Project: Metropolitan Lagos Water Distribution Systems Record Drawings

Assignment Name
Metropolitan Lagos Water Distribution Systems Record Drawings
Location within Country
Professional staff provided by your firm
Lagos State
Name of Client Number of Staff
Lagos State Water Corporation
Address Number of staff months/Project Duration
PO Box 555, Water House, Ijora, Lagos, Nigeria
9 months
Start Date Completion Date Approx. Value of services in Current US$
June 1989
March 1990  
Name of Associated Consultants If anyNumber of months of professional staff provided by associated consultants
McElhanny Engineering
Tahal Nigeria Limited
Name of Senior Staff (Project Director/Coordinator, Team Leader) Involved and Functions Performed:
  • Project Director/Coordinator: K.G. Till, P.Eng
Narrative Description of Project
A variety of record drawings dating from 1915 were available, however some areas of the City had no records whatever. Major thrust of the project was to develop accurate record drawings for the City of Lagos so that detailed design could be implemented in a cost effective manner.
Description of actual services provided by your staff
  1. Aerial photographs of the City were flown and mapping of the entire road network prepared.
  2. With that mapping available, survey crews proceeded to walk every street in Lagos and identify, with the assistance of Water Corporation plumbers, the locations, sizes and materials of all water mains. All significant surface features such as valves and hydrants were identified.
  3. The information was gathered using a mixture of manual recording and electronic distance measuring equipment. The use of the computerized EDM equipment meant that survey data could be downloaded directly into the base drawings.
  4. Complete as-built records for the entire water supply system existing within Lagos were prepared. These are available in digital form on CADD equipment, meaning that the Water Corporation is able to update these drawings.
  5. The system is compatible with the implementation of either a geographic information systems or a maintenance management system to ensure effective operation of the system in the future.