http://www.globalsecurity.org/security/systems/mexico-wall.htm
As of 2005, just over 80 miles of federally enforced barriers and fencing were at strategic points on the border, mainly in Texas and California.
Homeland Security Secretary Michael Chertoff said a wall running the length of a border would cost too much. A 2,000 mile state-of-the-art border fence has been estimated to cost between four and eight billion dollars. Costs for a wall that would run the entire length of the border might be as low as $851 million for a standard 10-foot prison chain link fence topped by razor wire. For another $362 million, the fence could be electrified. A larger 12-foot tall, two-foot-thick concrete wall painted on both sides would run about $2 billion. Initially it was estimated that the San Diego fence would cost $14 million -- about $1 million a mile. The first 11 miles of the fence eventually cost $42 million -- $3.8 million per mile, and the last 3.5 miles may cost even more since they cover more difficult terrain. An additional $35 million to complete the final 3.5 miles was approved in 2005 by the Department of Homeland Security -- $10 million per mile.
As of February 10, 2012, the Department of Homeland Security had completed 651 miles of fencing out of nearly 652 miles mandated by Congress, including 299 miles of vehicle barriers and 352 miles of pedestrian fence.
Under the Secure Fence Act of 2006, Congress required that the entire border should be 100% operationally controlled by the Department of Homeland Security.
“For another $362 million, the fence could be electrified.”
And for a few million more, we can use solar energy to keep it electrified so that it is carbon neutral. If liberals trash this idea, we can call them planet killers.
I’m willing to compromise on a hybrid wall/fence vs. all wall. I hate when my liberal tendencies come forward :-).