Merrill Road Widening and Utilities Project

The Merrill Road Widening and Utilities project includes pavement reconstruction and widening of Merrill Road from 3000 East to Harvest Lane in a developing area of St. George, Utah. The project expands Merrill Road from two to five lanes, and along with it the below-ground stormwater drainage system and sanitary sewer utilities needed to support current and future traffic demands around the Paseo commercial development.

To support the project, NWPX Geneva supplied 2,400 LF of 54-inch Class III reinforced concrete pipe (RCP) for a dual 1,200-LF storm drain system. The dual line intersects five 14-by-7-foot precast vaults, also manufactured by NWPX Geneva. The project is a joint venture between the City of St. George, which oversees the stormwater conveyance portion, and the City of Washington, responsible for the wastewater portion, which includes five sanitary sewer manholes supplied by NWPX Geneva. The project was designed by Bowen Collins & Associates and installed by Suncore.

The 54-inch RCP was manufactured in 8-foot lengths at NWPX Geneva’s state-of-the-art Exact 2500 plant in Salt Lake City. The facility features a fully automated dry cast concrete production system capable of producing pipe and manhole risers with consistent quality and precision. This advanced technology streamlined production for the 300 pieces of RCP required, helping the team meet project timelines and ensuring on-time delivery to keep installation on schedule.

The precast storm drain vaults and sanitary sewer manholes were manufactured at NWPX Geneva’s precast plant in St. George, allowing key components to be produced locally for the project. The Southern Utah Geneva team coordinated closely with the Cities of St. George and Washington, the project engineer, and the general contractor to align production and delivery from both the St. George and Salt Lake City plants. This coordination ensured all stormwater and wastewater products met project specifications, arrived on schedule, and supported uninterrupted installation as work progressed along the corridor.

This project builds on progress made by the recently completed 3000 East Improvement Project to expand roadway and stormwater infrastructure. For previous phases of that project, NWPX Geneva supplied 3,145 LF of 10-by-6-foot reinforced concrete box culvert, 53 LF of 16-by-4-foot box culvert, and 2,440 LF of 96-inch RCP.