Agenda - Council - 09/27/1994 - Laserfiche WebLink

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B. Pr4 ective Barriers. 1. Active protective tree fencing shall be installed along the outer edge of and completely{ surrounding the critical root zones of ail specimen trees or stands of trees, or otherwise ~esignated tree protective zones, prior to any b,u, ilding construction., 2. ~ These fences will be a minimum four (4) feet high. Four (4) feet orange polyethely~.e laminar safer>, fencing is preferred. Twine or safety ribbon alone are not allowed. ~ 3. ~ Passive fora-ts of tree protection may be utilized to delineate tree save areas which are _i'emote from areas of land disturbance. These areas must be completely surrounded ~vith continuous rope or flagging (heavy mil - minimum four 14"] inches wide).. All passive _tree protection must be accompanied by "Keep Out" or "Tree Save" signage 4. ! All tree protection zones should be designated as such with "Tree Save Area" signs}posted visibly on all sides of the fenced area. These signs are intended to inform subOontractors of the tree protection process. Signs requesting subcontractor cooperation~iand compliance with tree protection standards may be required for site entrances. : 5. ~ All tree fencing barriers must be installed prior to and maintained throughout building con[;truction and should not be removed until completion of construction and until all landscaping is installed. C. Encroachment. Most trees can tolerate only a small percentage of critical root zone loss. If encroachment is anticipated within the critical root zones of specimen trees, stands of trees, or o{~herwise designated tree protective zones, the following preventive measures shall be employed: 1. ~ Clearing Activities: Roots often fuse and tangle amongst trees. The removal of tr{:es adjacent to tree save areas can cause inadvertent damage to the protected trees. Wheretver possible, it is advisable to cut minimum two (2') foot trenches (e.g., with- a vibratory plow) along the limits of land disturbances, so as to cut, rather than tear, roots. Directional f~lling of trees outward from disturbance ai-eas and ~rinding stumps is also expected. : 2. ~ It is very strongly suggested that all clearing in oak stands be done before May 1 st and ~fter July 1 st of each season. This wilI decrease the inadvertent wounding of trees with the',consequential risk of oak wilt. However, if clearing has to be done at this time, all stum}s and wounded trees shall have nontoxic wound dressings applied. Should oak wilt disea~se become established as a result of the construction during the months of May and Jun~, then the developer/builder shall pay for all additional oak wilt control measures neeqled to control the disease resulting from the activity, including necessary control work ¢n adjoining property. 3. !Where the City Forester/Tree Inspector has determined that irreparable damage has o~curred to trees within tree protective zones, they must be removed and replaced by th~ developer/builder as defined in Section IV(B)9. D. Restoration and Reclamation of the Growing Site. A tree's ability for adequate root development, a~nd ultimately its chances for survival are improved with reclamation of the growing site. !Whenever possible, the soil shall be.brought back to its natural grade. Unnecessary fi~l, erosion sedimentation, concrete washout, and construction debris should be removed. ,When machinery is required for site improvement, it is strongly recommended ~hat a "bobcat" or similar light weight rubber tire vehicle be used so as to minimize soil c'.9mpaction. As part of the utilization and disposal plan, wood chips should be processed frdm removed trees or imported and placed around the tree protection zones.