|The Old Dowlin Mill is eligible for listing to the National Register under Criterion A for its association with the history of Ruidoso, New Mexico, under the areas of significance for Exploration/Settlement, Commerce, and Conservation. It is the first building and earliest enterprise in Ruidoso and one of dozens of water-powered mills (including the Casey, Blazer, and Ostic mills in the Ruidoso area) that operated throughout the New Mexico Territory in the late nineteenth century. As the only remaining water-powered gristmill still in its original location in New Mexico, the Old Dowlin Mill conveys statewide significance. It embodies the growing pains of a community as it evolved from unclaimed land to frontier enterprise and eventually to tourist destination. The mill is associated with the evolution of commerce and growth in Ruidoso. More than just a mill, Dowlin's enterprises became an outpost for commerce, the first post office, and the hub of a settlement known as Dowlins Mills and, later, Ruidoso. Finally, the Old Dowlin Mill is associated with the successful efforts at conservation of an historical resource and early example of adaptive re-use. The Old Dowlin Mill is eligible for listing under Criterion B for its association with Carmon Phillips, an influential member of the business community, commercial photographer, outdoor enthusiast, and promoter for Ruidoso as well as historic preservationist.