The 77 acre Matilda Happ preserve located in the Lower Beaver Creek watershed contains one of the few undeveloped freshwater wetlands on the West Coast. The Happ preserve is adjacent to the 1,261-acre Oregon State Park Brian Booth State Natural Area. The Happ Preserve and adjacent wetlands provide high quality waterfowl habitat. At dusk, ducks move to the slow moving, deep-water channel and dense cattails and bulrush of the preserve to roost for the night. TWC management includes removal and control of the invasive yellow flag iris.
The 112.2 acre Bayview Oxbow Preserve, located in the Alsea River estuary in Waldport, is a former tidal wetland on the western arm of a relic oxbow, which was once connected to Alsea Bay. TWC’s goals for the preserve are to protect and enhance the wetland and forest habitats by restoring natural processes through the removal of tide gates, ditches, dikes and levees and creating a more structurally diverse forest. This approach promotes a “tree to sea” flow of nutrients that helps enhance habitat quality in the estuarine, fresh-water wetland, mudflat, meadow and upland forests.
TWC acquired the 194-acre Matson preserve in 2001. In 2008, TWC partnered with The Coos North Bend Water board to return natural tidal flow and flushing to the wetland. This action created 49 acres of brackish water wetland marsh and 23 acres of freshwater marsh. Shrub and forest habitat enhancement and creation have been done in partnership with Coos Watershed Association's youth education programs.
The 18-acre Ian Nedry Peterson (Woahink Bog) Preserve is located four miles south of Florence, Oregon on the eastern shoreline of Woahink Lake. This ecologically important, locally rare floating lake-mat community includes the only known Oregon occurrence of the globally significant Labrador Tea/ darlingtonia/ sphagnum plant association. This preserve also contains a population of the relatively rare black crowberry. This plant association also includes plants such as cobra lily (Darlingtonia californica) and Labrador-tea (Rhododendron neoglandulosum).