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HomeMy WebLinkAboutMaster Permit.1015 Waters Ave.0204.2019 (49).ARBK MAINTENANCE BOND City of Aspen,Pitkin County,Colorado KNOW ALL MEN BY THESE PRESENT That we,the undersigned,as Gregg Hemming,Trustee of Evelyn F. I-lemmings Trust as Principal,hereinafter referred to as"Contractor"are held and firmly bound unto the City of Aspen, Colorado,as Obligee,in the penal sum of$6,500.00 Dollars for work to be performed as outlined on the attached Exhibit'A', 'B' and'C'and summarized as follows:Relocation of a spruce tree located at 1015 Waters Avenue,Aspen Colorado(the"Property") to a location north and east of the present location on the same property and as shown on Exhibit'A'. The Contractor will provide after care and maintenance of the tree in the new location for a period of three years from June 1,2019 to June 1,2022. After the three-year period,an assessment of the health of the spruce tree will be determined. If the tree has been found to be healthy,the $6,500.00 Dollars will be returned to Contractor.Additional details of the methods of relocation are described in Exhibit'B',and 'C'and attached to this Maintenance Bond agreement. A schedule of the work to be executed is attached as Exhibit'C'.The total value of the Maintenance Bond of$6,500.00 Dollars,lawful money of the United States of America,for the payment of which sum, well and truly to be made to the Obligee,we bind ourselves,and our heirs,executors,administrators,successors,and assignees, jointly and several,by these presents: WHEREAS, said Contractor has made or will make application to said Obligee for relocation of the aforementioned Spruce tree,for a term beginning April 15th and ending on May 31, 2019,for furnishing all equipment, labor, tools, and materials for the completion of work in accordance to the detailed plans and specifications attached hereto as Exhibit A,B and C to the satisfaction of the Parks Department, City of Aspen,Pitkin County Colorado. NOW THEREFORE, The conditions of the foregoing obligations are such that if said Contractor shall well and truly perform all the covenants and conditions for the said work to be performed, and maintain the relocated tree for a period of three years as provide herein,and protect and save harmless the City of Aspen,Colorado from all losses and damages to life or property suffered or sustained by any person, firm and or corporation, caused by said Contractor or its agents of its employees, in the performance of said work, or by, or in consequence of any negligence, carelessness, or misconduct in guarding and protecting same,or from any improper or defective equipment or materials used in the work,or other damages,then this obligation shall be void,otherwise it shall remain in full force and effect in law. This Bond is for a single project and guarantees that the material and equipment is furnished and used, and the workmanship employed in the performance of the work described will be of such character and quality as to insure it to be free from all defects and in continuous good order and in a condition satisfactory to the Governing Body of the City of Aspen for a period of three years from the date of the final Inspection Log indicating 100%satisfactory completion of work. The bond shall be non- cancelable for three full years from the date of issuance to June 1, 2022. 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J art U 4a - l Is. pm oi_6 J// 214 aid o-p_ -- f $ ; a 9 t a EXHIBIT'B' GRETCHEN GREENWOOD ARCHITECT,INC. 210 South Galena Street Suite 30 Aspen CO. 81611 0: 970-925-4502 E-mail:ggreenwood@ggaaspen.com • April 15,2019 Secure Site with Construction Fencing Begin Demo of garage • April 15-30 Obtain Parking permits for work in the right of way April 18—30 • April 18-30 Begin Abandonment of utilities in the transplant and receiver areas • May 1 Begin Preparing tree for Removal • May 1-Stake location of transplant location; get approval from project team and CoA • May 6-10 Remove permitted trees and remove stumps/root plates(likely a 2-3 day project but depends upon underground root systems • May 13 -16 Prepare receiver hole and install anchoring system for root ball(2-3 days) • May 17 Dig and move the tree, secure anchoring systems (1 day) • May 18 Provide after care per transplanting report • Maintenance plan as outlined in Tree Removal Plan for three-year period. EXHIBIT 'C' Spruce Transplanting 1015 Waters Avenue Aspen, Colorado Prepared By: Chris Forman ISA Certified Arborist#RM-2352AM ASPEN TREE SERVICE February26, 2019 Est.1982 1111 Village Road,Carbondale CO 816z o 6 0 0 9 3�97 )9 33 7 SUMMARY Gretchen Greenwood and Associates asked Aspen Tree Service to evaluate and prepare a plan to transplant a blue spruce(Picea pungens)located in the front yard of ioa5 Waters Avenue in Aspen,Colorado. The property is being redeveloped and a tree removal permit was required prior to work commencing. As part of the permit process, the Aspen Parks Department identified the spruce described in this report to be transplanted or otherwise protected in place. The new development layout requires the tree to be moved in order to comply with the permitting requirements. The new location for this tree was determined by the landscape architect. On February 21, 2019,we evaluated the tree and surrounding soils to determine the methodologies for transplanting. Based upon the soil conditions,the tree could likely be moved successfully either with a truck mounted tree spade or via hand digging and a crane. We have also defined the necessary actions to be taken before,during,and after the tree move. The tree will be relocated prior to June 1, 2019. The Aspen Parks Department requires a bond in the amount of $6,50o to be paid prior to moving the tree,which will be refunded in its entirety if the tree is in good health after 3 years in its new location. After care as described in the attached proposal will continue for a time period of 5 years following the transplanting effort. If for any reason there is a failure in the root ball or any other event that jeopardizes the success of the transplanting during operations,work will be halted and all interested parties will be notified of the situation. The bond money issued to the Parks Department will be forfeited and our charges will revert to time and materials up to that point in time on the project if the transplanting effort is aborted. INTRODUCTION BACKGROUND The property located at 1015 Waters Avenue in Aspen,Colorado is being redeveloped,requiring the removal of several trees on site. A tree removal permit issued by the City's Parks Department is required to remove trees on this site. In December 2o18,I began working with Gretchen Greenwood and Associates, Hendrickson Construction,the property owner,and the City of Aspen Parks Department to obtain a tree removal permit. Prior to my involvement in the project,a tree removal permit was submitted to the Parks Department,specifically identifying which trees are being requested for removal. The removal permit application was reviewed by the Parks Department and they ultimately denied the request for removals. The development team requested a meeting with Parks Department staff following the permit denial. On January 15,2019,the development team, representatives from the Parks Department,and I met on site to discuss options for moving forward with the project. While on site,the group determined that the project could move forward if a specific spruce was protected or relocated. The spruce defined for protection/relocation is a 13.5-inch diameter spruce located on the eastern half of the front yard. The tree has an aluminum tag with#83 stamped on it,located on the tree's trunk. After the aforementioned site meeting,the property owner chose to relocate the spruce in lieu of a redesign effort that would preserve the tree in its current location. 1 ASSIGNMENT Aspen Tree Service has been asked by the project team to provide the following services and deliverables: • Evaluate spruce#83 and adjacent soils for feasibility of transplanting • Transplant the tree and provide management of the operational efforts required o Create a report to submit to the City Parks Department to obtain a finalized tree removal permit • Provide aftercare services once the tree has been relocated in the landscape LIMITS OF THE ASSIGNMENT Because there are numerous trees and underground utilities adjacent to the spruce,we were unable to conduct soil sampling on all sides of the spruce. Therefore,our soil investigations are based solely on findings from test holes dug on the west side of the spruce. The presence of large underground boulders can sometimes prevent trees from being dug and transplanted. These types of boulders may or may not exist in the untested areas. PURPOSE & USE OF REPORT The purpose of this report is to provide information regarding the transplanting and aftercare of spruce#83. It is intended to be used by the project team as an informative reference for this project. It is intended to be used by the City Parks Department to provide the information required to issue a finalized tree removal permit for this project. OBSERVATIONS SITE DESCRIPTION The property is located at Boys Waters Avenue in Aspen,Colorado. The existing home is scheduled to be demolished and a new home to be built within the same general location on the site. There are several trees on this property,predominantly comprised of aspen(Populus tremuloides),spruce(Picea pungens),and narrowleaf cottonwood(Populus angustifolia). Trees requested for removal are located on the south,north,and east portions of the site. Spruce#83,the main focus of this report,is located in the north east portion of the property. The excavation necessary to build the new home will compromise this tree's critical root zone. The north west portion of the property provides adequate space to receive the spruce being transplanted. The new location for the tree will be staked out for approval by the Parks Department prior to digging the tree. Portions of the root ball may encroach upon the northern property boundary,depending upon the root ball size required for the transplant effort. The attached landscaping plan shows where the tree is to be relocated. TREE OBSERVATIONS The spruce tree(#83)identified in this report has a diameter of 13.5 inches at breast height(DBH)with a canopy spread averaging 20 feet. It is a mature specimen that has grown within a group of narrowleaf cottonwoods, aspen,and other spruce. The uppermost portion of its canopy has been most noticeably impacted on the south, southwest side of the tree. In this area of the canopy,some branches are missing or were damaged by the surrounding trees. The canopy spread varies in length on each side of the tree,also due to the proximity of surrounding trees. 2I TESTING AND ANALYSIS As part of my visual examination of the tree,I looked for any insect and/or disease indicators. Measurements were taken for tree size and canopy spread as well using a diameter tape and standard tape measure. There were no indicators of insect or disease problems in the tree at the time of inspection. In addition,we utilized a mini-excavator to dig test holes for soil evaluations. Underground utility locations were identified prior to onsite digging. Results of those locates found the water service line running through the proposed test dig area. Due to the water line,excavation was done east of the water line,adjacent to the codominant narrowleaf cottonwood growing near spruce#83. We found the soil to be of a coarse texture with abundant cobble stones measuring Ito 4 inches in diameter. DISCUSSION The project team,including the Aspen Parks Department has agreed to relocate spruce tree#83 in order to complete the tree removal permitting process. Based upon the tree's condition and the soil structure noted in the area tested,it appears that this tree could likely be relocated successfully. Transplanting operations shall occur no later than June 1, ao19. After June i,it is likely that the tree will have pushed new growth,resulting in a much higher likelihood of stress caused by transplanting. The spruce will be marked with a flag indicating its current cardinal orientation. The north side of the tree will be marked and the tree will be planted in the same cardinal orientation in its new location. It may be necessary to tie up some lower branches prior to moving the tree to help avoid injury to the tree. This will be done utilizing heavy twine or burlap strips. Tying material will remain in place until the tree is planted in its new location. Once that has occurred,the tying material will be removed before staking/guying systems are installed. Pruning any broken or dead branches will be done immediately following the tree move. No live branches are to be removed as part of this operation,unless they are damaged as part of the transplanting operation. The root ball of the transplant tree will be approximately 94 to 120"in diameter,though site constraints underground could change this desired measurement. Once the root ball is trimmed to property size and shape, it will be securely contained by wrapping in burlap. The burlap will be securely tightened with twine,wiring, wooden crate,or other means to ensure a solid,secure root ball. The lower i foot of tree trunk will be wrapped in burlap to protect it from any twine that may come into contact with the trunk from securing the root ball materials. The tree will be moved via crane into the receiver pit. If any unforeseen issues arise that force a root ball to be too small to accommodate a successful transplant,work will stop and alternative will be discussed. The receiver pit(new location of tree)will be dug and prepared prior to completion of final digging of the spruce. The final size of the transplant root ball will dictate the size of the receiver pit. This new pit will be thoroughly watered on the day of transplanting,prior to receiving the spruce. The excavated subsoil and topsoil shall be set aside in separate stockpiles for reuse in backfilling. If the subsoil is unsuitable,based upon the arborist's inspections,it will be discarded and replaced with appropriate subgrade and topsoil material. Once the tree is placed into the receiver pit,backfill will be added around the root ball. After the soil has been thoroughly firmed around the lower half of the ball,any burlap shall be cut away from the upper half of the ball and the remaining burlap adjusted to prevent the formation of air pockets. Soil will be firmed in 1-foot lifts and 31 thoroughly settled with water the same day of transplanting to within 6 inches of finish grade. Topsoil shall then be added up to final grade. An organic mulch layer will be created on top of the root ball to a depth of no more than 3 inches. Support staking/guying will be installed immediately following the above-mentioned steps. The exact type of system to be utilized must be developed once the tree has been transplanted. Many site factors play into deciding how to secure the tree. It could be a traditional staking and guying system such that aircraft cable is used with rubber hose bark protectors,attached to several metal stakes. Other systems could involve duck bill in ground anchors with similar cable systems attached. It could be an inground system anchoring the root ball itself if space requirements preclude any of the traditional cabling methodologies. The tree will receive adequate anchoring support systems immediately following the transplant,though exact system requirements must be determined during transplanting. The tree will receive supplemental watering immediately following transplant. The amount of water needed will be determined by the final root ball size. Supplemental watering will occur weekly following transplanting during the growing season,and continue for at least 3 years. Unless adequate water is provided to the tree via rain or snow during the months of June through October,water will be provided to the tree. Supplemental watering shall be applied to the root ball as well as the areas outside the root ball extending 2 feet outside the root ball. The tree should receive 5o gallons of water per week through the months of June,July,and August. The tree should receive the same amount every other week in September,October,and up to the point where the ground is frozen. Follow up care for this tree has been scheduled for the next 5 years. We will be visiting the tree 4 times per year to monitor for insect activity, disease indicators,moisture regime adequacy,and soil fertility needs. An arborist will define and implement treatments and moisture adjustments for any issues found during these visits. CO NCLUSS10NS Spruce tree#83 will be transplanted prior to June 1, 2019 via a large mechanical transplanter or hand digging and the use of a crane. A 5-year aftercare program has been developed to monitor this tree. The Aspen Parks Department has required a bond in the amount of$6,50o to be paid by the property owner. This bond amount will be refunded in full after City staff inspects the tree 3 years after transplanting and it is determined the tree is thriving in its new location. Once the bond requirement has been made and the Parks Department has approved this transplanting plan,it is anticipated that the final tree removal permit will be issued by the Parks Department. RECOMMENDATIONS I recommend moving forward with the transplanting of spruce tree#83 and the after care prescribed. I would also recommend the project team identifying a member of the team to carry out the irrigation regime throughout the construction process or until automated irrigation can be relied upon. Tree protection fencing shall be erected and maintained throughout the course of construction efforts. 41I'. 1 I ';\ "-s 64) ,i \I\ !gip_ - rrl 1 ra ' i O I 1 • rrl A- :•a ra F Q3 1 ..._` 1 NNf o a .1�. 0 _kc. V v o — ro L �, 0 /0 - , , , C' ill W > N m r1J zm� a1111 4 � o o o' �`¢ O W r.