For the purposes of the Washington state public works law, chapter 39.12
RCW, landscape construction involves the beautification of a plot of land by changing its natural features through the addition or modification of lawns, trees, bushes, etc.
(1) Landscape construction includes:
• Constructing or maintaining lawns, yards, gardens or other landscaped surfaces.
• Mixing and spreading mulches, ground covers, soil amendments, decorative bark or decorative rock.
• Seeding, sodding or hydroseeding.
• Applying chemicals or fertilizers.
• Planting trees, shrubs or plants.
• Installing, servicing or repairing above ground lawn or landscape sprinkler systems.
• Installing, servicing or repairing underground lawn or landscape sprinkler systems to a maximum depth of three feet below finish grade.
• Assembling or placing premanufactured trellis work, play equipment, benches or picnic tables.
• Constructing rock walls to a maximum height of four feet.
• Land clearing.
• Spreading top soil to a maximum depth of six inches below finish grade.
• Trenching to a maximum depth of three feet below finish grade.
• Installing french drains or other subsurface water collection systems to a maximum depth of three feet below finish grade.
• Hauling top soil, plants or other landscaping materials in trucks with only one rear axle.
(2) Landscape construction does not include:
• Any activity or task (including those mentioned above) when performed preparatory to any nonlandscaping construction work.
• Constructing roads, footpaths, trails or rock walls more than four feet high.
• Custom fabrication of trellis work, play equipment, benches or picnic tables.
• Constructing restrooms, shelters or similar structures.
• Installing sewer systems, storm sewer systems, catch basins, vaults or drainage systems for impervious surfaces (such as parking lots).
• Installing drainage systems or underground sprinkler systems more than three feet below final grade.
• Land clearing, dozing, grading, excavating or hauling except as permitted above.
• Tree falling or bucking.
• Subgrade preparation.
• The use of power equipment with more than ninety horsepower.
• The use of trucks with more than one rear axle except hydroseeders.
• Demolition of structures.
• Asphalt or concrete work except incidental anchorage for play equipment, benches or picnic tables.
• Installing agricultural irrigation systems.
• Encapsulation of landfills.
[Statutory Authority: Chapter 39.12
RCW, RCW 43.22.270
. WSR 00-15-077, § 296-127-01346, filed 7/19/00, effective 7/19/00.]