The reference hydrofabric is the product of a long-standing, collaborative effort among USGS, NOAA, and Lynker, establishing a shared baseline for the hydrographic representation of the landscape through the aggregation of decades of NHDPlus corrections and refinements. This common starting point provides the community with a consistent, authoritative definition of the hydrologic landscape. Building on this foundation, the Lynker Modeling Fabric extends the reference hydrofabric to include additional network classes—such as coastal and non-dendritic flows—and incorporates improved representations informed by data-driven methods and community-contributed enhancements.