2004: Los Angeles County Board of Supervisors approve the Sun Valley Watershed Management Plan.
2006: Sun Valley Park Drain and Infiltration System is completed; Design consultant is on-boarded to begin conceptual development of the Strathern Wetlands Park.
2007: Tuxford Green Multiuse Project is completed.
2008 to 2009: Strathern Pit site is purchased by LA County; Former company (LA By-Products) continues to fill the site until they are required to cease operations and vacate site.
2009 to 2012: Land acquisition process is completed. Concrete mixing company (Over & Over, Ready Mix) decides to remain on site and continues to operate until the end of their lease in 2017.
2011: Series of three workshops are held to obtain feedback from the community on their needs and design features of the park.
2013: Strathern Wetlands Park renamed to Rory M. Shaw Wetlands Park.
2014: Geotechnical investigations including 20 test pits and 15 borings are performed over the Strathern Pit and Over & Over site; organic trash and methane from the previous Newberry Landfill is discovered underneath the northern portion of the site; additional methane testing is conducted along northern boundary of site; Rory M. Shaw Wetlands Park Groundbreaking Ceremony.
2015 to 2016: The design plans are redesigned to address the discovery of the organic landfill material, this involved the realignment of park features, rephasing of the project construction, and addition of a passive methane treatment system.
2017: Over & Over, Ready Mix vacates the site; Site demolition, trash and waste removal, and site investigations including ground penetrating radar are performed to identify underground utilities and storage tanks.
2018 to 2019: Extensive geotechnical testing and investigations including compaction testing and additional borings are performed which inform the development of the design plans; it is determined that larger amounts of earth will need to be removed and require hauling off-site; discussions begin with landfill groups to find suitable disposal locations.
2020: Third-party analysis is requested by Board of Supervisors to ascertain ways to improve project schedule, cost, and constructability; Additional environmental analysis is performed to determine if any additional impacts from off-site truck hauling, compaction methods, and passive methane treatment system.
2021: Design plans are being revised to incorporate constructability, environmental, and safety measures determined by previous analyses.