River Gipping
The River Gipping is the source river for the River Orwell in the county of Suffolk in East Anglia, England, which is named from the village of Gipping, and which gave its name to the former Gipping Rural District. The name is unrelated to the name of Ipswich. It rises near Mendlesham Green and flows in a south-westerly direction to reach Stowmarket. From there it flows towards the south or south east, passing through Needham Market and a number of villages to reach Ipswich, where it becomes the Orwell. The river has supplied power to a number of watermills, several of which are still standing. None are operational, although the mill at Baylham retains most of its machinery, and is the only complete mill on the river.
Gunpowder River
The Big Gunpowder, long, begins in the extreme southern part of Pennsylvania's York County. From there, the Gunpowder flows in a generally southeast direction through the length of Baltimore County past the Perry Hall Mansion and the site of its former plantation until it reaches Joppatowne where it is joined by the Little Gunpowder and the Bird River, becoming simply the "Gunpowder River" once it passes the Amtrak train bridge that runs from Chase to Joppa. Joppa was an important deep-water seaport and rival to the port of Baltimore in colonial American times, until sedimentation of the Gunpowder River caused by upstream development made its harbor inaccessible to large ships.