Water management is one of the most important responsibilities in modern housebuilding. At Derwen May Homes, we approach drainage with the same care and discipline that guides the rest of our work. When communities raise questions about flooding and water management, we listen carefully and respond with evidence and engineering clarity.
During the Pre-Application Consultation for the proposed development at Bolgoed Farm, Pontarddulais, several residents raised concerns about the potential impact of development on local flooding and surface water. These concerns focused on the site’s elevation, historic water retention on parts of the land, and the wider flooding history associated with Pontarddulais.
These are important issues. They deserve clear answers.
Understanding Flood Risk at the Site
Technical assessment confirms that the Bolgoed Farm site lies entirely within Flood Zone 1, the lowest risk category for flooding from rivers, the sea or surface water. This classification means that the land itself is not considered to be at risk of flooding under national flood mapping.
Even so, good design requires more than meeting minimum classifications. The management of rainfall and surface water is central to the design of the development.
Our drainage strategy is built around a Sustainable Drainage System (SuDS) that manages water carefully across the site. Rather than allowing rainwater to flow rapidly off hard surfaces, the system slows, stores and treats water before releasing it safely into the surrounding environment.
A Landscape Led Drainage Strategy
Surface water across the development will flow through a series of sustainable drainage features before reaching a landscaped attenuation pond located to the west of the site. The pond stores excess rainfall during heavy weather and releases it gradually into the nearby watercourse.
This approach ensures that runoff leaving the development reflects natural greenfield rates. In simple terms, water leaves the site no faster than it would from the undeveloped land.
The pond itself forms part of a wider green infrastructure strategy. Planted with native aquatic vegetation, it provides water treatment and ecological benefit at the same time. Surface water is filtered naturally before discharge, supporting water quality and biodiversity.
A detailed drainage design will be submitted to the SuDS Approval Body (SAB) as part of the next stage of technical design. This approval process is separate from planning and ensures that drainage proposals meet strict national standards for safety, capacity and long term maintenance.
Protecting Local Water Quality
Some consultation responses raised concerns about nutrient pollution and the protection of the Burry Inlet Special Area of Conservation (SAC).
Natural Resources Wales has been consulted on this matter. Their advice confirms that the local planning authority will undertake a Habitats Regulations Assessment if required, ensuring that the proposal does not harm the integrity of the SAC.
In addition, a Construction Environmental Management Plan (CEMP) will be required to ensure robust pollution prevention during construction. These measures protect nearby watercourses and sensitive habitats.
Welsh Water has also confirmed that, subject to appropriate mitigation measures, the development is not expected to have an adverse impact on the Burry Inlet SAC.
Wastewater Infrastructure and Future Upgrades
Questions were also raised about the capacity of the Llannant Wastewater Treatment Works. Welsh Water has confirmed that improvements to the facility are planned, with completion expected by 2030.
To ensure that infrastructure capacity aligns with development, the planning framework includes a safeguard. Homes will not be brought into use before the required upgrades are completed or confirmed by the planning authority.
This condition ensures that wastewater infrastructure is strengthened before new connections are made. It provides an additional layer of protection for the environment and local water systems.
Engineering Confidence and Long-Term Responsibility
For Derwen May Homes, drainage design is not an afterthought. It is part of how a development works as a whole. Landscape, infrastructure and ecology come together to create systems that are both resilient and natural in appearance.
“As a civil engineer, I understand how critical water management is to responsible development. At Pontarddulais we have designed the drainage strategy so that rainfall is slowed, treated and released safely. Good engineering protects communities and landscapes, and that is exactly what this scheme is designed to achieve.” Huw Llewellyn, Managing Director, Derwen May Homes
A Responsible Approach to Water
The questions raised during consultation reflect a strong interest in protecting the local environment. We share that priority. Our drainage strategy combines technical engineering with landscape design to ensure that water is managed responsibly.
Flood resilience, ecological protection and long-term infrastructure planning are all built into the scheme.
At Derwen May Homes, we believe development should work with the natural systems of the land. When water is managed properly, communities are protected and landscapes are strengthened.
That is the principle guiding our approach at Pontarddulais.
Contact us to learn more about our planned new homes for sale in Pontarddulais.