Hi,
You can _just_ see the edge of the surface over the grassy banks from my Mapilliary survey - driving rather than walking as the weather was foul on that visit.
https://www.mapillary.com/map/im/-TalemJN_CoZycNvlJwA9A

The covered reservoir to the South is higher, as the land rises towards the back of the station.

Happy Mapping,

James