H. A. Spalding Engineers, Inc.

    Hazard Waste Water Treatment Plant

    Hazard, Kentucky

The City of Hazard is one of the largest communities in southeastern Kentucky.  The city lies in the mountainous region of the Appalachian chain.  In the early 1990’s, Hazard was faced with a wastewater treatment facility that was hydraulically and biologically overloaded due to population and service area growth.  H. A. Spalding Engineers was selected to complete the 201 Facilities Planning process and subsequent design of a new treatment facility.  Several sites were investigated, including one site, which would wholly eliminate an existing Sanitation District. Various public meetings were held, with community involvement and participation being very high. The final site selected was challenging from both a topographic and available area standpoint.  The site was bounded on the east and south by a ridgeline with an approximate relief of 600’, on the west by an existing railroad, and on the north by an existing state highway. To minimize the site constraints noted above, the plant has several unique design features.  The final layout utilized a carousel type oxidation ditch with laboratory, press area, screening area, office area, grit collection area, and disinfection facility mounted on top of a “race track” style oxidation ditch. The WWTP is a 3.0/6.0 MGD design/peak flow plant. Other treatment units include dual 80’ diameter clarifiers, aerated sludge holding basin, and dual chlorine contact chambers. To allow construction in the alluvial plain, approximately 7,000 linear feet of driven H-piles were used.  Approximately 6,000 cubic yards of concrete were poured during construction. Other tasks included: topographic surveying, site grading design, construction supervision, project administration and leading a multi-disciplinary team.

H. A. Spalding Engineers, Inc.

651 Skyline Drive

Hazard, Ky. 41701

Ph. 606-436-2151

Fax. 606-436-2291