Site O — Mill Creek Drainage Tunnel

Site O - Hwy 352/Dixon Ave

February 2020

TBM Pushed into the Starter Tunnel

TBM Pushed into the Starter Tunnel

Gantry #1 lowered into Starter Tunnel

Gantry #1 lowered into Starter Tunnel

Looking down right side of TBM pushed up to Starter Tunnel Face

Looking down right side of TBM pushed up to Starter Tunnel Face

January 2020

Lowering TBM Rear Main Beam into Outfall Shaft 1

Lowering TBM Rear Main Beam into Outfall Shaft 1

December 2019

TBM Assembled on the Surface

TBM Assembled on the Surface

Dallas Mill Creek TBM Media Day

Dallas Mill Creek TBM Media Day

Lowering TBM Cutterhead Support

Lowering TBM Cutterhead Support

May 2019

Site O Aerial

Site O Aerial

Site O Aerial

Starter Tunnel Gripper Walls

Starter Tunnel Gripper Walls

Starter Tunnel Gripper Wall Left Side

Starter Tunnel Gripper Wall Left Side

Starter Tunnel Gripper Wall Right Side

Starter Tunnel Gripper Wall Right Side

Outfall Shaft

April 2019

Outfall Shaft & Tail Tunnel

Outfall Shaft & Tail Tunnel

Starter Tunnel - Gripper Walls

Starter Tunnel - Gripper Walls

TBM Assembly - Gripper Carrier.

TBM Assembly - Gripper Carrier.

TBM Assembly

March 2019

Starter Tunnel Gripper Wall Footer Concrete

Starter Tunnel Gripper Wall Footer Concrete

Starter Tunnel Gripper Wall Footer

Starter Tunnel Gripper Wall Footer

Starter Tunnel

Tail Tunnel

TBM Assembly - Gantries

TBM Assembly - Gantries

TBM Assembly - Gantry 4

TBM Assembly - Gantry 4

TBM Assembly - Main Beam

TBM Assembly - Main Beam

TBM Assembly - Rear Beam Support

TBM Assembly - Rear Beam Support

February 2019

Starter Tunnel

Starter Tunnel Excavation Complete at EL 286.5±

Starter Tunnel Excavation Complete at EL 286.5±

Starter Tunnel Excavation Complete at EL 286.5±

Starter Tunnel Excavation Complete at EL 286.5±

Looking Down Outfall Shaft 120.5-ft Down

Looking Down Outfall Shaft 120.5-ft Down

Looking Into the Outfall Shaft

Looking Into the Outfall Shaft

Looking Up Outfall Shaft from EL 286.5±

Looking Up Outfall Shaft from EL 286.5±

Looking Up Outfall Shaft from EL 286.5±

Looking Up Outfall Shaft from EL 286.5±

Starter Tunnel Excavation Third Bench

Starter Tunnel Excavation Third Bench

Starter Tunnel from Top of Third Bench Looking at Outfall Shaft

Starter Tunnel from Top of Third Bench Looking at Outfall Shaft

Tail Tunnel Excavation at STA 7+09±

Tail Tunnel Excavation at STA 7+09±

Tail Tunnel Excavation at STA 7+46±

Tail Tunnel Excavation at STA 7+46±

Tail Tunnel Excavation

Tail Tunnel Excavation

TBM Assembly - Main Frame Bolted Together

TBM Assembly - Main Frame Bolted Together

TBM Assembly

TBM Outer Cutterhead Lower Support

TBM Outer Cutterhead Lower Support

TBM Vertical Front & Outer Cutterhead Lower Support

TBM Vertical Front & Outer Cutterhead Lower Support

TBM Vertical Front & Outer Cutterhead Lower Support

TBM Vertical Front & Outer Cutterhead Lower Support

TBM Vertical Front Support

TBM Vertical Front Support

TBM Vertical Front Support

TBM Vertical Front Support

TBM-Assembling Gantries #1 & #4

TBM-Assembling Gantries #1 & #4

TBM-Assembling Gantries #1, 3 & 4

TBM-Assembling Gantries #1, 3 & 4

January 2019

Shaft Starter Tunnel Face at STA 10+72

Shaft Starter Tunnel Face at STA 10+72

Shaft Starter Tunnel Third Bench

Shaft Starter Tunnel Third Bench

Shaft Starter Tunnel Third Bench

Shaft Starter Tunnel Third Bench

Shaft Starter Tunnel Third Bench

Shaft Starter Tunnel Third Bench

Shaft Looking up Outfall Shaft 47 ft Diameter

Shaft Looking up Outfall Shaft 47 ft Diameter

Shaft Looking up Outfall Shaft 47 ft Diameter

Shaft Looking up Outfall Shaft 47 ft Diameter

Shaft Looking Down Outfall Shaft at Starter Tunnel Excavation

Shaft Looking Down Outfall Shaft at Starter Tunnel Excavation

Shaft Looking Down Outfall Shaft at Starter Tunnel Excavation

Shaft Looking Down Outfall Shaft at Starter Tunnel Excavation

Shaft E-Vibratory Hammer Driving Sheet Piles

Shaft E-Vibratory Hammer Driving Sheet Piles

September 2018

Rock Excavation below Concrete Collar

Rock Excavation below Concrete Collar

Outfall Shaft Rock Excavation

Outfall Shaft Rock Excavation

Outfall Shaft Looking Up

Outfall Shaft Looking Up

Drilling & Installing Split Sets and WWF Mesh

Drilling & Installing Split Sets and WWF Mesh

August 2018

Rock Excavation in the Outfall Shaft

Rock Excavation in the Outfall Shaft

Installation of Rock Bolts in Outfall Shaft.

Installation of Rock Bolts in Outfall Shaft.

Storm Drain Inlet No. 10 Installed on Barber Avenue

Storm Drain Inlet No. 10 Installed on Barber Avenue

July 2018

Installation of 1st Ring Beam for Outfall Shaft SOE

Installation of 1st Ring Beam for Outfall Shaft SOE

Outfall Shaft Overburden Excavation

Outfall Shaft Overburden Excavation

June 2018

Waterline Installation along Barber Avenue

Waterline Installation along Barber Avenue

Start of Outfall Shaft Liner Plate Support of Excavation

Start of Outfall Shaft Liner Plate Support of Excavation

May 2018

Demolition of Northside of Barber Avenue

Demolition of Northside of Barber Avenue

April 2018

Stripping Top Soil from Shaft O

Stripping Top Soil from Shaft O