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Thornton Gap (Tollway)

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Thornton Gap (Tollway) completed
Thornton Gap (Tollway) completed

Particulars

Owner: MWRDGC (Metropolitan Water Reclamation District of Greater Chicago)

Designer: MWH

Contractor: FH Paschen/Cabp

Statistics

Type: Gravity

Purpose(s): Flood Control

Reservoir capacity: 1 m3x106

Height: 35 metres

Length: 69 metres

Volume of RCC: 25 m3x103

Total volume: 25 m3x103

Construction Dates

Start of Project: 02/10 (February 2010)

Start of RCC: 06/11 (June 2011)

End of RCC: 09/11 (September 2011)

End of Project: 11/11 (November 2011)

Country: USA

River: -

DMS Co-ordinates: 41˚34'47.71"N, 87˚37'8.08"W

DD Co-ordinates: 41.579918, -87.618912

Facings

Upstream

SlopeType
VerticalRCC against formwork (GEVR/GE-RCC)

Downstream

SlopeType
 RCC against formwork (GEVR/GE-RCC)  [stepped face]

Spillway

SlopeType
 RCC against formwork (GEVR/GE-RCC)  [stepped face]

Placement

Layers (mm)Lifts (mm)
300300

Cementitious material

Cement (kg/m3)
48
Pozzolan (kg/m3)Pozzolan Type
79Low-lime flyash (ASTM Class F)