Tower grid is located nine miles south-west of Dog Area. The grid is centered around two munitions impact points on opposite sides of a 50 ft. artillery tower, thereby creating two circular overlapping grids. The center area of the grid has a piped vacuum system, 400 feet by 600 feet with sampling stations located every 10 feet.

The east grid consists of a series of circles having radii ranging from 22 yards to 1760 yards. The number of sampling stations varies from 360 on the inner circle to 192 on the outer rim. The 22 yard radius circle consists of 60 vertical sampling masts, the remaining samplers are at ground level.

With the exception of the 170 yard and the 1000 yard radius circles, all positions are wired for 110 volts single phase and 220 volt three phase power. Sampling equipment used is portable and remotely controlled for obtaining sequential samples.

The West grid is composed of the dense array and sampling circles, ranging from 16 yard to 220 yard radii. It contains 600 sampling positions. No power or vacuum system is installed on this grid with the exception of those portions of the circles which fall within the piped portion of the center area.

This facility is used primarily for the testing of chemical munitions and dissemination devices. Its structures include:

a. Artillery tower - This is a structural steel tower, 50 feet high, on which a 155mm howitzer or a 105mm howitzer may be mounted for firing into the arrays. Located at a distance from the base of the tower is a sand-filled pit into which shells are impacted. This impact point determines the center of each grid.

b. Rocket tower - This is a steel framework tower 325 feet high, with working levels at 200 feet, 250 feet, and 300 feet. The tower width is 6' x 6'8" with an elevator shaft enclosed by the tower sides.

Tube type rocket launchers are used to fire rockets into the impact pit.

c. A-frame - This is a steel framework 50 feet high, positioned over the West pit. It is used for dropping or firing small munitions into the impact pit.

Power for this facility is supplied by a 200 KVA generator and an 85KW generator. Three 132 cfm vacuum pumps are used on the dense piped area.       

The following grid diagram #1 and diagram #2 illustrate the center or inner and total sampling arrays of the Tower grid.