When cleared, a full site walk, with an agronomist, is essential to assess the damage
wear. Bare ground could need 40- 50g/m2
of a ryegrass
The result of 120,000 people on a sports pitch. This need significant works including decompaction, surface cultivation and seeding
employed for the break down. Once the site is clear the whole area needs to be litter picked removing all items, especially those pushed into the soil.
Remedial works
When cleared, a full site walk is essential to assess the damage caused. Ideally, an agronomist should be present. The damage will depend on the weather during the event, the grass condition pre-event, the number of visitors, the soil type, etc. Normally, the site will be worn but the grass may not be completely killed. The typical repair action would be to harrow or rake the areas to lift any flattened grass, decompact the surface, fertilise and overseed at a rate dependent on the
type mixture, whereas slightly thinned grass could require 25-30g/m2
.
The seed should be slit seeded in two or three directions.
Small areas could be returfed, but this often tends to be outside the budget and, as long as there is sufficient time for recovery before play, it is generally unnecessary. The rate of recovery can be greatly enhanced by irrigation if rainfall does not occur in any quantity. There is a likelihood that the whole site will be compacted through the footfall of the audiences. This will need to be relieved via vertidraining or the use of other types of decompaction tools. The choice will be dependent on the level of compaction and would be best advised through your consultant. Areas of roadways are often dead after an event and can be very compacted. Sometimes, the only way forward is to cultivate and reseed, although multiple
decompaction passes and disc seeding may be adequate. If there are any deep ruts, these could be lifted out manually and then topdressed smooth with appropriate topsoil before being seeded. Filling ruts with soil will not remove the deep compaction and the old rut may hold water later. If a rut occurs over a drain line then the area should be excavated to check the drain has not been damaged. Repairs should be made and the area reinstated. Areas of contamination should be dealt with accordingly. As mentioned earlier, the above operations can be very expensive and should be built into the project costing. Finally, any damaged trees should be pruned or replaced.
Conclusion
The use of pitches for events can be financially lucrative and will continue to be culturally important. However, the event needs to be carefully managed and the risks evaluated. Contracts need to include remedial costs and works, and do not forget to include a contingency sum to cover the unexpected.
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