Detroit Water and Sewerage
Inland Waters Pollution Control
NTH Consultants, Ltd.
NTH Project Budget:
Emergency Sinkhole Repairs
Romeo Arm Interceptor Reconstruction
The Romeo Arm of the Macomb Interceptor, which provides 30-60 million
gallons of wastewater flow per day, was constructed in the early 1970’s to provide sanitary sewer service to the residents of Macomb County.
In August 2004, six homes were evacuated as a safety precaution when a 40-foot deep sinkhole developed over the Romeo Arm Interceptor in the city of Sterling Heights, Michigan. NTH was called to the site to stabilize the area, make preparations to ensure no interruptions to wastewater service, and to permanently repair the damaged interceptor.
Following on-site evaluations, it was determined the following procedures
would be necessary to stabilize, and repair the interceptor collapse:
Working with several subcontractors, often on a 24/7 schedule, NTH
replaced the damaged portion of the interceptor by installing 23-pipe
sections measuring 8-feet long by 11-feet in diameter. Crews have now
removed the bulkheads in the interceptor and have back-filled the hole to a depth of 18-feet below road level. NTH will continue to provide field
engineering and QA/QC for this project through its completion. NTH is
working closely with the project team and with the owner, Detroit Water and Sewerage Department, to accomplish the repairs.