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On This Day | June 20

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2006
Campos Novos Dam brakes

The Campos Novos Dam is a hydroelectric dam in the Santa Catarina state in southern Brazil. In 2006, at 200 metres (660 ft) dam height, it was regarded as the third highest dam of this type (concrete-faced rock fill dam or CFRD) in the world, but, in June 2006, the water which it held back ran out following a break in the dam wall.

1990
5261 Eureka discovered

5261 Eureka is the first Mars trojan discovered. It was discovered by David H. Levy and Henry Holt at Palomar Observatory on 20 June 1990.

1978
1978 Thessaloniki earthquake

The 1978 Thessaloniki earthquake occurred on June 20 at 23:03 local time. The shock registered 6.5 on the moment magnitude scale, had a maximum Mercalli intensity of VIII (Severe), and was felt throughout northern Greece, Yugoslavia and Bulgaria. It was the largest event in the area since the 1932 Ierissos earthquake.

1887
Second Tay Bridge opened

Almost immediately following the Tay Bridge failure, the North British Railway company began to develop plans for its reconstruction or replacement. The second Tay Bridge is a straightforward pier-and-lattice girder bridge; aside from its considerable length, it lacks any distinguishing characteristics. It has an overall length of 10,780 feet (3,290 m), which is covered by a total of 85 spans. The second Tay Bridge has remained in use to the present day. During 2003, a £20.85 million strengthening and refurbishment project on the bridge won the British Construction Industry Civil Engineering Award, in consideration of the staggering scale and logistics involved.

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