No-Dig Gains Ground

by Luis Aguiar, Asst. Dir.; Miami-Dade Water and Sewer Dept., 4200 Salzedo St., Coral Gables, FL 33146,
Thomas G. Scheller, P.E., Program Mgr.; Rust Environment & Infrastructure, 2600 Douglas Rd., Ste. 800, Coral Gables, FL 33134,
James T. Cowgill, P.E., Vice Pres.; Hazen and Sawyer, P.C., 4000 Hollywood Blvd., 7th Floor, Hollywood, FL 33021,
Iqbal Noor, Proj. Engr.; Hazen and Sawyer, P.C., 2600 Douglas Rd., Ste. 800, Coral Gables, FL 33134,

Serial Information: Civil Engineering—ASCE, 1996, Vol. 66, Issue 8, Pg. 54-57

Document Type: Feature article


The Miami-Dade Water and Sewer Department (MDWASD), the regional wastewater utility of Metropolitan Dade County, is currently undertaking one of the Country's largest Infiltration/Inflow (I/I) reduction programs. Under this program, MDWASD intends to evaluate the condition of its gravity sewer collection system by performing manhole inspections, smoke testing and closed circuit television inspection. The entire system has 57,211 manholes and 2,483 miles of gravity sewers, which make up 889 collection basins. Approximately 90% of the gravity sewers are made of 8-inch diameter vitreous clay pipes (VCP). This paper outlines the methodology used to identify the different types of sewer repairs in MDWASD's I/I Reduction Program.

Subject Headings: Gravity sewers | Manholes | Inspection | Wastewater management | Water supply systems | Urban areas | Infiltration | Smoke

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