Description and History of Site:-
Boltby Reservoir. Completed in 1882 and decommissioned 2003. It was an earth embankment with puddled clay core originally approximately 100m long and 18.7m high. It impounded 116 000 cu m. of water. Following a number of flooding events and a spillway failure on 19 June 2005 the volume of stored water was reduced in 2007 to 25 000 cu m. by cutting a 11m notch in the dam wall to create a small lake and meandering stream. A former earth embankment dam in the catchment of the River Swale with a surface water area of 2 ha and a capacity of 116 TCM (26 Mgals) at top water level of 197.5 m (648 ft) and with a depth of 13.7 m (45ft). Built originally to supply Thirsk the dam was overtopped during a inensive storm on the xxx and as a result the decision was taken to take the dam out of service. A new outpall chanel was cut through the dam embankment on the line of the old outfall.

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Key Words :- reservoir water supply dam

Address :- Boltby, Thirsk, North Yorkshire, YO7 2HS
Grid Ref :- SE 49720 88480
Co-ordinates :- Lat 54.289536 , Long -1.237697
Local Authority :- Hambleton District Council
Pre 1974 County :- Yorkshire - North Riding
Site Status :- Site extant - Protected status unknown
Site Condition :- Site disused - but otherwise substantially intact
Site Dates :- 1882 - 2003
Record Date :- 15 October 2015

Copyright :- cc-by-nc-sa 4.0 © Charles Morris