Wash. Admin. Code § 296-127-01346
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.
* 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.
* 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.
* Welding.
* Installing agricultural irrigation systems.
* Encapsulation of landfills.
Wash. Admin. Code § 296-127-01346
Statutory Authority: Chapter 39.12 RCW, RCW 43.22.270 and 43.22.051. 00-15-077, § 296-127-01346, filed 7/19/00, effective 7/19/00.