A. In General: Notwithstanding any other provisions of this title, fences, walls, and hedges are permitted around any RE rural estate, R-1 single-family residential, TC single-family townhouse and condominium, MR mixed residential, or MF multi-family residential required yard, or along the edge of any yard; provided, that no fence, wall or hedge along the sides or front edge of any front yard shall be over two and one-half feet (21/2') in height; and provided, that such fences, walls and hedges shall not be constructed of chainlink, wire or other metal materials or plastic and shall not be penetrable by light. Notwithstanding any other provisions of this title, fences, walls and hedges are permitted around any C-1 light commercial, C-2 general commercial, M-1 light industrial, and M-2 heavy industrial zones required storage or parking areas; provided, that no fence, wall or hedge along the sides or front or back edge of any storage or parking areas shall be over six feet (6') in height; and provided, that such fences, walls and hedges shall not be constructed of chainlink, wire or other metal materials or plastic and shall not be penetrable by light. (Ord. 1987-03, 1-6-1987; amd. Ord. 1998-06, 10-6-1998)
B. Retaining Walls For Residential Zoned Property: 1. Construction Requirements And Material:
a. Permittee shall be responsible for location of property lines and shall be responsible for placement of footings and walls within the property boundaries. The permittee shall also be responsible for location of any underground lines within his property.
b. Subgrade for retaining walls shall be compacted to ninety five percent (95%) of modified proctor as determined by ASTM standard D1557.
c. Concrete for footings shall attain a strength of two thousand five hundred (2,500) psi in twenty eight (28) days. The bottom of the footings shall be located a minimum of twelve inches (12") below surrounding grade of soil.
d. Reinforcing steel for concrete footings shall be deformed bars conforming to ASTM standard A617 and shall be grade forty (40).
e. Mortar for rock placement shall be type S conforming to ASTM standard C161 and C270 and shall be mixed in the ratio of one part portland cement by volume with over one-fourth (1/4) to one-half (1/2) parts of hydrated lime or lime putty by volume, and the aggregate shall be not less than two and one-fourth (21/4) and not more than three (3) times the sum of the volumes of the cement and lime used or one-half (1/2) by volume of cement, one part by volume of type II masonry cement, and the aggregate shall not be less than two and one-fourth (21/4) and not more than three (3) times the sum of the volume of the cement used.
Quicklime shall conform to ASTM standard C-5.
Hydrated lime shall conform to ASTM standard C207 and shall be type S or M.
f. The rock to be used in construction of the retaining wall shall have an abrasion wear of not more than fifty five percent (55%) as determined by ASTM standard C535 and a soundness loss of not more than twenty one percent (21%) as determined by ASTM standard C88 (magnesium sulfate solution) and the specific gravity shall be not less than 2.50.
g. Permittee shall be responsible for calling for inspections of the retaining wall during construction and the inspections shall be as follows:
(A) Prior to placement of the concrete footing, the permittee shall call for an inspection of the footing excavation and reinforcing steel placement.
(B) At approximately fifty percent (50%) completion of the rock retaining wall, the permittee shall call for an inspection of the rock placement. Rock retaining walls twenty four inches (24") or less in thickness shall have bond stoned with a maximum spacing of three feet (3') vertically and three feet (3') horizontally and if the retaining wall is of greater thickness than twenty four inches (24"), it shall have one bond stone for each six (6) square feet of wall surface on both sides.
h. Backfill material to be placed adjacent to the retaining walls shall be a granular soil. Expansive type soils are prohibited as backfill materials.
i. Any rock retaining wall required to retain more than six feet (6') of fill or required to support a sloping fill or surcharge shall be designed by a structural engineer licensed to support a sloping fill or surcharge shall be designed by a structural engineer licensed to practice as such in the state of New Mexico.
(1) In lieu of the design contained in this subsection B for rock retaining walls, permittee may submit a separate design.
(2) Any design submitted by permittee shall be designed by a structural engineer, licensed to practice as such in the state of New Mexico. The design shall be submitted with the design calculation and the drawings prepared for construction of the rock retaining wall shall be sealed with the engineer's seal.
(3) The inspection schedule shown herein shall be followed and the construction material shall conform to the specifications contained herein when a separate design is submitted.
2. Enforcement Provisions:
(1) Every violation of this subsection B constitutes an offense.
(2) Each day a violation of this subsection B exists constitutes a separate offense.
3. Enforcement Authority:
a. The code enforcement division is authorized to issue citations for violations of this subsection B and file criminal complaints in municipal court alleging violations of this subsection B.
b. The municipal court may impose a fine for each offense, not to exceed five hundred dollars ($500.00) for each day the violation is found to have occurred. In addition to any fines thus imposed, the municipal court is authorized to issue orders for removal or other judgments of the municipal court (including failure to pay fines previously imposed) shall constitute contempt of court and may be separately punished at the discretion of the municipal court. (Ord. 00-01, 1-18-2000)