InfoWater and CapPlan water for advanced GIS-Centric capital planning


Startex-Jackson-Wellford-Duncan Water District (SJWD), South Carolina, USA, has selected the ArcGIS-centric (Esri, Redlands, CA) InfoWater and CapPlan Water for advanced water system modelling and rehabilitation planning. SJWD is the latest utility to turn to the CapPlan product line for comprehensive decision support and optimised rehabilitation and renewal spending.

Created in 1956, SJWD covers 128 square miles in Spartanburg County in western South Carolina. The District serves approximately 20,000 accounts and a service area population of approximately 45,000. 'SJWD is committed to providing our customers with the best possible service at the lowest possible rates,' said Billy Cothran III, Director of Engineering for SJWD. 'Using MWH Soft technology helps us to further that goal. InfoWater and CapPlan Water enable us to do our modelling and rehab analysis work on one cohesive platform and make smarter decisions on managing our critical infrastructure.'

CapPlan Water changes the way water utilities plan the relative phasing of system improvements by allowing users to assess both the probability and consequence of failure for each asset. Assets that affect system operation will normally rate high on the consequence scale, while assets in poor condition will have a high probability of failure.

Probability of failure is determined based on the pipe's physical condition (structural integrity, age, material, roughness factor, leakage/break/defect history) and location (proximity to a seismic fault or construction zone) as well as its hydraulic performance characteristics (head loss, pressure, velocity). Consequence of failure draws on data such as water outages (schools, hospitals, critical care facilities); low- and no-water conditions; reduced fire protection capabilities; flooding, including structural damage and impacts of chlorinated water in natural waterways; degradation of water quality; and other factors.

Built upon ArcGIS and InfoWater platforms, CapPlan Water tackles the toughest data integrity and processing issues that slow typical large-scale asset management analysis projects. Leveraging the InfoWater geodatabase architecture, users can seamlessly work between hydraulic modelling calculations and traditional GIS data to determine probability and consequence scores without cumbersome error-prone exports and data synching to third party applications.

CapPlan Water calculates the risk of each asset linearly (consequence score multiplied by probability score), using either a bi-directional distribution matrix or a more complex multi-criterion classification. This choice of calculation methods gives the utility unprecedented flexibility to define risk based on virtually any combination of supporting data. The greatest attention can then be given to water mains at highest risk. With this evaluation in hand, water utilities can create fully prioritized short- and long-term water main rehabilitation, replacement, maintenance and management plans and develop sound, cost-effective capital programs to support them.

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