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PRESERVATION PROCESS <br />HISTORIC RESOURCES SURVEYS <br />Surveys are a common tool used to identify and evaluate a property's significance before a property <br />is awarded a national, state, or local historic designation. Surveys are generally completed to <br />support proposed projects in compliance with Section 106 of the NHPA or as an NPS THC grant - <br />funded preservation planning project, while other specialty surveys may be developed in support <br />of economic development and cultural arts and natural resources initiatives promoted by agencies <br />and groups such as the NTHP, TCA, and conservation groups. Once designated, properties become <br />eligible for a variety of national, state, and/or sometimes local incentives depending on the <br />property's use and locality. <br />A preliminary review of readily available and accessible information about a defined <br />Desktop Survey area, including municipal parcel data and historical maps and aerial photographs in <br />preparation for on -site investigations. <br />Ad riving survey through a community that does not comprehensively document <br />Windshield Survey every property within a boundary. This type of survey allows coverage of a <br />broad geographic region in a short amount of time and the identification and <br />documentation of a survey area's most important resources. <br />A detailed inventory of all historic -age and if for a historic district nomination <br />Reconnaissance nonhistoric-age properties within a defined area. This involves taking exterior <br />Survey photographs and making preliminary recommendations regarding the historic <br />significance and eligibility of a resource for historic designation. <br />Atype of historic survey that focuses on a specific theme, rather than a geographic <br />Thematic Survey area. It identifies and evaluates historic properties that share a common historical, <br />architectural, or cultural significance. <br />A detailed examination of a property, which involves taking exterior and interior <br />photographs, preparing a resource -specific historic context, and other intensive <br />Intensive Survey research like tracing ownership over time through deed records. The goal of an <br />intensive survey is to arrive at a conclusive recommendation of eligibility for historic <br />designation. <br />Migrant worker's windshield by Dorothea Lange, 1936 (Courtesy of LOC, Office of War, FSA). <br />SAN MARCOS HISTORIC PRESERVATION PLAN (2026) <br />