It is the intent of this section to permit the use of water frontage for boat moorage and the construction of reasonably appropriate waterfront facilities on waterfront lots, while at the same time ensuring that such right be exercised in a manner to cause minimum interference with the rights of adjoining property owners to reasonable access to their waterfront structures and to prevent undue interference by piers and moorages and structures to the waterfront use and view from adjoining properties.
(1)
Moorage, Moorage Facilities and Bulkheads. Moorage of boats, moorage facilities, including piers, wharves, platforms, ramps, dolphins, buoys, and quays for the moorage or temporary storage of private pleasure boats, or aircraft, and bulkheads or quays for the prevention of shoreline erosion are permitted on waterfront lots, subject to:
(a)
Approval of appropriate government agencies, having jurisdiction in the matter;
(b)
Approval of the town building official or other person to whom this responsibility may be delegated by the mayor as to structural stability and safety of the structure;
(c)
Approval of the hearing examiner, federal and state authorities, when required, in compliance with the requirements of this title and state law regarding development on and adjoining the shorelands of Lake Washington; and
(d)
Approval by the hearing examiner to assure that the intent of this section has been met; provided, that such approval shall not be required for the repair of waterfront structures which conform with all of the requirements of the zoning code or for the repair of nonconforming waterfront structures if such repair does not exceed the limits on repair to nonconforming structures established in the zoning code.
(2)
Setback from Side Lot Line. Private piers or other moorage facilities shall be set back 10 percent of the lot width at the waterfront with a minimum of 10 feet from the side property lines, including lakeward extensions of the property lines except when, by the mutual agreement of adjoining property owners, set forth by reciprocal easement recorded with the King County auditor, moorage facilities for use by both property owners may be built on or straddling the common side line of the adjoining owners' property.
(3)
Length Limit and Storage Boxes, Moorage Facilities. Piers shall be permitted to extend waterward a maximum of 100 feet from the shoreline and one storage box only shall be permitted on a pier which shall not exceed two feet in height and contain 40 cubic feet or less, all dimensions being calculated from the exterior surface of said structures.
(4)
Covered Moorage Building Zone (see illustration, Appendix C[1]). The covered portion of a moorage facility shall be limited to the zone bounded by the shoreline, a line 100 feet beyond the shoreline, a setback from each side lot line equal to 10 feet or 10 percent of the lot width, measured at the shoreline, whichever is the greater, and portions of the sides of a triangle of which:
(a)
The altitude lies along the lot centerline;
(b)
The base, drawn at right angles to the altitude, crosses the lot centerline, where it intersects with a straight line that connects the points where the side lot lines join the shoreline. The ends of the base line lie on the side lot lines or extensions thereof; and
(c)
The sides are drawn to form an equilateral (equal-sided) triangle, except that, if the vertex of the triangle so drawn is less than 100 feet from the base line of such triangle, an isosceles triangle (two equal sides) shall be drawn with an altitude of 100 feet.
(5)
Height Limit, Waterfront Structures. Pier decks shall not be less than one nor more than four feet above Lake Washington high water level datum, which is 22 feet above mean lower low water of Puget Sound as established by the U.S. Army Corps of Engineers, which corresponds to the elevation of 28.93 feet as determined by the Sea Level Datum of 1929. Covers over moorage and/or moorage facilities shall not exceed a maximum height of 16 feet above the Lake Washington high water level datum.
(6)
Covered Moorage Area Limit. Covered moorage structures in no event shall exceed in projected area more than 50 percent of the covered moorage building zone, or 1,200 square feet, whichever is the lesser. Where a covered moorage is built pursuant to the agreement of adjoining owners and subject to the limitations of such an agreement, the covered moorage area shall not exceed the sum of such areas permissible for each of the individual zoning lots, and the covered moorage zone shall be deemed to include the zones established for each building lot augmented by the area between such zones formed by adjacent sides of such zones, the shoreline, and a straight line connecting the outermost points of the respective zones.
(7)
Bulkheads.
(a)
No bulkhead shall be constructed beyond the existing shoreline. All bulkheads shall mate with the respective neighbors' bulkheads at the lot line, if such bulkheads already exist.
(b)
All existing bulkheads shall be deemed to be constructed as a matter of right and may be replaced or repaired, but such replacing or reconstructions shall not extend further into the lake than the said existing bulkheads.
(c)
The height of any bulkhead shall not be greater than three feet above Lake Washington high water level datum which is 22 feet above mean lower low water of Puget Sound as established by the U.S. Army Corps of Engineers, and when connecting to existing bulkheads, shall have a gradual height transition to meet evenly with the height of any existing adjacent bulkheads at the lot line.
(d)
Where a bulkhead line was established in any zone or district by a plat approved prior to the effective date of the ordinance codified in this title, then such line shall be deemed to be the permissible location for any bulkhead constructed in such plat. The required front yard for any waterfront lots in such plat shall be measured from such bulkhead line, rather than the shoreline. No structure extending above grade shall be constructed or placed in any such front yard in such plat.
(8)
Construction Requirements. All waterfront structures built over water shall be constructed on piles or floats and utilize dimensioned lumber or other rigid, finished, manufactured materials. No piling shall extend higher than five feet above a pier or wharf deck, except for specific uses such as the mast of a derrick or hoist for lifting boats out of the water, for post hoist for cradling small boats when housed within a covered moorage, or for diving platform or slide. Piling may be used to support a roof. No roofed waterfront structure shall have sides whether permanent or temporary. Pitched or sloped roofs shall not be designed or constructed so as to constitute sides.
(9)
Boat Hoists. Hoists for boats up to 30 feet in length and/or 10,000 pounds are permitted, provided they are located within the setback requirements of subsection (2) of this section.
(10)
Aircraft Moorage. One single engine aircraft may be moored at a building lot in accordance with setback requirements.
(Ord. 212 § 8(A), 1988; Ord. 271 § 3, 1994; Ord. 275 § 2, 1994; Ord. 306 § 1, 1995; Ord. 315 § 3, 1996; Ord. 422 § 9, 2003; Ord. 471 § 1, 2008; Ord. 584, 2025)