The nation celebrated completion of Interstate 90 after contractors paved the last four-miles of freeway near Blue Earth in 1978. Reminiscent of the "Golden Spike" that symbolized completion of the nation's first transcontinental railroad in 1869, . . . — — Map (db m178485) HM
A Golden Dedication for I-90
The nation celebrated completion of Interstate 90 after contractors paved the last four-miles of freeway near Blue Earth in 1978. Reminiscent of the "Golden Spike" that symbolized completion of the nation's first . . . — — Map (db m96915) HM
With the Louisiana Purchase in 1803, the United States acquired a vast area west of the Mississippi River. Eager for information about its new territory, the government dispatched a series of explorers to learn more about the land and the native . . . — — Map (db m178486) HM
Ice Age Beginnings
The prairie landscape was formed by glaciers and their melting waters. The soil began as rock pulverized by these glaciers. The sand, silt and clay particles form a soil matrix. Nearly two thirds of the soil matrix is . . . — — Map (db m196202) HM
The Big Sponge
Minnesota's original tallgrass prairie spread over a rolling landscape marked with countless small ponds and wetlands called prairie potholes. When snow melted or rain fell, this landscape promptly soaked up the water – like a . . . — — Map (db m196194) HM
