SEMSWA’s MS4 Permit has a Post-Construction Stormwater Management/or New Development and Redevelopment program that requires the design and installation of permanent water quality Control Measure facilities that treat stormwater from a site after construction is complete. The SEMSWA Stormwater Management Manual (SMM), specifically Chapter 14, Stormwater Quality, contains the requirements on the developer team for the design, installation, and long-term maintenance for these facilities.

SEMSWA and the County have prepared a stand-alone Post-Construction Stormwater Management / New Development and Redevelopment Implementation Document that will meet the MS4 Permit requirements. The Implementation Document contains a revised SMM Chapter 14 that will be utilized by both SEMSWA and the County to meet MS4 Permit requirements. The remaining SMM chapters are now in the review and revision process so that all stormwater management practices in the City and County can be administered in a similar manner. Since some of the other SMM chapters address the process for review and approval of these permanent water quality facilities, the variance request process to deviate from the requirements, and other procedures to ensure that the permanent water quality Control Measure facilities are installed per the design and capable of long-term functionality, these “Administrative Requirements” are also contained in the Implementation Document to assist the design engineer with one reference manual for post-construction water quality facilities.

The efficiencies for SEMSWA staff managing the Post-Construction Program’s review/comment, permitting, inspection, enforcement, and facility final acceptance processes the same in the City and County, and the benefit to the development community and to contractors to have the  same requirements, were the overarching goals of the SMM Chapter 14 revision process. Additionally, a Phase Ill Drainage Report and Plan Design Checklist and Standard Control Measure Details have also been revised as part of the SMM: Chapter 14 revision process.