It is your responsibility that the water point provide
PART A - MISSION WATER REQUIREMENTS
Situation. You are the water section NCOIC of an S&S Company. The
company commander briefed you on the Operation Plan (OPLAN).
You have six 600-GPH ROWPUs, three E-5 team
chiefs, twelve E-4s and below.
Your mission is to establish three
water points, one water point for each brigade support area (BSA)
with two 600-GPH ROWPUs at each water point. The environment you are
to operate in is a tropical zone. The commander told you the ration
policy is B-Ration, MRE, and B-Ration.
After checking FM 10-52 and
coordinating with the Division Materiel Management Center (DMMC), you
have determined the daily gallons-per-man requirement is 8.9.
five freshwater sources within the area of operations that meet the
standards for the equipment. You have coordinated with the DMMC for
rations and administrative support.
Mission water requirements are normally computed by the DMMC for the
However, certain conditions may dictate that you have
the capability to compute this estimate.
An estimate of the total daily demand (TDD) is determined by
multiplying the consumption factor by the supported troop strength.
12,000 soldiers X 9 (8.9 rounded off) =
108,000 gallons-per-day (TDD).
The purification requirement is determined by dividing the TDD by the
daily production capability of one purification unit. The capability
depends on the rating of the purification unit, the temperature and
hours with 4 hours of maintenance. The 600-GPH ROWPU can produce 600
GPH on saltwater sources and a maximum of 960 GPH on freshwater and
brackish water sources.
At a raw water temperature of 50 degrees
Fahrenheit and below, the ROWPU production capability will be reduced
by 50 percent.
960 (GPH) x 20 hours =
19,200 gallons-per-day (GPD) for each ROWPU.