe in front of the driveway
  • Please mind the “No-Parking” zones – ignoring no parking zones could result in towed vehicles
  • For your safety, avoid the active construction areas and do not walk through construction zones
  • Increased Traffic
  • From the contractor executing work, inspectors making site visits, and detoured drivers to avoid construction zones
  • Construction Materials Stored in the Streets
  • The contractor will have materials temporarily stored in the streets, such as dirt piles and pipe, in anticipation of using the materials for construction
  • Messiness
  • The streets will get messy with construction – the contractor will keep the streets and sidewalks as tidy as possible as they move through the project area
  • At the end of the project, the contractor will do one big final cleaning of all the streets and sidewalks

Notification for Property Owners

  • Please check your front door for notifications during construction
  • Contractor is required to notify you before blocking your driveway
  • Contractor is required to notify you at least 24 hours in advance before planned water shut-offs to accommodate:
  • Reconnecting any existing sewer services to the existing system
  • Planned water shut-offs are typically scheduled Monday through Friday, 9 am to 5 pm
  • Sometimes the contractor runs into unforeseen circumstances that results in an unplanned water shut-off – You will not get a notification if it was unplanned
  • Safety situations can arise or planned shut-offs turn into an emergency situation and last longer than expected

Emergencies (Water Leak and Sewer Spill)

Call Southgate at (303) 779-0261, option 8 to speak with a Field Operator.