Temperature sensors keep Lambeau tundra just right
GREEN BAY, Wis. (AP)
Temperatures are expected to be in the teens when the game starts at 7 p.m. Lambeau's underground heating system will keep the turf from freezing. Below the surface, a network of plastic pipes containing antifreeze, covered by a foot of sand, make the field of natural grass and artificial fibers playable.
The entire system is monitored by temperature sensors in the field. The Green Bay Press-Gazette (http://gbpg.net/Un2xVf ) says the grounds crew uses a central control system to make adjustments if necessary. The system is designed to keep the turf at 55 degrees when the temperature dips to zero.