Under this chapter, the term "improvement" shall include the installation, construction, planting and/or acquisition of any public or private: (1) landscaping, including trees, shrubs, flowers, groundcover, grass or other ornamental and/or erosion control or privacy or buffer vegetation, irrigation systems and controls, statuary, fountains, water features or other ornamental structures, fencing, soundwalls or other barriers, lighting facilities and related signage; (2) streets, including any street, highway, road, alley, lane, boulevard, pedestrian mall, parkway, bicycle or pedestrian path, trail, gutters, sidewalks with or without curbs and gutters, or other way dedicated to or used for travel and all appurtenances including medians, soundwalls, traffic signals and warning devices, street signs and street lights; (3) parks, including recreational facilities, play fields, park or recreation administrative or neighborhood community center facilities, open space, hiking trails and access points; (4) sewer facilities, including drains, tunnels, sewers, conduits, culverts, and channels for drainage purposes; with necessary outlets, manholes, catch basins, flush tanks, septic tanks, disposal plants, connecting sewers, ditches, drains, conduits, channels, treated effluent dispersal sites and appurtenances; and (5) flood control and storm drainage facilities, including, pipes, mains, channels, bulkheads, retention and detention basins, drop inlets, headwalls, dikes, levees, rip rap, vegetation and appurtenances.