St. Croix River - Sidescan Image Mosaic, 2018: SACN 24 - SACN 30

Start Date

2018-07-16

End Date

2018-09-27

Hanson, J.L., Strange, J.M., Sattler, S.R., and Hoy, E.E., 2021, St. Croix National Scenic Riverway (SACN): Sonar Data Mapping to Assess Native Mussel Habitat: U.S. Geological Survey data release, https://doi.org/10.5066/P9X9I5QJ.

The National Park Service's (NPS) Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN) have established high value habitat corridors for threatened and endangered native mussels, including the Winged Mapleleaf and Higgins’ Eye Pearlymussel. Underwater sonar, a hydroacoustic remote sensing technology, is a valuable tool for mapping physical habitat features in aquatic systems for sedentary biota such as freshwater mussels. The U.S. Geological Survey (USGS) acquired high-resolution multibeam and sidescan sonar of the lower 48 kilometers of the St. Croix River, from the shoreline to 7.62 meters deep. Additional data was collected for two small areas of high-valued mussel habitat, which included acoustic Doppler current profiler (ADCP) and underwater videos — to help interpret and map physical habitat characteristics. Hydroacoustic technologies have the potential to identify and quantify physical habitat features to inform management decisions.

ScienceBase WMS

ScienceBase WCS

• Upper Midwest Environmental Sciences Center (UMESC)

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