Further tree reports are commonly requested following a BS5837 (pre-development) survey to assess potential conflicts between a development site and retained trees.
The information provided in these reports will enable the development to go ahead ahead with minimal harm to the trees, often achieved by using special engineering techniques and porous surfacing.
We work closely with architects, developers and construction firms for the following three reports, and provide tree reports for domestic clients on a smaller scale.
Arboricultural Impact Assessment (AIA)
If a proposed development could have consequences for retained trees, the local planning authority is likely to request an Arboricultural Impact Assessment, or ‘AIA’ report, to highlight the conflicts.
The AIA includes evaluation of the direct and indirect effects of the proposed development on retained trees, and recommended mitigation measures to minimise the conflict between the proposed construction area and the trees.
Once the conflicts have been evaluated, methods for designing around the trees without causing damage need to be detailed: this report is known as the Arboricultural Method Statement.
Finally, the Tree Protection Plan will show information such as tree removals, retained trees, protective fencing, types of surfacing, level changes, service runs, facilitative crown reduction work and any special engineering techniques.
Arboricultural Method Statement (AMS)
The Arboricultural Method Statement, or ‘AMS’ report, follows on from the BS5837 tree survey and the AIA report. It proposes measures to mitigate for certain conflicts between trees and the development, including:
- Root protection area (RPA) incursion
- Shading from trees
- Interference with tree crowns
- Demolition, ground level changes, new surfacing and new services
These measures are aimed at protecting retained trees from harm during the development works.
A Tree Protection Plan is included with each AMS.
Tree Protection Plan (TPP)
The Tree Protection Plan shows the recommended placement of tree protection barriers and the location and type of ground protection required to minimise tree damage. The ‘TPP’ may also include details of service runs, working space, ground level changes, site access and storage, landscaping areas and special construction techniques.
This plan is essential for the construction team to design, plan and co-ordinate works so that retained trees are not damaged.
Please contact Arbor Vitae Arboriculture for further information.