Project Overview
The City of Greenville, Texas, relies on Lake Tawakoni as its sole source of raw water. With intake and transmission infrastructure dating back to the 1950s and 1960s, the City launched a major capital improvement program to modernize its delivery corridor. MH Civil was selected to execute the Raw Water Main Parallel Pipe Project and related pump station improvements, a critical infrastructure effort with a contract value exceeding $33 million. The scope featured the installation of a 20-mile-long parallel transmission main and significant upgrades to the Lake Tawakoni raw water pump station.
The Problem
- Single Source Vulnerability: The existing raw water line was the City’s only source of water; any failure in the aging 1950s-era infrastructure posed a catastrophic risk to Greenville’s water supply.
- Capacity Constraints: The original system was limited to 19 MGD (million gallons per day), which was insufficient to meet the City’s ultimate future demand of 38 MGD.
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Aging Infrastructure: Decades of service had left the intake and header facilities at the pump station in need of modernization to ensure long-term operational resilience.
Our Solution
The project centered on a massive logistical and engineering effort: the installation of over 102,000 linear feet of 36-inch fusible C900 PVC pipeline. MH Civil self-performed critical scopes, including excavation, pipe installation, and complex jack-and-bore crossings, including over 1,800 linear feet of 48-inch steel casing.
To stabilize the system and prepare for increased flow, the solution included pump station and header improvements, highlighted by the installation of two 25,000-gallon bladder surge tanks and new ductile iron headers. Throughout construction, MH Civil prioritized stakeholder coordination, managing traffic control, utility locating, and proactive public communication to minimize the impact on local residents and businesses.
The Results
The project successfully modernized Greenville’s primary water artery, expanding the system’s ultimate delivery capacity from 19 MGD to 38 MGD. By Pay Application 26, MH Civil had installed more than 19 miles of 36-inch pipeline and completed dozens of critical valve vaults and drain assemblies.
The impact of this disciplined execution was reflected in the City’s 2025 report, which noted over 129,000 labor hours invested with zero major interruptions to the City’s water service. By blending specialized technical expertise in fusible PVC with proactive project management, MH Civil ensured that Greenville is positioned for long-term growth with a resilient, high-capacity water transmission system.
