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Large Raised Reservoir (Registered information)

Publisher
Natural Resources Wales
Updated
16 September 2026
Topic
Not set
Licence
Not set

Summary

This dataset contains details of Large Raised Reservoirs.

Natural Resources Wales (NRW) collects and maintains data on reservoirs designed or capable of holding more than 10,000 cubic metres of water above the natural level of any part of the land adjoining them defined as 'large raised reservoirs' under the Reservoirs Act 1975. Two types of reservoir are maintained within the register:

  • Impounding; or
  • Non-Impounding.

This dataset is an extract from NRW’s Cronfeydd/Reservoir Database. It contains registered information about the physical characteristics and inspection regimes of the dam.

Data links

Link Format Preview Updated
Download Data – 16/9/2026
Web Mapping Services – 16/9/2026

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Additional information

Source Metadata
XML, HTML
Date added
14 September 2026
Harvest GUID
NRW_DS125216
Extent (Latitude)
53.513067° to 51.240829°
Extent (Longitude)
-5.777741° to -2.608865°
Dataset reference date (publication)
2026-09-10
Frequency of update
weekly
Access constraints
There are no access restrictions on this data. NRW may release, publish or disseminate it freely
Responsible party
Natural Resources Wales (NRW) (owner, custodian, originator, distributor)
ISO 19139 resource type
dataset
Metadata language
eng