Environment Agency investigating major water pollution incident
Environment Agency officers will continue working today on a major sewage pollution incident which has left thousands of fish dead in West London.
An estimated 3000 fish are now dead in the River Crane, a tributary of the River Thames, after raw sewage began to discharge into the river on Saturday. Environment Agency officers have been working round the clock to try and minimise any further environmental damage,, taking water samples and assessing the impact on fish.
A silver command has been established to bring the situation under control as quickly as possible.
Environment Agency Area Manager Julia Simpson said: "This is a major incident and it appears that thousands of fish have been killed. Environment Agency officers have been working around the clock to minimise any further impact this incident has on the environment. We will be overseeing the clean up and have launched a full investigation.
"We advise people to keep themselves and their pets out of the water until the incident is resolved."
A spokesman for Thames Water explained that "a two-metre valve (penstock) in a major sewer serving Heathrow Airport
jammed shut on Saturday afternoon at Cranford Bridge on the A4 Bath Road
while engineers carried out routine maintenance.
"All attempts to re-open the valve were initially unsuccessful. It is now
being forced open using specialised lifting equipment fitted overnight.
"While we are able to take a lot of backed-up sewage away in tanker lorries
for treatment, the volume of sewage was such that we were not able to
tanker all of it.
"Faced with the unpalatable choice of letting the remaining sewage back up
into the airport or spill to the River Crane, we were forced to opt for the
latter, resulting in sewage entering the river and damaging wildlife, which
we deeply regret.
"Once normal flows resume, probably later this morning, some stronger than
normal effluent will arrive at Mogden and this may cause elevated odour
levels for a few hours, for which we wish to apologise in advance.
"Some of the pollution from the River Crane has passed into the Duke of
Northumberland river, and this has required a temporary closure of the
footpath through the Mogden works, for which we would also like to
apologise."
October 31, 2011