PUBLIC LAW 102-580—OCT. 31, 1992 106 STAT. 4845 present time due to significantly changed physical, biological, demographic, or economic conditions, with particular reference to modify- mg the project or its operation for improving the quality of the environment, improving protection of the aquifer, and improving the integrity, capability, and conservation of urban water supplies affected by the project or its operation. SEC. 310. REND LAKE, ILLINOIS. (a) STUDY. — The Secretary shall conduct a study on whether or not to relieve the State of Illinois of the requirement to make annual payments for unused water supply storage in Rend Lake on the Big Muddy River in Illinois. (b) REPORT.— The Secretary shall transmit to Congress a report on the results of the study conducted under subsection (a), together with recommendations for any conditions which the Secretary considers to be appropriate if the State of Illinois is to be relieved of the requirement to make the annual pa3nnents referred to in subsection (a). (c) INTERIM PAYMENTS. — Until 6 months after the date on which the Secretary transmits to Congress the report under subsection (b), the State of Illinois shall not be required to make any payments under its contract with the United States for use of storage space for water supply in Rend Lake on the Big Muddy River in Illinois. SEC. 311. PORTUGUESE AND BUCANA RIVERS, PUERTO RICO. Section 31 of the Water Resources Development Act of 1988 (102 Stat. 4030) is amended by striking "temporarily residing and". SEC. 312. UTTLE GOOSE AND LOWER GRANITE, WASHINGTON. (a) MEASURES.— The Secretary is directed to undertake such measures as are necessary to compensate for damages caused to public and private property by the arawdown undertaken in March 1992 by the United States Aj*my Corps of Engineers at the Little Goose and Lower Granite projects in Washington. The costs of such measures shall be considered project costs and shall be allocated in accordance with existing cost allocations for the Little Groose and Lower Granite projects. (b) AUTHORIZATION OF APPROPRIATIONS. —In addition to amounts previously appropriated, there is authorized to be appropriated to carry out this section $8,000,000. Such sums shall remain available until expended. SEC. 313. SOUIH CENTRAL PENNSYLVANIA ENVIRONMENTAL RES- TORATION INFRASTRUCTURE AND RESOURCE PROTEC- TION DEVELOPMENT PILOT PROGRAM. (a) ESTABLISHMENT OF PROGRAM. —The Secret€iry shall estab- Ush a pilot program for providing environmental assistance to non- Federal interests in south central Pennsylvania. Such assistance may be in the form of design and construction assistance for waterrelated environmental infrastructure and resource protection and development projects in south central Pennsylvania, including projects for waste water treatment and related facilities, water supply, storage, treatment, and distribution facilities, and surface water resource protection and development. (b) PUBLIC OWNERSHIP REQUIREMENT.— The Secretary may provide assistance for a project under this section only if the project is publicly owned.