Chapter 18.85
LANDSCAPE REQUIREMENTS

Sections:

18.85.010 Definitions.

18.85.020 Purpose.

18.85.030 Applicability.

18.85.040 Submittal requirements.

18.85.050 Land use districts.

18.85.060 Significant tree and tree stand requirements.

18.85.070 Perimeter landscape requirements.

18.85.090 Planting requirements.

18.85.100 Irrigation.

18.85.110 Maintenance of landscaping and significant trees.

18.85.120 Suggested landscape materials matrix.

18.85.130 Landscaping declaration and checklist.

18.85.010 Definitions.

“BIMC” means Bainbridge Island Municipal Code.

“Caliper” means a measurement used for deciduous trees. Caliper of a tree trunk shall be taken six inches above the ground up to and including four-inch caliper size, and 12 inches above the ground for larger tree sizes.

“Diameter/diameter – breast – height” means the diameter of a tree trunk measured at four feet above average grade.

“Drought resistant plants” means plant material once established can survive with little or no water other than that from annual rainfall.

“Native species” means tree, shrub or ground cover species which occur or live naturally in the Puget Sound region.

“Landscape perimeter averaging” means a method that allows required landscape perimeters to be reduced to a minimum dimension and cluster plants to areas within the perimeter that provides denser screening adjacent to structures and parking areas, and allows lesser screening in areas where there are no structures and parking areas. Landscape perimeter averaging is also allowed to retain significant trees and tree stands located within the perimeters. The total required landscape perimeter dimension square footage must be achieved.

“Protection zone” means the zone at grade level located directly below the canopy and within the dripline.

“Screen” means a system of vegetation located within the perimeter landscape to provide varying degrees of visual separation between land uses and site development.

“Significant tree” means:

A. Evergreen tree 10 inches in diameter or greater, measured four feet above existing grade; or

B. Deciduous tree 12 inches in diameter or greater, measured four feet above existing grade; or

C. All trees located within a required critical area buffer as defined in Chapter 16.20 BIMC.

“Tree canopy” means the total area of the tree or trees where the leaves and outermost branches extend, also known as the “dripline”.

“Tree stand” means at least five or more existing trees forming a continuous canopy, each having a six-inch diameter or greater, measured four feet above existing grade. Trees may be evergreen or deciduous varieties. (Ord. 96-09 § 2, 1996)

18.85.020 Purpose.

The purpose of this chapter is to preserve the landscape character of the community, link the Island’s natural amenities with landscape greenbelts along scenic roads, improve the aesthetic quality of the built environment, promote retention and protection of existing vegetation, reduce the impacts of development on wetlands, streams and the natural environment, enhance the value of current and future development and increase privacy for residential zones by:

A. Retaining existing vegetation, tree stands and significant trees by incorporating them into the site design.

B. Incorporating native vegetation and drought resistant plant material into new landscape developments.

C. Providing vegetated screening between different intensities of residential uses.

D. Providing visual relief of parking areas in the neighborhood service centers, the Winslow Mixed Use Town Center, and the light manufacturing, (water dependent) industrial, high school road and urban multifamily districts.

E. Providing vegetated screening between residential and nonresidential areas. (Ord. 96-09 § 2, 1996)

18.85.030 Applicability.

A. All new development, except single-family residential building permits, shall be subject to the requirements of this chapter, except as required by subsections B and C of this section.

B. Projects subject to the conditional use permit process may be required to exceed the requirements of this chapter.

C. For landscape requirements pertaining to short subdivisions, long subdivisions, large lot subdivisions, and planned unit developments as part of the flexible lot design process, refer to Chapters 17.04, 17.12, 17.16 and 18.120 BIMC. (Ord. 96-09 § 2, 1996)

18.85.040 Submittal requirements.

A. Intent. All new development, as identified in BIMC 18.85.030(A), shall submit the following information at the time of permit application.

B. General.

1. The applicant is encouraged to contact the department for a preapplication conference prior to submitting an application.

2. All required planting and significant tree and tree stand retention plans shall be clearly legible with a title that includes the project name, owner’s name, designer’s name, date and scale. All items shall be labeled, and north shall be oriented towards the top or left of the plan.

3. All plans must be prepared or approved, by a landscape architect licensed by the state of Washington, a Washington certified nursery professional or a Washington certified landscaper.

4. Planting Plan. A planting plan at a scale of no less than one inch equals 30 feet. The proposed landscape planting plan shall show the following:

a. Property lines, easements, rights-of-way, and setbacks, streets and utilities within the subject property; and

b. Existing and proposed grades of at least five-foot intervals; and

c. All new proposed construction and planting and any future construction and planting that is not included in the application; and

d. Location of all existing and proposed buildings, structures and improvements within the property; and

e. A plant list for all proposed new planting delineating quantities, scientific and common names and sizes. Names of plants are to follow current edition of the Hortus Third, A Concise Dictionary of Plants Cultivated in the U.S. and Canada; and sizes of plants are to follow the current edition of the American Standard for Nursery Stock, American Association of Nurseryman (AAN). The planting plan shall specify the following:

i. Tree protection strategies; and

ii. Vegetation clearing strategies; and

iii. Topsoil protection and reuse strategies; and

iv. Native soil amendment strategies; and

v. Planting times and physical limits of construction; and

vi. Areas that require temporary or permanent irrigation.

5. Significant Tree and Tree Stand Retention Plan. The applicant shall submit a tree retention plan, concurrent with applicable permit application, whichever is reviewed and approved first. The tree retention plan may be combined with the planting plan and shall consist of:

a. A tree survey or aerial photograph that represents current site conditions and identifies the location of all significant trees, tree stands and their associated canopies. For detailed site plans and grading applications, the tree survey may be conducted by a method that locates individual significant trees and tree stands, their size(s) and species. These trees shall be marked in the field at the time of permit or approval application and maintained through the construction period; and

b. A development site plan identifying the significant trees and tree stands, as defined in BIMC 18.85.060, that are proposed to be retained. (Ord. 96-09 § 2, 1996)

18.85.050 Land use districts.

The land use districts identified in this section are consistent with the city of Bainbridge Island’s Comprehensive Plan land use element, September 1, 1994.

Land Use Districts	Landscape Requirements
	Submittal Requirements (BIMC 18.85.040)	Significant Tree &Tree Stand Ret. (BIMC 18.85.060)	Perimeter Landscape (BIMC 18.85.070)	Planting Requirements (BIMC 18.85.090)	Irrigation (BIMC 18.85.100)	Maintenance (BIMC 18.85.110)
Neighborhood Service Centers (NSCs)	√	√	√	√	√	√
Light Manufacturing (LM) District	√	√	√	√	√	√
(Water Dependent) Industrial District	√	√	√	√	√	√
Single-Family Residential Development
Other than Building Permits (Flexible
Lot Design Process)1
Nonresidential Uses in Areas Outside
Winslow, NSCs and LM	√	√	√	√	√	√
Winslow Mixed Use Town Center 2
Central Core Overlay District	√		√	√	√	√
Ericksen Avenue Overlay District	√	√	√	√	√	√
Madison Avenue Overlay District	√	√	√	√	√	√
Gateway Overlay District	√	√	√	√	√	√
Ferry Terminal Overlay District	√		√	√	√	√
Urban Multifamily District	√	√	√	√	√	√
High School Road District	√	√	√	√	√	√
Notes:
1. For landscape requirements pertaining to short subdivisions, long subdivisions, large lot subdivisions and planned unit developments as part of the flexible lot design process, refer to Chapters 17.04, 17.12, 17.16 and 18.120 BIMC. 2. Refer to Chapter 18.41 BIMC for additional landscape requirements specific to the Winslow town center districts.

A. Neighborhood Service Centers (NSCs).

1. The city of Bainbridge Island’s Comprehensive Plan identifies neighborhood service centers as small scale centers, providing Island-wide commercial and service activity outside Winslow.

Island Center

Lynwood Center

Rolling Bay

2. Intent. To incorporate landscape standards that support pedestrian scale neighborhood uses compatible with the intensity of the surrounding residential neighborhood; to minimize the impact of lighting, noise and views of surface parking areas; and to provide a buffer between higher and lower intensity uses.

3. Landscape Requirements Applicable to NSC Districts.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

B. Light Manufacturing (LM).

1. The city of Bainbridge Island’s Comprehensive Plan states the light manufacturing district (LM) is intended to provide opportunities for expansion of existing Island businesses where low-impact, industrial activities can be concentrated and visual impacts on the surrounding neighborhood can be minimized.

2. Intent. To provide a year-round vegetated screen, and a noise and site lighting buffer of industrial development from adjacent nonindustrial properties and roadways.

3. Landscape Requirements Applicable to LM Districts.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

C. (Water Dependent) Industrial.

1. The city of Bainbridge Island’s Comprehensive Plan identifies (water dependent) industrial as a district intended primarily to provide for ship and boat repair yards.

2. Intent. To provide landscape development that screens parking lots and large structures, but allows visual access to the shoreline and small scale active industrial facilities.

3. Landscape Requirements Applicable to (Water Dependent) Industrial Districts.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

D. Areas Outside Winslow, NSCs, and LM – Nonresidential Uses.

1. The city of Bainbridge Island’s Comprehensive Plan identifies this land use district as the area located outside Winslow, the neighborhood service centers and the light manufacturing areas which are designated residential open space district.

2. Intent. Nonresidential uses are intended to be developed to retain the natural landscape qualities of the Island. This is accomplished by retaining existing vegetated buffers to screen views of structures and parking areas. Vegetated screens are provided to buffer between areas of high and low intensity uses.

3. Landscape Requirements Applicable to Nonresidential Uses.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

E. Areas Outside Winslow, NSCs, and LM – Residential Open Space (Flexible Lot Design Process).

1. The city of Bainbridge Island’s Comprehensive Plan encourages a pattern of development to preserve and protect residential open space.

2. Intent. To preserve, protect and enhance critical areas, protect the natural forested areas and preserve the greenbelts along designated scenic roadway corridors.

3. Landscape Requirements Applicable to Residential Open Space.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Planting Requirements (BIMC 18.85.090);

d. Maintenance (BIMC 18.85.110).

F. Winslow Mixed Use Town Center – Central Core and Ferry Terminal Overlay Districts.

1. The city of Bainbridge Island’s Comprehensive Plan identifies the Mixed Use Town Center as a vibrant, pedestrian-oriented core. The central core is the commercial center and the ferry terminal district, the location of ferry services with associated transportation oriented uses.

2. Intent. To provide an urban character by incorporating landscape standards; and to provide landscape development to screen uses from single-family residential properties and to soften the appearance of surface parking areas.

3. Landscape Requirements Applicable to Winslow Mixed Use Town Center – Central Core and Ferry Terminal Overlay Districts.

a. Submittal Requirements (BIMC 18.85.040);

b. Perimeter Landscape Requirements (BIMC 18.85.070);

c. Planting Requirements (BIMC 18.85.090);

d. Irrigation (BIMC 18.85.100);

e. Maintenance (BIMC 18.85.110).

G. Winslow Mixed Use Town Center – Ericksen Avenue and Madison Overlay Districts.

1. The city of Bainbridge Island’s Comprehensive Plan identifies these land use districts as providing a mix of office, retail and residential development.

2. Intent. To retain the character of landscape front yards; and to provide landscape development to screen uses from single-family residential properties; and to soften the appearance of surface parking areas.

3. Landscape Requirements Applicable to Winslow Mixed Use Town Center – Ericksen Avenue and Madison Overlay Districts.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

H. Winslow Mixed Use Town Center – Gateway Overlay District.

1. The city of Bainbridge Island’s Comprehensive Plan identifies this land use district to protect the ravine and provide low-intensity commercial, multifamily and agricultural uses.

2. Intent. To retain the greenbelt located adjacent to SR 305 consistent with the greenways plan. To provide landscape development to screen uses from single-family residential properties.

3. Landscape Requirements Applicable to Winslow Mixed Use Town Center – Gateway Overlay District.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

I. Urban Multifamily.

1. The city of Bainbridge Island’s Comprehensive Plan identifies this land use district as existing residential districts with the potential of increasing density.

2. Intent. To screen urban multifamily projects from adjacent lower density residential properties and to soften the appearance of surface parking areas.

3. Landscape Requirements Applicable to Urban Multifamily.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110).

J. High School Road.

1. The city of Bainbridge Island’s Comprehensive Plan identifies this land use district as a providing commercial uses to complement the town center.

2. Intent. To provide landscape development to screen uses from adjacent single-family residential properties and to soften the appearance of surface parking areas.

3. Landscape Requirements Applicable to High School Road.

a. Submittal Requirements (BIMC 18.85.040);

b. Significant Tree and Tree Stand Requirements (BIMC 18.85.060);

c. Perimeter Landscape Requirements (BIMC 18.85.070);

d. Planting Requirements (BIMC 18.85.090);

e. Irrigation (BIMC 18.85.100);

f. Maintenance (BIMC 18.85.110). (Ord. 96-09 § 2, 1996).

18.85.060 Significant tree and tree stand requirements.

A. Significant Tree and Tree Stand Retention.

1. Intent. To preserve the forested character of the Island in all land use districts excluding the central core and ferry terminal districts.

2. Requirement. Preserve significant trees and tree stands located in perimeter landscape areas and within a site’s interior.

Perimeter Landscape Areas

Retain all significant trees and tree stands located in the perimeter landscape areas.

Perimeter landscape widths may be averaged to save significant trees, but shall not be reduced less than the allowed minimum perimeter dimension.

Site Interior

Either:

Retain 30 percent of the significant tree canopy on the site (which may include the perimeter landscape areas, critical areas and critical area buffers); or

Retain 15 percent of the total number of significant trees, excluding significant trees within the perimeter landscape areas, critical areas, and critical area buffers.

a. Areas devoted to driveways, curb cuts, and sight distance requirements, utilities and storm drainage facilities may be exempt from this requirement.

b. Significant trees and tree stands may be exempt from this requirement if it is determined by a consulting arborist certified by the International Society of Arboriculture the vegetation is:

i. Damaged, diseased or standing dead trees; or

ii. Safety hazards due to potential root, trunk or primary limb failure, or exposure of mature trees which have grown in a closed, forested situation; or

iii. Notwithstanding subsections (A)(2)(a) and (A)(2)(b) of this section, at the discretion of the department, damaged, diseased or standing dead trees may be retained and counted toward the significant tree requirement if demonstrated that such trees will provide fish or wildlife habitat and are not classified as a danger.

c. If significant trees have been removed from a closed, forested situation, an adequate buffer of smaller trees shall be retained or planted on the fringe of such significant trees as determined by a consulting arborist certified by the International Society of Arboriculture.

d. The arborist shall be selected from a list of current arborists, certified by the International Society of Arboriculture and paid for by the applicant.

B. Protecting Significant Trees and Tree Stands During Construction.

1. Intent. To provide the best protection for significant trees and tree stands.

2. Requirements:

a. No cutting of significant trees shall be allowed on a site until the planting and significant tree and tree stand retention plans have been approved by the department.

b. An area of prohibited disturbance, generally corresponding to the dripline of the significant trees and/or tree canopy of tree stands shall be identified by the applicant and approved by the department before commencement of site plan preparation. A temporary four-foot high chain link or four-foot high plastic net fence shall delineate the area.

c. No impervious surfaces, fill, excavation, vehicle operations, compaction, removal of native soil or storage of construction materials shall be permitted within the area defined by such fencing.

d. A rock well shall be constructed if the grade level around the tree is to be raised more than one foot. The inside diameter of the well shall be equal to the diameter of the dripline of the tree or tree canopy of tree stands.

e. The grade level shall not be lowered within the larger of the two areas defined as follows:

i. The dripline of the tree, or the tree canopy of tree stands;

ii. As recommended by a consulting arborist certified by the International Society of Arboriculture.

f. Alternative protection methods may be used if determined by the department to provide equal or greater tree protection. Alternative protection methods must be recommended by a consulting arborist certified by the International Society of Arboriculture.

g. The arborist shall be selected from a list of current arborists, certified by the International Society of Arboriculture and paid for by the applicant.

C. Significant Trees and Tree Stand Replacement.

1. Intent. To discourage the unauthorized removal of significant tree(s) and tree stands; and to establish a replacement or fine if such activity occurs. When the required number of significant trees or tree stands are not retained, they shall be replaced as determined by the department with:

a. An equal number of transplanted significant trees or tree canopy; or

b. New trees measuring 1.5-inch caliper if deciduous and four feet high if evergreen, at a replacement rate of 1.5 inches diameter for every one-inch diameter (measured diameter – breast – height) of the removed significant tree or trees within a tree stand. The replacement rate determines the number of replacement trees. The trees removed shall be replaced with trees of the same type, evergreen or deciduous. The replacement trees shall also be replaced in the same location as the trees removed.

Failure to replace or transplant trees will be enforced as provided in this code; provided, that any fine shall be no less than three times the value of the trees, as determined by the current standards of the International Society of Arboriculture.

i. If unauthorized tree(s) or vegetation removal occurs within the public right-of-way, all permits in force on the subject property shall be suspended and no new permits issued until the tree(s) or vegetation has been replaced or all penalties have been satisfied.

c. Native shrubs and ground cover shall also be replaced when replacing tree stands due to unauthorized removal. Shrubs shall be one gallon size planted four feet on center spacing, ground cover shall be one gallon size planted three feet on center spacing. The shrubs and ground cover shall be planted within the limits of the previous tree stand canopy.

d. If the significant tree and tree stand retention requirements of this section create an unnecessary hardship, the applicant may request a modification.

2. The director may administratively approve a modification of the significant tree and tree stand requirements of this section if:

a. The modification is necessary because of special circumstances relating to the location of existing significant trees and tree stands which prevents compliance with this section; and

b. The special circumstances of the subject property make the strict enforcement of the provisions of this section an unnecessary hardship to the property owner; and

c. The special circumstances of the subject property are not the result of the actions of the applicant; and

d. The approving of the modification will not be materially detrimental to the public welfare or injurious to the property or improvements in the vicinity and land use district in which the subject property is located; and

e. The modification is consistent with the purpose and intent of this chapter; and

f. The site design incorporates the retention of other natural vegetation in consolidated locations which promotes the natural vegetated character of the site.

3. When the number of significant trees or tree stands are not retained, they shall be replaced as determined by the department with new trees measuring 1.5-inch caliper if deciduous and four feet high if evergreen, at a replacement rate of 1.5 inches diameter (measured diameter – breast – height) of the removed significant tree or trees within a tree stand. The replacement rate determines the number of replacement trees. The trees removed shall be replaced with trees of the same type, evergreen or deciduous. (Ord. 96-09 § 2, 1996)

18.85.070 Perimeter landscape requirements.

A. Intent. To provide a vegetated screen between uses or land use districts, to screen parking areas and structures located adjacent to public rights-of-way, and to allow visual and physical access to pedestrian and other nonmotorized oriented uses, such as a multipurpose trail or bikeway if those trails could be accommodated without compromising significant vegetation or hazardous slopes.

Three types of landscape screens may apply:

1. A full screen provides a dense vegetated separation between uses and land use districts; and

2. A partial screen provides a moderate vegetated separation between uses and land use districts; and

3. A filtered screen provides a light vegetated separation between uses and land use districts and allows visual access to developments.

As stated in the city’s comprehensive plan:

Whenever new development adjoins a park site, a vegetative buffer shall be required which shall include the preservation and protection of existing vegetation, to visually screen the development year-round from the park.

B. Requirements.

1. Full Screen. Provide:

a. Minimum 70 percent evergreen trees ranging in height from four feet to six feet at the time of planting with at least 50 percent being six feet high; and

b. Deciduous trees with a caliper of at least two inches at the time of planting; and

c. At least 20 percent of the trees shall be native species and drought resistant; and

d. The number of trees is determined by dividing the length of the landscape perimeter by 10 feet; and

e. Evergreen shrubs at least 21 inches in height at the time of planting, spaced no more than three feet on center, to achieve minimum four feet height at maturity; and

f. The number of shrubs is determined by dividing the length of the perimeter by four feet; and

g. Living ground cover shall be planted and spaced to achieve total coverage within three years; and

h. Plants may be clustered within the perimeter to screen structures and parking areas.

Full Screen Plan

Full Screen Section

2. Partial Screen. Provide:

a. Minimum 50 percent evergreen trees ranging in height from four feet to six feet at the time of planting with at least 50 percent being six feet high; and

b. Deciduous trees with a caliper of at least two inches at the time of planting; and

c. At least 20 percent of the trees shall be native species and drought resistant; and

d. The number of trees is determined by dividing the length of the landscape perimeter by 20 feet; and

e. Evergreen shrubs at least 21 inches in height at the time of planting, spaced no more than three feet on center, to achieve minimum four feet height at maturity; and

f. The number of shrubs is determined by dividing the length of the landscape perimeter by five feet; and

g. Living ground cover shall be planted and spaced to achieve total coverage within three years; and

h. Plants may be clustered within the landscape perimeter to screen structures and parking areas.

3. Filtered Screen. Provide:

a. One hundred percent deciduous trees two-inch caliper spaced no more than 30 feet on center; and

b. Evergreen shrubs minimum 21 inches in height at the time of planting spaced no more than three feet on center to provide a continuous hedge achieving a maximum height of three feet at maturity; and

c. Living ground cover shall be planted and spaced to achieve total coverage within three years.

Filtered Screen

C. Standards. The following standards apply to the full screen, partial screen and filtered screen perimeter landscape requirements contained in this section.

1. Existing vegetation may be used in lieu of new plant material if not already being used to meet another requirement, except as otherwise provided in BIMC 18.85.060 (site interior retention of 30 percent of significant tree canopy).

2. A full screen will be required to screen utilities located above ground from adjacent uses.

3. Perimeter landscaping shall be clustered in areas to screen structures, utility structures, loading areas, parking lots, trash enclosures, storage areas and mechanical equipment.

4. The department may approve the averaging of perimeter landscape widths to provide adequate screening if it meets the criteria contained in this section.

5. Earth berms in combination with shrubs and trees may be used to achieve the initial planting height requirement.

6. Minimum landscape perimeter dimensions are allowed when perimeter averaging is applied. The landscape perimeter can be averaged only if the total required perimeter dimension square footage is achieved. The director may allow landscape perimeter averaging if the following criteria is met:

a. Plant material may be clustered to more effectively screen parking areas and structures; and

b. Does not diminish the quality of the perimeter landscape;

c. When significant trees are being retained.

D. Perimeter Landscape Requirements by District. Perimeter landscape requirements are in addition to required parking lot landscape requirements.

The following charts indicate the type of perimeter landscaping required when the subject property directly abuts various zoning districts and land uses:

1. Neighborhood Service Centers (NSCs).

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
Rights-of-way/roads	Filtered Screen	10'	5'
Residential including multifamily	Full Screen	15'	10'
NSCs	Filtered Screen	10'	10'

2. Light Manufacturing (LM) Districts.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
Rights-of-way/roads	Full Screen*	50'	35'
Non-light industrial	Full Screen*	50'	35'
Light manufacturing uses	Partial Screen	15'	10'

*Notwithstanding subsection B.1 of this section, all native shrubs and significant trees shall be retained within all landscape buffers, except that limited removal may be allowed for permitted activities located within the buffer area. If necessary, the existing vegetation shall be supplemented to attain the required screening density.

3. (Water Dependent) Industrial Districts.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
Rights-of-way/roads	Partial Screen	10'	5'
Residential including multifamily	Full Screen	40'	20'
Industrial uses	Partial Screen	10'	0'
Nonindustrial uses	Full Screen	10'	5'

4. Areas Outside Winslow, NSCs, and LM Districts – Nonresidential Uses.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
Rights-of-way/roads	Partial Screen	25'	15'
Residential including multifamily	Full Screen	25'	15'
Nonindustrial uses	Full Screen	20'	10'

5. Winslow Mixed Use Town Center – Central Core, Ferry Terminal**, Gateway, Ericksen and Madison Overlay Districts.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
State highway*	Full Screen	50'	35'
Single-family residential (UR)	Full Screen	20'	15'

*Beginning 100 feet north of Winslow Way. This landscaping requirement shall not apply to the interior renovation of existing buildings.

**For perimeter landscaping requirements in the ferry terminal district transition area, north of Winslow Way, reference BIMC 18.40.031.

6. Urban Multifamily Districts.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
Rights-of-way/roads	Partial Screen	20'	15'
Single-family residential (UR)	Partial Screen	20'	15'
Urban multifamily	Filtered Screen	15'	10'

7. High School Road Districts.

Abutting zoning or land use	Perimeter Landscape Type	Perimeter Dimensions (Width)	Minimum Perimeter Dimensions (Width)
State highway*	Full Screen	50'	35'
Single-family residential (UR, SUR)	Full Screen	20'	15'

*This landscaping requirement shall not apply to the interior renovation of existing buildings.

E. Parking Lot Landscaping.

1. Parking Lot Landscaping for NSCs, LM, (Water Dependent) Industrial and Nonresidential Uses Outside Winslow Mixed Use Town Center. Parking lot landscaping is in addition to required perimeter landscaping.

a. Intent. To screen views of parking lots. To provide shade and visual relief within parking lots, to limit impacts of impervious surfaces and to reinforce safe pedestrian access to buildings.

b. Requirements.

i. Parking Lots Located Adjacent to Public Rights-of-Way. Provide:

(A) One tree for every four parking stalls; and

(B) Minimum 30 percent evergreen trees; and

(C) Deciduous trees minimum two-inch caliper, evergreen trees minimum six feet high at the time of planting; and

(D) Evergreen shrubs minimum 18-inch height at the time of planting spaced no more than three feet on center, to provide a continuous hedge achieving a maximum height of three feet at maturity located adjacent to the rights-of-way (this may be achieved with the perimeter landscape); and

(E) Evergreen ground cover planted and spaced to achieve total coverage within two years; and

(F) Parking lots shall meet the requirements of Chapter 18.81 BIMC; and

(G) A landscaped area at the end of parking aisles; and

(H) Refer to the standards contained in this section for optional planting locations within parking areas.

Parking Adjacent to Right-of-Way

Safe Pedestrian Access

ii. Parking Lots Not Located Adjacent to Public Rights-of-Way. Provide:

(A) One tree for every eight parking stalls; and

(B) One hundred percent of the trees may be deciduous; and

(C) Deciduous trees minimum two-inch caliper, evergreen trees minimum four feet height at the time of planting; and

(D) Evergreen ground cover and/or shrubs planted and spaced to achieve total coverage within two years; and

(E) A landscaped area at the end of parking aisles; and

(F) Parking lots shall meet the requirements of Chapter 18.81 BIMC; and

(G) Refer to the standards contained in this section for optional planting locations within parking areas.

Parking Area Screen

c. Standards. The following standards apply to parking lot landscaping located in NSCs, LM, (water dependent) industrial and nonresidential uses outside Winslow Mixed Use Town Center.

i. Maintain shrubs at a maximum three feet height within parking lots so views between vehicles and pedestrians will not be blocked.

ii. Landscape in planting islands or strips shall have an area of at least 100 square feet and with a narrow dimension of not less than five feet if wheel stops are provided to prevent vehicle overhang. A narrow dimension of not less than eight feet may be provided if the vehicle overhang area is included in the planting area.

iii. Provide permanent curbs or wheel stops to protect the plantings.

iv. Significant trees and tree stands may be used in lieu of new landscape requirements if they are in addition to the significant tree and tree stand retention requirements.

v. Clustering of new plant material within parking lots may be approved or required by the department if the intent of this section is met.

vi. Refer to the suggested landscape materials matrix for tree species appropriate for parking lots.

2. Parking Lot Landscaping for Winslow Mixed Use Town Center Overlay Districts, High School Road and Urban Multifamily Districts.

a. Intent. To soften the appearance of surface parking lots. To provide more intensive landscaping when surface parking lots are exposed to public view.

b. Requirements.

i. Parking Lots Located in the Front of Buildings and Adjacent to Public Rights-of-Way. Provide:

(A) One tree for every two parking stalls; and

(B) One hundred percent of the trees may be deciduous; and

(C) Deciduous trees minimum two-inch caliper; and

(D) Evergreen shrubs planted to form a hedge, minimum 18-inch height at the time of planting, spaced no more than three feet on center, not to exceed a mature height of three feet located adjacent to the public rights-of-way (this may be achieved with the perimeter landscape); and

(E) Deciduous trees minimum two-inch caliper spaced no more than 30 feet on center located along the public rights-of-way (this may be achieved with the perimeter landscape); and

(F) Evergreen ground cover and/or shrubs planted and spaced to achieve total coverage within two years; and

(G) A landscaped area at the end of parking aisles; and

(H) Parking lots shall meet the requirements of Chapter 18.81 BIMC; and

(I) Refer to the standards contained in this section for optional planting locations within parking areas.

ii. Parking Lots Located to the Side of Buildings and Adjacent to Public Rights-of-Way. Provide:

(A) One tree for every four parking stalls; and

(B) One hundred percent of the trees may be deciduous; and

(C) Deciduous trees minimum two-inch caliper; and

(D) Evergreen shrubs planted to form a hedge, minimum 18-inch height at the time of planting, spaced no more three feet on center, not to exceed a mature height of three feet located adjacent to the public rights-of-way (this may be achieved with the perimeter landscape); and

(E) A landscaped area at the end of aisles; and

(F) Parking lots shall meet the requirements of Chapter 18.81 BIMC; and

(G) Deciduous trees minimum two-inch caliper spaced no more than 30 feet on center located along the public rights-of-way (this may be achieved with the perimeter landscape); and

(H) Evergreen ground cover and/or shrubs planted and spaced to achieve total coverage within two years; and

(I) Refer to the standards contained in this section for optional planting locations within parking areas.

iii. Parking Lots Located Behind Buildings and Not Adjacent to Public Rights-of-Way. Provide:

(A) One tree for every eight parking stalls; and

(B) One hundred percent of the trees may be deciduous; and

(C) Deciduous trees minimum two-inch caliper, evergreen trees minimum four feet height at the time of planting; and

(D) Evergreen ground cover and/or shrubs planted and spaced to achieve total coverage within two years; and

(E) A landscaped area at the end of aisles; and

(F) Parking lots shall meet the requirements of Chapter 18.81 BIMC; and

(G) Refer to the standards contained in this section for optional planting locations within parking areas.

c. Standards. The following standards apply to parking lot landscaping located in the Winslow Mixed Use Town Center overlay districts, High School Road, and urban multifamily districts.

i. Maintain shrubs at a maximum three feet height within parking lots so views between vehicles and pedestrians will not be blocked.

ii. Landscape in planting islands or strips shall have an area of at least 100 square feet and with a narrow dimension of not less than five feet if wheel stops are provided to prevent vehicle overhang. A narrow dimension of not less than eight feet may be provided if the vehicle overhang area is included in the planting area.

iii. Provide permanent curbs or wheel stops to protect the plantings from vehicle overhang.

iv. Significant trees and tree stands may be used in lieu of new landscape requirements if they are in addition to the significant tree and tree stand retention requirements.

v. Clustering of new plant material within parking lots may be approved or required by the department if the intent of this section is met.

vi. Refer to the suggested landscape materials matrix for tree species appropriate for parking lots. (Ord. 2006-16 § 2, 2006: Ord. 2005-11 § 7, 2005; Ord. 99-64 § 10, 1999; Ord. 99-30 § 3, 1999; Ord. 99-17 §§ 13, 14, 1999; Ord. 96-09 § 2, 1996)

18.85.090 Planting requirements.

A. Intent. To encourage the use of native species and recommend planting conditions adaptive to Bainbridge Island.

B. Requirements. Landscape designs shall conform to the following provisions:

1. Areas not devoted to landscape required by this chapter, parking, structures and other site improvements are encouraged to be planted or remain in existing vegetation.

2. New plant materials shall include native species or nonnative species that have adapted to the climatic conditions of the coastal region of the Puget Sound Region.

Use of native plants

3. New plant materials shall consist of drought resistant species, except where site conditions within the required landscape areas assure adequate moisture for growth.

4. When the width of any landscape strip is 20 feet or greater, the required trees shall be staggered in two or more rows as illustrated.

5. Existing vegetation may be used to augment new plantings to meet the standards of this chapter.

6. Grass may be used as a ground cover where existing or amended soil conditions assure adequate moisture for growth.

7. Ground cover areas shall contain at least two inches of composted organic mulch at finish grade to minimize evaporation. Mulch shall consist of materials such as composted yard waste, composted sawdust, and/or manure that is fully composted.

8. Existing soils may need to be augmented with fully composted organic material.

C. Performance Assurance.

1. Performance assurance is required to assure the city that the landscape, required by this section, is properly installed, will become established and be adequately maintained.

2. The required landscape shall be installed prior to the issuance of a temporary certificate of occupancy for the project. The Washington landscape architect, Washington certified nursery professional or Washington certified landscaper shall submit a landscaping declaration to the department to verify installation in accordance with the approved plans.

3. The time limit for compliance may be extended to allow installation of landscaping during the next appropriate planting season as approved by the department if the director determines that a performance assurance

device, for a period of not more than one year, will adequately protect the interests of the city. The performance assurance device shall be for 150 percent of the cost of the work or improvements covered by the assurance device. In no case may the property owner delay performance for more than one year.

4. The form and type of the performance assurance device shall be determined by the director.

D. Maintenance Assurance.

1. The property owner shall replace any unhealthy or dead plant materials in conformance with the approved planting plan.

2. A maintenance assurance device shall be required for a period of three years after acceptance by the city of the new planting or transplanting of vegetation to ensure proper installation, establishment, and maintenance.

3. The maintenance assurance device amount shall not be less than 20 percent of the cost of replacing materials covered by the assurance device.

4. The form and type of the maintenance assurance device shall be determined by the director. (Ord. 96-09 § 2, 1996)

18.85.100 Irrigation.

A. Intent. To provide temporary or permanent irrigation within new planting areas that do not have high soil moisture conditions.

B. Requirements.

1. Except for areas of undisturbed existing vegetation, all landscape areas that do not have high soil moisture conditions shall have temporary or permanent irrigation systems. Temporary systems may be removed after 24 months or two growing seasons, whichever occurs first; provided, that the plantings are established.

2. Areas where existing site conditions assure adequate soil moisture for growth within the required landscape area shall have temporary irrigation systems only as required to sustain new plantings.

3. Landscape areas consisting of drought resistant vegetation may require temporary irrigation systems. Permanent irrigation systems located within required landscape areas should include the following features:

a. Moisture or precipitation sensors; and

b. Automatic timers set for operation to assure adequate moisture levels; and

c. Head-to-head spacing, if sprinkler heads are proposed; and

d. Pressure regulating devices; and

e. Backflow prevention devices; and

f. Separate irrigation zones for grass and planting beds; and

g. Other applicable state and city codes.

4. Irrigation water shall be applied with goals of avoiding runoff, low head drainage, overspray, or other similar conditions where water flows onto adjacent property, nonirrigated areas and impervious surfaces by:

a. Considering soil type and infiltration rates; and

b. Using proper irrigation equipment and schedules, including features such as repeat cycles, to closely match application rates with infiltration rates; and

c. Considering special problems posed by irrigation on slopes and in median strips.

5. Irrigation systems shall be subject to the following additional provisions:

a. Systems in landscape strips less than five feet in width shall be designed to ensure that overspray and/or runoff does not occur by use of system design options such as low volume emitters; and

b. Sprinkler heads with consistent application rates shall be selected for proper area coverage, operating pressure, and adjustment capability; and

c. Separate control valves shall be used to irrigate plants with differing water needs. (Ord. 96-09 § 2, 1996)

18.85.110 Maintenance of landscaping and significant trees.

A. Intent. All new landscape plantings and significant trees and tree stands to be retained shall be maintained to preserve the Island’s Forested Character.

B. Requirements.

1. All landscaping, significant trees and tree stands shall be maintained for the life of the project.

2. All landscaped areas required by this chapter, significant trees and tree stands, except within critical areas or their protective buffers (defined in Chapter 16.20 BIMC), should be maintained in a healthy growing condition.

3. Landscape areas shall be kept free of trash.

4. All plant material shall be managed by pruning so that plant growth does not conflict with public utilities, restrict pedestrian or vehicular access, or create a traffic hazard. (Ord. 96-09 § 2, 1996)

18.85.120 Suggested landscape materials matrix.

NOTE: This matrix provides a list of suggested plant materials recommended for use on Bainbridge Island. Additional plants may be added to this list as deemed appropriate by the department. Plants shall be selected based upon site-specific conditions which may affect plant growth such as sun exposure, soil types, shoreline conditions, adjacent site improvements, etc. Plant material selection shall be coordinated with utility company requirements to avoid conflicts.

			Parking lot trees
			|	Landscape buffer areas
			|	|	Critical areas – Uplands
			|	|	|	Critical areas – Wetlands/streams
			|	|	|	|	Native species
			|	|	|	|	|	Drought resistant
			|	|	|	|	|	|	Shoreline
			|	|	|	|	|	|	|	Trees near util. lines
			|	|	|	|	|	|	|	|
Large deciduous trees
	Acer macrophyllum	Bigleaf Maple			X	X	X
	Acer rubrum species	Red Maple variety	X	X					X
	Acer saccharum	Sugar Maple	X	X
	Acer platanoides species	Norway Maple variety	X	X					X
	Alnus oregona	Red Alder			X	X	X	X
	Fagus sylvatica	European Beech		X				X	X
	Fraxinus latifolia	Oregon Ash			X	X	X
	Gingko biloba ‘Sentry’	Columnar Maidenhair		X				X
	Liquidambar styraciflua	American Sweet Gum	X	X				X	X
	Liriodendron tulipifera	Tulip Tree		X
	Platanus x acerifolia	London Plane		X
	Populus trichocarpa	Black Cottonwood				X	X
	Quercus species	Oak variety	X	X				X
	Quercus robur ‘Fastigiata’	Upright English Oak	X	X				X	X
	Quercus rubra species	Eastern Red Oak	X	X				X
	Salix species	Willow variety				X	X		X
	Tilia cordata	Littleleaf Linden	X	X					X
Medium deciduous trees
	Acer campestre	Hedge Maple	X					X		X
	Betula species	Birch variety		X
	Carpinus betulus	European Hornbeam	X	X				X	X
	Cercidiphyllum japonicum	Katsura Tree		X
	Cornus species	Dogwood variety			X		X	X
	Fraxinus pennsylvanica ‘Marshall’	Marshall’s Seedless Ash	X	X				X
	Populus tremuloides	Quaking Aspen				X	X
	Prunus species	Flowering Cherry variety	X	X				X	X
	Pyrus calleryana species	Flowering Pear variety	X	X				X
	Zelkova serrata ‘Village Green’	Sawleaf Zelkova	X	X
Small deciduous trees
	Acer circinatum	Vine Maple		X	X	X	X			X
	Acer davidii	David Maple		X
	Acer ginnala	Amur Maple	X	X					X	X
	Acer palmatum	Japanese Maple		X						X
	Amelanchier species	Serviceberry variety		X	X	X	X			X
	Carpinus species	Hornbeam variety	X	X				X	X
	Cornus florida	Eastern Dogwood		X						X
	Cornus kousa	Kousa Dogwood	X	X						X
	Corylus cornuta californica	Western Hazelnut		X	X		X	X		X
	Crataegus species	Hawthorn variety		X	X		X	X	X	X
	Magnolia species	Magnolia variety	X	X					X	X
	Malus species	Flowering Crabapple		X						X
	Prunus species	Flowering Cherry Plum		X				X	X	X
	Rhus typhina	Staghorn Sumac		X	X		X	X		X
	Styrax japonica	Japanese Snowball		X						X
Evergreen trees
	Abies grandis	Grand Fir		X	X		X
	Cedrus deodara	Deodar Cedar		X				X	X
	Chamaecyparis lawsoniana	Port Orford Cedar		X	X		X	X	X
	Chamaecyparis nootkatensis	Alaska Cedar		X	X		X	X	X
	Calocedrus decurrens	Incense Cedar		X
	Picea sitchensis	Sitka Spruce		X		X	X		X
	Pinus contorta	Shore Pine	X	X	X		X	X	X
	Pinus contorta latifolia	Lodgepole Pine		X				X	X
	Pinus densiflora	Japanese Red Pine		X				X
	Pinus monticola	Western White Pine		X	X		X	X
	Pinus nigra	Austrian Black Pine	X	X				X	X
	Pinus ponderosa	Ponderosa Pine		X				X
	Pinus sylvestris	Scotch Pine	X	X				X	X
	Pinus thunbergii	Japanese Black Pine		X				X	X
	Pseurdotsuga menziesii	Douglas Fir		X	X		X	X	X
	Sequoidendron sempervirens	Coastal Sequoia		X					X
	Taxus brevifolia	Western Yew		X		X	X		X
	Thuja plicata	Western Red Cedar		X		X	X
	Tsuga heterophylla	Western Hemlock		X		X	X	X
Deciduous shrubs
	Amelanchier alnifo