The following images illustrate the progress of Meldahl’s construction in 2012.
Click the links below to view construction photos by year.

2014      2013      2011      2010

 

 

 


Aerial view


Unit 1 transformer pit west wall reinforcement


Set Unit 2 stay cone (centering cone) assembly


MWH – Unit 1 draft tube deck embedded piping

 


Setting Unit 1 stay cone – centering cone assembly


View of the intake area looking downstream


Concrete placement with 61 Meter Pump Truck


Unit 3 bulb turbine housing

 


Hardfill trial placement


View of the bulb turbine housing


Piping installation


View of intermediate draft tube liner formwork

 


Lifting Unit 3 bulb turbine housing for installation


Aerial view looking upstream


Unit 3 bulb turbine housing staged for installation


Overview of the intake area looking downstream

 


Aerial view


Powerhouse view looking into Ohio


Rotating bulb turbine housing to vertical position for
placement


Tailrace concrete formwork and shoring

 

 


Installing septic system in spoil area 1


Powerhouse construction crane – erect stiff-leg derrick


Setting formwork and reinforcing steel for the powerhouse


Formwork and reinforcement for Units 1-2 intake walls

 


Assembling the bulb turbine housing


Unit 2 draft tube invert


Formwork for draft tube concrete


Welding and aligning work for the draft tube liner

 


Looking downstream at the draft tube liner installation


Interior wall reinforcement for powerhouse concrete


Setting Unit 1 Section 1 for DTL installation


Bracing Unit 1 legs for draft tube liner

 


Aerial view


Testing draft tube embedded piezometer piping


Powerhouse reinforcement for stairway A


Overview of the draft tube area

 


Smoothing and leveling the concrete surface


Preparatory welding


Rock surface preparation powerhouse mud mat,
lower pool, river side


Installing embedded piping

 

 


Pouring and placing concrete


Concrete placement preparation for tower crane pads


View of nitrogen being added to the concrete mix

Preparation for concrete placement

 


Powerhouse reinforcement – Unit 2 dewatering and
oil-water separator pits


A segment of the draft tube liner

 


Rock preparation for mud mat

Mud mat placement

 

2014      2013      2011      2010      Top

 

Meldahl 2014

Meldahl 2013

Meldahl 2011

Meldahl 2010

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Cannelton Hydro Project

Smithland Hydro Project

Willow Island Hydro Project