Proposal by the Northeast Ohio Regional Sewer District to build 64 km of tunnels and sewers as part of a $519 million project to clean up Lake Erie. Tunnels would be 1.8 to 7.3 m in diameter with 23 km from E. 55th St to E. 185th St and under the University. Time frame spread over 25 years or more. 48/01. The regional sewer district plans to build 35 miles (56 km) of sewers and storage tunnels as part of a $371 million project to reduce pollution flowing into the Cuyahoga river and several tributaries. The project is the fourth and last that the regional sewer district has developed over the past eight years to control the amount of both sanitary sewer waste and storm water that goes into Lake Erie, the Cuyahoga and other Greater Cleveland's waterways. The project will replace aging sewer systems on Cleveland's south side and in Brooklyn, Newburgh Heights, Cuyahoga Heights and Linndale. Two deep sewer tunnels are the centrepiece of the southerly plan, which cost $8.5 million. They will collect and hold 100 million gallons (378 million litres). Work to start in 2007 and to be done over 30 years. 26/02.With more than 120 km of tunnels built over a span of 30 years, the Northeast Ohio Regional Sewer District (NEORSD) is one of North America's more experienced agencies in tunnel design and construction. The NEORSD has selected Hatch Mott MacDonald (HMM) to design the Euclid Creek storage tunnel project, the largest diameter tunnel in their conveyance network to date. The tunnel will store 208.2 million litres of combined sewer overflow along a 4.8 km alignment and will range from 7.3 to 8.5 m in diameter. The tunnel will discharge by gravity into a future pumping station at the Easterly wastewater treatment plant. The project will help limit and control CSO discharges to Cleveland's east side creeks, streams, and Lake Erie. Project facilities will include numerous construction shafts, diversion structures and drop structures, and 1.6 km of near-surface consolidation sewers. Design completion is targeted for June 2007, with start of construction expected in early 2008. Visit www.hatchmott.com and www.neorsd.org 30/06.