Highway drainage and flooding

Drainage

The cleansing of highway gulleys (drains) is performed routinely based on the risk of blockage.

Drainage works can vary but will involve:

• investigating and identifying defects
• replacing existing damaged highway surface water systems
• replacing soakaways or ditches
• highway pond maintenance

Not all surface water systems are our responsibility, and maintenance of almost all ditches in the district, including roadside ditches, are the responsibility of the landowner. Foul water systems are mainly under the ownership of water authorities.

Flooding

You can find out more about flooding on our 'flooding: be prepared' page and our flood risk management page.

You can find out about ordinary watercourse consents for works involving ordinary watercourses here.