Specifications include, but are not limited to: underground utilities improvements (e.g. structural steel, CMU, Cast-place concrete,, framing, HVAC, electrical, sewer, water, and storm) and facilities expansion and improvements (e.g. playground improvements, pavement management, streetscapes, transportation, buildings) to ensure the continued reliability of the DISTRICT infrastructure and facilities system. The work normally consists of trench excavation; removal and replacement of existing aging underground utilities and facilities; backfilling and compaction; pavement restoration and other related construction activities that require as needed special inspection such as geotechnical inspection and material testing services and other type of special inspection to ensure reliability of the DISTRICT’S utility infrastructure, buildings and facilities system.