At Romtec Utilities we have designed and supplied many wastewater lift station projects for the City of Shafter in California. We have partnered with the city on a variety of wastewater lift station projects over time, to help upgrade their infrastructure and meet their development demands as they’ve grown.

There have been a variety of project types from residential developments, a Shafter City Hall system, a replacement system at a city park, a sewer lift station replacement, and a sewer expansion lift station.

Shafter, California is a city of about 17,000 people located 18 miles northwest of Bakersfield, California.

For the Shafter City Hall project, this wastewater lift station provides pumping for the city hall along with other infrastructure in the area. The City of Shafter preferred to work with Romtec Utilities to ensure the system was a quality design. We had worked with the City of Shafter before on other pump systems and although they don’t have a basis of design, they wanted to work closely with us on the design process knowing they would get a quality system for this project.

The City of Shafter contacted Romtec Utilities to provide a new wastewater lift station for a combined Shafter Caltrans project. The City of Shafter wanted a sewer pumping system that met their standards and is operated and maintained by the city.

The City of Shafter originally owned the property, then had a developer come in to purchase it which now requires the use of a lift station. The lift station was intended for a different location but was relocated onto state highway easement when the property sold which is why Caltrans was also involved in the project.

The civil installing contractor on behalf of the City of Shafter was SW Construction.

The basis of design was previous lift stations provided to the City of Shafter as well as specific changes and comments provided by the city. The city provided engineering in-house and were the engineer, reviewer, and owner for this wastewater lift station.

The municipal wastewater lift station features duplex 5HP Flygt pumps, 577 valve vault, with a primary level sensor pressure transducer, 4” discharge piping, 10 pt. Probe for backup level sensing, stainless steel guiderails, and wet well.

The wastewater lift station can pump up to 276 gallons per minute with a 25.7 total dynamic head. We designed the wastewater lift station to fit the needs of this multi-use development, located on State Route 43.

Romtec Utilities designed and supplied a new lift station to meet current and future sewage flows from a large residential development in Shafter, California. The initial system design uses 7.5 hp Xylem pumps in a triplex configuration to meet the flow from the first phase of the development.

When the development is complete, the peak inflow to the system is anticipated to be over 2,000 gpm of wastewater. A 30,000 gallon fiberglass overflow tank was installed for temporary storage to mitigate the discharge of sewage to the downstream water treatment plant. Romtec Utilities also provided a new control building where electrical controls for the lift station and the chemical feed odor control system could be safely located.

Gossamer Grove is the largest housing development in the City of Shafter. Romtec Utilities provided the wastewater lift station for this development after establishing a standard lift station configuration with the City on previous projects. This project presented unique design challenges due to the increasing flow requirements as Lennar, the developer, continued to build houses through multiple phases.

We worked with Quad Knopf, the engineer, to design this lift station in two phases. The first phase handles the initial flow requirements, but it can handle future flow requirements through simple upgrades. Once the design was finalized and approved Brown Contractors installed the lift station.

This project exemplifies the best practices for a growing city to implement to work through current and future growth with its sewer infrastructure.

Romtec Utilities designed and supplied a wastewater lift station to replace an existing system located in Rodriguez Park in Shafter.

The lift station handles high flows of wastewater with a duplex configuration of Flygt 5 hp submersible pumps. To reduce the number of pump-starts per hour, Romtec Utilities designed this lift station using a 23’ deep wet well with a 6’ interior diameter. Primary and backup level sensing in the system is achieved using a pair of Multitrode 10 sensor probes. These grant a high level of reliability without the need for moving parts.

The new system was needed to handle growing flows from the area while modernizing the infrastructure. Romtec Utilities has completed several projects with the City of Shafter and was familiar with their design preferences and using this information designed the new system with Flygt pumps and controls.

The city provided the necessary information to Romtec Utilities to design the lift station for this specific application. Sierra Contractor’s performed the installation of the pumping system with a Romtec Utilities construction advisor available onsite to answer any questions.

When the City of Shafter needed to replace another aging sewer lift station, it contacted Romtec Utilities for the design of the replacement. They needed a new sewer lift station to replace an existing system with out-of-date components. Additionally, the site for the existing lift station had size limitations that restricted to a certain style of construction to install the new lift station.

Romtec Utilities worked with the City and its contractor, Sierra Construction Inc., to engineer the system so that it could be installed within the site restrictions. Sierra Construction used a modified culvert pipe to create shoring that mimicked a caisson style of construction.

The new system includes 3 hp Flygt pumps in a duplex configuration for pump cycling and redundancy. The underground wet well and valve vault were fabricated with precast concrete and included preassembly for easy on-site installation and precast pedestrian rated hatches. A pressure transducer serves as the primary level-sensing device with a probe providing emergency backup. Electrical controls comprise a PLC controller, and

auto dialer for telemetry, and a NEMA 3R enclosure with painted steel for outdoor weather protection.

The sewer lift station replacement can pump up to 350 gallons with a 19.6 total dynamic head. A 577 valve vault was also used in this system, which is a vault Romtec Utilities manufactures at our facility and send to the site with all the valves and piping installed ready to be put into place next to the wet well. We do this to help save time and money on the installation but also this ensures a high level of quality and control. Customers enjoy savings on time, cost to install, and equipment needed to install it.

This package lift station is part of a sustained plan to expand the collection system of a large sewage treatment plant completed in 1999. The medium flow is handled by submersible solids handling pumps in a duplex configuration.

A pigging port, plug valve, shut off valve, mechanical indicator, back flow actuator, and swing check valve are all contained in a below-grade valve vault. An outdoor control panel includes an autodialer for communications, conductive probes for level sensing, and an intrinsically safe barrier for in-well electrical controls.

The City of Shafter operates several Romtec Utilities lift stations that were acquired through Romtec Utilities’ California State Contract. For the City, the typical Romtec Utilities design practices have become the standard for lift station configurations.

Through Romtec Utilities’ state contract, the city can purchase affordable packaged lift stations without having to take the project out to bid, saving time, money, and effort. Romtec Utilities also worked with the installing contractor, Sierra Construction, by providing an on-site construction advisor to ensure fast and trouble-free installation.

This municipal sewer expansion lift station can pump up to 110 gallons per minute with Flygt pumps.

These various projects show the different kinds of pump station projects that a city has needs for including residential developments, mixed use, sewer lift station replacement, and sewer expansion.