(a) Any development of which the total cost or fair market value, whichever is higher, does not exceed the dollar threshold established or as hereafter adjusted by the state office of financial management pursuant to WAC 173-27-040(2)(a), provided such development does not materially interfere with the normal public use of the water or shorelines of the state;

(b) Normal maintenance or repair of existing structures or developments, including damage by accident, fire, or elements;

(c) Construction of the normal protective bulkhead common to single-family residences;

(d) Emergency temporary construction necessary to protect property from damage by the elements consistent with the provisions in SCC 30.44.280;

(e) Construction and practices normal or necessary for farming, irrigation, and ranching activities, including agricultural service roads and utilities on shorelands, and the construction and maintenance of irrigation structures including but not limited to head gates, pumping facilities, and irrigation channels. A feedlot of any size, all processing plants, other activities of a commercial nature, alteration of the contour of the shorelands by leveling or filling other than that which results from normal cultivation, shall not be considered normal or necessary farming or ranching activities. A feedlot shall be an enclosure or facility used or capable of being used for feeding livestock hay, grain, silage, or other livestock feed, but shall not include land for growing crops or vegetation for livestock feeding and/or grazing, nor shall it include normal livestock wintering operations;

(f) Construction or modification of navigational aids, such as channel markers and anchor buoys;

(g) Construction on shorelands by an owner, lessee, or contract purchaser, of a single-family residence for owner or owner’s family use, which residence does not exceed a height of 35 feet above average grade level, and which meets all requirements of the state and local governments having jurisdiction thereof, other than requirements imposed pursuant to this title. Construction authorized under this exemption shall be located landward of the ordinary high water mark;

(h) Construction of a dock, including a community dock, designed for pleasure craft only, for the private noncommercial use of the owner, lessee, or contract purchaser of single family and multiple-family residences. For the purpose of this section, a "dock" is a landing and moorage facility for watercraft and does not include recreational decks, storage facilities or other appurtenances. This exception applies if either:

(i) Operation, maintenance, or construction of canals, waterways, drains, reservoirs, or other facilities that now exist or are hereafter created or developed as a part of an irrigation system for the primary purpose of making use of system waters, including return flow and artificially stored groundwater from the irrigation of lands;

(j) The marking of property lines or corners on state-owned lands, when such marking does not significantly interfere with normal public use of the surface of the water;

(k) Operation and maintenance of any system of dikes, ditches, drains, or other facilities existing on September 8, 1975, which were created, developed, or utilized primarily as a part of an agricultural drainage or diking system;

(l) Site exploration and investigation activities that are prerequisite to preparation of an application for development authorization under this chapter, if:

(m) The process of removing or controlling an aquatic noxious weed, as defined in RCW 17.26.020, through the use of an herbicide or other treatment methods applicable to weed control that are recommended by a final environmental impact statement published by the state department of agriculture or the department of ecology jointly with other state or local agencies under chapter 43.21C RCW;

(n) A public or private project that is designed to improve fish or wildlife habitat or fish passage when the criteria in RCW 90.58.147 are met;

(o) Watershed restoration projects as defined in RCW 89.08.460 ; and

(p) The external or internal retrofitting of an existing structure with the exclusive purpose of compliance with the Americans with Disabilities Act (ADA) of 1990, 42 U.S.C. § 12101 et seq., or to otherwise provide physical access to the structure by individuals with disabilities.