The City of Coral Gables is located within Miami-Dade County, Florida. The city owns, operates, and maintains its Sanitary Sewer Collection System. Wastewater flows from the city are then discharged into Miami-Dade Water and Sewer System for treatment and disposal. As a Volume Sewer Customer of Miami-Dade County, the City of Coral Gables has seen tremendous success in reducing its billing costs by reducing wastewater flows through an aggressive Infiltration and Inflow (I/I) abatement program. For each 100 gallons per minute of I/I reduced, the city saves over $162,000 on billings annually, in addition to savings in power costs, pumping, and operation and maintenance activities associated with the I/I flow. The city’s I/I abatement program’s success is directly linked to the utilization of trenchless technologies such as Pipe Bursting, Sliplining, and Cured-In-Place Pipe. These trenchless techniques have not only been extremely cost-effective, but have also allowed for rehabilitation and repair of sewers while minimizing impact on the community, both in residential neighborhoods, and in the city’s vibrant downtown area.

Proficiency Level

Applied

Learning Objectives
  1. Recognize the performance of trenchless techniques in reducing I/I as determined through flow measurements taken before and after the sewer rehabilitation
  2. Analyze the interrelationship between Wastewater Flow Data, Rainfall Data, Tidal Elevation and Groundwater Table Elevation as these relate to estimating I/I
  3. Develop I/I Corrective Action Plans and implement cost-effective rehabilitation/repair methods utilizing trenchless techniques
  4. Prepare a community outreach and engagement strategy to obtain input to align the needs of community stakeholders with the goals of a project

Contributor/Source

Jorge Acevedo PE;Paola Davalos

Claim CEUs

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