Reservoir Feeder

[heywood]

Hello everyone,
I am looking for some help.
I see what looks as though it could be an old track or road - grassed over but the remains of an old stone wall. It doesn’t lead anywhere. It is in a hollow below the main road and stops where there is a modern building.
I looked it up on an old map and it is marked as  a ‘reservoir feeder’. On the old map, the area is open land and there is another one not far away. However, there is no reservoir in the area.
Is this part of a drainage system in case of excess rainwater? On a new property build nearby,  a balancing pond has been  included and I wondered if the reservoir feeder had a similar function.

As it has puzzled me for a while, I thought I would ask fellow rootschatters. 

Heywood

[Mike in Cumbria]

Where is it?

We have lots of reservoir feeders in this area, diverting streams over a long distance to a reservoir. Sometimes the water is even pumped over a hill to the next valley.

[heywood]

I have it marked on a different map but here it is on Old Maps. - 1893 - opposite the Highfield Inn.
https://www.old-maps.co.uk/#/Map/395015/407173/12/101394

If you move the map down slightly, the other one is marked ‘Sluice’ and ‘overflow’ on this map and there is a reservoir marked above that which is missing from my preferred map on
https://www.archiuk.com/