Town of Trinidad

Feasibility study and final design of the drinking water supply and urban sewerage of the town of Trinidad.



Name of Client


Financing sources

Italian Ministry of Foreign Affairs (MAE)


07/1990 - 02/1994

Project Description

Hydrogeological and geophysical study for the boring of 4 deep wells; Trinidad Water Supply and Drainage Master Plan including the Feasibility Study, Final Design and Bid Documentation of some selected alternatives; Technical Assistance for implementation works.
Activities have included: a socio-economic study; population growth and urbanization study; weather study; hydrological and hydrogeological studies; price scale study; technico-economical feasibility study; Final Design of two selected alternatives; Bid Documentation preparation.
The socio-economic study gave the opportunity to determine the solvability of the various layers of urban population and the siting of varying public and private bodies and the role that they play in the town social structure.
The study of the population growth and of the urbanization phenomenon aimed at defining the number of inhabitants at different periods (final period: 2010, 130 000 inhabitants) and their possible supply over the area; a urban use plan has identified the districts of future development and the type of residence.
The weather study aimed at defining the climate conditions of the town, but also to estimate the water balance, based on surface waters as well as on ground waters potentialities.
The hydrological study has been necessary to identify the surface waters levels in the area; such a datum was very important to design the oxidation lagoons collecting the wasted waters. The hydrogeological study was carried out through an investigation campaign for measuring the potential ground waters, from a geoelectrical study; thus it has been possible to draw up the electrical potential map as well as the one of the boring and the study for three deep wells.
During the boring campaign and the deep wells study, the limits as quota acquifers have been determined in order to reject the ones too deep or having a salinity not compatible with human use.
The technico-economical feasibility purpose was to determine the water investment minimum cost prices for implementing and maintaining the drinking water network and the wasted waters one. On the other hand, the price scale study aimed at determining the solvability of the various social classes of inhabitants in order to fix the fees accordingly.
Final Design and Bid Documentation were prepared for the implementation of the following works:
- 1 drinking water system, with 13 deep wells, 1 half-buried compensation tank of 8 200-m³ capacity, 1 pumping station, 1 superelevated tank of 1 000-m³ capacity, 137-km piping (14.0-km for adduction and 123-km of distribution network);
- 1 drainage system made of 84.0 km of sewers, 2 superelevated stations, 1 pumping station, 1 wasted waters treatment plant made of 6 anaerobic lagoons with 18 facultative anaerobe ones.
In addition to the activities above mentioned, a reorganization and strengthening program has been prepared for the body responsible for the management of both systems. (Training of the local staff included).

Services Description

Feasibility study and final design.