CRYSTAL is designed to be a flexible, dynamic simulation model that evaluates a wide range of water supply alternatives. It can answer the following types of questions:

• What is the safe yield of the current Seattle, Tacoma, and Everett water supply systems?

• How much does the safe yield increase if Tacoma's second supply project were constructed?

• What is the average revenue from the Jackson Hydroelectric project, currently, in the future, and if a hypothetical transfer agreement between Everett and Seattle water systems

• What are the benefits to fish, tribes, Seattle, Everett of a transfer agreement between Everett and Seattle?

• For specific historical flows, how much water comes from the each river system, how much from groundwater and how much from alternative sources?

• How will the Green River and Cedar River Habitat Conservation Plans (HCPS) affect Municipal and Industrial water supplies in Everett, Seattle, and Tacoma?

• What impacts will growing demands have on instream flows and how often are these flows at the minimum flows set by the HCPs and other agreements within the region?