upperriver
adjectiveUK /ˈʌpəˌrɪvə/
US /ˈʌpərˌrɪvər/
The upperriver part is the higher part of a river, near where it starts.
The upperriver water is cold and fast because it comes from the mountains.
OTHER MEANINGS
2. Located toward the beginning or source of a river.
They camped at an upperriver village far from the sea.
3. Relating to the earlier or higher section of a waterway system.
The upperriver dams control the flow for towns below.
4. Situated on higher ground along a river's course.
The upperriver fields stay dry even when the lower valley floods.