City and County of Honolulu Kaka‘ako Catch Basin Retrofits, South Street Bicycle Lane Permeable Pavement, and Sheridan Street Bioretention Area Case Studies


This presentation will feature three case studies to retrofit existing stormwater infrastructure with non-LID and LID best management practices in a tropical urban environment. The projects were completed on a fast-track design and agency outreach process due to lapsing funds. The projects are part of the municipal government to stimulate the local economy after the devastating effects of the COVID-19 pandemic.

Learning Objectives: 

  • Understand how to implement stormwater BMPs in an urban setting with Hawai‘i’s unique environmental, physical, and cultural characteristics.
  • Address green and gray infrastructure challenges, including site selection and maintenance requirements that fit the resources of the local municipality.
  • Understand the importance of data collection to meet MS4 permit requirements.

Presented by Jay M. Stone, P.E., BCEE, CFM, CPESC, CPSWQ, CWPPP, LEED AP – Vice President/Director of Engineering, Belt Collins Hawaii, LLC

Mr. Stone is Belt Collins Hawaii’s Vice President and Director of Engineering. With over 27 years of experience, Mr. Stone’s design expertise includes stormwater treatment and inspections, ecosystem restoration, wastewater collection and treatment, water treatment and supply systems, and drainage improvements. He also has extensive experience in environmental permit processes at federal, state and county levels as related to waterfront projects, including Department of the Army permits, Section 401 Water Quality Certification, National Pollutant Discharge Elimination System permits, and resource agency (NOAA, USFWS, SHPD, DLNR-DAR and DOFAW) consultations. He holds bachelor’s degrees in English and Civil Engineering from the University of Notre Dame and is a licensed civil engineer in Hawai‘i. He is also a board-certified environmental engineer in water supply and wastewater with the American Academy of Environmental Engineers and Scientists, Certified Floodplain Manager, Certified Professional in Erosion and Sediment Control, and LEED Accredited Professional. He is a former instructor with the University of Hawai‘i Outreach Program Water Technology Education Program. A practitioner of aikido since 1988, Mr. Stone teaches children, teenagers, and adults at the Kaonohi Zanshin Aikido dojo, which meets Saturdays at the Kalihi YMCA. He is also a podcaster on ComicsViews (, discussing comics, film, and television pop culture.