An Agile Approach to Multi-Benefit Recognition and Application Around “Living” Stormwater Systems
Date & Time
Wednesday, September 15, 2021, 8:30 AM - 9:00 AM
Brandon Willnecker

Living stormwater systems, much like their water and sewer wet utility cousins, consist of active components such and treatment systems, monitors, cleaning, inspections, and regulatory reporting and effluent limits and open the doors to agile based opportunities to look beyond individual projects and connect multiple benefits, deliver future decision making data, and function as components of larger integrated systems. Considering repurposing of existing systems with simple retrofits and programmatic changes are starting points for modern stormwater efforts. The City of Anaheim State College Boulevard Best Management Project (Project) is an example of a retrofit project resulting in multiple benefits and opportunities for the project and beyond. The Project is located along a two mile stretch on State College Boulevard, in the City of Anaheim, California. The Orange County Sanitation District abandoned an existing 36” - 42” trunk sewer line and installing a new 54” diameter trunk sewer line paralleling the abandoned system. The City of Anaheim recognized an opportunity to repurpose the abandoned sewer system and utilize it for stormwater purposes. The City has been able to pursue initiatives that include the following: • Grant funding for stormwater specific projects through partnerships with water agencies. • Groundwater recharge options – 65 to 90 acre feet yearly benefit • Reporting and monitoring implementation of remote/autonomous sensors • Pilot operations and maintenance department programs • Predictability/Standardization of maintenance intervals and cost • Quantifiable yearly benefit to groundwater recharge • Dry weather and nuisance water capture. • 35%-40% annual rainfall watershed volume capture • Reducing flow rates and volumes in historically deficient regional conveyance systems • Real time life cycle performance of drywell infiltration systems • Reducing downstream burden to private property and increasing land value and developable area • Cost savings through re-purposed infrastructure • Sensor based data capture to provide geographically relevant data for rainfall runoff from 200 acre single family residential area. Develop future master planning calculations to reflect “actual” runoff versus 40+ year old hydrology manual values. • Improve CIP spend through real time prioritization decision making process • Inclusion into a BMP credit trading program • Maximizing benefit in ultra-developed areas • Additional projects along the watershed to include utilizing parks, above and below ground storage. Purple pipe irrigation. • Improve future design projects through understanding of life cycle performance and real world results. • Streamlining reporting and compliance programs.