06/27/2001 Env Bd Packet - Laserfiche WebLink

Home Search

TREE PRESERVATION POLICY 1. Active protective tree fencing shall be installed along the outer edge of and completely, surrounding the critical root zones of all specimen trees or stands of trees, or otherwise designated tree protective zones, prior to any land disturbance. 2. These fences will be a minimum four (4) feet high. Four feet orange polyethelyne laminar safety fencing is acceptable. (Figure 4.) 3. Passive forms of tree protection may be utilized to delineate tree save areas which are emote from areas of land disturbance. These areas must be completely surrounded with continuous rope or flagging (heavy mil - minimum 4" wide). All passive tree protection must be accompanied by "Keep Out" or "Tree Save" signage. (Figure 5.) 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 subcontractors of the tree protection process. Signs requesting subcontractor cooperation and compliance with tree protection standards are recommended for site entrances. 5. All tree fencing barriers must be installed prior to and maintained throughout land disturbance process and building construction, and should not be removed until landscaping is installed. 411 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 otherwise designated tree protective zones, the following preventive measures shall be employed: 1. Clearing activities: Roots often fuse and tangle amongst trees. The removal of trees adjacent to tree save areas can cause inadvertent damage to the protected trees. Wherever possible, it is advisable to cut minimum two (2) foot trenches (e.g. with a "ditch - witch") along the limits of land disturbances, so as to cut, rather than tear roots. Directionally felling trees outward into disturbance areas and grinding stumps is also acceptable. 2. It is very strongly suggested that all clearing in oak stands be done before May 1st and after July 1st of each season. This will help to keep the inadvertent wounding of trees with the consequential spread of oak wilt. If clearing has to be done at this time, all stumps and wounded trees shall have the wood areas painted thoroughly with a tree paint. Should oak wilt get started as a result of construction during the months of May and June, then the developer /builder shall pay for all additional oak wilt control measures needed to control the disease. This is in accordance with the City of Lino Lakes disease control ordinance number 15 -90 • 5. Where the City Forester has determined that irreparable damage has occurred to trees within tree protective zones, they must be removed and replaced. Page 6