The New Statistical Account of 1845 refers to it as having been partially drained.
The following counties are at least partially drained by the Fox River:
Besserudkjernet was partially drained in 1928, but the hotels, which received their water from the lake, would not allow draining the following years.
The estuary, which had been closed to navigation since the early modern era, was partially drained and cleared in the 19th century.
The Oderbruch was partially drained and populated in the 18th century.
It was partially drained in the 18th century, and people started to live in the new area.
The marsh was partially drained by local farmers, leaving a peat bog.
The marshes were partially drained for grazing of cattle, sheep, and horses in the 1970s.
By the 19th century, the fen had become very boggy and was partially drained to help avoid disease.
Philip also had the marsh partially drained, as is attested by the writer Theophrastus.