Construction, Operation and Maintenance Guideline for Stormwater Treatment Devices
Stormwater Conference
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The Auckland Regional Council is reviewing Technical Publication 10 (TP10) Design Guideline Manual for Stormwater Treatment Devices. Experience shows that many stormwater treatment devices are not functioning correctly due to poor design, inappropriate construction methodologies or insufficient maintenance.
Consultation with industry identified a number of issues regarding construction and maintenance. To adequately address these issues, separate volumes have been prepared for construction of devices, and on operation and maintenance (O&M). These new volumes aim to address the shortfalls around evidential construction and maintenance issues, and to increase awareness of construction, operation and maintenance constraints during the design process.
The new volumes provide information to designers and contractors. Initial sections cover generic considerations, consents and other legal compliance, construction specifications, documentation, monitoring and technical guidance. Each volume then provides a chapter for each stormwater device in TP10. The construction volume provides key components, standards, construction considerations and example specifications. The O&M volume provides guidance on O&M manuals, recommended actions and frequency and troubleshooting.
This paper showcases the rain garden chapter from design through to construction including contract documents, specifications and monitoring. This is followed by key issues to consider for operation and maintenance including maintenance schedules and auditing.