Development of Unit Cost Indices and Database for Water and Wastewater Pipelines Capital Works
Journal of Cost Analysis and Parametrics
The objective of this work is to develop a unit cost database and index for water and wastewater pipelines capital works, and estimate inflation in their construction cost. This was accomplished by analyzing tender summaries and progress certificates from the cities of Niagara Falls and Waterloo, Ontario, Canada, that span the period from 1980 to 2008, as well as using data from RS Means construction cost database. This work describes the source data, data preparation procedure, and development of unit cost database and indices. The process first involved developing scaling relationships between the cost of standard components and their sizes by regression analysis using data from tender summaries and the RS Means database. Next, unit costs of reference watermain and sanitary sewer projects and standard components are computed. Finally, a relational database is developed to store the data and to perform the unit cost analysis.
Dr. Rashid Rehan is an Associate Professor and Director at the National Institute of Urban Infrastructure Planning, University of Engineering and Technology, Peshawar, Pakistan. He received his Ph.D. from the University of Waterloo, Ontario, Canada. His research interests include condition assessment of water and wastewater infrastructure assets, deterioration modeling, infrastructure asset management, utility ﬁnancing, and service delivery.
Dr. Rizwan Younis is Managing Director (acting) at the Centre for Advancement of Trenchless Technologies, Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario, Canada. His research interests include asset management of buried urban infrastructure, condition assessment of water and wastewater pipelines, infrastructure ﬁnance, and trenchless rehabilitation and replacement of pipelines.
Dr. Andre J. A. Unger is an Associate Professor at the University of Waterloo, Canada and a professional engineer in the Province of Ontario. His research interest include: water infrastructure ﬁnance; project risk and uncertainty; computational hydrology; and, water resources management.
Brendan Shapton is M.A.Sc. candidate at the Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario, Canada. He received his B.A.Sc. in Civil Engineering from the University of Waterloo. His research interests include water infrastructure ﬁnance and trenchless construction for rehabilitation and replacement of pipelines.
Filip Budimir is Ph.D. candidate at the Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario, Canada. He received his B.A.Sc. and M.A.Sc. degrees in Geological Engineering from the University of Waterloo. His current research interests include groundwater geochemistry and remediation. Previously, he has worked in the water and wastewater infrastructure ﬁnancial data management and analysis areas.
Dr. Mark A. Knight is Executive Director at the Centre for Advancement of Trenchless Technologies and Associate Professor at the Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario, Canada. His expertise includes trenchless renovation and replacement of pipelines, geotechnical investigations, condition assessment of buried pipelines, and asset management of buried infrastructure. Mark and his team have developed industry leading software and online tools for the trenchless industry that include: Pressure pipe calculator for PE and PVC water pipelines (PPIPACE), Horizontal Directional Drilling programs (BOREAID and PPI-BOREAID, and Cured-In-Place Pipe design calculator (CIPPCALC).