First Day of Issue = September 9, 2006
Size: 28.00 mm x 34.00 mm
Quantity printed = 500,000
Perforated 10.00 x 11.50
Print method: Lithography

Stamp shows the cliffs of Staburags that were covered up in 1965 when a hydroelectric dam was built on the Daugava river.

Catalog numbers
Scott 658
Michel LV 681

For more information check out the links below
Staburags I
Staburags II