JOIN US SEARCH LOCATIONS CONTACT DEA HOME WHO WE ARE WHAT WE DO SOLUTIONS NEWS WATER AND ENVIRONMENT :: WATER RESOURCES Balancing a thriving, healthy environment with good economic development and responsible social awareness calls for a comprehensive approach to watershed management. Working with a wide variety of clients from nonprofit organizations to municipal agencies, DEA provides project management, environmental science, and hydrologic engineering services related to watershed assessments, analyses, and basin-wide planning projects. Services Strategic surface and stormwater conveyance design and analysis Hydraulic and hydrologic modeling, analysis, studies and reports Stormwater retention and detention storage facility design and construction Hydromodification and flow control mitigation design and construction Low Impact Development (LID) and water quality treatment design Stormwater Pollution Prevention Plans (SWPPPs) and regulatory compliance Fish passage design and construction Culvert design and construction Stream restoration design and construction Floodplain mapping and FEMA map updates Flood hazard management planning and projects 1200-C Erosion Control Plans, permitting, and peer Review 401 certification and Department of Environmental Quality (DEQ) Stormwater Management Plans (SWMPs) More Key Contacts :: Related Projects Water and Environment Environmental Planning and Compliance Water Resources Water / Wastewater Infrastructure Water Projects Key Contacts Julie McCaskill Water Resources Practice Leader jrmc@deainc.com 503.499.0574 Who We Are History Core Ideology Leadership Stewardship Locations Contact DEA What We Do Energy Land Development Transportation Water and Environment Surveying and Geomatics Marine Services Solutions Alternative Project Delivery Construction Engineering Energy Development Engineering Landscape Architecture Environmental Planning and Compliance Planning Project Management News Awards Rankings Join Us Our People Current Openings Benefits Subconsultants and Vendors David Evans and Associates, Inc., 2100 S. River Parkway, Suite 100, Portland, OR 97201 :: 800.721.1916 Copyright © 1996-2021 David Evans and Associates, Inc. All rights reserved. :: Terms of Use | Privacy Policy