THIS IS A SOURCES SOUGHT NOTICE. NO QUESTIONS WILL BE TAKEN AT THIS TIME.

Castle Clinton National Monument (CACL) was completed in 1811 as the Southwest Battery, part of the defensive system protecting Manhattan. It stood 200 feet off shore, supported by caissons and wood piers. The historic walls are constructed of red Newark sandstone. Significant water intrusion through capillary action within the stone was detected. The historic wall, comprised of porous sandstone, is deteriorating due to insufficient or inappropriate capping and through ground water penetration. Uneven settling has caused vertical and horizontal cracks and dislocation of individual stones. In addition, exposure to the elements and environmental pollutants have led to ongoing exfoliation and spalling of the stone facing. The instability of many stones presents an ongoing threat to visitors and staff. This is an extremely high-traffic area of Manhattan, as approximately 3.5 million visitors pass through the Castle annually. This Project will stabilize, conserve, repair, and restore the historic stone walls of CACL National Monument. This project includes new capping of the wall where necessary stabilization, restoration and conservation treatment of this historic and irreplaceable cultural resource. This will be accomplished through replacement, pinning and repointing throughout the historic fabric. All original fabric will be retained and conserved.

Dollar Range: $1,000,000 TO $5,000,000; Anticipated Award Date: 1st Quarter FY 20

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