OHEL were awarded the drainage works as part of the Hitchin Grade Separation Project.
The scheme involved the construction of the new elevated route via imported fill embankments and an elevated rail flyover extending over 800m and comprising steel girders and concrete deck. The project was managed through the Alliance Integrated Project Organisation known as Hitchin Alliance.
The scope of Owls Hall works included delivering a varied and conclusive drainage package over the course of a 12 week programme. This project is part of a partnership that integrates the regulation of Network Rail and Civil Engineering methodology into a unique arena through consultation and project management resulting in delivering the works efficiently on time and in budget.
With this in mind the OHEL delivered a multiple programme of works incorporating a series of drainage solutions. This included soakaway and attenuation tanks designed utilising a crate system of 1m blocks bonded and wrapped in Geo-textile material ranging from 12m to 65m long and 2 to 5m deep. The remainder of the project delivered a system of standard drainage works such as catch-pit\\\’s up to 4m deep, pipes up-to 600mm and a series of v ditches linked by both pipework and headwalls.
The complexity of the project incorporated works under possession and employing temporary works using form C regulations.
Understanding the importance of delivering drainage solutions under the banner of Civil Engineering, whilst operating to exacting Network Rail Regulations is how OHEL delivered the programme of work with a very satisfactory outcome.
