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Latitude: 52.7748 / 52°46'29"N
Longitude: -3.1065 / 3°6'23"W
OS Eastings: 325453
OS Northings: 320262
OS Grid: SJ254202
Mapcode National: GBR 71.Y7WR
Mapcode Global: WH794.7JZ4
Entry Name: By-Pass Pond and Spillway with Sluice-Gate to south of upper lock chamber
Listing Date: 5 April 1993
Last Amended: 5 April 1993
Source ID: 14186
Building Class: Transport
Community: Carreghofa (Carreghwfa)
Locality: Carreghofa Locks
Traditional County: Montgomeryshire
Probably 1821 when the Tanat Feeder was realigned to enter above the upper lock. The bypass helped regulate the water supply at N end of Montgomeryshire Canal.
By-pass pond with curving rubble revetment, culverts brick-lined with repairs in later C19 blue brick. Spillway refaced in modern engineering bricks. Paddle gear in centre of spillway; rack and pinion system built on wooden frame with separately braced ratchet catch.
Included for group value with the other canal structures in an exceptional location at Carreghofa Locks.
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