The U.S. military’s multibillion-dollar program to build up facilities and infrastructure on the Pacific island of Guam to handle new troops could face scope and schedule changes, based on conclusions of the program’s final environmental review, released on July 28. But local officials on the island remain concerned about the military’s growing island footprint and impacts to cultural and ecological resources.

The military’s new facilities are needed to handle the transfer of thousands of Marines and other troops and dependents from the Japanese island of Okinawa, where they are now based, as well as an influx of construction and other workers.