The Hoffer Experience – Managing Invasive Construction During Treatment Operations to Achieve


  • David Dismukes, Cory Hopkins - Hazen and Sawyer
  • James Merritt - PWC

The P.O. Hoffer Water Treatment Facility (Hoffer) is the largest of two facilities located in Fayetteville, NC that serves the City and surrounding area including the Fort Bragg Military Base. Hoffer was originally constructed in 1967 with additional capacity increases in 1974 and the mid-1980’s. Due to the age and deterioration of the facility’s existing structural and mechanical infrastructure, Hazen was commissioned to create construction documents that would replace and upgrade several of the major process equipment components within the facility with the goal of increasing the facility’s reliability to sustain treatment operations. The reliability improvements project is the first of three project phases to support the eminent expansion of the facility to accommodate anticipated population and subsequent demand growth in the greater Cumberland County area. This paper will focus on the specific challenges of rehabilitating or replacing process infrastructure during the construction process at Hoffer and what steps were taken to keep the facility operational. Coordination details will be presented explaining work items that required complete facility shutdown efforts as well as field efforts to manage hidden conditions that unexpectedly prolonged complex work activities. Illustration of the procedure utilized to effectively plan and coordinate multiple facility shutdown events will also be presented documenting a protocol proven to successfully tackle the construction/operations balance. Further, both Engineer and Owner perspectives will be shared identifying lessons learned in an effort to further improve upon the coordination measures utilized in this project. Recent industry trends find utilities doing more with less – upgrading and expanding within the boundaries of their existing treatment facilities leading to intrusive construction activities on treatment operations. With other local utilities contemplating similar facility upgrade projects, the goal of this paper is to provide the audience with a “road map” to coordinate construction and operation activities between Owner, Engineer, and Contractor ensuring project success.

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Horizons Fall 2017 (pdf)

Horizons showcases significant water, wastewater, reuse, and stormwater projects and innovations that help our clients to achieve their goals, and can help you achieve yours. Articles are written by top engineers and process group leaders, demonstrating and explaining the beneficial application of a variety of technologies and tools.

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