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Altnaheglish reservoir is a modern reservoir dam located near Limavady in County Londonderry, Northern Ireland. The dam was constructed to serve the water supply needs of the local area, representing twentieth-century infrastructure development in the region. The site is protected as a monument of historical significance by the Historic Environment Division under reference 12674, reflecting its importance to the area's modern heritage.
The reservoir is founded upon bedrock of the Argyll Group, a sequence of metamorphic rocks formed during the Neoproterozoic era. This geological foundation comprises psammite, semipelite and pelite—metamorphosed sandstones, siltstones and mudstones that provide a stable base for the dam's construction. The underlying geology is characteristic of the Dalradian metamorphic basement that underlies much of northern County Londonderry and southern County Donegal.
As a functional water management structure, Altnaheglish reservoir exemplifies the civil engineering solutions developed in modern Ireland to meet the demands of growing populations and agricultural needs. The dam's designation as a protected monument recognises both its engineering significance and its place in the landscape's recent history.
Altnaheglish reservoir. reservoir dam is a scheduled monument protected by Department for Communities NI under reference 12674. View the official record →
Altnaheglish reservoir is a modern reservoir dam located near Limavady in County Londonderry, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 12674.
Altnaheglish reservoir. reservoir dam dates from the modern period, and is classified as a reservoir dam. It is one of over 32,000 scheduled monuments protected across the UK.
Altnaheglish reservoir. reservoir dam is a Scheduled Ancient Monument, legally protected by DfC Northern Ireland (NISMR) — the body responsible for designating and safeguarding heritage sites in Ni. The official designation reference is 12674.
Several scheduled monuments lie within 10 km, including Possible court tomb (1.7 km), Possible portal tomb (1.8 km), Court tomb (3 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Altnaheglish reservoir. reservoir dam's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Altnaheglish reservoir. reservoir dam stands on Argyll Group, bedrock that formed in the Neoproterozoic. The rock here is psammite, semipelite and pelite.