3. Draft Tree Survey Brief
3.1 A survey is to be undertaken of all trees within the curtilage of the Properties.
3.2 The survey shall include the following:-
3.2.1 The identification of every tree located within the curtilage or boundary of each of the Properties
3.2.2 the location of each tree will be plotted using the Geographic Information System and mapped;
3.2.3 each tree shall be identified as an Authority or Leaseholder responsibility.
3.3 The following details of each tree shall be recorded:
3.3.1 its species in Latin and English;
3.3.2 its height;
3.3.3 other relevant information regarding the nature of the tree;
3.3.4 distance between the tree and the Property;
3.3.5 other relevant information regarding the relationship of the tree to the Property and to other of the Property's associated structures, including walls and fences.
3.4 The recommended works for each tree shall be identified and classified as follows:-
3.4.1 emergency works (trees that are dead, dying, dangerous or are imminently dangerous).
3.4.2 essential works being:-
(a) trees that are causing obvious structural damage or are so close to the Property or an associated structure that physical damage is unavoidable;
(b) trees that are dead, dying or are becoming physically unsound but not imminently;
(c) trees in respect of which there is a statutory obligation to prune e.g. blocking the public highway (section 154 of the Highways Act 1980).
3.4.3 necessary works (trees that are considered likely to cause damage to the Property or an associated structure in the future unless avoidance action is taken e.g. large trees, self sown trees).
3.4.4 desirable works (trees in respect of which future action is considered to be desirable in order to protect the Property or an associated structure but not essential).
3.4.5 no action required (trees where no action is required).
3.5 Trees that require cyclical pruning will be identified and recommendations will be made for the length of the pruning cycle.
3.6 The cost of the recommended works for each tree plus an additional sum to meet possible and foreseen contingency arrangements will be assessed. The Contractor, the Authority's Representative and [Arboriculturalist] will assess costs as being Authority or Leaseholder costs, in whole or in part and, where in part, the percentage of the costs to be met by the Authority and the Leaseholder shall be apportioned.
3.7 The Contractor shall be responsible for ensuring that Leaseholders comply with their Leaseholder's Lease in carrying out their own works or meeting such proportion of such costs.
3.8 Where tree works are required to be undertaken on behalf of a Leaseholder and are paid for by the Authority, the Contractor shall consult with the Leaseholder and, with the assistance of [Arboriculturalist], shall estimate the cost of such tree works. Once the tree works have been carried out, the cost of such works shall be invoiced by the Contractor (with the assistance of Greenspace) to the Leaseholder and the Contractor shall (with the assistance of Greenspace) issue an invoice to the Authority in respect of Recoverable Leaseholder Costs. The provisions of clause 28.1 of the Agreement shall apply at all times.
3.9 Where tree works are not required to be undertaken on behalf of the Leaseholder, the Contractor shall take such enforcement action as may be provided for under the Leaseholder's Lease in order to facilitate the carrying out of such tree works by the Leaseholder.
3.10 The cost of the recommended cyclical pruning will be estimated plus an additional sum to meet possible and foreseen contingency arrangements.
3.11 The estimated tree survey timetable including the preparation and presentation of a draft report for review by the Authority and the Contractor is 16 weeks.
3.12 The Authority shall fund the tree survey, the establishment of a tree database, the assessment of the survey results and production of the draft and final survey report.
3.13 The tree survey shall be managed by [Arboriculturalist] in accordance with this brief.