Mount Rushmore Stone Hoop Garden   4

Background
The National Park Service (NPS) is conducting a market survey to determine the interest and capability of contractors for a possible upcoming project. The project aims to install a Stone Hoop Native Plant Garden at Mount Rushmore National Memorial in Keystone, South Dakota. The garden is intended to serve as a bridge of learning between Native American cultures and park visitors. The project includes various construction tasks such as site preparation, concrete flatwork, natural stone retaining wall, imported clean fill dirt, decorative concrete flatwork, boulder installation, drain inlets, curbing, stamped colored concrete, and installation of commercial grade aluminum fencing.

Work Details
The construction tasks for the Stone Hoop Native Plant Garden include:
- Site preparation
- Concrete flatwork for visitor access
- Installation of a 4 feet high natural stone retaining wall
- Imported clean fill dirt
- Retaining wall with aluminum railing
- Accessible decorative concrete flatwork
- Construction of approximately sixty (60) linear feet of tapered dry laid stacked 'Gold Creek' boulder
- Installation of three (3) drain inlets at the surface of finished concrete using daylighted PVC drains
- Forming and finishing approximately sixty-five (65) linear feet of six-inch-wide curb in a true 20’ diameter circle to form the perimeter of the stone hoop garden
- Demolition of approximately seven (7) linear feet of 6” concrete curb at entrance of garden
- Forming and finishing approximately four hundred fifty square feet of 5” thick 4000 PSI decorative stamped colored concrete with #4 bar set at 18” on center throughout
- Providing and installing approximately 75 ft of 42” commercial grade aluminum fencing using posts set in 24” deep and 12” diameter concrete footings below the surface of finished concrete.

Period of Performance
The anticipated period of performance is for work to commence during the month of September and be completed within 65 days. Submittals and material ordering may be accomplished prior to work on site.

Place of Performance
The construction projects will be performed at Mount Rushmore National Memorial in Keystone, South Dakota.