East Anglia ONE Offshore Windfarm Landscape Management PlanWork No 38 to 41
August, 2016
6.8 Aquatic and Marginal Grass and Planting Mixes (G6, G7) 92.
The intention of the aquatic and marginal grass and plant mixes is to stabilise SuDS elements: swale base, detention basin and permanent pond with species that a suitable for regular and frequent inundation; whist providing a valuable biodiversity resource to the local area. Details of the maintenance of aquatic and marginal grass areas are detailed in Table 6-7:
Table 6-7 Maintenance of Aquatic and Marginal Grass Aquatic and Marginal Grass Maintenance
Cutting
Generally, as required, cut grass in swales, access and overflows when it is 75-100mm high, not allowing it to exceed 150mm. Wetland or meadow vegetation cut at 50mm once a year and removed to wildlife areas or compost. Weed Control
Manual weed treatment only, no chemicals to be used. Any areas of failed grass or vegetation will be cultivated and reseeded and replanted in the next appropriate planting/seeding season. Watering
Unlikely to be required due to the type of species proposed (i.e. aquatic and marginal aquatic). However, should additional watering be required during the establishment period, then the contractor will need to arrange for a mobile water bowser or tanker to bring the required clean water to site.
6.9 Programming of maintenance tasks 93.
The following is an indicative annual schedule of maintenance visits that will be undertaken for the first 10 years of establishment within woodland and hedgerow planted areas (WM1 -WM4 and H1) and for the first five years of establishment within grassland habitat areas (G1 – G7). This provides a reasonable frequency of the more common operations, and a good indication of the required level of intensity of management required but is not intended to be fully comprehensive or restrictive.
94.
An appointed contractor will be required to construct a schedule of operations specifying operations and frequency using his own experience and horticultural knowledge.
95.
The ongoing programme of maintenance work will include proposed frequency of visits and operations detailed in the specification, i.e. pruning. It will also include scheduled dates for:
infrequent operations such as re-spacing of plants, pruning, topping up of mulch, replacement of plants / restocking of beds etc.;
Planting review and refurbishment; Monitoring and review; the effectiveness of the management operations is to be closely and continually monitored and reviewed annually against the NBS Specification and this Maintenance Plan, with any resulting changes incorporated into the subsequent years’ programme.
East Anglia ONE – EA1-CON-F-GBE-008554
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