Innovative Outfall Treatment – Retrofits and New Construction

Jan. 21, 2022

The 2022 SWS Webinar Series kicks off on January 20 at 1 p.m. CT. 

Register here | January 20 | 1 p.m. CT 

Storm water runoff continues to act as a key contributor to impaired water resources, and the design community must rise to the occasion by striking a balance between modern development and healthy ecosystems. Outfalls in municipal separate storm sewer systems (MS4s) are the last line of defense before storm water is discharged directly into water bodies, and these sensitive areas are often hotspots for severe erosion and conduits for downstream flooding. Consequently, outfall retrofit projects can be implemented in response to uncontrolled runoff from upstream development, inadequate energy dissipation and poor slope stabilization.

This presentation will also provide an overview of innovative outfall retrofits that divert storm water flow from small storms, dissipate the energy, and provide treatment through infiltration and the use of a level spreader. Outfall retrofit projects offer sustainable solutions that contribute to resilient communities by combining water quality and water quantity controls to reduce pollutant loads to downstream waterways.


Fernando Pasquel
Senior Vice President
National Director, Stormwater & Watershed Management; Arcadis

Fernando is a Water Resources Manager with 35 years of experience developing and implementing storm water and green infrastructure programs. He has assisted several municipalities with implementation of storm water utilities and alternative funding mechanisms, compliance with MS4 permits and TMDL requirements, and development of program effectiveness indicators.

Fernando has coauthored green infrastructure/BMP manuals in several states and has conducted training workshops covering all aspects of funding, planning, designing, and maintaining urban storm water controls. He was also a contributing author for two Water Environment Federation (WEF) publications: User-Fee Funded Stormwater Programs (2013) and Green Infrastructure Implementation (2014), Financing Strategies Chapter. He currently serves as Chair of the Advisory Committee of WEF’s Stormwater Institute. Fernando received B.S. and M.S. degrees in Civil Engineering from Virginia Tech.

Jillian Parrinello   
Water Resources Engineer; Arcadis

Jillian is a Water Resources Engineer who received a B.S. in Civil Engineering from Virginia Tech. She has enjoyed working at Arcadis for 4.5 years on an assortment of storm water projects that revolve around MS4 Permit compliance. She has experience with infrastructure design, storm water management plan development, construction administration, and stormwater compliance sampling. Jillian is also a certified Combined Administrator for Stormwater Management in Virginia who frequently performs inspections of stormwater assets, plan reviews, and helps manage her client’s storm water programs.

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