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HomeMy WebLinkAboutPACKET Parks Advisory Board 2016-1-15 Town of Estes Park, Larimer County, Colorado, December 18th, 2015 Minutes of a Regular meeting of the Parks Advisory Board of the Town of Estes Park, Larimer County, Colorado. Meeting held in the Town Hall Rooms 202 & 203, in said Town of Estes Park on the 18th day of December, 2015. Present: Merle Moore Celine Lebeau Dewain Lockwood Terry Rustin Ronna Boles Carlie Bangs Vicki Papineau Also Present: Greg Muhonen, Director of Public Works Bob Holcomb, Trustee Liaison Kevin McEachern, Public Works Operations Manager Brian Berg, Parks Division Supervisor Sam Phillips, Contract Administrative Assistant Chair Lebeau called the meeting to order at 11:05 a.m. GENERAL BUSINESS It was moved and seconded (Lockwood/Boles) to approve the November meeting minutes and the motion passed unanimously. Chair Lebeau formally introduced the two new members, Carlie Bangs and Vicki Papineau, who have officially been appointed to the Parks Advisory Board. AIPP FINALIZATION Merle Moore presented the inventory sheets which link certain artwork to a particular location and emphasized that there should be an update for name changes to park locations so the inventory list is accurate and doesn’t become confusing. Chair Lebeau made a motion to send the AIPP policy to Lancaster (after cosmetic updates) for final authorization and signature. It was moved and seconded (Lockwood/Bangs) for approval. POLICY DISCUSSION Parks Maintenance Supervisor Brain Berg initiated discussion regarding the Naming of Town-Owned Property and Facilities policy. The goal of this policy is to structure the process for naming of Town-owned property and facilities. The Board issued no further comments on this policy. The decision was made to take it to Assistant Town Administrator, Travis Machalek, for approval with staff and movement for finalization to the Town Board. Chair Lebeau made a motion for approval of Naming of Town-Owned Property and Facilities. The motion was moved and seconded (Lockwood/Boles). NEW PROJECT SELECTION Brian Berg expanded on the Tree Board ordinance to further clarify purpose for the new Board members. Under this ordinance, if you have a Beetle infested tree, specifically Pine Beetle, Estes Park citizens are in charge of taking it down immediately before it has the chance to spread. Currently, there exists a Tree Protection Zone Ordinance to protect the larger trees and their root zones during construction. Parks Advisory Board – December 18th, 2015 – Page 2 Brian Berg gave a sneak peak presentation of the Musical Walkway addition. He suggested that we add “Wee Notes” to make it a walkway. The proper process must be followed including paperwork for official quote and completion of artwork donation form. The musical walkway is expected to be installed before Mayor Bill Pinkham’s term expires, weather permitting. Public Works Director Greg Muhonen questioned if since it is mass produced, is it within the PAB AIPP jurisdiction to make a decision on it due to the fact that it doesn’t fall under mandates of the Parks policy. In the Spring, hoping to do paver work of musical notes to highlight it. Chair Lebeau argued that is appropriate for the Board to approve, just not under the AIPP policy and should be added to next month’s agenda. Trustee Liaison voiced concern involving vandalism. Chair Lebeau discussed the possibility of putting a lighted walkway in hopes that it might deter vandalism. Ronna Boles suggested elk signage in the area of the musical instruments as a deterrent and warning for visitors who use the area. Options that were discussed included temporary log fences surrounding the area. While discussing new project selections, the Board also reevaluated their agenda items and decided that it would be the most effective method to list all active projects starting at their conception and promptly remove the item after completion. OTHER BUSINESS Officer elections for the Chair and Vice-Chair will be held in January. An update was given that the River coalition is working on a grant application to restore the riverbank at the Visitor’s Center. A large rock and the north bank were displaced. Currently, The Town has no project identified to repair that river bank. The River coalition is in the process of scheduling funds for repair. The Parks department is remodeling the landscape bed adjacent to Elkhorn Avenue in front of the library. Involving the new Transit Hub Parking Structure, the Parks Department’s main focus is the significant landscape feature to be featured on the East face of that structure. Discussion of a landscape plan has not yet been initiated. Also, not yet determined is whether or not the landscape plan will need to be presented to the PAB. With no other business to discuss, a motion was made and seconded (Boles/Moore) to adjourn the meeting at 12:08 pm, with all voting in favor. • Chapter 8.05 - Beetle-Infested Trees • 8.05.010 - Definitions. Modified In this Chapter, the following words shall have the following meanings, unless the context clearly requires otherwise: Destruction means cutting and chipping an infested tree; or other method of disposing of an infested tree approved by the Director. Director means the Public Works Director of the Town or his or her designated agent(s). Douglas fir beetle means the species Dendroctonus pseudotsugae. Infested tree means (i) a tree, alive or dead, which is infested with the mountain pine beetle, spruce ips beetle and/or Douglas fir beetle; and (ii) any species or variety of tree that is dead or substantially dead, and all deadwood to which the bark is still attached which, because of their condition, may serve as a breeding place for the mountain pine beetle, spruce ips beetle and/or Douglas fir beetle. Mountain pine beetle means the species Dendroctonus ponderosae. Occupant means any person in physical possession of any lot, tract or parcel of real property located within the corporate limits of the Town who is not the owner of such property. For the purposes of this Chapter, occupant does not include the owner of an easement or right-of- way across property. Owner or landowner means any person who owns any lot, tract or parcel of real property located within the corporate limits of the Town. Person means an individual, association, partnership, corporation or other legal entity. Property means any lot, tract or parcel of real property located within the corporate limits of the Town. Spruce ips beetle means the species Ips hunter and Ips pilifrons. (Ord. 08-08 §1, 2008) • 8.05.020 - Duty of landowner and occupant to permit inspection. An owner or occupant, whose property may have located on it one (1) or more infested tree(s), shall allow the Director to enter such property for the purpose of immediate inspection of the trees located upon such property when at least one (1) of the following events has occurred: (1) The owner or occupant has requested the inspection; (2) A neighboring landowner or occupant has reported a suspected infested tree and requested an inspection; or (3) The Director has made a visual observation from a public right-of-way or area and has reason to believe that infested tree or trees exist on the property of the owner or occupant. (Ord. 08-08 §1, 2008) • 8.05.030 - Inspection for infested trees. (a) Subject to the requirements and limitations of this Section, the Director shall have the right to enter upon any property, whether public or private, during reasonable hours for the purpose of inspecting for the existence of an infested tree when at least one (1) of the three (3) events described in Section 8.05.020 has occurred. However, no agent or employee of the Town shall enter upon any property to inspect for an infested tree without the permission of the owner or occupant or without an inspection warrant issued pursuant to this Section. (b) If verbal permission to inspect the property is not obtained from the affected owner or occupant, the Town shall send written notice to the landowner and any occupant of the property advising that the Director desires to inspect the property for an infested tree. The notice shall be sent by certified mail. The notice may be sent to the landowner at the address to which tax notices are sent according to the records of the County Treasurer and to the occupant at the property address. Alternatively, the Director may personally serve such notice upon the affected owner or occupant. Where possible, inspections shall be scheduled and conducted with the concurrence of the owner or occupant. (c) If permission to enter upon and inspect the property is not obtained within ten (10) days after the notice described in Subsection (b) of this Section has been received, or within ten (10) days of date of service if the notice is personally served, the Director may request that an inspection warrant be issued by the Municipal Court. The Municipal Court Judge shall issue an inspection warrant upon presentation by the Director of an affidavit satisfying the requirements of Rule 241(b)(2) of the Colorado Municipal Court Rules of Procedure. The Municipal Court Judge may issue an area-wide inspection warrant pursuant to this Section unless otherwise prohibited by law. (d) In case of an emergency involving imminent danger to public health, safety or welfare, the Director may enter the property to conduct an emergency inspection without a warrant and without complying with the requirements of this Section. (Ord. 08-08 §1, 2008) • 8.05.040 - Notice of infestation and removal. (a) If the Director determines that property contains one (1) or more infested trees, the Director shall notify the owner and any occupant of the property. Such notice shall be given either by certified mail or personal delivery. (b) The notice shall: (1) Advise the owner and occupant that the property contains one (1) or more infested trees; (2) Advise the owner and occupant of Town-approved methods for the removal and destruction of infested trees; and (3) Advise the owner and occupant that all infested trees must be removed within ten (10) days following receipt of the notice, or that an acceptable plan and schedule for removal of the infested trees must be submitted to the Director within such ten-day period. (Ord. 08-08 §1, 2008) • 8.05.050 - Abatement order. (a) In the event the owner fails to comply with the Director's notice as described in Section 8.05.040 by removing the infested trees or submitting an acceptable schedule for such removal within the applicable ten-day period, the Town has the authority to provide for and complete the removal by obtaining and acting on an abatement order. (b) Upon the expiration of the period of notice, or at any time thereafter, if the required action has not taken place, the Town may apply to the Municipal Court for an abatement order. (c) An application for an abatement order shall be accompanied by an affidavit affirming that: (1) The Director has determined that the subject property has one (1) or more infested trees; (2) The Director has complied with the notice requirements of Section 8.05.040; and (3) The owner has failed to remove the infested trees, has failed to submit an acceptable plan for removal of the infested trees within the required time or has failed to remove the infested trees pursuant to the accepted plan. (d) The Town shall give notice to the owner and any occupant of the property of its application for an abatement order either by certified mail or by personal service of the notice. (e) The notice of application for an abatement order shall include a copy of the Town's application and its affidavit in support thereof, as well as the date, time and place at which the Town will appear before the Municipal Court to request entry of the abatement order. (f) At the stated time, date and place, the Municipal Court Judge shall review the Town's application for an abatement order, the affidavit and any statement of the Town offered in support thereof, as well as any statement and evidence presented by the owner or occupant, if present. (g) The Municipal Court Judge shall issue an abatement order if: (1) The subject property has one (1) or more infested trees; (2) The Director has complied with the notice requirements of Section 8.05.040; and (3) The owner has failed to remove the infested trees, has failed to submit an acceptable plan and schedule for removal of the infested trees within the required time or has failed to remove the infested trees pursuant to the accepted plan. (h) An owner is responsible under this Chapter for any infested trees permitted to remain on the owner's property after the Director has given notice of a violation pursuant to Section 8.05.040. (i) In case of an emergency involving imminent danger to public health, safety or welfare, the Town may authorize immediate removal of any infested tree without notice or an abatement order. (j) The Town may pursue the remedies set forth in this Section with or without filing a complaint in the Municipal Court, at the Town's sole discretion. (k) The owner shall be assessed twice the whole cost of removal of the infested trees from the property, including administrative fees incurred by the Town. If all of the costs and charges incurred by the Town are not paid within thirty (30) days of the date of the assessment, the unpaid costs shall be certified to the County Treasurer for collection in the same manner as real property taxes. (Ord. 08-08 §1, 2008) • 8.05.060 - Unlawful acts. (a) It shall be unlawful and a violation of this Code for any owner to fail or refuse to remove all infested trees from his or her property within the time period provided for in a notice of violation sent by the Director pursuant to Section 8.05.040 of this Chapter. (b) It shall be unlawful and a violation of this Code for any owner or occupant to deny the Director access to the property owned or occupied by the owner or occupant if the Director presents an inspection warrant issued pursuant to this Chapter. (c) It shall be unlawful and a violation of this Code for any person to expose for sale, offer for sale, transfer, give away or offer to give away any infested tree anywhere within the Town. (Ord. 08-08 §1, 2008) • 8.05.070 - Applicability. The provisions of this Chapter shall apply to all public and private lands within the corporate limits of the Town. (Ord. 08-08 §1, 2008) 8.04.030 - Noxious weeds. Modified It is unlawful for the owner, occupant or any agent in charge of any lot, block or parcel of land within the Town to allow, permit or fail to manage noxious weeds growing or remaining when grown upon the property or on or along any alleys or sidewalk areas adjacent to the property.Noxious weeds shall be defined as species listed in the Larimer County noxious weed list or the Colorado Department of Agriculture noxious weed list as a noxious weed. Failure to manage a noxious weed is failure to prevent the plant from establishing, growing, reproducing or dispersing itself. Management methods include, but are not limited to, chemical treatment approved by the Colorado Department of Agriculture or mechanical cutting prior to seed maturity, including removal and proper disposal. (Ord. 15-97, 1997; Ord. 05-09 §1, 2009) City of Boulder • Chapter 6 - Protection of Trees and Plants[19] • 6-6-1. - Legislative Intent. (a) The purpose of this chapter is to protect the public health, safety, and welfare by prescribing requirements for the protection of trees and plants within the city, including, without limitation, trees, shrubs, lawns, and all other landscaping. (b) The city council finds that all trees, plants, and other landscaping located, standing or growing within or upon city property, including, without limitation, any city-owned or controlled street, alley, rights of way, or other public place or city or mountain park, recreation area or open space, belong to the city and are a community asset comprising a part of the public infrastructure. (c) The city council finds that the requirements of this chapter are necessary to ensure the continued protection, maintenance, replacement, and management of city-owned trees, plants, and other landscaping. • 6-6-2. - Removal of Dead, Diseased, or Dangerous Trees. (a) The city manager may enter upon any premises without a warrant to inspect all trees and plants in the city. (b) If the city manager finds that there exist on any private property in the city dead trees or overhanging limbs that pose a danger to persons or property, the manager will notify the owner, lessee, agent, occupant, or other person in possession or control of the property upon which the condition exists of the duty to remedy the condition within fifteen days from the date of the notice or such shorter time as the manager finds appropriate in view of the nature and extent of the condition. (c) If the city manager determines that any tree growing on private property within the city is afflicted with any dangerous or infectious insect infestation or disease, the manager will notify the owner, lessee, agent, occupant, or other person in possession and control of the property of the condition and order such person to take specific prescribed measures that the manager determines are reasonably necessary to cure the infestation or disease and to prevent its spread, within fifteen days from the date of the notice or such time as the manager finds appropriate in view of the nature and extent of the condition. If necessary to address a dangerous or infectious insect infestation or disease, the city manager may require that work shall be completed under the supervision of a certified arborist that has a valid contractor license pursuant to Chapter 4-28, "Tree Contractor License," B.R.C. 1981. (d) If the person notified pursuant to Subsection (b) or (c) of this section fails to correct the condition as required by the notice prescribed in such subsection, except in cases of extreme emergency, the city manager may enter the property, pursuant to an administrative warrant issued by the municipal court, and correct the condition and charge the costs of such correction, plus an additional amount of $25 for administrative costs, to the owner and to the lessee, agent, occupant, or other person in possession and control of the property. If any property owner fails or refuses to pay when due any charge imposed under this section, the city manager may certify due and unpaid charges, including interest, to the Boulder County Treasurer for collection, as provided in Section 2-2-12, "City Manager May Certify Taxes, Charges, and Assessments to County Treasurer for Collection," B.R.C. 1981. (e) Notice under this section is sufficient if it is deposited in the mail first class to the address of the last known owner of property on the records of the Boulder County Assessor or to the last known address of the lessee, agent, occupant, or other person in possession or control of the property. (f) Nothing in this section shall be deemed to prohibit the city manager from taking such steps to correct an immediate threat to the public health, safety or welfare that the manager determines is posed by such diseased, dead, or dangerous trees. (g) The city manager may prune, spray, or remove any diseased or infested tree on private property upon the written request of the property owner or a lessee, agent, occupant, or other person in possession or control of the property if such person agrees in writing to pay for the costs of such service. Ordinance No. 7712 (2011) • 6-6-3. - City Manager Will Supervise Planting. The city manager will supervise reforestation; regulate the preservation, culture, and planting of plants on city property; prune, spray, cultivate, and otherwise maintain such plants; prune or direct the time and method of pruning such plants; and take such measures as the manager deems necessary to prevent, control, and exterminate weeds, insects, and other pests and plant diseases. • 6-6-4. - Planting in Public Areas. (a) No person shall plant in or remove from any city property any plant or tree without first obtaining written permission from the city manager to do so. (b) No person shall plant in or remove from any public right of way or public easement any plant or tree without complying with the requirements set forth in Chapter 8-5, "Work in the Public Right of Way and Public Easements," B.R.C. 1981. (c) The planting, maintaining, relocating, or removing of any tree or plant located within any public right of way or public easement shall conform with the standards in the City of Boulder Design and Construction Standards. (d) A property owner may plant trees along the streets of the city, fronting on such person's property, if the person plants the trees of the species, in the places, and in the manner set forth in the City of Boulder Design and Construction Standards or as designated by the city manager, between the gutter line and the property line. Ordinance Nos. 7831 (2012); 7965 (2014) • 6-6-5. - Spraying and Pruning. (a) No person except the city manager shall spray, mulch, fertilize, or otherwise treat, remove, destroy, break, cut or prune any living plant or any part thereof growing on city property without first having obtained permission from the manager. (b) No person authorized by the city manager to cut or prune a plant on city property shall do so except in the manner prescribed by the manager. • 6-6-6. - Protection of Trees and Plants. (a) No person shall remove, damage, or destroy any tree or plant growing within or upon any city-owned or controlled property, except for public rights of way, without first having obtained written permission from the city manager. (b) No person shall remove, damage, or destroy any tree or plant growing within or upon any public right of way without first having obtained a permit pursuant to Chapter 8-5, "Work in the Public Right of Way and Public Easements," B.R.C. 1981. (c) No person shall attach to or install on any tree or plant growing within or upon any City-owned or controlled property, including public rights-of-way, without first having obtained approval from the city manager, any metal material, sign, cable, wire, nail, swing or other material foreign to the natural structure of the tree, except materials used for standard tree care or maintenance, such as bracing and cabling, installed by tree professionals. (d) No person shall attach any electric insulator or any device for holding electric wires to any tree or plant growing or planted upon any city property. No person owning any wire charged with electricity running through public property shall fail to fasten such wire securely to a post or other structure so that it will not contact any plant. If the city manager determines it is necessary to prune or cut down any plant growing on city property in the City across which electric wires run, no person owning such wires shall fail to remove any such wire or to discontinue electric service within twenty-four hours after being notified by the manager of the scheduled pruning or cutting of the trees. (e) No person owning or operating a gas pipe or main within a radius of forty feet of any tree or plant shall fail to repair the same immediately if a leak occurs and stop such leak in order to protect the plant and the public health, safety and welfare. (f) No person shall perform any work or construction within or upon any City-owned property, public right of way or public easement without providing tree protection in conformance with the City of Boulder Design and Construction Standards. (g) No person shall engage in the business of cutting, pruning, removing or applying pesticides to any trees on public or private property within the City for commercial gain or profit without first obtaining from the city manager a license under this chapter. Ordinance No. 7712 (2011) • 6-6-7. - Mitigation of Trees or Plants Removed or Destroyed. No person shall remove or destroy any tree or plant in the public right-of-way without first having a plan approved by the city manager for the mitigation of the loss of such tree or plant. The removed or destroyed tree or plant shall be replaced in an amount equivalent to the value, as determined by the city manager, of the tree, shrub or plant that existed prior to loss, by: (a) Planting or transplanting an approved tree or plant of the same species and size as previously existed in a location approved by the city manager; (b) Planting one or more approved trees or plants where the combined value equals or exceeds that which previously existed in terms of species, condition and size, in a location approved by the city manager; or (c) Reimbursement of the City for the value of the tree or plant removed or destroyed subject to a determination by the city manager that the trees or plants lost could not be adequately replaced at or near the location where the loss occurred. (d) All tree plantings required for the mitigation of a tree removed or destroyed from the public right of way shall be completed under the supervision of a certified arborist that has a valid contractor license pursuant to chapter 4-28, "Tree Contractor License," B.R.C. 1981. Ordinance No. 7712 (2011) • 6-6-8. - City Manager Authorized to Issue Rules. The city manager is authorized to adopt rules, pursuant to chapter 1-4, "Rulemaking," B.R.C. 1981, that are reasonably necessary to implement the requirements of this chapter. Ordinance No. 7712 (2011) Page 1 Fort Collins 3.2.1 - Landscaping and Tree Protection (D) Tree Planting Standards. All developments shall establish groves and belts of trees along all city streets, in and around parking lots, and in all landscape areas that are located within fifty (50) feet of any building or structure in order to establish at least a partial urban tree canopy. The groves and belts may also be combined or interspersed with other landscape areas in remaining portions of the development to accommodate views and functions such as active recreation and storm drainage. (1) Minimum Plantings/Description. These tree standards require at least a minimum tree canopy but are not intended to limit additional tree plantings in any remaining portions of the development. Groves and belts of trees shall be required as follows: (a) parking lot landscaping in accordance with the parking lot landscaping standards as set forth in this Section and in Section 3.2.2. Access, Circulation and Parking; (b) street tree planting in accordance with the Larimer County Urban Area Street Standards or other street tree planting as defined in subsection (2)(b) or (c) below; (c) "full tree stocking" shall be required in all landscape areas within fifty (50) feet of any building or structure as further described below. Landscape areas shall be provided in adequate numbers, locations and dimensions to allow full tree stocking to occur along all high use or high visibility sides of any building or structure. Such landscape areas shall extend at least seven (7) feet from any building or structure wall and contain at least fifty-five (55) square feet of nonpaved ground area, except that any planting cutouts in walkways shall contain at least sixteen (16) square feet. Planting cutouts, planters or other landscape areas for tree planting shall be provided within any walkway that is twelve (12) feet or greater in width adjoining a vehicle use area that is not covered with an overhead fixture or canopy that would prevent growth and maturity. Full tree stocking shall mean formal or informal groupings of trees planted according to the following spacing dimensions: Tree Type Minimum/Maximum Spacing Canopy shade trees 30'—40' spacing Coniferous evergreens 20'—40' spacing Page 2 Ornamental trees 20'—40' spacing (F) Tree Protection and Replacement. Existing significant trees within the LOD and within natural area buffer zones shall be preserved to the extent reasonably feasible and may help satisfy the landscaping requirements of this Section as set forth above. Such trees shall be considered "protected" trees within the meaning of this Section, subject to the exceptions contained in subsection (2) below. Streets, buildings and lot layouts shall be designed to minimize the disturbance to significant existing trees. All required landscape plans shall accurately identify the locations, species, size and condition of all significant trees, each labeled showing the applicant's intent to either remove, transplant or protect. Where it is not feasible to protect and retain significant existing tree(s) or to transplant them to another on-site location, the applicant shall replace such tree(s) according to the following schedule and requirements. Replacement trees shall be used to satisfy the tree planting standards of this Section. Replacement trees shall be planted either on the development site or in the closest available and suitable planting site. The closest available and suitable planting site shall be selected within one-half (½) mile (2,640 feet) of the development site, subject to the following exceptions. If suitable planting sites for all of the mitigation trees are not available within one-half (½) mile (2,640 feet) of the development, then the planting site shall be selected within one (1) mile (5,280 feet) of the development site. If suitable planting sites are not available for all of the mitigation trees within one (1) mile (5,280 feet) of the development site, then the City Forester shall determine the most suitable planting location within the City's boundaries as close to the development site as feasible. (1) A significant tree that is removed shall be replaced with not less than one (1) or more than six (6) replacement trees sufficient to mitigate the loss of value of the removed significant tree. Notwithstanding the foregoing, significant Siberian elm and Russian olive trees located in a natural habitat buffer found to contain ecological value, as provided in paragraph 3.4.1(D)(1) of this Code, shall be mitigated in accordance with subparagraph 3.4.1(E)(2)(b) of this Code. The applicant shall select either the City Forester or a qualified landscape appraiser to determine such loss based upon an appraisal, including, but not limited to, shade, canopy, aesthetic, environmental and ecological value of the tree to be removed and by using the species and location criteria in the most recent published appraisal guide by the Council of Tree and Landscape Appraisers. Replacement trees shall meet the following minimum size requirements: (a) Canopy Shade Trees: 3.0" caliper balled and burlap or equivalent. (b) Ornamental Trees: 2.5" caliper balled and burlap or equivalent. (c) Evergreen Trees: 8' height balled and burlap or equivalent. (2) Trees that meet one (1) or more of the following removal criteria shall be exempt from the requirements of this subsection: Page 3 (a) dead, dying or naturally fallen trees, or trees found to be a threat to public health, safety or welfare; (b) trees that are determined by the City to substantially obstruct clear visibility at driveways and intersections; (c) Siberian elm less than eleven (11) inches DBH and Russian olive less than eight (8) inches DBH; (d) Russian olive and Siberian elm of wild or volunteer origin, such as those that have sprouted from seed along fence lines, near structures or in other unsuitable locations; (e) Russian olive and Siberian elm determined by the City Forester to be in poor condition. (3) All existing street trees that are located on city rights-of-way abutting the development shall be accurately identified by species, size, location and condition on required landscape plans, and shall be preserved and protected in accordance with the standards of subsection (G). (G) Tree Protection Specifications. The following tree protection specifications should be followed to the maximum extent feasible for all projects with protected existing trees. (1) Within the drip line of any protected existing tree, there shall be no cut or fill over a four-inch depth unless a qualified arborist or forester has evaluated and approved the disturbance. (2) All protected existing trees shall be pruned to the City of Fort Collins Forestry standards. (3) Prior to and during construction, barriers shall be erected around all protected existing trees with such barriers to be of orange fencing a minimum of four (4) feet in height, secured with metal T-posts, no closer than six (6) feet from the trunk or one-half (½) of the drip line, whichever is greater. There shall be no storage or movement of equipment, material, debris or fill within the fenced tree protection zone. (4) During the construction stage of development, the applicant shall prevent the cleaning of equipment or material or the storage and disposal of waste material such as paints, oils, solvents, asphalt, concrete, motor oil or any other material harmful to the life of a tree within the drip line of any protected tree or group of trees. (5) No damaging attachment, wires, signs or permits may be fastened to any protected tree. (6) Large property areas containing protected trees and separated from construction or land clearing areas, road rights-of-way and utility easements may be "ribboned off," rather than erecting protective fencing around each tree as required in subsection (G)(3) above. This may be accomplished by placing metal t-post stakes a maximum of fifty (50) feet apart and tying ribbon or rope from stake-to-stake along the outside perimeters of such areas being cleared. (7) The installation of utilities, irrigation lines or any underground fixture requiring excavation deeper than six (6) inches shall be accomplished by boring under the root system of protected existing trees at a minimum depth of twenty-four (24) inches. [ [ [ [ [ [ [ I~ I [ [ [ CITY AND COUNTY OF DENVER NATURAL RES ~OURCES TREE RETENTJO AND PROTECTION SPE CIFI CA TIONS [ [ [ [ [ ~ I I [ [ I [ 0 0 0 0 0 I I D 0 I I 0 0 D 0 D 0 SECTION 02150 TREE RETENTION AND PROTECTION PART 1: GENERAL 1.1 1.2 1.3 RELATED DOCUMENTS: The General Contract Conditions, Drawings, and Division - 1 Specification sections apply to Work of this section. SUMMARY: The work of this section consists of retaining and protection of trees during the construction of the project. GENERAL REQUIREMENTS: A. B. c. D. E. F. There should be daily supervision of field crews by the City Forestry Staff or Project Consulting Arborist during the critical phases of the project: for example, demolition of existing concrete; root pruning; construction of retaining walls and construction of new curb or sidewalk in tree protection areas. City Forester may require a consulting arborist be hired to oversee the project. If it appears that the completion of the construction may cause damage to the branches of any tree, the Contractor shall contact the City Forester's Office. The Forester will make a determination as to whether such damage is eminent. To prevent or minimize soil compaction, designated routes for equipment and foot traffic by work crews shall be determined prior to commencing construction activities, and shall be indicated in the tree protection plan to be submitted by Contractor. These routes shall be marked at the site, prior to commencement of construction, with tree protection fencing and signage as specified in Paragraphs 3.6 and 3.7 of this section. A Tree Protection Plan shall be submitted and approved. Motorized equipment and trailers, including tractors, bobcats, bulldozers, trackhoes, trucks, cars, and carts shall not be allowed access within tree protection areas. Should access be necessary within designated tree protection areas, the existing grade shall be covered with six (6) to eight (8) inches of wood mulch to help distribute the weight of equipment and to minimize soil compaction and rutting. Plywood and/or mulch is not acceptable bridging material for driving over exposed tree roots. Exposed tree roots shall not be driven over. The City Forester or Project Consulting Arborist shall be notified and shall approve of the access and driving surface prior to its use. Materials and supplies shall not be stockpiled or stored within the tree protection area. Should temporary storage be necessary within designated tree protection areas, the existing grade shall be covered with double, overlapping sheets of% inch thick plywood, . or six (6) to eight (8) inches of wood mulch to help distribute the weight of materials or supplies and to minimize soil compaction. Under no circumstances shall any objects or materials be leaned against or supported by a tree's trunk, branches, or exposed roots. The attachment or installation to trees of any sign, cable, wire, nail, swing, or any other material that is not needed to help support the natural structure of the tree is prohibited. Standard arboricultural techniques such as bracing or cabling that are performed by professional arborists are acceptable upon Contract No. XX DPR Standard Specifications 02150-1 Rev 3/28/03 1.4 G. approval by the City Forester or Project Consulting Arborist. Appropriate tree pruning and/or removal permits must be secured prior to beginning work. DEFINITIONS: A. TREE PROTECTION AREA: Generally, a tree protection area should consist of the ground encompassing from 1.5 (minimum) to 2.0 times the distance between the trunk and drip line, or one linear foot away from the trunk base for every inch diameter of the trunk, whichever is greater. (See section below). Areas of ground covered by pavement, buildings, or other permanent structures where the presence of roots is minimal or negligible, are excluded. The area under or within the tree's dripline is also referred to as the "Critical Root Zone" (see below). B. 1. With groups of trees or where an array effect is present, there may be discontinuous (non-overlapping) perimeters of tree protection areas, which result in difficult to maintain or ineffectiv:e tree protection fencing. In these cases, even though tree protection areas do not overlap, they should be treated as though they do if the distance between the perimeters of such areas is less than thirty (30) feet. In effect, this will artificially enlarge the area of tree protection, but will result in a more clearly defined, manageable area. DRIP LINE: The outermost edge of the tree's canopy or branch spread. The area within a tree's dripline is all the ground under the total branch spread. C. CRITICAL ROOT ZONE: Generally, all of the ground area included in the dripline. D. E. F. DIAMETER (CALIPER): The size (in inches) of a tree's trunk is measured at: 1. six (6) inches above grade for trunk diameters up to and including four (4) inches; 2. twelve (12) inches above grade for trunk diameters from four (4) inches up to and including eight (8) inches; and 3. four and a half (4lh) feet above grade for trunk diameters greater than eight (8) inches; in accordance with guidelines established in the "Guide for Plant Appraisal". All measurements should be rounded to the nearest inch. HIGH-VALUE SHRUB: Any specimen shrub with an appraised value of $100.00 or more. PROJECT CONSULTING ARBORIST: An independent consultant with a degree in a field related to arboriculture, and at least five years field experience in tree preservation or on-site monitoring of public works or construction projects involving tree retention and protection. The Consultant should be an active member in the American Society of Consulting Arborists and International Society of Arboriculture. Contract No. XX DPR Standard Specifications 02150-2 Rev 3/28/03 [ [ [ [ [ I [ [ I I I [ [ [ [ [ [ D c 0 0 0 I 0 0 I I D 0 c [ [ 1.5 REFERENCE STANDARDS AND GUIDELINES: A. Contractor shall comply with applicable requirements and recommendations of the most current versions of the following standards and guidelines. Where these conflict with other specified requirements, the more restrictive requirements shall govern. 1. 2. 3. 4. ANSI 2133.1-1988: American National Standard for Tree Care Operations ANSI A300-1994: Standard Practices for Trees, Shrubs and Other Woody Plant Materials NATIONAL ARBORIST ASSOCIATION STANDARDS: Pruning, Cabling and Bracing, Fertilization GUIDE FOR PLANT APPRAISAL-8TH EDITION: Authored by the Council of Tree and Landscape Appraisers; published by the International Society of Arboriculture PART 2: PRODUCTS -Not applicable PART 3: EXECUTION 3.1 3.2 CONSTRUCTION REQUIREMENTS: This section provides standards and guidelines for the retention and protection of trees and high-value shrubs for any proposed public works or construction project. DEMOLITION OF EXISTING CONCRETE: Caution should be used during removal of existing street, curb, gutter, sidewalk, drain inlets, and other concrete and asphalt demolition, to minimize injury to tree root systems. The following procedures should be used when removing existing concrete. A. B. c. D. E. Breaking of the existing concrete and asphalt for removal should be done in a manner that will minimize ground disturbance and vibration. Curbs and sidewalks within designated tree protection areas and critical root zones shall be removed by hand. When removing existing sidewalks and curbs, care should be taken to avoid injury to roots located under, over, or adjacent to paved surfaces. Roots and root-trunk flares growing over curbs should not be injured during breaking of curbs and removal of debris. Wood and bark tissues shall not be injured by striking tissues with equipment. During the removal of concrete, all root systems and soil areas exposed shall not be disturbed. Motorized equipment and trailers, including tractors, Bobcats, bulldozers, trackhoes, trucks, cars, and carts are to be limited to access on the existing paved street only. Access is not allowed behind the curb within tree protection areas. Contract No. XX DPR Standard Specifications 02150-3 Rev 3/28/03 3.3 F. Should access be necessary within designated tree protection areas, the existing grade shall be covered with double, overlapping sheets of% inch thick plywood, or six (6) to eight (8) inches of wood mulch to help distribute the weight of equipment and to minimize soil compaction and rutting. Plywood and/or mulch is not acceptable bridging material for driving over exposed tree roots. Exposed tree roots shall not be driven over. The City Forester or Project Consulting Arborist shall be notified and shall approve of the access and driving surface prior to its use. CONSTRUCTION OF SIDEWALKS, CURBS, CONCRETE, ASPHALT PAVING AND DRAINAGE INLETS: The following procedures shall be used when constructing sidewalks, curbs, concrete, asphalt paving, and drainage inlets. A. Keep all materials and equipment within the street bounded by existing curbs. B. Protect exposed roots from contamination by stabilization materials and concrete. C. Locate concrete washout areas away from roots and tree protection areas. D. E. F. G. H. I. J. When excavating for the construction of inlets, excavated soil shall be deposited in trucks and hauled off or deposited temporarily on % inch thick plywood outside the critical root zone. Excavated and fill soil shall not be deposited, even temporarily, on unprotected natural grade. After proper pruning, as needed, cover exposed roots within thirty (30) minutes to minimize desiccation. Roots may be covered with soil, mulch, or moistened burlap (7 ounce or equivalent), and shall be kept moist during the period until the final grade is established. Where possible, sidewalks should be raised, narrowed, curbed, or relocated to prevent cutting and removing major roots (e.g. roots greater than three inches in diameter). Place a sheet of six (6) mil or thicker plastic over the grade within affected portions of tree protection areas prior to pouring concrete sidewalks, curbs, inlets, ramps, and driveway approaches. The plastic will assist in providing a non-leaching barrier between the concrete, soil and roots. Construct new sidewalks on, or above, the existing grade instead of excavating into root zones. The new grade shall not interfere with sheet-flow drainage. Limit grading to a maximum of two (2) inches of fill over natural grade within critical root zones. Fill should consist of sandy loam topsoil. Clay soils shall not be used as fill. When using fill soil, the existing surface to receive fill should be scarified prior to filling. Any filling operation should not occur during water saturated soil conditions. Existing soil may be used as a form for back of curb and gutter, with or without the use of a thin masonite-type form, although a masonite form is preferred. This will minimize excavation in the critical root zone and prevent undue injury to the roots. This method is unnecessary in areas outside the critical root zone. Place a layer of Typar BioBarrier Contract No. XX DPR Standard Specifications 02150-4 Rev 3/28/03 [ [ [ [ [ w I [ [ [ [ [ [ [ [ D D D 0 0 I 0 0 I I 0 c D 0 K. L. between the curb and tree roots to help inhibit root growth that may exploit small cracks in the curb. Where appropriate, use curbs with discontinuous footings to maintain natural grade near the base of trees adjacent to the curbing, and to minimize injury to roots and root flares. Provide for easy concrete removal and replacement where an obvious raised root may cause sidewalk cracking in the future. This can be accomplished by installing an expansion joint on either side of the root or by etching the concrete on either side of the root to allow that particular section to be broken out and replaced. Compaction rating for the replacement walkway should not exceed 80% Proctor density. Tree roots will continue to slowly add girth every year; therefore, the base material needs to be malleable (e.g. suitable subgrade aggregates, crushed granite, or compacted sand) to prevent a fulcrum or pressure point which can crack or heave the walkway. Where appropriate, and under the direction of the City Forester or Project Consulting Arborist, root restricting barriers can be installed with a minimal amount of disturbance. There are several promising landscape related materials used as barriers to root growth, especially away from sidewalks, curbs and streets. Three such materials are: 1. 2. 3. a stiff nylon woven fabric (Q899 nylon fabric with extra firm finish from Jason Mills, Westwood, NJ); 14-mesh or smaller copper wire screen; and Typar BioBarrier (REEMAY, Inc., Old Hickory, TN). The nylon fabric has holes approximately 1126th-inch square separated by strands approximately 1126th-inch thick, with strands fused together. Copper screen has been shown to be effective in controlling seedling root growth. Typar BioBarrier is a commercial product developed specifically to control roots of trees, and consists of a felt-like spun-bounded polypropylene fabric to which polyethylene pellets are attached at one and a half (1 Yi) by one and a half (1 Yi) inch spacing. The pellets are impregnated with the herbicide Trifluralin and release it slowly over time (many years). After a two (2) foot deep, narrow trench is dug adjacent to the curb, sidewalk, or other structure involved, and after any affected roots are properly pruned, the material of choice should be placed against the side of the wall closest to the roots that were severed (side of the wall farthest from the structure being protected). Note: This procedure should not be used if large, existing roots (four (4) inches or larger in diameter) will be severed. The nylon fabric and copper screen will constrict roots to the size of the openings in the material; beyond the constrictions, roots will be greatly stunted except for knobs that form against the barriers. The barrier should be installed at least eighteen (18) to twenty-four (24) inches deep (in a vertical plane). M. In areas where roots have to be removed for construction of drain inlets, roots shall be severed prior to excavation to eliminate unnecessary tearing of roots by equipment. 1. Excavate soil by hand at the construction cut limit to a depth of thirty (30) inches or to the depth of the required root cut, whichever is less. 2. Prune roots as specified in Part 3, 3.1, D ofthis section. 3. Protect exposed roots as specified in Part 3, 3.1, B.5 of this section. N. Concrete or chemicals spilled within tree protection areas should be completely removed. Contamination soil shall be completely removed at the time of the spill and Contract No. XX DPR Standard Specifications 02150-5 Rev 3/28/03 removed by hand without disturbance to root systems. Appropriate soil should be added as necessary to restore the grade. 3.4 IRRIGATION OR UTILITY INSTALLATION: A. B. c. D. E. F. Contract No. XX PROTECTION OF TREES AND HIGH-VALUE SHRUBS: Contractor shall protect all trees and high-value shrubs from injury due to irrigation related work. All injuries to trees and high-value shrubs shall be mitigated to the satisfaction of the Owner, and, if appropriate in accordance with guidelines established in the "Guide for Plant Appraisal". All costs of such mitigating shall be charged to and paid by the Contractor. See Paragraph 3.9 of this section for definition ofhigh value. 1. All irrigation lines shall be indicated on construction plans and pre-approved by the City Forester or Project Consulting Arborist. Unless absolutely necessary, no irrigation lines shall be located within 10 feet of any existing tree trunk. (See following paragraphs). EXISTING TREES: The City Forester or Project Consulting Arborist shall be notified prior to any trenching or excavation known or suspected to involve cutting of more than: 1. 2. two roots, three inches or more in diameter; and/or four roots between two (2) and three (3) inches in diameter. The City Forester or Project Consulting Arborist shall be notified immediately in the event that roots in excess of that described above are cut, tom, ripped, or otherwise injured. All trenching or other work under the dripline of any tree shall be done by hand or by other methods which will prevent breakage or other injury to branches and roots. Where it is necessary to excavate within the critical root zone of existing trees, contractor shall use all possible care to avoid injury to trees and tree roots. Excavation, in areas where two (2) inch diameter and larger roots occur, shall be done by hand with approved hand tools. Where possible, tree roots two (2) inches or larger in diameter shall be tunneled or bored under and shall be covered with moistened burlap to prevent excessive drying. Wherever a trenching machine exposes roots smaller than two (2) inches in diameter, such roots extending through the trench wall shall be hand pruned (see Paragraph 3.5 of this section). All trenches within critical root zones shall be closed within twelve (12) hours-if this is not possible, the trench walls shall be covered with burlap and kept moistened. Prior to backfilling, Contractor shall contact the City Forester or Project Consulting Arborist to inspect the condition and treatment of roots larger than two (2) inches in diameter injured by trenching. Horizontal directional boring (auger tunneling), rather than open trenching, should be used for irrigation line or other utility installation within one half (lh) foot linear distance from the trunk base for every inch of trunk diameter, if root disruption or utility installation occurs on no more than one side of the tree. If trenching or utility installation will occur on two or more sides of a tree trunk (e.g. N,S,E, or W), then horizontal directional boring should be used if line installation is within one (1) foot DPR Standard Specifications 02150-6 Rev 3/28/03 [ [ [ [ [ I [ [ ' [ [ [ l [ [ D Q 0 0 i I I 0 I I 0 c n L 0 D 0 I linear distance from the trunk base for every inch of trunk diameter. 3.5 ROOT PRUNING: A. B. c. D. Contract No. XX Tree roots shall not be pruned or cut unless their removal is unavoidable or absolutely necessary. The City Forester or Project Consulting Arborist shall be notified prior to any operation known or suspected to involve cutting of more than: 1. two roots, three (3) inches or more in diameter; and/or 2. four (4) roots between two (2) and three (3) inches in diameter. The City Forester or Project Consulting Arborist shall be notified immediately in the event that roots in excess of that described above are cut, tom, ripped, or otherwise injured. Upon approval by the City Forester, prior to any excavation, removal of sidewalk, or other activity that will result in removal of soil and tree roots, all tree roots within a designated area will be pruned to a depth of fourteen (14) inches. Pruning shall occur with a Dosko Root Pruner, or equivalent, in accessible areas, and by hand in areas inaccessible to the root pruning machine. All other root pruning shall be done by hand with approved tools. Removal of roots greater than one (1) inch diameter or parts ofroots that are injured or diseased should be performed as follows: 1. 2. 3. Preserve the root bark ridge (similar in structure and function to a branch bark ridge). Directional root pruning is the recommendation technique and should be used during hand excavation around tree roots. Roots are similar to branches in their response to pruning practices. With directional root pruning, objectionable and severely injured roots are properly cut to a lateral root, if possible, that is growing downward or in a favorable direction. All roots needing to be pruned or removed shall be cut cleanly with sharp hand tools, with oversight by the City Forester or Project Consulting Arborist. No wound dressings shall be used. Recommended root pruning tools: a. Scissor-type lopper. b. Scissor-type pruner. c. Large and small hand saws. d. Wound scriber. e. Trowel or small shovel. f. Garden Fork. g. Hand broom. ROOT PRUNING NEAR SIDEWALKS 1. Root pruning should be done carefully, by hand, to achieve the objective of reducing future sidewalk problems as well as preserving the trees. Removing anchoring roots or causing injuries in anchoring roots and root flares can cause future decay and windthrow hazards. Indiscriminate cutting of vigorous roots results in their resprouting so that several more new roots may grow from the cut DPR Standard Specifications 02150-7 Rev 3/28/03 3.6 E. F. end, back under the sidewalk, thereby reducing the time between sidewalk repairs. Roots can be managed in the ground without significant harm to trees, if care is taken to avoid injuries that lead to root and trunk decay. 2. Directional root pruning is recommended because it considers the tree's response to root pruning and decay. With directional root pruning, roots are cut to a large lateral, if possible, that is growing downward or in a more favorable direction. The pruned root ends will be less likely to resprout, since a large lateral can assume the new terminal role of the root. 3. Proper removal of selected roots or parts of roots can direct roots away from sidewalks in the future. Procedures for root pruning directly next to sidewalks are as follows: 4. Hand dig a trench six (6) to eight (8) inches in depth at the edge of the planting strip and sidewalk. 5. Remove all roots less than two (2) inches diameter in this trench back to a desirable lateral root, preserving the root bark ridge. If careful ·excavation does not reveal a desirable lateral root within twelve (12) inches of the exposed root in question, then the exposed root shall be pruned properly so that a minimal amount of root is removed. 6. . Small root bundles, the source of future sidewalk problems, should also be removed at this time. All roots between two (2) and four ( 4) inches in diameter should be examined by the City Forester or Project Consulting Arborist in terms of their role in anchoring the tree. 1. All roots that contribute significantly to anchorage should be preserved. Remove all other roots in this size range to sound, downward growing lateral roots that are at least one half(~) the size of the root being removed. 2. All roots larger than four (4) inches in diameter are to be preserved unless their removal is absolutely necessary. Preservation oflarge roots may require: a. reducing the sidewalk width near the root flare; and/or b. ramping or bridging the sidewalk over the roots to allow for root growth. Tree guying subsequent to root pruning: Upon review of on-site root pruning and constructing grading limits, the City Forester or Project Consulting Arborist shall determine if existing trees subject to root pruning should be guyed or otherwise stabilized. Contractor shall retain a qualified tree service company to complete tree guying and stabilization in accordance with National Arborist Association standards as referenced in Section 5.00. Tree service company shall be licensed by the City and County of Denver, through the City Forester's Office. TREE PROTECTION FENCING: A. Tree protection fencing should be installed two (2) feet behind the existing curb in areas where the street surface will be removed and replaced. Tree protection areas shall be designated on construction documents, and fencing locations should be staked for approval by the Construction Manager and City Forester or Project Consulting Arborist. B. Tree protection fences should be constructed of one of the following: Contract No. XX DPR Standard Specifications 02150-8 Rev 3/28/03 [ [ [ [ [ I I [ [ I I [ [ [ [ [ [ 0 0 0 D 0 i I I ! I I 0 D 0 u D D 3.7 3.8 3.9 c. 1. 2. Galvanized chain-link -six (6) feet in height. Posts should be installed on ten (10) foot centers (maximum), at a depth of three (3) feet minimum. Installation of post shall not result in injury to surface roots or root flares of trees. Colored (orange), molded plastic construction fencing-four (4) feet in height. Fencing should be installed to completely surround the limits of tree protection areas, and should extend at least ten (10) feet beyond the designated construction limits. D. Tree protection fencing shall be installed prior to any site activity and shall remain until its removal is authorized by the City Forester or Project Consulting Arborist. TREE PROTECTION SIGNAGE: A standard Denver Forestry Tree Protection sign shall be mounted on tree protection fencing at fifty (50) foot intervals warning constructing personnel and the public to keep out of the tree protection areas. Signs may be picked up at Denver Forestry Office. PROJECT SITE MONITORING: As determined by the City Forester for projects of sufficient size to warrant such, a Project Consulting Arborist shall be retained to enforce and monitor the Tree Retention and Protection objectives. The project site should be monitored a minimum of two (2) times weekly-more frequently at the start of the project until all procedures and specifications are understood and properly executed by all parties. Specific monitoring schedules should be developed at preconstruction meetings and modified as deemed necessary by the appropriate parties. Schedules shall be relayed to the City Forester along with reports of site visits. INJURIES TO EXISTING PLANTS-DAMAGE PENALTIES: A. B. c. D. TREE AND HIGH-VALUE SHRUB APPRAISAL: All trees and high-value shrubs will evaluated and appraised by the City Forester or Project Consulting Arborist, and a list of all tree values for the project will be on file in the Construction Manager's office. Any tree or other plant requiring retention or protection that is not on the list shall be appraised by the City Forester or Project Consulting Arborist as necessary to comply with this damage penalty. Documentation for appraisals will consist of : 1. measurement of plant size; 2. identification by common and botanical names; 3. current condition (overall health, injuries, overt hazard status, etc.) and 4. location factors as described in the "Guide for Plant Appraisal". Photographs may be taken of certain trees and shrubs to document debilitating condition factors. The threshold level for plants to be appraised shall be $100.00; only those trees and shrubs estimated to have a monetary value greater than $100.00 shall be appraised. Trees and other plants designated as requiring retention or protection shall be identified and located on construction plans. Loss of, or partial injury to, any of these plants due to Contractor neglect or improper construction activities will result in a penalty of up to treble damages of the assessed value of the tree as determined by the City Forester or Contract No. XX DPR Standard Specifications 02150-9 Rev 3/28/03 3.10 E. F. Project Consulting Arborist as described in Chapter 57 of Denver Revised Municipal Code. Trees determined as requmng "general protection" or "special protection" in the construction areas and in other key locations should be clearly identified by the City Forester or Project Consulting Arborist. Loss or partial injury to any of these trees due to Contractor neglect or improper construction activities will result in a penalty of up to treble damages for the assessed value of the trees as determined by the City Forester or Project Consulting Arborist as described in Chapter 57 of Denver Revised Municipal Code. Injury to a portion of these trees will be assessed by the City Forester or Project Consulting Arborist and a corresponding portion of the liquidated damages will be assessed to the Contractor. A fine of one-thousand dollars ($1,000.00) will be levied against the Contractor for each incident of construction damage (including construction traffic) within designated tree protection areas. Any fine shall be independent of any applicable damages for the assessed value of the tree or tree part. G. Trees or roots visibly and unnecessarily injured will cause the Owner to withhold from the Contractor an assessed amount conforming to the requirements stipulated above, for a period of one full year. After that period the impact of the injury to any tree will be assessed by the City Forester or the Project Consulting Arborist. SUBMITTALS: A. B. Proposed methods and schedule for effectuating tree and other plant protection shall be submitted for approval. Contractor shall submit construction schedule which includes a time frame for work near existing plants. Approval of such shall be obtained from the City Forester prior to commencement of construction near tree protection areas. Proposed methods, materials, and schedule for root pruning, branch pruning, and other tree maintenance shall be submitted for approval. The City Forester or Project Consulting Arborist shall mark the location of root pruning lines in the field prior to the operation. If possible, root pruning should occur between autumnal leaf fall and spring foliation. Root pruning during the growing season shall require approval of the City Forester or Project Consulting Arborist. 3.11 TREE AND OTHER PLANT MAINTENANCE DURING AND AFTER COMPLETION OF CONSTRUCTION. A. Proper maintenance should include, but without limitation to: structural and remedial pruning; watering; mulching; remediating soil compaction; fertilization; insect and disease control; soil and tissue analysis; aeration; and wound treatment. B. The timing duration and frequency of necessary maintenance practices should be determined by the City Forester or Project Consulting Arborist, based on factors associated with the site and affected plants. END OF SECTION 02150 Contract No. XX DPR Standard Specifications 02150-10 Rev 3/28/03 [ [ [ [ [ I I [ I I I [ [ [ [ [ [ Page 1 APPENDIX C. PREFERRED PLANTING LIST Hardiness Ratings: 1. Good Water: M - Moist Sun: - Full Sun 2. Acceptable A - Adaptable - Partial Shade 3. May be tolerant D - Dry - Shade X - Xeri A - Adaptable TREES - CONIFERS Botanical Name Common Name Hardiness Water Sun Spread/Ht. Comments Abies concolor Concolor fir (white) 1 M/A 20'/30' Juniperus scopulorum Common Juniper (upright) 1 X 12'/30' Native Juniperus virginiana A Picea pungens Colorado Blue Spruce 1 A 30'/60' Native Pinus aristata Bristlecone Pine 1 X 20'/40' Native, aka Foxtail Pine Pinus contorta latifolia Lodgepole Pine 1 A 30'/70' Native Pinus edulis Pinyon Pine 2 X 20'/30' Pinus flexilis Limber Pine 1 X 30'/50' Native Pinus mugo Mugo Pine 1 A/D 20'/20' Pinus nigra Austrian Pine 2 A/D 40'/60' Page 2 Pinus ponderosa Ponderosa Pine 1 X 40'/80' Native Pseudotsuga menziesii Douglas Fir 1 A 25'/80' Native TREES - DECIDUOUS Botanical Name Common Name Hardiness Water Sun Spread/Ht. Comments Acer ginnala Amur Maple 2 A 20'/20' Acer negundo Box Elder 2 A 50'/50' Acer tataricum Tatarian Maple 2 A A 20'/25' Aesculus glabra Ohio Buckeye 2 A 30'/40' Alnus tenuifolia Mountain Alder 1 A 20'/30' Native, aka Thinleaf Alder Betula fontinaus Western Red Birch 1 M/A 25'/35' Native Betula occidentalis Western River Birch 1 M 10'/15' Native, aka Rocky Mtn. Birch Betula pendula lacinata Cutleaf Weeping Birch 3 M/A Crataegus mordenensis Toba Hawthorne 2 A 20'/20' Fraxinus pennsylvanica Green Ash 3 A/D 40'/50' Patmore & Marshall Seedless Malus "Dolgo" Dolgo Crab 2 A 30'/30' Malus "Hopa" Hopa Crab 2 A 25'/25' Page 3 Malus "Radiant" Radiant Crab 2 A 20'/25' Malus "Royalty" Royal Crab 2 A 15'/15' Populus acuminata Lance Leaf Cottonwood 1 A 40'/60' Populus alba White Poplar (silver) 2 A Populus angustifolia Narrow Leaf Cottonwood 1 A 30'/50' Native Populus sargentii Common Cottonwood 1 A 60'/80' Populus tremuloides Aspen 1 M/A 30'/50' Native Prunus virginiana "Shubert" Shubert Choke Cherry 1 A 25'/30' aka Canada Red Pyrus calleryanan "Redspire" Redspire Pear 1 A 20'/35' Quercus gambelii Gambel Oak 2 D 12'/20' Native Quercus macrocarpa Bur Oak 2 A/D 80'/80' Sorbus aucuparia Mountain Ash, European 2 A 25'/30' Ulmus pumila Siberian Elm 2 SHRUBS - CONIFER Botanical Name Common Name Hardiness Water Sun Spread/Ht. Comments Page 4 Juniperus chinensis "Pfitzeriana" Pfitzer Juniper 1 A/D 10'/12' Juniperus chinensis "Old Gold" Old Gold Juniper 1 A/D 4'/4' Juniperus chinensis "Compact" Compact Pfitzer 1 A/D 6'/4' Juniperus chinensis "Sea Green" Sea Green Juniper 1 A/D 8'/6' Juniperus chinensis "Prostrata" Prostrate Juniper 2 A/D Juniperus horizontalis "Bar Harbor" Bar Harbor Juniper 2 A 8'/1' Juniperus horz. "Prince of Wales" Prince of Wales Juniper 1 A/D 10'/8" Juniperus horizontalis Wiltonii Wilton Juniper 1 A/D 8'/6" Juniperus Weberii Weber Juniper 1 A/D Juniperus sabina "Broadmore" Broadmore Juniper 1 A/D 8'/18" Juniperus sabina "Buffalo" Buffalo Juniper 1 A/D 8'/18" Juniperus sabina "Calgary Carpet" Calgary Carpet Juniper 1 A/D 8'/18" Juniperus sabina "Scandia" Scandia Juniper 1 A/D 6'/2' Juniperus sabina "Tamoriscifolia" Tammy Juniper 1 A/D 8'/6" Juniperus scopulorum Table Top Blue Juniper 1 A/D 8'/5' SHRUBS - DECIDUOUS Page 5 Botanical Name Common Name Hardiness Water Sun Spread/Ht. Comments Acer ginnala "compacta" Dwarf Amur Maple 2 A 8'/8' Good fall color Acer glabrum Rocky Mt. Maple 1 D 15'/29' Native Amelanchier alnifolia Saskatoon Service Berry 1 A/D 12'/12' Native, nice fall color, yellow, orange Amelanchier canadensis Shadblow Service Berry 1 A 20'/25' Berberis mentorensis Mentor Barberry 2 A 7'/7' Berberis thunbergii atropurpurea Redleaf Barberry 3 A 6'/6' Berberis thunbergii "Rosy Glow" Rosy Glow Barberry 3 A 4'/4' Caragana arborescens Siberian Peashrub 1 D 12'/15' Cercocarpus intricatus Little Leaf Mt. Mahogany 1 D 4'/4' Cercocarpus ledifolius Curlleaf Mt. Mahogany 1 D 20'/25' Cercocarpus montanus Mountain Mahogany 1 D 6'/6' Native Cornus stolonifera Red-Osier Dogwood 2 M/A A 3'/3' Native Cotoneaster acutifolia Peking Cotoneaster 1 D 6'/3' Cotoneaster apiculatus Cranberry Cotoneaster 2 A 6'/2' Page 6 Euonymus alata compacta Dwarf Burning Bush 2 A 6'/6' Lonicera tartarica zambellii Zambelli Honeysuckle 1 A/D 12'/12' Pachistima myrsinites Mountain Lover 3 A 2'/2' Native Potentilla abbotswood Abbotswood Potentilla 1 A 3'/3' Potentilla fruticosa Native Potentilla 1 A 3'/3' Native Potentilla "Gold drop" Gold Drop Potentilla 1 A 3'/3' Potentilla "Jackmanni" Jackman Potentilla 1 A 4'/4' Potentilla "Kathryn Dykes" Kathryn Dykes Potentilla 1 A 4'/3' Potentilla "Mt. Everest" Mt. Everest Potentilla 1 A Prunus besseyi Sand Cherry 1 A/D 6'/6' Prunus cistena Purple Leaf Plum 1 A 6'/8' Prunus tomentosa Nanking Cherry 1 A 12'/10' Rhus glabra Smooth Sumac 1 A/D 10'/15' Rhus glabra cis montana Rocky Mt. Sumac 1 A/D 6'/6' Rhus trilobata Three-leaf Sumac 1 D 6'/6' Native Rhus typhina Staghorn Sumac 2 A 15'/25' Nice fall color, Yellow, orange, red Page 7 Ribes alpinum Alpine Current 1 A 6'/6' Ribes aureum Golden Current 1 A/D 6'/6' Ribes cereum Squaw Current 1 D 4'/4' Native Robina neomexicana New Mexican Locust 2 D 12'/20' Rosa foetida bi-color Austrian Copper Rose 1 A/D 8'/10' Rosa rugosa Red Shrub Rose 1 A/D 6'/4' Rubus deliciosus Thimbleberry 1 A A 6'/6' Native Salix purpurea nana Dwarf Arctic Willow 1 M/A 5'/5' Salix purpurea pendula Blue Fountain Willo 1 M/A 12'/8' Sambucus canadensis aurea Golden Elderberry 2 M/A 12'/12' Sambucus pubens Red Elderberry 1 M/A 12'/12' Sheperdia argentea Silver Buffaloberry 1 D 12'/15' Spirea bumalda Anthony Waterer Anthony Waterer Spirea 2 A 4'/3' Spirea bumalda froebeli Froebel Spirea 3 A 4'/4' Spirea nipponica Snowmound Spirea 2 A 5'/5' Spirea vanhouttei Vanhoutte Spirea 2 A 8'/6' Symphoricarpos Hancock 2 A/D 6'/3' Page 8 chenaulti Coralberry Symphoricarpos oreophilus Mt. Snowberry 1 A 4'/4' Native Syringia vulgaris Common Lilac 1 A/D 12'/20' Syringia vulgaris "Lavender Lady" French Lilac 1 A/D 10'/12' FLOWERS - PERENNIALS Botanical Name Common Name Hardines s Wate r Su n Spread/Ht . Flower Color Bloom Time Nativ e Achillea filipendulina Yarrow, tall yellow 1 X 2'/5' yellow summer Achillea lanulosa Yarrow, native 1 X 3'/2' white, rarely pink summer X Achillea millefolium Yarrow, common white 1 X 3'/2' white summer Alcea rosea Hollyhocks 1 D/A 3'/6' various early summer -fall Alyssum montanum Basket of Gold 1 A 18"/12" mustard yellow mid spring Aquilegia caerulea Rocky Mtn. Columbine 1 A 18"/24" blue w/white center spring- summer X Aquilegia x "Mckana" Mckana's Columbine 1 A A 18"/24" various spring- summer Page 9 Astilbe False Spirea 2 A 2'/2' white late spring Athyrium filix- femina Lady Fern 1 M 15"/36" X Campanula calycanthema Cup and Saucer 2 A 1'/2' various summer Campanula rotundiflora Harebell 1 D 18"/18" blue late spring- summer X Cerastium fontanum Mouse Ear 1 A 10"/10" white spring- summer X Chrysanthemu m coccineum Pyrethrum/Painte d Daisy 1 A 18"/24" various late spring- summer Chrysanthemu m maximum Shasta Daisy 1 A 2'/3' white summer Convallaria majalis Lily of the Valley 1 M 15"/12" white late spring Coreopsis grandiflora Double Coreopsis 1 A 15"/15" yellow mid summer Coreopsis lanceolata Lance-leaf Coreopsis 1 A 2'/2' yellow early- mid summer Coreopsis tinctoria Plains Coreopsis 1 A 15"/15" yellow w/red center mid summer Delphinium elatum Larkspur 1 A 3'/5' various summer Dianthus Dianthus 1 A 12"/12" various mid Page 10 summer Dianthus barbatus Sweet William 1 A 1'/2' various spring- summer Dicentra "Luxuriant" Fringed Bleeding Heart 1 A 18"/18" dark pink late spring- early sum. Dicentra spectabillis Old Bleeding Heart 1 A 2'/3' pink late spring- early sum. Digitalis grandiflora Foxglove 1 M/A 18"/30" yellow, pink, white late spring- early sum. Doronicum cordatum Leopard's Bane 2 M 18"/24" yellow spring Echinacea purpurea Purple Coneflower 1 A/D 2'/3' lavender- purple mid-late summer Erigeron speciosus Fleabane 1 A 2'/2' white summer X Gaillardia aristata Native Blanketflower 1 X 2'/2' yellow w/red center X Gaillardia grandiflora Blanketflower 1 X 2'/3' yellow w/red center summer Gaillardia grandiflora "Goblin" Goblin Blanketflower 1 D/A 18"/18" red w/yellow center mid summer Gentiana Crested Gentian 1 M/A 1'/1' dark blue late Page 11 septemfida spring Hemerocallis Day Lilies 1 D 3'/3' orange, yellow mid summer Hosta "Royal Standard" Plantain Lily, Royal Standard 1 A 2'/2' white late summer Hosta sieboldiana "Elegans" Plantain Lily, Blue Giant 1 A 3'/3' white- lavender late summer Hosta undulata "Variegata" Plantain Lily, white rimmed 1 A 18"/24" pale lavender mid summer Iberis sempervirens Candytuft 1 A 2'/1' white late spring- early sum. Iris kaempferi Japanese Iris, purple 2 M 18"/36" purple early- mid summer Kniphofia uvaria Red-Hot-Poker 1 D 2'/3' orange/yello w mid-late summer Liatris spicata Gayfeather 1 A/D 18"/24" lavender- purple mid-late summer Linum perenne Blue Flax 1 X 18"/24" blue late spring- mid sum. Lupinus polyphyllus Lupine 1 A 2'/3' various spring- summer Lychnis chalcedonica Maltese Cross 1 A 18"/36" scarlet mid summer Page 12 Matteuccia Ostrich Fern 1 M 2'/3' Myosotis scorpioides Forget-Me-Not 2 M 18"/8" blue, white, rose spring Nierembergia hippomanica Nierembergia 2 A A 12"/5" white summer Papaver nudicaule Iceland Poppy 1 A 18"/24" various summer -fall Papaver orientalis Oriental Poppy 1 A 2'/3' various spring- summer Penstemon digitalis Husker Red Penstemon 1 A 2'/3' pale pink spring- summer Phlox paniculata Garden Phlox 1 A 2'/3' various mid-late summer Physostegia virginiana Obedient Plant 1 A 2'/3' white late summer -fall Polemonium caeruleum Jacob's Ladder 2 A 18"/24" blue late spring- summer Prunella grandiflora Self Heal 1 A 1'/1' lavender summer Ratibida columnifera Mexican Hat 1 A 2'/3' golden summer X Rudbeckia fulgida Black-Eyed Susan 1 A/D 2'/2' yellow w/green eye summer Rudbeckia hirta Black-Eyed Susan 1 A/D 2'/3' yellow w/brown eye summer X Page 13 Salvia superba Blue Salvia 1 A 18"/24" blue summer Saponaria ocymoides Rock Soapwort 1 A 18"/12" pink late spring- summer Thermopsis divaricarpa Golden Banner 1 A 2'/3' golden spring X Tradescantia andersoniana Spiderwort 1 A 2'/2' magenta pink early summer Veronica spicata Speedwell 1 A 18"/18" various summer FLOWERS - ANNUAL Botanical Name Common Name Hardines s Wate r Su n Spread/Ht . Flower Color Bloom Time Nativ e Antirrhinum majus Snapdrago n 2 A 8"/12" various summer Begonia semperflorens Begonia 3 M 10"/10" various summer -fall Calendula oficinalis Pot Marigold 2 M 8"/8" yellow/orang e spring- fall Celosia plumosa Cockscomb 3 A 8"/10" various summer -fall Centaurea cyanus Bachelor's Button 1 A 1'/2' various summer Cosmos bipinnatis Cosmos 2 M 1'/3' various summer -fall Page 14 Dianthus Pinks 1 A 8"/8" various summer -fall Dyssodia tenuiloba Dahlberg Daisy 3 A A 8"/8" golden yellow late spring- summer Eschscholzia californica California Poppy 1 X 10"/10" yellow/orang e summer Gazaniarigens Treasure Flower 1 A 12"/18" various summer -fall Gerbera jamesonii African Daisy 1 A 1'/1' various summer Impatiens wallerana Impatiens 3 M 18"/18" various summer -fall Limonium Statice 2 A 12"/18" various summer Lobelia erinus Lobelia 1 M 8"/6" various summer Lobularia maritima Sweet Alyssum 1 A 8"/4" various summer -fall Matthiola incana Stock 2 A 12"/18" various spring- summer Nemesia strumosa Nemesia 2 A 8"/8" various spring- summer Nicotiana alata Flowering Tobacco 3 A 18"/30" various summer Pelargoniumhortoru m Geranium 2 A 15"/15" various summer Petunia x hybrida Petunia 1 A 20"/12" various summer Page 15 Phlox drummondii Annual Phlox 2 A 6"/10" various summer Portulaca grandiflora Rose Moss 1 D 8"/6" various summer Salvia splendens Annual Salvia 2 M 10"/10" various summer Santolina chamaecyparissus Lavender Cotton 1 X 15"/15" gold spring- summer Senecio cineraria Dusty Miller 1 A 9"/9" Silene armeria Catchfly 1 A 1'/2' rose-pink summer -fall Tagetes Marigold 2 A 12"/15" yellow/orang e summer Verbena hybrida Verbena 2 A 8"/8" various summer Viola kitaibeliana Johnny- Jump-Up 1 M 18"/12" various summer -fall Viola wittrockiana Pansy 1 M 8"/10" various spring- fall Zinnia elegans Zinnia 2 M 1'/2' various summer -fall GROUND COVERS Botanical Name Common Name Hardiness Water Sun Spread/Ht. Flower Color Bloom Time Native Aegopodium Snow on the 1 A 24"/12" white summer Page 16 podagraria Mountain Ajuga reptans Carpet bugle 1 A A 12'/6" blue late spring Arabis caucasica- Snowcap Alpine Rockcress 1 A 12"/9" white spring Arctostaphylos uva-ursi Kinnikinnick 1 X 36"/6" soft pink early spring X Arenaria verna- caespitosa Irish Moss 1 M 12"/2" white late spring Artemisia schmidtiana Silvermound Sage 1 X 24"/12" yellow late summer Cerastium tomentosum Snow in Summer 1 X 18"/12" white spring/summer Deplosperma cooperi Purple Iceplant 1 X 18"/4" violet purple summer/fall Delosperma nubigenum Yellow Hardy Iceplant 1 X 18"/2" yellow summer Fragaria Americana Wild Strawberry 1 A/D A 18"/6" white spring Galium odoratum Sweet Woodruff 1 A 12"/8" white late spring Mahonia repens Creeping Mahonia 1 X 18"/18 yellow spring/summer X Phlox subulata Creeping Phlox 1 A 18"/6" blue & white early spring Sedum acre Stonecrop 1 D 18"/4" yellow early summer Sedum spurium Dragon's 1 D 18"/4" rose red mid summer Page 17 Blood Sempervivum Hens and Chicks 1 D 18"/6" Thymus minus Dwarf Creeping Thyme 1 A A 12"/1" pink early summer Thymus pseudolanuginosis Wooly Thyme 1 D 18"/1" pink early summer Thymus serpyllum citroides Lemon Thyme 1 A 18"/1" purplish pink early summer Vinca minor Periwinkle 1 A A 18"/6" dark blue summer Waldsteinia ternata Barren Strawberry 1 A A 12"/12" yellow late spring BULBS Botanical Name Common Name Hardiness Water Sun Flower Color Bloom Time Chionodoxa luciliae Chionodoxa 1 A various spring Crocus Crocus 1 A purple & white early spring Hyacinthus orientalis Hyacinth 1 A blue spring Narcissus Daffodils 1 A various spring Tulipa Tulips 1 A various spring Page 18 VINES Botanical Name Common Name Hardiness Water Sun Comments Clematis x jackmanil Purple Clematis 2 A Euonymus fortunei Wintercreeper 1 A/D A Parthenocissus quinquefolia Virginia Creeper 1 A Quinquefolia englemanii Engleman Ivy 1 A GRASSES Botanical Name Common Name Hardiness Water Sun Comments Cortaderia selloana Pampas Grass 3 A Festuca ovina glauca Blue Fescue 1 A Miscanthus sinensis Miscanthus 1 A Phalaris arundinacea Ribbon Grass 1 A A Native Sisyrinchium montanum Blue Eyed Grass 2 A Native