Engineering Services

Oversees the Capital Planning, Construction Administration, Water Design and Wastewater/Storm Drain Design sections. Administration is responsible for planning, organizing, and directing the activities of the Engineering Services Division to ensure that projects are coordinated and implemented to meet the needs of the community. It is also responsible for long-range utility plans and goals, establishing utility rates, developing and maintaining regional partnerships and strategic initiatives, forecasting funding needs, and administering approved budgets.

Capital Planning is responsible for strategic planning functions to ensure that master plans and financing mechanisms are in place to maintain existing water, sewer and storm drainage systems and to expand system infrastructure for the future.

Engineering Design is responsible for preparing plans and specifications for various Water and Wastewater CIP projects and put projects out for competitive bids. They also negotiate agreements for the acquisition and purchase of real property for the City, secure right-of-way, easements and leases and manage real property owned by the City.

Construction Administration is responsible for the management of public facility projects built under city contracts, improvements built in the public right-of-way, and performing land surveying work for City projects.


Project Highlights


Emerald Lift Station Rehabilitation


The Emerald Lift Station is one of the four major sewer lift stations within the City, and is located south of 307 N. Emerald Avenue. This lift station has experienced severe corrosion and the stairway and pump access floor grates pose safety hazards to City Operation’s staff.

This project was awarded to Aztec Consultants of San Ramon, California on August 9, 2013, and construction is expected to be complete by early 2015. The improvements include replacing the existing pumping equipment, installing new pipe gallery, new wet pit and new electrical controls. This project is funded through the Wastewater Fund.


Emerald Sewer Trunk Relief


The Emerald Sewer Trunk is approximately five miles long and ranges in diameter from 21-inches north of Highway 99 to 42-inches near the West Trunk. Currently, this Trunk conveys 13 percent of the City’s wastewater flows and lacks sufficient hydraulic capacity during peak wet weather flows, presenting the risk of surcharging and sewer overflows. Previously referred to as the Carpenter Road Sewer Relief project, this project was identified as one of the three highest priority projects. During design an alternative alignment was selected and referred to as the Emerald Sewer Relief Trunk. This alternative alignment was deemed the most cost-effective project because it reduced the size and length of the relief sewer trunk, avoided and/or minimized construction conflicts, and had the shortest construction schedule. This alternative alignment resulted in a combined savings of $7.5 million.

The Emerald Trunk Sewer Relief Project was awarded to McGuire Hester of Oakland, California on February 2, 2014, and construction began spring 2014 and is expected to be complete by the end of 2014. The project consists of installing 1.75 miles of 36-inch and 30-inch pipelines along Emerald Avenue and Elm Avenue to the West Trunk, located along Nebraska Avenue. This project is funded through the Wastewater Fund.


Area 2 Storm Drain Cross Connect Removal - Phase 1 Garrison Park


The Area 2 Storm Drain Cross Connection Removal Project – Phase I Garrison Park is the first of four phases of cross connection removal projects in the City of Modesto. Phase I Garrison Park proposes to remove three storm drain connections from existing sanitary sewers, and twenty failed rock wells.

Currently, the cross-connections provide storm water drainage for residents and businesses within a 24-acre area generally bounded by Carver Road and Del Vale Avenue from Teresa Street to Roseburg Avenue. These cross connections capture excess storm water, but increase the volume of wet weather flows in the sanitary sewer collection system and wastewater treatment plants. These increased wet weather flows adversely impact the wastewater system capacity, and significantly increase the risk of potential overflows. The removal of these three cross connections will remove an estimated maximum of 800,000 gallons per day. These improvements are in accordance with the 2007 Wastewater Master Plan’s recommendation to improve capacity of impacted sewer lines throughout the City.

The re-routed storm water runoff will be conveyed through storm drain pipes to Garrison Park where it will be stored in an underground storage system. This underground storage system will be the largest of its kind in California. Storm water will be pre-treated to remove trash, sediment, oil, grease, and other substances prior to infiltration and eventual recharge of groundwater.

The project was awarded to Mountain Cascade, Inc. of Livermore, California on November 6, 2013, and construction began in spring 2014 and is expected to be complete fall 2014. The construction is affecting approximately one acre of Garrison Park land, closing the baseball field while the rest of the park is open.

Upon completion of the underground retention storage facilities, the park will be restored with:

  • Low Impact Development (LID) features and components such as pervious concrete to keep storm water at its source, providing water quality treatment, infiltrating storm water, and recharging the groundwater aquifer
  • A new baseball field, turf, and irrigation system
  • Two new half-court basketball courts, along with a drinking fountain and benches

The project also benefits residents in the surrounding community by reducing localized street flooding and restoring a local City park where the storm runoff volume will be stored underground.

The majority of the construction of this project is funded by a $3 million grant from the Proposition 84 Storm Water Grant Fund. Proposition 84, the Safe Drinking Water, Water Quality and Supply, Flood Control, River and Coastal Protection Bond Act of 2006 (SWGP), provided the State Water Board $90 million for matching grants to local public agencies.


Contact Us

Engineering Services
1010 10th Street
Modesto, CA 95354


(209) 577-5462 phone
(209) 522-1780 fax