대시카고의 메트로폴리탄 개간지역(Metropolitan Water Reclamation District, MWRD)은 우수와 하수의 혼합 저장 용량 45만 갤런을 추가하도록 하는 합의에 도달했다고 발표했다. 이는 궁극적으로 남쪽 교외 지역의 홍수 피해를 줄일 수 있을 것으로 기대된다.

MWRD는 채석장 채굴과 관련해 Hanson Material Service사와 연장을 허용했으며, 2020년까지 Thorn Creek의 지역의 홍수로 인한 물을 저장해서 Thornton Transitional 저수지에 계속 사용하기 위해 연간 75만 달러를 연간 투자할 방침이다.

 

 

 

The Metropolitan Water Reclamation District of Greater Chicago (MWRD) announced that it has reached an agreement that will allow space for an additional 4.5 billion gallons of storage capacity for combined sewage and stormwater, ultimately reducing flooding in the south suburbs.

 

The MWRD was granted an extension with Hanson Material Service Corporation, which is mining the quarry. The $750,000 annual investment will allow the District to continue to use the Thornton Transitional Reservoir (TTR) for storage of floodwater from Thorn Creek through 2020. Terms of the deal were approved by the District's Board of Commissioners on Thursday, April 23.

 

"This is a great opportunity for the District and the south suburbs," said MWRD President Mariyana Spyropoulos. "It will allow us to prevent future flooding by adding capacity and will also help us determine how much storage will be needed when the composite reservoir is completed this year."

 

The TTR, completed in 2003, is used strictly for stormwater from the Thorn Creek drainage basin. It is located in the lower west lobe of the Thornton Quarry across the interstate highway from the Thornton Composite Reservoir (TCR). When completed this summer, the TBR will hold up to 7.9 billion gallons of combined sewage and stormwater from 14 communities throughout the south suburbs and South Side of Chicago, making it one of the largest reservoirs of its kind in the world.

 

In addition, having the TTR available will allow MWRD engineers more time to evaluate the storage capacity in the TCR, given the increasing amount of heavy rainstorms in recent years. The Thornton Quarry is part of the District's Tunnel and Reservoir Plan (TARP), also known as "Deep Tunnel," providing a series of deep, large diameter tunnels and vast reservoirs aimed to reduce flooding and improve water quality in area rivers and streams.

 

The Thornton Reservoir is set to come online at the same time as disinfection facilities at the MWRD's Calumet Water Reclamation Plant in Chicago. Working in tandem, the combination will maximize water quality while minimizing flooding.

 

[출처 = Water World / 2015년 5월 6일]