Prospect Construction, Inc.

Prospect Construction, Inc. is a construction company in Puyallup, WA, operating as a heavy civil contractor specializing in complex water and wastewater treatment facilities and large-scale civil infrastructure. Founded in 1998, the firm has grown from its roots as a general contractor into a builder of treatment plants and civil infrastructure across the Northwest and Mountain West. The company serves communities in Washington, Montana, and Wyoming, with offices in Puyallup, Missoula, and Sheridan. Its work includes hydraulic structures, shoring systems, large concrete tanks, pump stations, process facilities, dewatering, structural steel, and mechanical systems. Beyond treatment plant expertise, the firm delivers mass excavation, deep and open-cut utility installations, site civil development, and large-diameter pipeline work. The business holds a rating of 4.30 based on customer reviews.

The company’s approach is defined by a management philosophy known as Partnering, which emphasizes collaboration, integrity, and fair treatment of owners, engineers, subcontractors, and suppliers. This method is designed to build strong relationships and execute high-performing projects. Prospect’s self-perform capabilities allow it to manage critical path activities, maintain quality control, and reduce schedule risk on highly technical projects. The team brings specific technical expertise in concrete construction, including formwork selection, thermal control planning for mass concrete, high-pressure placements, and climbing form systems. In mechanical and process systems, the firm has experience with biogas and sludge systems, air and water process systems, and the installation of stainless steel, large-diameter HDPE, and specialty mechanical components. The company’s core values include Passion, Courage, Team, and Stewardship, guiding how employees interact and deliver work.

Located at 116 23rd St SE in Puyallup, the office sits about 0.1 miles from East Main and 0.2 miles from Linden Golf & Country Club. The site is approximately 0.3 miles from the Puyallup River and 0.5 miles from Cascade Christian School and Shaw Road. The Valley Freeway is about 0.6 miles away.

The business is known for its positive rating from customers who have reviewed its work. It stands out in its category for its specialized focus on water and wastewater infrastructure and its long-standing presence in the Puyallup area.