The open house is scheduled for 4 to 7 p.m. on Tuesday, April 29, at the Vancouver Church of Christ (9019 N.E. 86th St.).
Last year, the county hired Vancouver-based Maul Foster & Alongi Inc. to lead a master planning effort for the 74-acre landfill and 46 acres of adjacent property.
According to the county, redevelopment options for the landfill will be limited for at least another five to 10 years as it continues to produce methane gas, which is collected through an above ground network of pipes and burned.
A 35-acre site to the south of the landfill, known as the Leichner Campus, has significantly more development potential.
Leichner Landfill is east of Northeast 94th Avenue and north of Padden Parkway. It was the county’s primary landfill until it was closed in the early 1990s.