Water & Drainage

Go to our water and drainage projects now.

Flood risk investigation and good drainage design has become a necessity over recent years due to an increased risk of flooding across the UK and beyond.

Furthermore, amendments to the Water Industries Act have demanded changes in the design of adoptable drainage and the procedures for its adoption.

Datrys has ensured that our engineers are able to meet these needs.

We therefore work closely with Dŵr Cymru / Welsh Water to streamline the process of drainage design and adoption.

We are also conversant with the latest requirements of Natural Resources Wales in relation to assessing flood risk to TAN 15.

We carry out one dimensional and two dimensional flood modelling.

In addition, we make widespread use of SuDS in the design of storm water drainage systems to minimise off-site discharge.

Our services include:

  • Storm-water drainage design using SuDS
  • Foul and surface water drainage design to Sewers for Adoption 7
  • Flood Consequence Assessments to TAN 15
  • Flood modelling using FEHB, 1 & 2 dimensional modelling including breaches



Caernarfon: 01286 671027

Mold: 01352 706205

Email: info@datrys.coop


Institution of Civil Engineers (ICE) Approved Employer
Approved to operate the ICE training scheme