A very important feature of road construction is drainage. New roads include designed drainage systems intended to remove water efficiently from the surface of the highway to provide a safe passage for all vehicles and pedestrians.

Older roads may have less sophisticated drainage, but all have features designed to take the water away from the road surface. It is necessary to clean and maintain these drainage provisions so that they can work properly.

Problems can occur even when drainage provisions are clean and well maintained. Flooded and waterlogged roads result when the amount of water arriving on the road is greater than the capacity of the drainage facilities that take it away. Exceptional rainfall, a road being in a low lying area, changes in 'run off' from adjacent fields and rivers overflowing are some situations that can lead to the road flooding or being waterlogged even when drains are in good working order. Material carried into the drains by floods can also lead to them becoming blocked. Drainage grills and gratings (e.g. on gullies) can become blocked very quickly when materials like mud are deposited on the road or when there is a heavy fall of leaves. If a flooded road is caused by a ruptured water main the water company will be responsible for repairing the damage.

Water is directed to drains by the road profile. Puddles (ponding) tend to occur if there is a depression in the road. This can be rectified where necessary by local patching of the road surface.

The following notes give guidance on whom to contact for various types of flooding:

Flooding from Public Sewers

The water company own and manage the network of public foul and surface water sewers. The majority of public sewers are located in highways and the Council has a copy of the sewer maps, which can be viewed at the Council Offices. To report an overflowing public sewer, you should call Kelda Water Services for Dwr Cymru Welsh Water Customer Services on 0800 0853968

Flooding from Private Sewers or Drains

If your private drains or sewers are overflowing, you will need a drainage contractor to deal with any blockage. See "Yellow Pages" under "Drain and Pipe Cleaning". If you are uncertain if any blockage is in the public or private sewers, the water company should be able to determine this, once on site, then recharge you the cost of any work on the private sewers.

Flooding from the Public Highway

For flooding from the public highway or reporting blocked road gullies or gratings, contact us on the details below.

Flooding from a Burst Water Main

The local water supply company is Dwr Cymru Welsh Water

Tel: 0800 0520130.

The water company is responsible for their supply up to and including the water stopcock.

Flooding from a Water Service Pipe or Internal Pipework

This is the responsibility of the homeowner or landlord and would need the attention of a plumber (see "Yellow Pages" or similar directories).

Flooding from a Main River

The main rivers are the responsibility of the Environment Agency, on 0845 933 3111. In addition, the Agency provide a "Floodline", which is a 24 hour advice and information service for floods and flood warning on 0845 988 1188.

Flooding from Watercourses, other than Main Rivers

Watercourses, other than main rivers, are the responsibility of riparian owners. You are a riparian owner if your property or land is on, or very near, a watercourse. Riparian owners have a duty to keep the watercourse clear of any obstruction to flow and the Council can serve legal notices on riparian owners to deal with obstructions. Certain "strategic" watercourses, that are known to pose a high risk of property flooding if they become blocked, are checked and maintained by the Council's contractor on a regular basis.

Provision of Sandbags to Protect against Flooding

The Council makes sandbags available to residents of the district, during emergency situations, to enable them to protect their homes from flooding. However, residents who are aware that their homes are at a high risk of flooding, e.g. as a result of the close proximity of a watercourse, are recommended to obtain sandbags from a builders' merchant to enable early preparation, as at times of flooding the Council's contractor may not be able to reach all properties before flooding occurs.

Contact Us

If you require further information or wish to contact the Local Resilience Unit please use the details below:

Local Resilience Unit

Unit 5, Triangle Business Park,

Pentrebach,

Merthyr Tydfil,

CF48 4TQ

Tel No: 01685 725162/725462