CONCENTRATION OF CREDIT RISK (Tables)

9 Months Ended

Sep. 30, 2012

Summary Of Significant Customers And The Percentage Of Total Revenue For The Specified Time Periods Derived From Such Customers

The following is a list of significant customers (representing at least 10% of revenue for the periods reported) and the percentage of total revenue for the specified time periods derived from such customers:

Site Leasing Revenue	For the three months ended September 30,						For the nine months ended September 30,
	2012			2011			2012			2011
AT&T		23.0	%		27.0	%		23.8	%		27.0	%
Sprint		22.0	%		21.8	%		22.7	%		22.1	%
T-Mobile		15.4	%		11.2	%		13.9	%		11.3	%
Verizon		13.3	%		15.7	%		13.7	%		15.6	%
Site Development Consulting Revenue	For the three months ended September 30,						For the nine months ended September 30,
	2012			2011			2012			2011
Ericsson, Inc		17.6	%		0.3	%		20.6	%		0.9	%
Alcatel-Lucent		10.7	%		0.0	%		10.0	%		0.0	%
Verizon		9.8	%		18.0	%		12.0	%		17.4	%
Nsoro		5.9	%		4.0	%		6.1	%		10.7	%
T-Mobile		2.6	%		10.3	%		5.7	%		9.3	%
Site Development Construction Revenue	For the three months ended September 30,						For the nine months ended September 30,
	2012			2011			2012			2011
Ericsson, Inc		26.9	%		6.4	%		19.2	%		8.5	%
Nsoro Mastec		23.5	%		48.0	%		26.5	%		43.4	%
Overland Contracting		10.9	%		5.6	%		9.5	%		7.0	%