| The caissons spent this extra hour on the parking place in front of the dam. |
| The housing consists of prefabricated concrete caissons which are inset in the lagoon floor and contain service tunnels and machinery. |
| It's a combined highway and transit construction project and requires drilling foundation caissons in areas with underground utilities. |
| Concrete grade beams spanning between the caissons were used to accommodate external envelope conditions and elevator pits. |
| The caissons, with concrete compressive strengths of 5000 to 6000 psi, were in good condition and are being reused. |
| The caissons themselves are socketed into rock located 1.2 or 2.4 m below ground, depending on the location. |
