The Feasibility Studies and Design of a Public Sewage Collection, Treatment and Outfall Scheme for the South Coast of Barbados

In 1988, as part of commitment to maintain and improve the quality of beaches and nearshore waters along Barbados' densely populated south and west coasts, the Government of Barbados commissioned Reid Crowther International to carry out feasibility studies and the detailed engineering design of a public sewage collection, treatment and outfall scheme for the south coast. The studies and designs were completed in 1990 and the Government is now negotiating with the Inter-American Development Bank for funding to pay for the construction of the project. The paper describes project background, estimation of design flows and loads, and treatment plant/outfall design including the detailed marine studies undertaken for the project. Interesting aspects of the sewage collection system design, including the proposed use of “No-Dig” trenchless sewer technology and the project's environmental impact assessment are also described.