New product announcements: 01/06/2010 GNSS Receiver: Improved Surveying Capabilities The GRX1 global-navigation-satellite-system (GNSS) receiver from Sokkia features an updated SCH250 data collector, which is compatible with the latest edition of Spectrum Field Survey Software. As a part of a larger GNSS network, the receiver greatly increases the precision of measurements and has new features to improve its data-logging capabilities. It has three means of wireless communication to ensure connectivity: digital UHF radio, GSM/GPRS modem and a Bluetooth module. Data also can be collected via a built-in memory-card slot. Sokkia Corp.; 913-492-4900; www.sokkia.com Portable Truck Scale: Weigh Loads at the Site
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.