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Mounds View Stormwater Pond Assessment <br />2 METHODS <br />July 2023 <br />2.2 DATA COLLECTION <br />The ponds described in the previous section were surveyed in the spring and summer of 2022. The <br />purpose of the surveys was to collect updated information on pond geometries and sedimentation. This <br />data was collected by Stantec staff. All ponds were inspected for debris/trash, infrastructure condition, <br />and other minor maintenance items. Wet ponds and potential wetlands were also surveyed for sediment <br />depth. For dry basins, staff surveyed the basin using a GPS unit and, for wet ponds and wetlands, <br />Stantec staff took bathymetry measurements of the top and bottom of accumulated sediment. Data <br />collection methods are described in the following sections. <br />Dry basins have no permanent pools and function primarily for temporary water storage with gradual <br />release from the basin or infiltration. The hydraulic residence time in dry basins is typically shorter than in <br />wet ponds so there is less opportunity for particulate settling or infiltration of pollutants. The dry detention <br />basins in this study therefore were not included in the analysis done for the wet ponds. Table 2.2 shows <br />the data that was collected for each basin. <br />6 <br />