 They built the first commercial structure in the City of River Falls in 1852 along the banks of the Kinnickinnic River.Foster built a sawmill and dam in 1854 which was later expanded to include a feed store and was located on the south bank of the Kinnickinnic River.Later that year, the firm of Crossman & Hart constructed a brickyard on the southern edge of the growing community along the Kinnickinnic.