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To use design to help our clients succeed.

We create exceptional environments that meet our clients' most complex design challenges.

We inspire people through our work by expressing timeless cultural, organizational and personal values.

We connect people and place with ideas that come from many minds and imaginations.

We care about serving our clients, enriching lives, improving communities and protecting our natural environment through design.

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60+ Years of Design + Innovation

A Modern, Medium-Security Prison Designed to Rehabilitate

California Department of Corrections and Rehabilitation
Mule Creek Infill Complex

Ione, California, USA

Built to address overcrowding within the California Department of Corrections and Rehabilitation, this complex brings an additional 1,584 beds to the original Mule Creek facility opened in 1987.

Though technically an infill project for the adjacent prison, the team designed the new facility (located 30 miles southeast of Sacramento) to function as a self-contained corrections center. The Mule Creek Infill Complex comprises a total of 23 medium-security buildings, including six dormitories that incorporate natural light and sound-deafening acoustics designed to create a more therapeutic environment.

Additional buildings on the 60-acre facility provide space for food services, academic and career training, rehabilitation classes and healthcare for all inmates, including those with physical and mental concerns.

HOK teamed with developer Hensel Phelps on the design-build project, which was designed and constructed to LEED Silver certification standards.


LEED Silver anticipated


540,000 sq. ft. / 50,170 sq. m.
1,584 beds


Design Management
Landscape Architecture
Sustainable Design


International Partnering Institute – Partnered Project of the Year,
Buildings/Public Infrastructure Mega Projects – $250M+

Design-Build Institute of America
Western Pacific Region
Merit Award for Excellent Implementation


1 July 2016
“New Mule Creek Infill Complex Helps the CDCR Meet Federal Mandates”
Correctional News