The study area is the Las Vegas Valley in southern Nevada which has a ground- and surface-water supply system. Possible future population growth and water requirements for the area are examined. Water use projections are based on type of use and area of use predicted on land use plans and economic relationships. Area water pricing schemes are examined to disclose possible inequities in burden carried by various used groups to amortize water facilities and pay operating costs. The pricing mechanism is examined as a means of controlling water usage and providing equitable cost distribution. Water related institutions extent are examined in light of their apparent ability to exercise optimal or near optimal control over the water resources systems. An alternative institution is proposed which would enhance control and optimal use of available resources. Models of the various physical components of conjunctive water resource system are presented and are discussed in relationship to current institutional controls. (Modified author abstract)