El Cajón dam, Mexico, has a 188 m high concrete-face rockfill dam. The El Cajón Dam is a hydroelectric dam on the Río Grande de Santiago in the Mexican state of Nayarit. Construction began in 2003 and was completed in June 2007. It cost US$800 million to build. It is 640 m (2,100 ft) long and is 178 m (584 ft) high. The reservoir

It is one of the most extreme engineering projects in World History, to build a 35 miles long tunnel under the Alps Mountains. It is the longest tunnel in the world. This could not be possible without world’s strongest drilling machines, each more than 3 stories high and longer than 4 football fields, drilling 24hrs a day for 6 years. The project costed $7 Billion.

The Woodrow Wilson bridge spans the Potomac River on the outskirts of Washington DC and connects the states of Maryland and Virginia. The bridge carries the I-95, the most heavily traveled road on the East cost of the United States. The Woodrow Wilson Bridge is 6,736 feet (2,053 m) long and 70 feet (21 m) high.

As the GSHP systems have relatively high installation costs, it is important that geological data and knowledge is available so that costs can be minimized. Furthermore, detailed geological information like surface and sub-surface temperature, thermal properties of the soil, water table, flow direction and type of soil etc. is also required for efficient design of the system.

Ground source heat pump systems provide a viable alternative to conventional heating and cooling systems in the move towards sustainable building solutions. The most important factor for successful operation of a ground loop heat system is the rate of heat transfer between the pipe and surrounding soil.