17-7-17.6 Required landscaping | Midvale Municipal Code

17-7-17.6 Required landscaping.

The applicant shall professionally landscape the lot, according to an approved landscape plan, as a condition precedent to receiving a certificate of occupancy for all residential, mixed-use and commercial uses. The community development director shall evaluate landscape plans for all permitted uses. The planning commission shall evaluate landscape plans for conditional uses. Landscape plan approval is a condition precedent to issuance of a building permit for the parcel. All landscaping shall be in place prior to issuance of a certificate of occupancy, unless seasonal conditions make installation unfeasible, in which case the applicant shall provide cash security or its approved alternative for all landscaping yet to be completed, which landscaping shall be installed by the following May 31st. The following landscaping standards apply to all new mixed-use, multi family and commercial development in the zone and to the expansion by more than twenty-five percent of an existing building mass or site size:

A. Minimum Landscaped Area. Landscape planters shall be integrated into the overall site design.

B. Building Foundation Landscaping. If the ground adjacent to the front building foundation is landscaped, the landscaped area shall not project more than three feet from the foundation wall.

C. Residential Buffer. New development shall provide a minimum fifteen-foot landscaped buffer consisting of large trees, shrubs, and a minimum seven-foot screening wall (up to eight feet if warranted and approved by the planning commission). The screening wall shall be constructed of wood, metal, brick, masonry or other permanent materials along all property boundaries adjacent to single family residential zones. Development that abuts a roadway bordering a single family residential zone is exempt from this requirement.

D. Plant Materials. Areas requiring landscaping shall be planted with substantial, thematic, live plant material including plants, shrubs, trees, sod, etc., for the purpose of buffering, screening, and improving the visual quality of the site.

1. Types of Vegetation. At least twenty-five percent of the landscaping must be evergreen. Up to twenty-five percent of the landscape area can include specialty paving, street furniture, and outdoor seating areas. Trees that are planted in the park strip shall meet the specifications described in the standard construction specifications of Midvale City.

2. Size of Trees. The following standards apply to the use of plant and tree material:

a. Deciduous Trees. All deciduous trees shall have a minimum caliper size of two inches.

b. Ornamental Trees. All ornamental trees shall have a minimum caliper size of one and one-half inches.

c. Evergreen Trees. All evergreen trees shall have a minimum height of six feet.

3. Professionally Designed and Installed Prior to Certificate of Occupancy. Landscaping shall be professionally designed and shall be installed with an automatic sprinkling system designed to cover all planted areas, with no runoff. The applicant must install required landscaping prior to issuance of a certificate of occupancy, unless seasonal conditions make installation unfeasible, in which case the applicant shall provide cash security or its approved alternative for all landscaping, which landscaping shall be installed by the following May 31st.

E. Irrigation/Planting Plan. The applicant must submit a landscape plan documentation package. The landscape documentation package shall be submitted to and approved by the city prior to the issue of any permit. A copy of the approved landscape documentation package shall be provided to the property owner or site manager. The landscape plan documentation package shall consist of the following items:

a. Project Data Sheet. The project data sheet shall contain the following:

i. Project name and address;

ii. Applicant’s or applicant’s agent’s name, address, phone and fax number;

iii. Landscape designer’s name, address, phone and fax number; and

iv. Landscape contractor’s name, address, phone and fax number, if known.

b. Planting Plan. A detailed planting plan shall be drawn at a scale that clearly identifies the following:

i. Location of all plant materials, a legend with botanical and common names, and size of plant materials;

ii. Property lines and street names;

iii. Existing and proposed buildings, walls, fences, utilities, paved areas and other site improvements;

iv. Existing trees and plant materials to be removed or retained;

v. Designation of landscape zones; and

vi. Details and specification for tree staking (trees less than a two-inch caliper must be double-staked until the trees mature to two-inch caliper), soil preparation, and other planting work.

c. Irrigation Plan. A detailed irrigation plan shall be drawn at the same scale as the planting plan and shall contain the following information:

i. Layout of the irrigation system and a legend summarizing the type and size of all components of the system;

ii. Static water pressure in pounds per square inch (psi) at the point of connection to the public water supply;

iii. Flow rate in gallons per minute and design operating pressure in psi for each valve and precipitation rate in inches per hour for each valve with sprinklers; and

iv. Installation details for irrigation components.

d. Grading Plan. A grading plan shall be drawn at the same scale as the planting plan and shall contain the following information:

i. Property lines and street names, existing and proposed buildings, walls, fences, utilities, paved areas and other site improvements;

ii. Existing and finished contour lines and spot elevations as necessary for the proposed site improvements;

iii. Grade shall slope away from the structure as required by the International Building Code.

a. Plant Selection. Plants selected for landscape areas shall consist of plants that are well-suited to the microclimate and soil conditions at the project site. Plants with similar water needs shall be grouped together as much as possible. For projects located at the interface between urban areas and natural open space (non-irrigated), extra-drought-tolerant plants shall be selected that will blend with the native vegetation and are fire-resistant or fire-retardant. Plants with low fuel volume or high moisture content shall be emphasized. Plants that tend to accumulate excessive amounts of dead wood or debris shall be avoided. Areas with slopes greater than thirty-three percent shall be landscaped with deep-rooting, water-conserving plants for erosion control and soil stabilization. Parking strips and other landscaped areas less than four feet wide shall be landscaped with water-conserving plants.

b. Mulch. After completion of all planting, all irrigated non-turf areas shall be covered with a minimum four-inch layer of mulch to retain water, inhibit weed growth, and moderate soil temperature. Nonporous material shall not be placed under the mulch.

c. Soil Preparation. Soil preparation will be suitable to provide healthy growing conditions for the plants and to encourage water infiltration and penetration. Soil preparation shall include scarifying the soil to a minimum depth of six inches and amending the soil with organic material as per specific recommendations of the landscape designer based on the soil conditions.

d. Turfgrass. Plan shall delineate turfgrass areas and include a calculation (percentage) of irrigated turfgrass not to exceed fifty percent of the landscaped areas. Turf areas shall be on a separate irrigation zone from other landscape zones.

e. Trees. Trees less than a two-inch caliper must be double-staked until the trees mature to a two-inch caliper.

a. Pressure Regulation. A pressure-regulating valve shall be installed and maintained by the consumer if the static service pressure exceeds eighty pounds per square inch (psi). The pressure-regulating valve shall be located between the meter and the first point of water use, or first point of division in the pipe, and shall be set at the manufacturer’s recommended pressure for the sprinklers.

b. Automatic Controller. All irrigation systems shall include an electric automatic controller with multiple program and multiple repeat cycle capabilities and a flexible calendar program. All controllers shall be equipped with an automatic rain shutoff device, and the ability to adjust run times based on a percentage of maximum Eto.

c. On slopes exceeding thirty-three percent, the irrigation system shall consist of drip emitters, bubblers or sprinklers with a maximum precipitation rate of 0.85 inches per hour and adjusted sprinkler cycle times to eliminate runoff.

d. Each valve shall irrigate a landscape with similar site, slope and soil conditions and plant materials with similar watering needs. Turf and nonturf areas shall be irrigated on separate valves. Drip emitters and sprinklers shall be placed on separate valves.

e. Drip emitters or a bubbler shall be provided for each tree unless located in a turf area. Bubblers shall not exceed one and one-half gallons per minute per device. Bubblers for trees shall be placed on a separate valve unless specifically exempted by the city due to the limited number of trees on the project site.

f. Sprinklers shall have matched precipitation rates with each control valve circuit.

g. Check valves shall be required where elevation differences will cause low-head drainage. Pressure-compensating valves and sprinklers shall be required where a significant variation in water pressure will occur within the irrigation system due to elevation differences.

h. Filters and end flush valves shall be provided as necessary for drip irrigation lines.

i. Valves with spray or stream sprinklers shall be scheduled to operate between six p.m. and ten a.m. to reduce water loss from wind and evaporation.

j. Program valves for multiple repeat cycles where necessary to reduce runoff, particularly on slopes and soils with slow infiltration rates.

k. Spacing of irrigation heads shall not exceed fifty-five percent of coverage diameter.

a. As part of the site plan approval process, a copy of the landscape plan documentation package shall be submitted to the city for review and approval.

b. Following construction and prior to issuing the approval for occupancy, an inspection shall be scheduled with the planning department to verify compliance with the approved landscape plans.

c. The city reserves the right to perform site inspections at any time before, during or after the irrigation system and landscape installation, and to require corrective measures if requirements of this section are not satisfied.

F. Vegetation Protection. The property owner must protect existing significant vegetation during any development activity. Development plans must show all significant vegetation within twenty feet of a proposed development. Prior to certificate of occupancy, the property owner must demonstrate the health and viability of all large trees through a certified arborist. Mature landscaping, which has been approved to be removed, shall be replaced with like plantings exceeding the minimum requirements of this section.

G. Removal. No landscaping may be removed without replacement of equal or better quality. This shall include the installation of healthy plant materials as well as a tree-for-tree replacement as governed by this section.

H. Upgrading Preexisting Landscaping. The applicant must bring preexisting landscaping into compliance with this code upon an increase of more than twenty-five percent of the current building mass or site size.

I. Minimum Number of Trees. A minimum of one tree for every four hundred square feet of landscaping is required for all areas that are not on street frontage or adjacent to residential areas.

J. Street Trees. In order to promote a uniform appearance within the zone, street trees will be selected from Midvale’s “Street Tree Selection Guide.”

K. Reserved.

L. Crime Prevention Through Environmental Design (CPTED). The plan must demonstrate how CPTED principles will be used in the design and layout of buildings, streets, accesses and open space areas. Design shall promote natural surveillance, access control, territorial reinforcement, sense of ownership, and maintenance. CPTED landscaping guidelines shall be used, including planting shrubs with a maximum height of three feet and trees with a proper ground clearance of six feet above walkways and sidewalks and eight feet above vehicular travel and parking lanes. To encourage public safety through natural surveillance, natural access control, and territorial reinforcement, blank walls are not permitted adjacent to streets, pedestrian areas, and open space amenities. Symbolic barriers, such as low-lying fences/walls, landscaping and signage, shall be used to discourage crime and to promote safety. Ground floor parking garages shall not be permitted immediately adjacent to streets. Developments shall have street-side building elevations, with extensive windows, and with balconies, decks or landscape terraces encouraged. (Ord. 2019-06 § 1 (Att. B (part)); Ord. 2018-03 § 1 (Att. A (part)); Ord. 2017-04 § 1 (Att. A (part)))