My Dam Stamps

Portugal
Portuguese Dams
April 19, 2007
Alto Lindoso Dam (a concrete double curvature arch dam on the Lima River)
Valeira Dam (a concrete gravity dam on the Douro River)
Aguieira Dam (a concrete multiple arch dam on the Mondego River)
Castelo de Bode Dam (concrete arch-gravity dam on the Zêzere River)
Se-tenant view of both the dams and the reservoirs.

Turkey
Inauguration of the Sariyar Dam
December 2, 1956

Sariyar Dam is a concrete gravity dam. It is 2 kilometres west of the town of Sariyar and is 125 kilometres west of the city of Ankara. The power station has four 40 MW turbines.

Luxembourg
EUROPA –Haute Sure Natural Park
May 17, 1999

The Haute Sure Natural Park is a national park located in the Oesling region. At the heart of the park is the Haute Sure Lake created by the Esch-sur-Sure Dam. The 50 m-high concrete arch dam was operational since 1957, and its two 5.5 MW turbines were commissioned in 1963.

Egypt
The 100th Anniversary of the Aswan Dam
August 15, 2002

The Aswan Dam is an embankment dam built across the Nile at Aswan, Egypt between 1898 and 1902, and the High Dam was constructed between 1960 and 1970.

France
Technical Achievements - Donzere-Mondragon Dam
October 6, 1956

The Donzère-Mondragon Dam is a gravity dam at the southern end of the Donzère-Mondragon canal. Its hydroelectric power station was commissioned in 1952. It was registered as a historic monument in France in 1992.

Morocco
Ait Aadel Dam
March 3, 1967

The Ait Aadel Dam is 60 kilometers east of Marrakesh. It was completed in 1967 and was mainly for water storage.

Egypt (UAR)
Aswan High Dam
January 9, 1960
This pair of stamps mark the beginning of the construction of Aswan High Dam. The unique design consists one word-only stamp (10M) explaining the benefit of the project and one stamp (35M) showing an architectural rendition of the new dam.

Zaire (Democratic Republic of the Congo)
Inga Dam First Phase
November 27, 1972
The Inga Dams are two hydroelectric dams connected to one of the largest waterfalls in the world, Inga Falls. They are located 224 kilometers southwest of Kinshasa where the Congo River drops 96 meters. This set of three stamps mark the completion of the first phase of the project. The second phase of the project was completed in 1982.

Germany (DDR)
Rappbodetalsperre (Rappbode Dam)
January 21, 1986
The Rappbode Dam is the largest dam in the Harz region as well as the highest dam in Germany. It is a gravity dam with a height of 106 meters and a length of 415 meters. The construction was completed in 1959.

Belgium
Tuberculosis semipostals – Dam of the Vesdre
December 15, 1952
Dam of the Vesdre is a curved gravity dam completed in 1950. It was designed for hydroelectricity and freshwater supply to the Eupen and Liege areas. The reservoir, Lake Eupen, is open for sailing.

Mexico
Major Engineering Projects: El Cajon Dam
December 28, 2007

The El Cajón Dam is a rock-filled concrete face dam on the Río Grande de Santiago in the Mexican state of Nayarit. Construction began in 2003 and was completed in June 2007. It is 640 meters long and 178 meters high. The hydroelectric power station is equipped with two 375 MW turbines.

Wow - I'll be dam(ned)...that's a lot of impressing dams - and beautiful stamps. My father should have seen this thread, as he was involved in several huge dam projects worldwide, including 5 years living in Pakistan on the Mangla Dam - Hindus River project.

I remember when he teased me into stamp collecting as a kid, he was very proud of this stamp:

https://en.wikipedia.org/wiki/Mangla_Dam

New Zealand
Renewable Energy - Roxburgh Dam, Central Otago
July 5, 2006
The Roxburgh Dam is the earliest of the large hydroelectric projects in the southern South Island of New Zealand. It is a concrete gravity dam with eight 40 MW turbines. The power station was commissioned over the period 1956-1962.

Southwest Africa
Water Conservation in the Desert
November 25, 1980
The Von Bach Dam is a rock-fill embankment dam on the Swakop River near Okahandja in the Otjozondjupa Region of Namibia. It was built in 1968 and commissioned in 1970.
Swakoppoort Dam is a dam 50 kilometres outside of Okahandja, Otjozondjupa Region, Namibia. It was completed in 1978.
The Naute Dam is a dam outside of Keetmanshoop in the Karas Region of Namibia. It was built between 1970–1972 and was commissioned in 1972.
Hardap Dam is a dam close to Mariental, Hardap Region, Namibia. It was built in 1962.

Laughing at myself (again).

When I found another stamp for this thread, I was so happy!

But when I did the due diligence, I quickly found that it had already been posted ... in the OP!

I'm gonna go with my scan being higher-res and, therefor, lower-redundant.

Pyhäkoski Power Plant
Catalog codes (normal paper): Mi: FI 566, Sn: FI 409, Yt: FI 543(A), AFA: FI 574A
Catalog codes (optic white paper): Mi: FI 566II, AFA: FI 574H
Issued on: 1963-01-02
Perforation: comb 11¾
Printing: Recess
Size: 34 x 24 mm
Colors: Grey black
Face value: 0.75 mk
Print run: 15,725,000
Paper: normal & optic white paper

Cheers,

/s/ ikeyPikey