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S&T Project 19155 Final Report: Econometric Analysis and Cost Forecasting for Relining Large Pipes

Published by Bureau of Reclamation | Department of the Interior | Metadata Last Checked: April 18, 2026 | Last Modified: 2021-09-30T21:12:22Z
This research used econometric techniques to evaluate 73 relining jobs for large diameter steel pipe interiors to identify major cost drivers for such relining jobs and to specify a regression model for predicting future relining job costs. Reclamation’s inventory of 121 unrelined penstocks was evaluated with the final model to predict preliminary-level costs for future relining work. An app tool was developed using Microsoft Power Apps as an end-user interface for predicting relining costs based on the final regression model. A subsequent Microsoft Excel tool was developed to share with the study’s contribution partner agencies: Metropolitan Water District, Central Arizona Project, Denver Water, and BC Hydro.

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