19.71 and the technical manual for landscape design for supplementary details on…

requirements of this chapter.

(1)

Street tree requirements. Street trees shall be incorporated along all street right-of-way and shall be provided to the following specifications:

a.

General.

Type of street trees should be consistent with existing street trees.

Trees with fruit, nuts, pepper, or other maintenance intensive characteristics are not encouraged for use as street trees.

b.

Commercial, industrial, multi-family residential, parks and public facilities.

A minimum of one tree per 30 feet of lineal frontage. In order to enhance design, trees may be placed in groupings; however, the number of trees provided shall be derived as stated above.

The minimum size for the street trees shall be 24-inch box.

Lineal root barriers shall be installed for any street tree which is planted within five feet of public right-of- way or sidewalk.

c.

Single-family residential.

Standard lots shall have a minimum of one tree per 30 lineal street frontage; however, each lot shall have a minimum of one street tree per lot (cul-de-sac lots).

Corner lots shall have three street trees, minimum or one street tree for every 30 lineal feet of street frontage.

Corner lot side yard planting areas between fences/walls and sidewalks shall be planted with five gallon shrubs at spacing no greater than five feet o.c. to achieve an 80 percent shrub cover in five years and one- gallon groundcover at not more than 24 inches o.c. One-gallon vines shall be placed at 20 feet o.c.

The minimum size for the street trees shall be 24-inch box.

Lineal root barriers shall be installed for any street trees planted within five feet or closer to hardscape or walks.

(2)

Median and parkway requirements.

a.

In accordance with the circulation element of the general plan, medians shall be installed along expressways, primary arterials, secondary and may be required for other significant roadways, including those within specific plans. The requirement for median treatments along other roadways will be dependent upon traffic control needs, and if required, shall be landscaped according to these guidelines.

b.

The design of the median shall be consistent for each street and comply with the following guidelines:

Turf treatment shall be minimized.

Water runoff into the street shall not occur.

Trees, shrubs, and groundcover shall be incorporated.

Shrub placement shall be designed to form natural groupings that will not require excessive pruning or hedging, with varying heights, to create a multi-tiered effect. Shrubs shall be spaced to provide 80 percent coverage of planting area within five years of installation.

Shrubs within medians shall not exceed 36 inches in height. Within 50 feet of the end of the median, plant materials shall not exceed 24 inches in height.

c.

Parkways with slopes shall be designed to match the parkway planting theme and plant materials. Slopes shall be a maximum of 3:1. Slopes greater than 3:1 shall use a split/tiered system with a four-foot wide, minimum, planter area between the block wall and retaining wall.

d.

Natural clustering of tree species is encouraged.

e.

Street trees shall be placed to avoid conflicting with utilities and visibility site lines. Street tree placement shall comply with landscaping detail L-20 of the technical manual for landscape design. Street trees in medians shall comply with landscaping detail L-21 of the technical manual for landscape design for distance from the ends of medians. All trees within medians shall have lineal root barriers.

f.

Street trees placed within five feet of hardscape elements or walls shall have lineal root barriers.

g.

Street trees placed in turf shall have a minimum four-foot diameter clear ring around the tree trunk with three inches of wood mulch within the ring.

h.

A three-inch thick uniform layer of wood mulch shall be placed in planting areas.

i.

Medians shall be designed to have a two-foot wide hardscape surface on one edge. Up to 30 percent of the total landscaped area may be a combination of hardscape and inert or natural groundcovers.

j.

Hardscape concepts that are integrated into the overall design and do not dominate the landscape design are acceptable, as determined by the development services director.

k.

Landscape designs should be easily maintained.

l.

Evergreen trees shall be included in the landscape design, and the inclusion of deciduous varieties is optional.

m.

Above grade irrigation equipment, such as controllers, sensors, and backflow devices shall be placed in shrub planting areas for screening purposes.

n.

Utility vaults or boxes, irrigation equipment and other above grade utility elements shall not be placed at intersections.

o.

Irrigation equipment shall comply with requirements of section 19.70.040(d). Use of sprayheads is discouraged, and shall not occur within medians with width of 14 feet or less.

p.

The landscape design shall not create any sign distance or visibility problems.

(3)

Residential subdivision requirements.

a.

Parkways alongside yards on corner lots and other public areas such as bus stops and cluster-box mailbox areas shall be irrigated and metered separately, and clearly identified by a concrete mow strip, wall or element easily distinguished from private adjacent landscaping. These areas shall be accepted for maintenance by the city.

b.

Street trees shall be provided per subsection (1) of this section.

c.

A minimum of two 15-gallon front yard trees shall be provided (in addition to street tree requirements).

d.

Shrub placement shall achieve 50 percent cover of the planting area within five years of installation. 50 percent of the shrub quantity shall be five gallon or larger. Five-gallon vines shall be placed on fences and walls at a minimum of 20 feet or closer.

e.

The front yard turf area shall not exceed 70 percent of the total planting area.

f.

For trees placed in turf, provide a four-foot wide minimum clear ring.

g.

Concrete stepping pads shall be placed to provide access from side yard gates to driveway and/or walk.

h.

Irrigation systems shall be fully automatic. The irrigation controller shall be placed in the garage. Irrigation control wires shall be routed in a two-inch diameter schedule 40 PVC conduit with a minimum of 12-inch cover.

i.

Irrigation valves shall be placed in a location away from the residential entry where they shall be screened with plant materials.

j.

All irrigation lines shall be schedule 40 PVC.

k.

The use of low volume irrigation is encouraged in shrub planting areas. Turf shall be irrigated with six-inch pop-up heads, when shrubs are irrigated with six-inch pop-up heads, when shrubs are irrigated with spray heads 12-inch pop-up heads shall be used.

l.

Automatic rain shutoff devices shall be provided.

(4)

Multi-family residential development.

a.

Street trees shall be provided as stated in subsection (1) of this section.

b.

Turf area should be confined to use areas such as play areas, and shall otherwise be minimized.

c.

Trees, shrubs, groundcovers, and annual color plant material shall be provided, and the plans shall integrate into the design of the multi-family project.

d.

Enhanced landscaping shall be provided at entries along with automatic security gates. Such enhanced landscaping shall not adversely affect sight lines for vehicles entering or leaving the project.

e.

In parking areas, one 24-inch box tree shall be provided for every six parking stalls. At each end of parking stalls, an eight-inch wide minimum island shall be provided. Two 24-inch box trees shall be installed in each parking island. Palm trees may be used in parking islands: when palm trees are used they shall have a 12- inch high minimum brown trunk. Trees in island planters shall be installed with lineal root barriers. 30 percent of the trees in project shall be 36-inch box size or larger.

f.

Between parking islands trees shall be placed in four-foot minimum square diamond planters. Parking lot trees in diamond planters shall be installed with root barriers.

g.

The use of turf grass shall conform to the MAWA and the EAWU for the project.

h.

Parking areas shall be screened by a 36-inch high shrub border. The shrub border shall be created by installing a double row of five-gallon shrubs at three feet six inches o.c.

i.

Trash enclosures, shall be screened with a six-foot high shrub hedge. To achieve this hedge, five-gallon shrubs shall be installed at no greater than four feet o.c.

j.

Shrubs shall be placed within the planting areas at one shrub per every 30 square feet, except where screen requirements may require a denser planting of shrub material. 80 percent of the required shrub quantity shall be five-gallon or larger.

k.

Where pedestrian plazas, outdoor courtyards, or dining areas, occur shade trees shall be placed to provide a 50 percent summer time shade cover.

l.

Outdoor dining areas shall be enclosed by a 30-inch high masonry wall and/or shrub hedge. Place five- gallon or larger vines on structures with one vine per 400 square feet of structure (two vines minimum).

m.

Overhead arbor shade structures may be used to provide shade cover to pedestrian areas. Overhead structures shall be planted with vines.

n.

Five-gallon sized vines shall be placed on walls and fences at 20 feet o.c.

o.

Planting areas may incorporate the use of inert groundcovers. Up to 25 percent of the planting area can be covered by an inert groundcover. Shrub planting areas shall have 80 percent cover after three years of installation.

p.

80 percent of the shrubs installed shall be five gallon or larger.

q.

Planting within the site shall incorporate plant materials that complement the streetscape.

r.

Site amenities for the project shall include some of the following: clubhouse, pool and spa, basketball court, children's play area, picnic shelters and tables, outdoor patios, lawn bowling, walking trails, dog play area, tennis courts or other court games. The city shall determine which recreation elements will be required.

s.

Front yards of duplexes or triplexes shall comply with the standards for typical front yards.

t.

Rear and side yards shall be fenced to comply with the standards for single-family housing.

(5)

Slope stabilization and planting.

a.

Slopes that are 3:1 or steeper and four feet or higher, shall plant one approved tree for every 400 square feet, with 70 percent of trees 15 gallons sized, and 30 percent being five gallon sized. Trees shall be placed in informal groupings, and be a mix of deciduous and evergreen.

b.

Shrubs are to be placed with like species grouped in informal patterns according to hydrozones. Shrubs shall be provided at the rate of one five-gallon ornamental shrubs for every 75 square feet, and one gallon perennial flower/ornamental shrub for every 60 square feet.

c.

In addition to shrub materials, an approved groundcover shall be installed using rooted cuttings or one- gallon plants.

d.

Water-wise plants materials shall be used for slope plantings.

e.

For slopes five feet in height or greater, an approved erosion control fabric shall be installed. Plant materials shall be installed after erosion control fabric has been installed.

f.

Slopes that interface with the street landscape shall incorporate the planting scheme and materials of the street landscape.

(6)

Commercial landscaping requirements.

a.

Parking areas.

Tree size: Minimum of 15-gallon, 30 percent of trees shall be 36-inch box or larger.

A minimum of one 24-inch box tree per six parking stalls.

Shade trees shall be provided in accordance with chapter 19.71.

Trees with fruit, nuts, pepper, or other maintenance intensive characteristics are not encouraged for use as street or parking area trees.

Between parking islands trees shall be placed in four-foot, minimum, square planters.

At each end of parking stalls, an eight feet wide, minimum, island planter shall be provided with two 24- inch box trees.

Island planter trees shall be installed with lineal root barriers.

Parking areas and drive-through lanes shall be screened by a 36-inch high shrub border using a double row of five-gallon shrubs at 3½ feet o.c.

A minimum of ten percent of the site shall be landscaped.

Loading areas shall be screened.

Expanses of building and walls shall be broken up with landscaping.

Trash enclosures, loading/unloading areas, and truck parking areas shall be screened/broken up with six- foot high shrub hedge. Hedges shall be five gallon shrubs spaced at four feet o.c., maximum.

Where loading/unloading areas abut residential areas, parks or a street a 25-foot planting buffer area shall be provided in addition to any setback of rights-of-way. A mixture of vertical form deciduous and evergreen trees shall be placed within the planting buffer at 25 feet o.c. maximum. 15-gallon shrubs shall be provided at six feet maximum to provide a six-foot high screen adjacent to residential areas or parks. Where the loading/unloading area is adjacent to a street, a six-foot high shrub screen shall be placed adjacent to the loading/unloading area. In addition to the shrub screen of loading and service areas, trees shall be placed at 15-foot to 20-foot o.c. 50 percent of the trees used for screening shall be 36-inch box size, and 50 percent shall be 24-inch box size.

Shrubs shall be placed within the planting areas at one shrub per each 30 square feet, except where screen requirements may require a denser planting. 80 percent of the required planting shall be five-gallon or larger.

Planting within the site shall incorporate plant materials that complement the streetscape.

Enhanced landscaping shall be provided at all points of entry to the site.

Street trees as stipulated in street tree portion of this chapter shall be provided.

(7)

Industrial landscaping requirements. Same as subsection (6) of this section.

(8)

Model home complex landscape requirements.

a.

Landscaping plans as described in section 19.70.040 shall be required.

Model homes complexes shall use signs and provide written information to demonstrate the principles of water efficient landscapes as described in this chapter.

Signs shall identify the model exemplifying water efficient landscape elements such as hydrozones, irrigation equipment, and other features that contribute to the overall water efficient theme.

Information shall be provided about designing, installing, managing, and maintaining water efficient landscapes.

b.

A minimum of 25 percent of the model homes shall be landscaped with xeriscape designs.

c.

All shade structures, arbors, gazebos, pergolas, decks or other structures used in the model complex shall be designed and constructed to meet city building codes.

d.

All trap fencing shall be located outside of the public right-of-way. Trap fencing must be secured to be stable throughout the sales period of the model homes.

e.

Temporary landscaping shall be provided within a planter area surrounding the sales parking area, as follows:

24-inch box trees shall be planted near parking spaces at a rate of one tree per every two spaces. Additional trees shall be installed so that the total quantity of trees equals or exceeds the rate of one tree per 30 linear feet. Additional trees shall be sized 24-inch box or larger. Planting schemes must incorporate the approved city street trees in the model front yards.

Planting concepts used shall employ waterwise garden design principles. This shall include plant selection, reduction of the amount of turf to comply with the typical front yard standards, and use of mulch materials, inert groundcovers and hardscape.

A shrub border shall be installed at the perimeter of the parking lot and maintained at a height of 36 inches. Minimum five-gallon sized shrubs within the screening border shall be installed at 30 inches o.c. maximum.

f.

Model home front yard designs must use concrete mow strip between any turf and plantings.

g.

A minimum of 15 percent of front yard shrubs used shall be 15-gallon material. Not more than 30 percent of the shrubs shall be one-gallon material. All remaining shrubs shall be five-gallon sized.

h.

Turf used in the landscape design shall not exceed the MAWA and EAWU for the model home complex (the project).

i.

Groundcover shall be installed in all non-turf planter beds, including up to the stems of shrubs and the trunks of trees.

(9)

Landscape for screening. When landscaping is provided for screening purposes, the following criteria shall be met:

a.

Plant material shall be sized and spaced appropriately to ensure 100 percent screening within three years of installation.

b.

The plant material shall be of variety that will retain screening qualities at all times of the year.

c.

The landscape shall be maintained in a viable and healthy growth condition.

d.

The landscape screen shall be served by a permanent automatic irrigation system.

(Code 1972, § 19.70.060)