It was realized that the new dam could take over the function provided by this first site and another small dam a short distance downriver.
A new plan for dumping sewage far out at sea via boat, rather than simply releasing it downriver, was also formulated.
That same year, a new castle was built 20km 0 downriver.
Since these rivers are being threatened at their source, they are not providing as much water for the many people that need it further downriver.
Two barges were used to transport the dredged material 19 km (12 mi) downriver and from there to a disposal site four miles offshore.
After three years of work, a 5acre m2 section of the jam broke free and scattered downriver.
Water is not abstracted directly from the tarn, but flows some distance downriver to an off-take weir.
The confluence area was too marshy to build a town, so they selected a site downriver.
