Attachment_02_-_A04_SOW_(Appendix_A_Updated_6-26-2026).pdf

This document is an appendix specifying backflow preventer replacements required for Gateway Arch National Park in Fiscal Year 2026. The appendix identifies three Watts brand backflow preventers currently installed at the park that require replacement:

1. Watts 6-inch Model 957RP, Serial # PI-1423, located at Sullivan Drinking Fountain's flush hydrants
2. Watts 6-inch Model 957, Serial # YC-2251, located at North Pond irrigation and fill, North Gateway irrigation, and drinking fountain systems
3. Watts 4-inch Model 957, Serial # PJ-0130, located at Gateway drinking fountains

Each entry includes aerial maps showing the specific locations within Gateway Arch National Park and photographs of the existing equipment in underground vault installations. The document provides equipment specifications and geographic context necessary for contractors to identify and replace the backflow preventers as part of the park's FY26 maintenance program.