Rock Island Dam Island Pool. Rock Island Dam is constructed on Columbia River basalt similar to that which is exposed on the cliffs near the dam. These columnar basalts were formed from lava flows during the mid- to late-Miocene Epoch, some 14 to 16 million years ago. The rock is strong and durable and provides a very stable foundation for the structure. Columbia River stream flows at the Project averaged 73,700 cubic feet per second (2090 m³/s), a decrease of 37% from 2000 and 63% of the 20 year average of 116,700 cubic feet per second (3305 m³/s). The Rock Island Hydro Project
The Floor Is Made of Lava The Floor Is Made of Lava The Floor Is Made Of Lava is a Danish rock band, formed in 2006. The band consists of Tobias Kippenberger (vocals), Simon Visti (bass), Lars Rock (guitar) and Ace (drums). In 2007 they had their debut, with the album "All Juice No Fruit", which was produced by Troels Abrahamsen of Veto. In 2010 they released their second album "Howl at the Moon", which was produced by Sebastion Wolff of Kellermensch. The band have primarily played concerts in Denmark. They've performed at Roskilde Festival, and have warmed up for bands such as Oasis, AC/DC, Nephew