Small .48 liter lock'n lock cache with room for small items. Located next to the remains of what was going to be a cold war missile radar site.
The site was part of the SENTINEL ballistic missile defense system. This site was one of two types of radar used in the system: the Perimeter Acquisition Radar. The Perimeter Acquisition Radar is a long-range, phased array radar. If completed, the radar would have faced north and provided surveillance over the polar region. It would have been able to detect and track multiple targets. Once the preliminary trajectories were computed, they would have been passed to the Missile Site Radar (MSR) complex located at Camp Curtis Guild. The MSR site contained the data processing systems along with the Spartan and Sprint launchers used to intercept the missile warheads. The Sharpners Pond location was known as the Boston Sentinel PAR Site.
The contract for construction of a portion of the Boston PAR was awarded to George T. Brox, Inc. Dracut, MA on September 24, 1968. The contractor's bid was $767,242. After Richard Nixon's inauguration in January of 1969, he announced that a that a thorough review of the SENTINEL System would be performed. The order to stop construction was issued February 6th, 1969.
View of the South side of the building.
First Floor Plan of a Similar Facility
Note: The excavations that you see are of the radar building and the power station. They are not missile silos. The site is sometimes mistakenly referred to as a Nike site. It was actually part of the Sentinel Program which used the long range Spartan missile and the short range Sprint missile. Not the Nike missile. The Nike missile system was designed in the 1950's as an anti-aircraft weapon. By the 1960's, the Soviet nuclear force had evolved to primarily use intercontinental ballistic missiles and the Sentinel anti-missile system was the response.
The original name of this cache was Mr. Humphries Quarry. After learning of the site's history, I decided to rename the cache to reflect it's past.