Project Update: Dallas Mill Creek Tunnel

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The $206.7 million Mill Creek/Peaks Branch/State Thomas Drainage Relief Tunnel Project for the City of Dallas involves 26,385 lf of 32-ft, 6-in. excavated diameter tunnel (30-ft ID) and seven shafts ranging from 120 to 200 vf. Tunneling will occur primarily in Austin Chalk with excavation via Main Beam TBM and Roadheader.

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As of late January, the project was 15 % completed by duration. The excavation of launching/entry shaft is in progress with 100 vf of 120 vf completed. The top bench excavation has been completed of the 39-ft diameter horseshoe Starter Tunnel. Mobilization has begun at two intake sites, and excavation of two 220-ft diameter intake shafts has started. TBM mobilization has started with parts currently arriving onsite for assembly and commissioning. In total there are six working sites within the city.

Owner: City of Dallas; Lead Designer: HALFF; Tunnel Designer: COWI; CM: Black and Veatch; TBM Manufacturer: Robbins; Subcontractor: Oscar Renda Constructing Inc.

Key Project Personnel: SMJV Operations Manager: Kent Vest; SMJV Senior Project Manager: Travis Hartman; SMJV Project Manager: Quang D. Tran, P.E.; SMJV Deputy Project Manager: Nick Jencopale; SMJV QC Manager: Matt Jackson.

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