NSD + CGS’s engineers, geologists, and scientists bring a wealth of diverse experience in civil, environmental, and natural resources construction management applications that have established the firm’s reputation as a leader in the implementation of river and floodplain projects. Our design staff develops practical, flexible, and build-able solutions for nearly every river and stream setting, whether it be the replenishment of large wood in remote mountain rivers via helicopter, cable-logging techniques, pile-based construction of engineered logjams for habitat or road protection, or providing  survey control of hydraulic structures in a highly-urbanized environment. 

Similar to the working relationship we develop with our trusted clients, we maintain relationships with trusted contractors and suppliers because we understand that years of analysis and drafting can come down to days or months of construction. Our clients trust us to provide on-the-ground direction without delaying construction windows or depleting construction budget when site conditions differ from design assumptions or unforeseen issues arise. We support design-bid-build, design-build and field-directed construction contracts specifically tailored to the project’s challenges. NSD + CGS provides world-class support in bid document preparation, contractor requests for information (RFI) response, pre-bid and pre-construction conferences, construction stakeout, quality assurance and control, as-built documentation, measurement, payment and change-order support, and permit compliance monitoring.