ICPI Interlock Design Issue 4 2019

3 North Carolina enabled water reuse for irrigation. The site in Wisconsin prevented stormwater from overloading a combined sanitary and stormwater sewer system, thereby saving wastewater treatment costs and reducing the risk of sewer overflows. PICP use is often dictated by local stormwater reduction ordinances. However, there is a growing project portfolio by private developers who have taken advantage of cost savings from PICP’s dual role of stormwater management and pavement. ICPI recently held a webinar demonstrating how to justify PICP from an economic analysis. The key is identifying on- and off-site benefits to include in a life-cycle cost analysis (LCCA). Those lifetime costs can justify using PICP rather than conventional stormwater management practices that manage runoff from impervious pavements and roofs. The most effective economic justification for using PICP emerge from developable land made available from reduction or elimination of detention ponds. Another area where PICP yields significant economic benefits is reduction of flows (due to infiltration) to waste treatment plants that process combined sanitary and stormwater sewage. A detailed LCCA example with these aspects was presented in a recent ICPI webinar that introduces a PICP LCCA Excel tool. The tool is available upon request to ICPI members and design professionals via dsmith@icpi.org . If readers are interested in viewing the recorded webinar, it’s available for $50. ICPI voting members can access the webinar for $30, affiliate members pay $35, and informational members $40. Here is how to access this resource: • Visit https://educate.icpi.org • Login in the upper right corner—please use your ICPI credentials • Select “Webinars” from the menu on the left • Select “ Continuing Education and Informational Webinars ” from the drop-down options • This webinar is under the “Sales”Webinar portion ICPI also has an LCCA tool for comparing interlocking concrete pavement lifetime costs to conventional asphalt and concrete pavements. That’s available for free from here . In the meantime, enjoy this issue, the recorded webinar, and the Excel tool over your favorite beer. l