Thanks Civilman for your advice. You're right the site is very steep. we are demolishing existing units and replacing with larger. We are attenuating the surface water associated with the new units to a greenfield run off rate in order to meet latest codes and also reduce the burden on the...
Dear All,
It's a common problem regarding the discharge of land drainage (from retaining walls) in areas where soakaways are not suitable. Obviously local authorities do not accept ground water/ land drainage discharges into their systems so how can we deal with these flows and volumes? is the...
Yeah it's a combined sewer. it runs from a 675 diameter pipe into a 3.1diameter pipe where the flow is then attenuated - I need advice on ventilting the man-hole so that pressure can be controlled to prevent surcharging - many thanks
Thanks for your response. The problem is both....I want to prevent the man-hole from surcharging, relieve the pressure during storm periods and keep the odour to a minimum. Due to the man-holes location and need to re-direct the pressure to a verge via a valve system i think? the traight forward...
Dear all,
i wonder if you can help me. We currently have a public sewer/ man-hole right in the entrance to our development, 12m deep with a 3.1m diameter combined attenuation facility at the bottom. When it rains the pressure is such that it blows the lid. I have approached the water authority...
