Rostholme Square – Sewer Rehabilitation Scheme

Rostholme Square is a small estate in Doncaster, South Yorkshire, with a history of internal and external sewer flooding. On behalf of Yorkshire Water, Barhale investigated the cause and developed a solution to resolve the problem. Intensive survey works were carried out, including flooding questionnaires sent to all the residents, giving a holistic view of the problem. The study found that the existing sewer, located in residential gardens of Holly Drive and Rostholme Square, lacked the gradient to achieve self-cleansing velocities so would therefore get blocked, causing the flooding problems. The team also found that the sewer which connected to the downstream network was unable to cope with the flows, causing some localised area flooding in the highway. The results of Barhale’s investigation works altered Yorkshire Water’s proposed solution of a pumping station to a gravity system, resulting in reduced cost and potential disruption. Our proposed solution was to relay the sewer to achieve the required gradient and divert the network connection point from its existing setting to another suitable point. This meant that the team also had to go through some allotment land.
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