Attenuation, Infiltration, SuDS and Surface Water Management Case Studies
Case Study on the Installation of a Value Engineered Drainmax Surface Water Infiltration Tank at Industrial Estate
Project Overview:
BMS worked with Ciaran Hourican Construction and Goodness Grains, a leading specialist baker of gluten free products to design, install and certify a value engineered 105 m3 capacity surface water infiltration system using BMS Drainmax Tunnels as part of an extension at the Goodness Grains Bakery in Longford.
BMS worked closely with the client to develop a cost-effective solution that combined a competitive upfront price with a value engineered design that minimised associated civil works costs.
Project Details:
COMPLETION DATE
May 2026
CLIENT
Goodness Grains / Ciaran Hourican Construction
BRIEF
Design, supply, install, and certify a BMS Drainmax Tunnel surface water infiltration system with a total capacity of 105 m³ (105,000 L). BMS worked closely with the client to develop a cost-effective solution that combined a competitive upfront price with a value engineered design that minimised associated civil works costs.
BMS also supplied a 0.66 l/s BMS Stormbrake Outlet Flow Control.
VALUE
€10,000 +
Goodness Grains/Ciaran Hourican Construction, a leading contractor in residential developments, were delivering an extension to Goodness Grains Bakery in Longford. Having worked with BMS previously, they engaged BMS to develop a tailored surface water infiltration solution that would meet both budgetary and technical requirements.
The design remit was as follows:
A strong focus on delivering a value engineered solution that minimised civil works costs while maintaining a competitive upfront price.
Full turnkey delivery from design through to installation and certification.
Preparation of detailed design drawings for approval by the client and the relevant local authority.
A design that allowed for rapid installation despite restricted access and difficult ground conditions.
Inclusion of BMS Isolator Row Technology to create an essentially maintenance-free system, alongside a BMS Petrol/Oil Interceptor.
Drainmax Site Layout
Solution & Delivery:
BMS worked closely with Goodness Grains and Ciaran Hourican Construction to achieve all project objectives:
The final design minimised excavation requirements, reduced the stone surround volume and shortened the installation time.
BMS conducted detailed hydrographical analysis and surface water runoff calculations using specialist in-house software, enabling a fully bespoke design from first principles.
Multiple design iterations were developed in collaboration with the client and approved by the project engineers and local authority.
Despite these constraints, BMS successfully installed and certified the system within a tight timeframe, ensuring minimal disruption to the overall construction schedule.
BMS incorporated its Isolator Row Technology to prevent silt build-up, ensuring long-term performance with minimal maintenance requirements.
BMS can offer a ‘one stop shop’ for all surface water requirements. In this case BMS also supplied a BMS 0.66 l/s BMS Stormbrake Outlet Flow Control.
Drainmax Isolator Row
Operation/Maintenance Details:
BMS Drainmax installations are designed to be maintenance free, which is an important consideration considering the 50 year lifespan of most attenuation systems. More details can be found in the Drainmax DIBT Certificate or by contacting BMS.
Why choose Drainmax for your next project?
Ease of Installation: Lightweight tunnels (32 kg) can be lifted by two people and simply overlap for quick assembly—no complex connections required.
Superior Value: The system integrates clean stone into the storage calculations, maximising volume while minimising costs.
Maintenance-Free Options: Our R&D team developed a unique "Isolator Row" that captures grit and silt at the inlet for easy maintenance via jet washing. This is a key consideration for planning authorities.
Certified Strength: DIBT certified for structural integrity, supporting axial loadings of up to 10 tonnes.
BMS can offer a ‘one stop shop’ for all surface water requirements including attenuation, infiltration, interceptors, vortex oil/silt separators, stormbrakes and holding tanks from design right through to installation and certification. BMS have an unrivalled 40 years of experience manufacturing and installing surface water and wastewater management systems in Ireland, the UK and 60+ countries around the world.
BMS offer complimentary surface water design consultations and project designs. Please contact us to discuss your project.
If you would like to know how to design and select a Surface Water Management System including Soakways, Infiltration and Attenuation Systems, you can find out in our helpful Webinar below
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