The contractor will provide all professional services, labor, materials, and equipment to demolish and replace concrete drainage at Building #11 (approximately 6ft x 48ft x 6 inches), including site prep, landscaping, compacting, fill, rebar, and grooving. Two optional projects are included: Option 1 replaces a 25ft x 30ft concrete pad on the south side of Building #28, and Option 2 replaces a 28ft x 90ft concrete ramp on the east side of Building #12, including new railings. The work is performed on-site at the specified buildings, with all concrete poured to run off toward the north elevation for the base project. No budget amounts or submission timelines are specified in the description.