This Learning Note presents evidence synthesized from interviews with project staff, government stakeholders and other partners to understand how USAID/Haiti, stakeholders, and DAI used adaptive management to successfully implement the five-year USAID Water and Sanitation Project in Haiti to achieve successful results, even as Haiti struggled with its economic crisis, the COVID-19 pandemic, the assassination of the President, and a major earthquake. While this document focuses on the water activities, the lessons apply equally to the sanitation activities. The three main key adaptive management lessons are