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Garreg-Ddu Reservoir, Elan Valley Water Scheme

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Digital copy of an albumen print from Edward Hubbard Collection showing the Garreg Ddu Dam, Bridge Pier and culvert outlet, taken September 1898.

Digital copy of an albumen print from Edward Hubbard Collection showing Garreg Ddu from the right bank looking upstream, taken May 1898.

Digital copy of an albumen print from Edward Hubbard Collection showing Garreg Ddu looking upstream from road, taken September 1897.

Garreg-Ddu dam, reservoir and valve tower, Caban Coch reservoir and Nantgwyllt Church at Elan Valley. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Nantgwyllt church and Garreg-Ddu dam, valve tower and reservoir at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Garreg-Ddu dam, valve and reservoir and Coed-y-Foel pill boxes at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Garreg-Ddu dam and reservoir, and Coed-y-Foel pill boxes at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Garreg-Ddu reservoir at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Nantgwyllt church and Garreg-Ddu dam, valve tower and reservoir at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

Garreg-Ddu dam, valve and reservoir and Coed-y-Foel pill boxes at the Elan Valley water scheme. Oblique aerial photograph taken during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 3rd June 2015.

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