Hydrologic Sampler User Guide Front Matter Current: Title Page Title Page HEC-WATHydrologic SamplerUser GuideFebruary 2022US Army Corps of EngineersInstitute for Water ResourcesHydrologic Engineering Center609 Second StreetDavis, CA 95616 (530) 756-1104(530) 756-8250 FAXwww.hec.usace.army.mil ×