Specifications include, but are not limited to: This RFP will replace the existing rock retaining walls on the north side of the TRPA building, located at 128 Market Street, Stateline, NV. • The larger wall separates the top-level general parking lot and a driveway accessing the second level (below grade) of the building. The existing wall does not meet current Douglas County regulations so a simple stacking of boulders will not suffice for the taller sections. • The lower wall separates driveway access to the lower and middle levels of the building. That wall is shorter, and the taller sections were addressed when an extension was added to the building. • The overall design should be consistent for the full length of the walls with consideration for appearances and consistency with the building and surrounding area