§ 155.092  LANDSCAPING AND SCREENING STANDARDS.
   (A)   Purpose. To promote safety, to protect the character and stability of residential, commercial, institutional and industrial areas, to conserve the value of land and buildings of surrounding properties and neighborhoods, to foster a pedestrian environment, and to enhance the aesthetic and visual image of the community.
   (B)   Non-conformity. Existing landscaping and screening that was lawful on or before May 12, 2005, but which does not conform to the regulations of this chapter after its passage, shall be lawful non-conforming in regards to landscaping and screening.
   (C)   Exemptions. Except as stated elsewhere, all residentially zoned properties in a preliminary or final plat approved before May 12, 2005, shall be exempt from the requirements of this section. This exemption does not apply to schools, churches or government facilities on residentially zoned properties.
   (D)   Scope. The standards and criteria contained in this section are the minimum standards for all new development. Any area within a Planned Development District or Overlay District containing landscaping standards shall be regulated by the standards of the Planned Development District or Overlay District. The provisions of this section shall be administered and enforced by the Landscape Administrator of the City of Mansfield. All construction proposals, landscaping, screening and fencing shall be shown on a Landscape Plan as required by this section and in compliance with the Natural Resources Management Ordinance.
   (E)   New development. For the purpose of this chapter, new development shall include any new construction on a vacant lot; or any new construction that expands or enlarges an existing lawful nonconforming use. Any expansion or enlargement of a lawful nonconforming use shall upgrade landscaping and screening on the site to meet all applicable regulations of this section, to the extent practical. However, it is not the intent of this section to require the removal of existing permanent improvements such as buildings, screening walls, retaining walls, parking lots or other pavement in order to meet the requirements of this section. Additionally, where open space exists and plantings are required, plantings shall be provided unless in the opinion of the Landscape Administrator, the plantings are deemed impractical. The Landscape Administrator may waive the landscape requirements on a case-by-case basis if unique circumstances exist on the property that make application of these regulations unduly burdensome on the applicant. These regulations may be waived only if there will be no adverse impact on current or future development and will have no adverse impact on the public health, safety, and general welfare.
   (F)   Permits. Prior to the issuance of a building, paving or construction permit for any development other than those in the PR, SF, 2F or MH Zoning Districts, a landscape plan prepared by a registered landscape architect shall be submitted along with the applicable permit to the approving department for review. The Landscape Administrator may waive the requirement for the registered landscape architect for projects involving enlarging or altering an existing development or sites under one acre. Until the Landscape Administrator approves a landscape plan, no permits shall be issued for building, paving, or construction. Prior to the issuance of a certificate of occupancy for any building or structure, all screening and landscaping shall be in place in accordance with the landscape plan.
   (G)   Enforcement. If at any time after the issuance of a certificate of occupancy or a business license, the installed landscaping or irrigation does not conform to the landscape requirements at the time of building permit issuance, the city will issue notice to the property owner, tenant or agent, stating the violation and describing the action required to comply with this section. If the landscaping is not installed or replaced as directed, the property owner, tenant, or agent shall be in violation of this section.
   (H)   Security. Landscaping should not impede natural surveillance of property or create blind spots or hiding spots. The basic concepts of Crime Prevention Through Environmental Design (CPTED) should be used when laying out a site or planning for trees, shrubs, lighting, and fencing. The Landscape Administrator may consider alternatives to landscape plantings and plant locations when security issues are presented.
   (I)   General standards. The following criteria and standards shall apply to all landscaping, landscape materials, and installation, whether intended for residential or non-residential development:
      (1)   Development should be sensitive to its natural surroundings. The natural contours should be followed to the greatest extent possible to minimize grading. Graded slopes should be rounded and contoured to blend with the terrain.
      (2)   Develop attractive landscaping by incorporating the following criteria:
         (a)   Reduce clutter of little plants and disorganized planting.
         (b)   Establish patterns/spacing of trees to provide a visual rhythm, linear edge, and organization.
         (c)   Use a limited range of tree species to provide a unified image and cohesive character for comprehensive developments.
         (d)   Use specialty-landscaping themes to help distinguish special areas/developments.
         (e)   Use landscaping selectively to soften harsh appearance of some buildings and parking lots at sidewalks edge.
      (3)   No parking or equipment is permitted in any buffer yard, street landscape setback or any landscaped medians, islands or areas. Decorative fences and walls may be considered as part of the landscaping if coordinated as part of the overall landscape plan as long as they do not overtake the plantings.
      (4)   Signs and sidewalks are permitted in buffer yards, street landscape setback and landscape medians, islands or areas in compliance with all other aspects of the zoning ordinance. Landscaping shall be situated to prevent interference with signage; likewise ground or monument signage shall be incorporated into the landscape design to ensure compatibility.
      (5)   No portion of the required landscape setback shall be located within the street right-of-way.
      (6)   Non-living landscaping materials such as wood chips and mulch should be used in, around, and under trees, shrubs, and other plants. Rock, crushed granite and gravel may be considered landscape materials if approved by the Landscape Administrator as part of a comprehensive design theme, meeting aesthetics and functional criteria.
      (7)   Curbing or other protective devices or barriers shall be installed to protect landscape buffer strips and street landscape setbacks from vehicular encroachment. In order to accommodate drainage, curbing does not have to be continuous. No automobile or other type of vehicle shall be driven on any landscape buffer strip or street landscape setback.
      (8)   Landscaped medians or islands with raised curbs shall be used to define parking lot entrances; the ends of all parking aisles; the location and pattern of primary internal access driveways; and to provide pedestrian refuge areas and walkways.
      (9)   Plant materials shall conform to the standards of the recommended plant list in division (BB) of this section.
      (10)   During the months of June through August, only containerized trees may be planted, unless the Landscape Administrator authorizes an alternative.
      (11)   Required trees are encouraged to be placed along the south and west sides of any residential property to increase energy efficiency.
      (12)   Grass seed, sod and other materials shall be clean and reasonably free of weeds and noxious pests and insects.
      (13)   Ground shall be prepared in a manner consistent with accepted planting procedures prior to the installation of sod, grass seed or other materials.
      (14)   In all zoning districts except the PR, SF, 2F and MH Zoning Districts, plastic, rubber or nondurable edging shall be prohibited. Concrete, metal and other durable edging shall be provided between planting beds and other landscaped areas.
      (15)   Ornamental trees shall have three trunks or canes with a minimum caliper of one inch as measured six inches above grade at time of planting.
      (16)   Ornamental trees shall have a minimum crown spread of 15 feet at maturity. Ornamental trees having a mature crown spread of less than 15 feet may be substituted by grouping the trees to create the equivalent crown spread of 15 feet.
      (17)   Canopy trees shall be a minimum caliper of three and one-half inches as measured six inches above grade and seven feet in height at time of planting.
      (18)   Canopy trees shall have a minimum crown spread of 25 feet at maturity.
      (19)   Non-dwarf variety shrubs shall be a minimum of three feet in height measured above grade at time of planting. Dwarf variety shrubs shall be a minimum of two feet in height measured above grade at time of planting.
      (20)   Hedges required by this section shall be planted and maintained to form a continuous, unbroken, solid visual screen of three feet in height measured above grade within 18 months of planting. The design of the plantings may meander or curve within the required landscape setback or buffer yard.
      (21)   Landscaping, except required grass and low ground cover, shall not be located closer than two feet from the edge of any parking space.
      (22)   Evergreen vines not intended as ground cover shall be a minimum of two feet in height measured above grade at time of planting.
      (23)   Grass areas shall be sodded, plugged, sprigged, hydro-mulched, or seeded, except that solid sod shall be used on slopes and in swales or when necessary to prevent erosion. Grass areas shall be established with complete coverage within a six-month period from planting, and shall be re-established, if necessary, to ensure grass coverage of all areas.
      (24)   Grass or ground cover planted in the street landscape setback shall extend to the street pavement or curb.
      (25)   Ground cover used in-lieu-of grass shall be planted in such a manner as to present a finished appearance and reasonable completed coverage within one year of planting.
      (26)   All landscaped areas shall be irrigated in accordance with the requirements of this section. Natural areas or areas identified as "no disturbance zones" need not be irrigated.
      (27)   Earthen berms with small vertical differentials may have side slopes not to exceed three-to-one (3 feet of horizontal distance for each 1 foot of height). Earthen berms with larger vertical differentials shall be coordinated with the City Engineer for appropriate slope criteria. All berms shall contain necessary drainage provisions and be approved by the City Engineer.
      (28)   The city has final approval for the placement of all trees. With the exception of street trees, trees shall be planted as far away from public utility lines as possible while still within the required landscape area, unless approved by the Landscape Administrator and City Engineer. If approved, alternative-planting methods, such as the use of root barriers, may be required.
      (29)   Where overhead utilities exist or are planned, ornamental trees may be required instead of large canopy trees, at a replacement density of three ornamental trees for each canopy tree. No tree which has a mature height of 25 feet or greater shall be planted beneath an existing or proposed overhead utility line.
      (30)   Landscaping may be situated on or within a public utility or drainage easement provided that the plantings or improvements shall first be approved by city staff before installation, and that any public utility, including the city, shall have the right to remove and keep removed all or part of any plantings or improvements which may endanger or interfere with its respective systems within said easement and shall not be liable for damages or replacement of such growths or improvements.
      (31)   For mature trees overhanging or adjacent to streets, fire lanes or other access ways, a minimum 14 foot vertical clearance shall be maintained.
      (32)   For mature trees overhanging or adjacent to walkways and paths, a minimum nine foot vertical clearance shall be maintained.
      (33)   The property owner shall be responsible for mowing and maintenance of berms.
      (34)   All landscaping shall be maintained in a healthy and live-growing condition at all times. The following Landscaping Maintenance Note shall be placed on each landscape plan:
      "Landscaping Maintenance: The property owner, tenant or agent, shall be responsible for the maintenance of all required landscaping in a healthy, neat, orderly and live-growing condition at all times. This shall include mowing, edging, pruning, fertilizing, irrigation, weeding, and other such activities common to the maintenance of landscaping. Landscaped areas shall be kept free of trash, litter, weeds and other such materials not a part of the landscaping. Plant materials that die shall be replaced with plant materials of similar variety and size."
      (35)   Obstruction prohibited. No fence, screen, free standing wall or other visual barrier shall be so located or placed that it obstructs the vision of a motor vehicle driver approaching any street, alley or drive intersection. A visual barrier shall be deemed as any fence, wall hedge, shrubbery, etc., higher than 36 inches above ground level at the property line, except single trees having single trunks, which are pruned to a height of seven feet above ground level.
      (36)   Visibility triangle required. No fence, screen wall or visual barrier shall be located or placed where it obstructs the vision of motor vehicle drivers approaching any street or driveway intersection. At all street or driveway intersections, clear visibility shall be maintained across the lot for a proper distance along both streets or driveways as required by the Mansfield Roadway and Access Management Design Criteria.
   (J)   Xeriscaping. The use of xeriscaping is intended to promote prudent use of the city's water resources and reduce the need for additional water system infrastructure and to help ensure viability of required plantings during periods of drought. All landscaping shall comply, where feasible, with the following requirements designed to reduce water usage.
      (1)   Required plant materials shall be selected from those identified as native plants, and those that have been adapted to the local climate and conditions. Native plants and planting practices are identified through the "Texas SmartScape" program (a program developed through the North Central Texas Council of Governments {NCTCOG} Regional Storm Water Management Program). Texas SmartScape is an interactive multimedia tool on compact disk that can be used to select native and adapted plants for North Texas. The CD is available from the NCTCOG or the information may be downloaded from the NCTCOG Storm Water web site at www.dfwstormwater.com.
      (2)   Where specific conditions reduce the likelihood that these plant materials will survive, other plants may be substituted with approval of the Landscape Administrator.
      (3)   Plants not recommended in the "Texas SmartScape" program may be substituted with the approval of the Landscape Administrator. The applicant may be required to provide substantiation as to the hardiness, adaptability and water demands of the plant when used.
      (4)   For maximum reduction in water usage, xeriscape plants should not be interspersed in plant massings with plants requiring higher water usage. Applicants should design irrigation systems and watering schedules that supply the appropriate amount of water, without over-watering.
      (5)   Permeable pavement in low-traffic areas or overflow parking may be approved by the Landscape Administrator and by the City Engineer where conditions are favorable to filter storm water and reduce run-off. Adequate strength of the permeable pavement must be proven by the applicant to ensure pavement life.
   (K)   Irrigation.
      (1)   All development shall be irrigated by an underground automatic system that may include a drip irrigation system. This system shall adhere to the manufacturers' specifications and the rules and regulations established by the City of Mansfield's Landscape Irrigation Ordinance and by Texas Commission on Environmental Quality (TCEQ) or successor agency.
      (2)   An irrigation system must be designed by an irrigator licensed by the State of Texas.
      (3)   All irrigation systems shall be designed, installed, maintained, altered, repaired, serviced, and operated in a manner that will promote water conservation as defined by the Landscape Irrigation Ordinance.
      (4)   Development in the PR, SF, 2F and MH zoning districts in which the first plat was approved on or before November 12, 2012, shall be exempt from the requirements of this division (K).
   (L)   Pedestrian mobility. Walkways and paths shall be incorporated into site and landscape designs to provide for pedestrian mobility.
      (1)   In the OP, C-1, C-2 and C-3 zoning districts and the I-1 and I-2 zoning districts within the Freeway Overlay District, internal pedestrian walkways shall be provided where multiple buildings are developed in a comprehensive development.
      (2)   At a minimum, walkways shall connect to focal points of pedestrian activity including, but not limited to, street crossings, buildings and store entry points, and shall feature adjoining landscaped areas that include trees, shrubs, benches, flower beds, ground covers or other such materials. The walkways may be intersected by vehicular drives.
      (3)   Additionally, internal pedestrian walkways, not less than six feet in width, shall be provided along the full length of the building, along any facade featuring a customer entrance. Other walkways to bring customers from parking areas to the customer entrance should be provided.
      (4)   Internal pedestrian walkways shall maintain a minimum unobstructed width of three feet, unless specified otherwise.
      (5)   The portion of an internal pedestrian walkway immediately adjacent to the customer entrance of a building, individual suite or tenant space shall be protected from weather by architectural features such as awnings or arcades.
      (6)   Some internal pedestrian walkways shall be distinguished from driving surfaces using durable, low maintenance materials such as pavers, bricks, colored or scored concrete to enhance pedestrian safety and comfort, as well as the attractiveness of the walkways. Pavement strength must be at least equal to the adjacent pavement.
      (7)   Pathways intended for joint pedestrian and bicycle use should have a minimum pathway width of ten feet.
      (8)   Notwithstanding the above, churches, schools and government facilities shall provide internal pedestrian walkways appropriate to their traffic circulation patterns (i.e. pick up and drop off areas); where they connect to neighborhoods and as needed for multiple ingress and egress points to their type of land use.
      (9)   In the design and construction of all walkways and paths, the Americans with Disabilities Act (ADA) Guidelines shall be followed.
   (M)   Central features and community spaces: Each retail, service, office and industrial establishment in the OP, C-1, C-2, and C-3 zoning districts and the I-1 and I-2 zoning districts within the Freeway Overlay District shall contribute to the establishment or enhancement of community and public spaces.
      (1)   Retail or service developments with less than 10,000 square feet of building area and office or industrial developments shall provide at least one of the following central features and community spaces: patio/seating area, xeriscaping, pedestrian plaza with benches, window shopping walkway (covered or partially covered), outdoor playground area, water feature, clock or bell tower, or other such deliberately shaped area, a focal feature or amenity that, in the judgment of the Director of Planning, adequately establishes or enhances a community and public space.
      (2)   Retail or service developments of 10,000 square feet or greater building area shall provide at least two of the central features and community spaces mentioned above.
      (3)   Each area, focal feature, or amenity shall be sized appropriately to fit the design, activity, occupants and population of the development.
      (4)   These areas, focal features, or amenities shall have direct access to the internal pedestrian walkways and shall not be constructed of materials that are inferior to the principal materials of the building and landscape.
      (5)   When approving central features and community spaces, the Director of Planning may allow sharing of features or spaces based on a comprehensively planned retail or service development when the size and location of the features and spaces are deemed appropriate in his judgment.
   (N)   Application procedure. A landscape plan shall accompany an application for a building, paving, or construction permit and shall be submitted to the appropriate department for review in accordance with the specified submittal requirements. The landscape plan shall provide the following information:
      (1)   Appropriate title and page numbers;
      (2)   Title block to include the street address, lot and block numbers, subdivision name, city, state and date of preparation;
      (3)   Name and address of property owner;
      (4)   Name and address of person preparing plan with proof of qualifications;
      (5)   Written and graphic scale at a minimum of 1" = 40' or greater;
      (6)   North arrow;
      (7)   Boundaries of the area covered by the landscape plan with dimensions;
      (8)   Location and size of existing or proposed public or private streets or alleys;
      (9)   Location of existing or proposed structures, pavement, walkways, and driveways;
      (10)   Location of existing or proposed easements;
      (11)   Location of existing or proposed drainage ways, and significant natural features;
      (12)   The width of all required or proposed landscape buffer yards shown and labeled;
      (13)   The width of all required or proposed landscape setbacks shown and labeled;
      (14)   The size and type of all screening, included construction details, shown and labeled;
      (15)   Location, size and species of all trees to be preserved with protection measures identified on plans;
      (16)   Location, quantity, size and name of all proposed landscape features, including plants, paving, benches, screens, fountains, statues, earthen berms, ponds (to include depth of water), topography of the site and any other proposed feature;
      (17)   Maintenance note, see division (F)(34).
      (18)   Enhanced pavement proposed labeled.
      (19)   Berms delineated with one foot contour intervals.
      (20)   Irrigation sleeves on the landscape, irrigation, paving and site plans.
      (21)   Parking calculations to determine the number of trees required in the parking areas.
      (22)   Landscape calculations to explain how the numbers and types of plants were determined.
      (23)   Any other pertinent information deemed necessary by the Landscape Administrator or City Engineer.
      (24)   Plant list shown in a similar format as shown in division (DD) of this section.
   (O)   Buffer yard and screening. All developments, except those in the C-4, Downtown Business District, are required to provide buffer yards and screening in accordance with the provisions of this section.
      (1)   Buffer yard. A buffer yard is a strip of land, together with a specified amount of planting and any structures that may be required between land uses to eliminate or minimize conflict between the uses.
      (2)   Buffer yards shall be located within and along the outer perimeter of a lot or boundary line and entirely on private property. No part of any screening device shall be located in public right-of-way.
      (3)   Only those structures used for buffering and /or screening purposes shall be located within a buffer yard. The buffer yard shall not include any paved area, except for pedestrian sidewalks or paths or vehicular drives that may intersect the buffer yard and which shall be the minimum width necessary to provide pedestrian or vehicular access.
      (4)   The Landscape Administrator in cooperation with the City Engineer may allow an alternative type, location or configuration of buffer yard or screening wall or device to avoid potential interference with public utilities or flood water conveyance. The alternative recommendation shall meet the intent of this section to screen or buffer uses. Wood fencing or chain link fencing are not permitted alternatives. Preservation of existing natural areas and vegetation may be considered as alternatives to separate incompatible land uses.
      (5)   Trees, shrubs, and ground cover shall be planted in the buffer yard by the developer or owner of the developing property according to the type of buffer yard required.
      (6)   In order to determine the type of buffer yard and screening required, the developer must know the zoning and proposed use of his property and the zoning and existing use of any adjacent properties. The developer must first find either the zoning or proposed use of the property being developed in the first column of the table below, then look for the zoning or existing use of any adjacent property in the top row of the table. The types of required buffer yards and required screening are listed horizontally across from the proposed use or zoning of the property being developed and under the corresponding column heading depicting the zoning or existing use of the adjacent properties.
      (7)   Types of required buffer yards and screening.
 
SF, 2F, PR w/Res
MF, Townhou se
OP, C-1, C-2
C-3, I-1, I- 2
Existing Church, School, or City Use
Vacant PR
MH
SF, 2F, PR w/Res
NA
NA
NA
NA
NA
NA
NA
NA
NA
SW8**
SW8**
WF6
NA
NA
MF, Townhou se
BY50
BY10
BY10
BY10
BY10
BY50
BY10
SW6
NA
SW6**
SW6**
SW6
NA
SD6
OP, C-1, C-2
BY20
BY10
BY10*
BY10*
BY10
BY20
BY10
SW8
SW6
NA
NA
SW6
NA
SW6
C-3, I-1,
I-2
BY30
BY10
BY10*
BY10*
BY10
BY30
BY10
SW8
SW6
NA
NA
SW6
NA
SW6
Church, School or City Use
BY10
BY10
BY10
BY10
BY10
BY10
BY10
SD6
SD6
NA
NA
NA
NA
NA
MH
BY20
BY10
BY10
BY10
BY10
BY20
BY10
SD6
SD6
SW6**
SW6**
SD6
SD6
SD6
*   Tree plantings are reduced by 50%. When plantings are reduced, trees must be staggered between properties.
**   Not applicable if adjacent property is vacant.
PR w/Res means a lot or tract that is zoned PR and occupied by a residential use.
 
      (8)   BY10. Minimum ten foot wide buffer yard with one tree planted for every 25 linear feet or portion of said landscape buffer strip.
      (9)   BY20. Minimum 20 foot wide buffer yard with one tree planted for every 25 linear feet or portion of said landscape buffer strip.
      (10)   BY30. Minimum 30 foot wide buffer yard with one tree planted for every 25 linear feet or portion of said landscape buffer strip.
      (11)   BY50. Minimum 50 foot wide buffer yard with a double row of plantings. One row shall contain deciduous canopy trees placed at one tree per 50 linear feet. A second row shall contain evergreen canopy trees placed at one tree per 50 linear feet.
      (12)   Buffer yards are not required within the same multi-family residential, town home or manufactured home subdivision on separately platted lots.
      (13)   Where the adjacent property is in a Planned Development District, the required buffer yard and screening shall be determined by the uses permitted in the Planned Development District that abut the property being developed.
      (14)   When a lot line is adjacent to two zoning districts, the required buffer yard shall comply with the more restrictive requirement.
      (15)   Existing manufactured home rental communities or subdivisions are exempt from the buffer yard requirements.
      (16)   For developments in the I-1 and I-2 zoning districts, which are not abutting any properties in a residential zoning classification or a PR zoning classification that is occupied by a residential use, the required buffer yard may be waived in lieu of a designated landscaped area of at least 10% of the total lot area. This landscaped area shall contain additional plant materials to enhance customer walkways, building fronts, outdoor seating areas or other similar areas preferably in front of or to the side of buildings or in parking areas.
      (17)   When a shared drive or building is situated along or over a common property line, the Landscape Administrator may allow a substitute of either:
         (a)   A drive aisle median strip adjacent to the shared drive as described later in this section; or
         (b)   Require a landscape area with the equivalent square footage and trees as in the required buffer yard to be placed anywhere else on the site in addition to all the other required landscaping.
      (18)   A seven and one-half foot screening wall construction and maintenance easement shall be provided by the developer of any residential development submitted after the approval date of this chapter that abuts non-residential zoning in order to facilitate the construction and perpetual maintenance of the masonry screening wall that is required on the non-residential property under the provisions of this chapter.
      (19)   SW6. Minimum six and maximum eight foot tall screening wall.
      (20)   SW8. Eight foot tall screening wall.
      (21)   The SW6 and SW8 screening walls required in this section shall be constructed of the following materials:
         (a)   Brick, stone or split-face concrete masonry unit;
         (b)   Pre-cast concrete wall or pour in place concrete wall with a similar appearance as brick, stone or split-face concrete masonry unit;
      (22)   SD6. Minimum six foot and maximum of eight foot screening device.
      (23)   The SD6 screening device required in this section shall be constructed of the following materials.
         (a)   Wood. Cedar or redwood only;
         (b)   Masonry. Brick, stone, decorative or split-face block only;
         (c)   Pre-cast concrete wall or pour-in-place concrete walls with a similar appearance as wood or masonry;
         (d)   Wrought iron or tubular steel provided that screening shrubs (able to screen up to six feet in height within 18 months of planting) are placed adjacent to the fence on private property;
         (e)   Combination of two or more of the above construction materials; or
         (f)   Other alternate construction materials provided that the Planning and Zoning Commission explicitly authorize them.
      (24)   Notwithstanding the above, the school district may use chain link fencing with slats that provide 90% percent opaqueness.
      (25)   Construction design of the screening wall and device shall be in accordance with the following:
         (a)   Screening device shall be constructed with cedar or redwood panels and supported by horizontal rails of the same materials. Galvanized steel posts with concrete footings shall be placed at intervals of no longer than eight feet on center. The galvanized steel posts shall be a minimum 15 to 18 gauge and minimum 2-" in diameter. There shall be at least three horizontal rails for a six foot high fence and four horizontal rails for an eight foot high fence. A hole with a minimum diameter of ten  inches and a minimum depth of 24 inches shall be required for the concrete footings.
         (b)   The side of a screening device with horizontal rails and posts shall not face the adjacent property or street along the perimeter of the development.
         (c)   When a screening wall is built in phases for a development, the color, height, style and exterior finish for all phases shall be as closely similar as possible, and shall, in no case, be incompatible. The screening wall shall be equally finished on both sides.
         (d)   All screening walls required by this section shall be constructed of materials with earth tone colors or traditional masonry colors. Screening walls with nontraditional masonry colors shall be prohibited.
         (e)   Smooth-face concrete masonry units (i.e. haydite blocks) shall not be permitted as construction material for screening.
         (f)   The screening wall or device shall be designed and constructed to prevent any drainage or erosion problems.
         (g)   A metal "L" or similar support bracket shall be situated under the bottom row of brick or stone of the screening wall.
         (h)   The height of a screening wall or device shall be measured from the ground level at the bottom of the wall or device. However, a screening wall or device erected on top of a retaining wall or structure shall not exceed six feet in height as measured from the bottom of the screening wall or device to the top thereof.
         (i)   Designs for the SW6 and SW8 shall be prepared and sealed by a professional architect or engineer and designed in accordance with the City of Mansfield Building Code.
      (26)   The owner of the property with the required screening shall be responsible for the maintenance of the screening in a structurally sound condition. This provision does not relieve abutting property owner of liability for damage caused by such owner or his employees, agents, or contractors.
   (P)   Street landscape setback.
      (1)   When any townhouse is constructed on a lot in a MF-1 or MF-2 District, a 25 foot wide landscape setback shall be provided along the entire boundary of the lot that abuts a public street. The setback shall not include any paved area, except for pedestrian walkways or paths or vehicular drives that may intersect the setback and which shall be the minimum width necessary to provide pedestrian or vehicular access.
      (2)   When any apartment or multiple family dwelling other than townhouse is constructed on a lot in a MF-1 or MF-2 District, a 50 foot wide landscape setback shall be provided along the entire boundary of the lot that abuts a public street. The setback shall not include any paved area, except for pedestrian walkways or paths or vehicular drives that may intersect the landscape setback and which shall be the minimum width necessary to provide pedestrian or vehicular access. Other building setbacks may also apply; refer to Table § 155.055(B).
      (3)   When any land use is established on a lot in the OP, C-1, C-2, C-3, I-1 and I-2 Zoning Districts, a 20 foot wide landscape setback shall be provided along the entire boundary of the lot that abuts a public street, exclusive of driveways and access ways at points of ingress and egress to and from the lot.
      (4)   When a church, school or other facility owned or operated by a government entity is established on a lot in a PR or residential zoning district, a 20 foot wide landscape setback shall be provided along the entire boundary of the lot that abuts a public street, exclusive of driveways and access ways at points of ingress and egress to and from the lot.
      (5)   Within the required landscape setback, one canopy tree shall be provided for each 40 feet or portion thereof, except that for any apartment or multiple family dwelling other than townhouse, one canopy tree and one ornamental tree shall be provided for each 40 feet or portion thereof.
      (6)   Trees within the landscape setback may be clustered, however no spacing shall be greater than 50 feet.
   (Q)   Parking lot perimeter landscaping.
      (1)   In the MF-1, MF-2, OP, C-1, C-2, C-3, I-1 and I-2 Zoning Districts and all non-residential development such as churches, schools and public facilities in any zoning district, all parking lot, vehicular use and maneuvering areas that are not screened by on-site buildings shall be screened from view of public streets in accordance with the following requirements:
         (a)   The screening shall be a minimum height of three feet, at maturity, (in case of plants) above the grade of the parking lot, vehicle use and/or maneuvering areas.
         (b)   The screening shall consist of one or a combination of the following:
            1.   Screening shrubs; and/or
            2.   Sodded berms.
         (c)   The screening may occur within the street landscape setback.
         (d)   Wheel stops shall be provided for parking spaces adjacent to the screening to prohibit any vehicle from overhanging the planting area.
   (R)   Parking lot internal landscaping. Any parking lot that contains ten or more parking spaces shall provide internal landscaping except as prescribed hereinbelow.
      (1)   A ratio of one canopy tree for every ten parking spaces shall be provided throughout any surface parking lot.
      (2)   Planting areas for trees within the parking rows of a surface parking lot shall be achieved by one or both of the following:
         (a)   A continuous landscaped median strip, at least six feet wide (back-of-curb to back-of-curb) between rows of parking spaces. Trees shall be placed at intervals no greater than 40 feet apart or fraction thereof.
         (b)   Landscape islands, at least the minimum size of a regular parking space of nine by 18 feet or 162 square feet. No more than 15 contiguous spaces shall be located together without a tree-island.
      (3)   Parking lots that are designed with planted or raised landscape islands shall design the islands so as not to interfere with the opening of car doors in adjacent spaces.
      (4)   Every required landscape island must include one canopy tree.
      (5)   Notwithstanding the above, parking lots for a church, school, government facility and uses in the C-4, Downtown Business District shall provide internal landscaping only when such parking lots contain 20 or more parking spaces and only at a ratio of one canopy tree for every 20 parking spaces.
   (S)   Parking end caps. One landscape island shall be located at the terminus of each row of parking and shall contain one tree. Rows with head-to-head parking arrangements shall have two islands and two trees. Refer to the graphic below.
   (T)   Drive aisles into non-residential developments. A landscape median strip with a minimum width of six feet (back-of-curb to back-of-curb) shall be incorporated in the parking lot design to separate the parking area and the drive aisle with direct connection to the street. One tree shall be planted for every 40 linear feet or fraction thereof.
 
   (U)    Foundation area and ground equipment landscapin g.
      (1)    In the OP, C-1, C-2, and C-3 Zoning Districts; and the I-1 and I-2 Zoning Districts within the Freeway Overlay District; and all non-residential development such as churches, schools and public facilities in any zoning district, a minimum four foot wide landscape area is required adjacent to or within ten feet of all building facades with customer entrances and building facades facing a public street, (exclusive of driveways, access walks, and service and delivery areas).
      (2)   Planting should emphasize softening large expanses of building walls, accenting building entrances and architectural features, and screening mechanical equipment and shall include a variety of grass, ground cover, plants, flower beds, shrubs, and trees.
      (3)   Where extended roofs or canopies are used to provide a covered walkway adjacent to a building, foundation plantings are not required under the extended roofs or canopies. However, landscaping is recommended to separate vehicular areas from building.
      (4)   Plantings shall be situated around, along or adjacent to the low wing walls or screening walls required in § 155.093(A)(2) and (B).
   (V)   Drive-through windows. Where drive-through lanes are situated parallel to a public street, a landscape median with a minimum width of three feet (from back of curb to back of curb) shall be situated adjacent to and parallel with the drive-through stacking lanes that are visible from the adjacent public streets. Each median shall be planted with a minimum of five gallon shrubs placed at three feet on center to create a minimum three foot high screening hedge. The screening is intended to visually screen cars stacked in drive-through stacking lanes waiting for service as well as menu boards and reduce noise from outdoor speakers associated with drive-through windows. Where multiple drive-through stacking lanes are provided, the screening shall be placed adjacent to the outer most lane.
   (W)   Detention/retention ponds.
      (1)   Detention and retention ponds, or other holding areas that are part of a storm/surface water system, shall be enhanced as an amenity of the development.
      (2)   When not designed as an integral part of a landscape plan or featured as an amenity (i.e., water features in a wet bottom basin or recreation/open space in a dry bottom basin) all detention ponds, retention ponds, or other similar holding areas shall be screened from view from any existing or future public street and from adjoining property. Screening may be accomplished using landscape materials that compliment the overall design of the site or screening walls or devices that match the predominant building materials used on the adjacent buildings or landscaping. When screening walls or devices are used, provisions should be made for safety, access and maintenance of any pond areas.
      (3)   The development of any storm/surface water system shall be in accordance with all applicable design criteria established by the Public Works Department.
   (X)   Street intersection landscape areas. For all development in the OP, C-1, C-2, and C-3 Zoning Districts; and the I-1 and I-2 Zoning Districts in the Freeway Overlay District; and all MF zoning Districts, where parcels are located at the intersection of two streets where at least one street has a right-of-way width of 60 feet or larger as shown on the city's most recent thoroughfare plan, a 30 foot landscape setback shall be provided parallel to the minimum visibility triangle required by the Mansfield Roadway and Access Management Criteria. No landscaping shall interfere with any visibility triangles.
   (Y)   Other landscape areas. For all development in the OP, C-1, C-2, and C-3 Zoning Districts and the I-1 and I-2 Zoning Districts in the Freeway Overlay District, a minimum of 10% of each lot shall be devoted to living landscaping which shall include grass, ground cover, plants, flower beds, shrubs and trees. Required street landscape setbacks, intersection landscaping, foundation landscaping and landscape buffer yards may be included in this calculation. Parking lot internal and perimeter landscaping shall not be included in the calculations unless an area exceeds the minimum requirement of this section, then the additional area may be included.
   (Z)   Residential tree requirements.
      (1)   Every lot in a PR and SF Zoning District shall provide a minimum number of canopy trees per lot as follows:
         (a)   For lots containing 9,600 square feet or less, provide three canopy trees. At least two trees shall be placed in the front yard.
         (b)   For lots containing 9,601 square feet or greater, provide four canopy trees. At least two trees shall be placed in the front yard.
      (2)   Every dwelling unit in the 2F District shall provide a minimum of two canopy trees per unit. At least one tree shall be placed in the front yard of each dwelling unit.
      (3)   All required trees shall be planted prior to approval of final inspection or occupancy of the applicable dwelling unit.
   (AA)   Residential foundation plantings.
      (1)   In the PR, SF and 2F Zoning Districts and any town house development, shrubs shall be planted along a minimum of 50% of the length of the foundation of a dwelling unit for any part of the foundation that faces a street. This does not include any part of a foundation that is not visible from the street after fencing.
      (2)   In the MF-1 and MF-2 Zoning Districts, a single row of shrubs is required along the entire facade of each multi-family residential or accessory building, excluding access driveways or pedestrian ways.
      (3)   In MF-1 and MF-2 Zoning Districts, evergreen shrubs shall be planted around HVAC units, meters, transformers, and other utility units; trash containers, refuse or recycling storage facilities; pool equipment, or service areas, as well as around and adjacent to the screening walls required by  § 155.093. Openings or access to the equipment shall not be obstructed. The height of the shrubs required herein shall not be less than the height of the meters being screened.
      (4)   Unless specified otherwise, the above screening shrubs shall be a minimum of two feet in height at the time of planting and not of a dwarf variety.
   (BB)   Residential lawn requirements.
      (1)   In the PR, SF and 2F Zoning Districts the front, side and rear yards adjacent to the house, that is outside of any rear yard fencing shall be planted with grass or ground cover, exclusive of driveways, sidewalks, flower beds, gardens, etc. prior to final inspection. Regardless of the zoning district, for lots over 20,000 square feet, the area around the house extending 25 feet from the pad, shall be planted with grass or ground cover, exclusive of driveways, sidewalks, flower beds, gardens, etc. prior to final inspection.
      (2)   In the MF District, all lawns shall be sodded or planted in ground cover, exclusive of driveways, sidewalks, flowerbeds, gardens, etc. prior to final inspection.
      (3)   All residential lawns and landscaping shall be irrigated with an underground irrigation system as specified in division (K) of this section. On large area lots, the area of irrigation may be limited to 12,000 square feet.
   (CC)   Preservation credits.
      (1)   The following preservation credits shall be considered when developing around existing quality trees.
      (2)   Quality trees preserved on a site meeting the herein specifications may be credited toward meeting the tree requirement of any landscaping provision of this section for that area within which they are located, according to the following table:
 
Diameter (DBH) of Existing Tree
Credit against Tree Requirement
6" to 8"
2 trees
9" to 15"
3 trees
16" to 30"
4 trees
31" to 46"
5 trees
47" or more
8 trees
 
      (3)   For purposes of this section, the Diameter at Breast Height (DBH) dimension shall be measured at four and one-half feet above the ground, and shall be rounded to the nearest whole number.
      (4)   Existing trees, not on the approved tree list, may receive credit if authorized by the Landscape Administrator.
      (5)   Credit will be revoked where trees intended for preservation credits are damaged due to, among other things, construction, broken branches, and soil compaction or soil cut/fill.
      (6)   In order to receive credit for existing trees in a parking area, the island or area around the trunk of the tree must be enlarged and sized properly to ensure the best scenario for survival.
      (7)   Prior to any construction or land development, the developer shall clearly mark all trees to be preserved. Protective barriers shall be installed and maintained throughout the development process. The developer shall not allow the movement of heavy equipment or the storage of equipment, materials, debris, or fill to be placed within the drip line of any trees. This is not intended to prohibit the normal construction required within parking lots.
      (8)   During construction, the developer shall not allow cleaning of equipment or material under the canopy of any existing tree or group of trees. There shall be no disposal of any waste material such as, but not limited to, paint, oil, solvents, asphalt, concrete, mortar, etc., under the canopy of any existing tree or group of trees.
      (9)   No attachment or wires of any kind, other than those of a protective nature, shall be attached to any tree.
      (10)   If any tree that was preserved and used as a credit toward landscaping requirements is later removed for any reason, it shall be replaced by the number of trees for which it was originally credited. Replacement trees shall have a minimum trunk caliper of three inches.
   (DD)   Prohibited plant list. The plants listed below shall not be used to fulfill the planting requirements of this chapter.
 
Trees
 
Arizona Ash
Fraxinus velutina "Arizonia"
Bois D'arc
Maclura pomifera
Cottonwood
Populus deltoides
Siberian Elm
Ulmus pumila
Silver Maple
Acer saccharinum
Mimosa
Albizzia julibrissen
Mulberry
Morus alba
Lombardy Poplar
Populus nigra italica
Chinese Tallow
Sapium sebiferum
Arborvitae
Thuja accidentalis
Willow
all species
 
 
Shrubs
 
Euonymus
Euonymus japonicus
Ligustrum
Ligustrum japonicum
Pittosporum
Pittospurum tobbira
Loquat
Eriobotrya japonica
Oleander
Nerium oleander
 
   (EE)   Recommended plant list. All plants used to satisfy this chapter shall be of a species common or adaptable to this area of Texas. The following is a list of recommended plants. Plant material not on this list must be approved by the Landscape Administrator before installation.
 
Canopy-type Trees
 
American Elm
Ulmus americana
Bald Cypress
Taxodium distichum*
Black Hickory
Carya texana
Black Oak
Quercus velutina
Black Walnut
Juglans nigra
Blackjack Oak
Quercus marilandica
Bur Oak   
Quercus macrocarpa
Cedar Elm
Ulmus crassifolia*
Chinese Pistache   
Pistacia chinensis
Chinquapin Oak
Quercus muehlenbergi*
Dawn Redwood
Metasequoia glyptostroboides
Durand Oak
Quercus sinuata var. sinuata*
Eastern Red Cedar
Juniperus virginiana
Big Tooth Maple
Acer grandidentatum*
Gingko
Ginko biloba*
Green Ash
Fraxinus pennsylvanica
Gum Bumelia
Bumelia lanuginosa
Lacebark Elm
Ulmus parvifolia*
Lacey Oak
Quercus glaucoides
Live Oak
Quercus fusiformis*
Pecan
Carya illinoensis
Post Oak
Quercus stellata*
River Birch
Betula nigra
Rusty Blackhaw
Viburnum rufidulum
Sawtooth Oak
Quercus accutisima*
Shumard Red Oak
Quercus shumardi*
Southern Magnolia
Magnolia grandiflora
Sweet Gum
Liquidambar styraciflua*
Green Ash
Fraxinus pennsylvanica
Texas Ash
Fraxinus texensi
Texas Oak
Quercus texana
Texas Walnut
Juglans microcarpa
*Recommended for Street Tree plantings.
Medium/Ornamental Trees
 
Afghan Pine
Pinus eldarica
Austrian Pine
Pinus nigra
Bigelow Oak
Quercus sinuata
Black Cherry
Prunus serotina
Carolina Buckthorn
Thamnus caroliniana
Cherry Laurel
Prunus caroliniana
Crape Myrtle
Lagerstroemia indica
Deciduous Holly
Ilex decidua
Desert Willow
Chilopsis linearis
Eve's Necklace
Sophora affinis
Flowering Crabapple
Malus hybrida
Goldenrain Tree
Koelreuteria paniculata
Hercules Club
Zanthoxylum dava-herculis
Japanese Black Pine
Pinus thunbergii
Japanese Maple
Acer palmatum
Mexican Buckeye
Ungnadia speciosa
Mexican Plum
Prunus mexicana
Native Hawthorns
Crataegus spp. (Green, Cockspur, Downy, Reverchon and Littlehip)
Persimmon
Diospyros virginiana
Ponderosa Pine
Pinus ponderosa
Possumhaw Holly
Ilex decidua
Prairie Flame-leaf Sumac
Rhus lanceobta
Redbuds
Cercis Spp.
Rusty Blackhaw Viburnum
Viburnum rufidulum
Savannah Holly
Ilex opaca 'Savannah'
Shantung Maple
Acer truncatum
Slash Pine
Pinus elliottii
Southern Wax Myrtle
Myrica cerifera
Texas Buckeye
Aesculus arguta
Vitex
Vitex agnus-castus
Yaupon Holly
Ilex vomitoria
Shrubs
 
Dwarf Burford Holly
Ilex burfordii 'nana'
Dwarf Chinese Holly
Ilex cornuta 'Rotunda'
Dwarf Crape Myrtle
Lagerstroemia indica
Dwarf Wax Myrtle
Myrica pusilla
Dwarf Yaupon
Ilex vomitoria 'Nana'
Eleagnus
Eleagnus ebbengii
Flowering Quince
Chanomeles 'Texas Scarlet'
Forsythia
Forsythia intermedia
Foster Holly
Ilex x attenuata 'Foster'
Glossy Abelia
Abelia grandiflora
Japanese Barberry
Berberis thunbergi
Nandina
Nandina domestica
Nellie R. Stevens Holly
Ilex x 'Nellie R. Stevens'
Pampas Grass
Cordateria selloana
Photinia
Photinia fraseri
Red Barberry
Berberis thunbergii
Red Yucca
Hesperaloe parvifolia
Sea Green Juniper
Juniperus chinensis 'Sea Green'
Spiraea
Spiraea spp.
Spiraea
Spiraea prunifolia
Tam Juniper
Juniperus sabina 'Tamariscifolia'
Tam Juniper
Juniperus sabina 'Tam'
Texas Sage
Leucophyllum frutescens
Texas Sage
Leucophyllum frutescens 'nana'
Variegated Chinese Privet
Ligustrum sinense 'Variegata'
 
   (FF)   Landscape plan summary charts. These charts shall be completed with information and provided on every landscape plan submittal. They represent the minimum amount of information required. The charts may be amended from time to time, as needed, without revising the ordinance.