History of Rochester, Kent longtitudinal timber beams provided the actual bridging structure, with cross planking to form the road surface. They constructed a substantial causeway, wide, over the marshy ground on the Strood Side of the river, extending from the river to the present day Angel Corner. In more settled times, the combination of transport links and the fertile Medway valley became the basis of a developed agricultural economy. Compared to the rest of the country there was a marked abundance of Roman villas lining the valley from Rochester down to Maidstone. During the 190s systematic earthen fortifications were established which were replaced in
Zumbro River The South Fork Zumbro River, long, rises about east of Hayfield in southern Dodge County and flows generally eastwardly into Olmsted County, where it turns northward at Rochester and flows into southwestern Wabasha County. The South Fork's course through Rochester has been channelized as part of a flood control project. It is dammed in Wabasha County, by the Lake Zumbro Hydroelectric Generating Plant to form Lake Zumbro. The Middle Fork Zumbro River, long, rises in northeastern Steele County, about west of West Concord and flows generally eastwardly through northern Dodge, southwestern Goodhue and northeastern Olmsted counties, past Pine Island and