Catchment Sensitive Farming: Practical Tips

Practical Tip: Yard works for clean and dirty water separation

This work may include re-organisation of clean and foul drains, catchpits, gulleys, kerbs, ‘sleeping policemen’, and associated yard areas to reduce the amount of foul drainage collected; and improvements to foul drainage to avoid run-off to surrounding areas.

Clean water should not be contaminated by foul/dirty water. The foul/dirty water drainage (that includes slurry or manure residues) should conform to the Control of Pollution (Silage, Slurry and Agricultural Fuel Oil) Regulations 1991 (as amended) and have a minimum design life of 20 years (with maintenance). For yard area construction, use a 150 mm thick slab of concrete over at least 150 mm thickness of compacted hardcore. It is recommended that the slab is reinforced to minimise cracking. Seal all joints. The work should satisfy the relevant British Standards or other relevant or equivalent standards such as:

  • BS 8500 Concrete(complementary to BS EN206-1);
  • BS EN 206-1 Concrete: Specification, performance, production & conformity
  • BS 8110 Structural use of concrete;
  • BS 6213 Selection and use of sealants;
  • BS 5502 Buildings and structures for agriculture;
  • BS 8301 Building drainage.

Good gutters can be used to recover roof water and reduce rainwater entering slurry systems

Source: SAC

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