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| Floodplain | Dam Safety | The Photogrammetry and Survey Section supports the activities of the Department of Natural Resources, local Natural Resources Districts, the Natural Resources Conservation Service and the U.S. Army Corps of Engineers by providing a variety of mapping and surveying services. The Section uses state-of-the-art equipment including electronic theodolites, and data collectors, Global Positioning System (GPS) receivers, and a digital "Softcopy" photogrammetric workstation. The projects for photogrammetry and survey include collecting topographic data; producing digital orthophotographs; delineating 1% frequency floodplains; mapping dam sites; providing photogrammetric ground control; collecting hydraulic cross-section data for modeling; and establishing precise location information for irrigation wells. The capabilities of the Section also provide support for the Dam Safety Section in determining hazard classifications and breach routings as well as determining if structures should be included in the Dams Inventory. The Photogrammetry and Survey Section maintains an automated database of benchmark information as well as maps identifying the location of the benchmarks. |
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