2015/2016 Project Award Winners

12th Street Improvements/Stormwater Enhancement Project - Sustainable Engineering Project

The City of Paso Robles has worked tirelessly to act as a leader in the area of green infrastructure development. The City of Paso Robles desired to redesign 12th Street to reduce future pavement maintenance costs, improve pedestrian mobility, reduce stormwater flooding, and increase groundwater recharge. 

The new 12th Street Green Street incorporates specially engineered landscapes, called bioretention planters, to manage stormwater runoff.  

Other stormwater management features built into the 12th Street corridor include underground infiltration structures called dry wells and permeable paver surfaces. When it rains, stormwater flows along 12th Street will be reduced as water is diverted into the dry wells and infiltrated down into the ground.

This project allowed the City of Paso Robles to further expose the community at large to the benefits of sustainable and accessible street infrastructure by implementing the Green and Complete Street features into this enhancement project. 

The City of Paso Robles has made it a strategy to incorporate LID design elements into prioritized infrastructure improvement projects. By doing so, they have succeeded in capturing grant funds, reducing stormwater runoff impacts to the Salinas River, and recharging their groundwater all while maximizing infrastructure investment dollars and enhancing the quality of life for residents. 

Through the 12th Street Improvements, the City has improved not only water quality and water resources, but the way that public engages with the streetscape as well.

Project Team: City of Paso Robles & Cannon 
Contractor: Souza

Nipomo Supplemental Water Project - Water Project & Project of the Year

The Nipomo Supplemental Water Project (Project) is a $17.5 million public works construction project, supported by a $2.2 million State of California Department of Water Resources Grant. The Project facilitates interconnection of three regional water providers and the importation of developed water from the City of Santa Maria to the Nipomo Mesa Management Area (NMMA) in accordance with a court order. The Project increases Nipomo’s water resources and supply reliability for generations to come.

The Project interconnected the NCSD water distribution system with the City of Santa Maria water distribution system. It included approximately 7,500 lineal feet of 24-inch diameter ductile iron pipe (DIP) waterline, 2,600 lineal feet of 24-inch nominal inside diameter high-density polyethylene (HDPE) pipe under the Santa Maria River, a flow meter and flow control station, a 400 gallon per minute (gpm) pump station with two (2) pumps, a chloramination system, and related power, back-up power, controls and instrumentation systems, a pressure reducing station, and chloramination systems at five (5) existing NCSD production wells.

The Project is part of a long-term solution to help balance water supply and increase supply reliability. Future phases of the project will ultimately provide the capacity to deliver 3000 acre-feet of water per year to the NMMA. Delivery of Supplemental Water to the Nipomo Mesa commenced on July 2, 2015, and to date, over 500 AF of water has been delivered through the project facilities, reducing NCSD’s groundwater pumping within the NMMA by that same amount.

NCSD and MNS worked closely with several agencies to ensure minimal disruptions and strong communication throughout the project: 

The project was constructed within a highly sensitive environmental habitat, which required extensive environmentally-sensitive species surveys and monitoring and coordination with permitting agencies as well as surrounding farmland owners. 

Project Team:
    NCSD Staff 
    Design Engineer – AECOM 
    Construction Manager – MNS Engineers, Inc. 
    BP #1 – Santa Maria River Crossing, General Contractor ARB, Inc. 
    BP #3 – Blosser Road Waterline, General Contractor D-KAL Engineering, Inc. 
    BP #4 – Joshua Road Pump Station, General Contractor Spiess Construction Co., Inc.

DCPP Building 113 (Warehouse Bravo) - Structural Engineering Project

In response to the events at Fukushima, Diablo Canyon and other nuclear power plants around the globe are improving emergency response preparedness. While the majority of DCPP’s emergency equipment can be airlifted to the plant from a remote location, it is critical that the plant house required emergency equipment. Because of the coastal location and strict regulatory restrictions, the existing storage facility could not be removed and replaced with a new structure. In emergencies like a major earthquake, Diablo Canyon must have the ability to maintain plant stability with local resources for 48 hours following such an event.

This building has been declared a critical building, the level of design and detail is increased to ensure the spaces can remain operable after an earthquake, so the scope of this project included tenant improvements, including work associated with metal stud framing, stairs, operable partitions, suspended equipment and soffits, pad mounted equipment to accomplish the existing structure’s upgrade objectives and help safeguard the nuclear site in the event of seismic activity. Virtually every element in the structure was found to be deficient for the new design loads and were either replaced or modified to increase their capacity to current requirements. Several existing foundations required increased capacities through installation of piles and pile supported foundations were added for new moment frames.

This project was performed ahead of schedule and under budget, provided innovations in problem solving, and delivered quality workmanship. This project will prove to be a value to the area for years to come.

Project Team: Cannon, PG&E, and Fraser Seiple Architects


Los Osos Valley Road Interchange at US 101 - Transportation Project 

The project is the largest transportation project undertaken by the City, and was constructed at one of the busiest interchanges in the City. The area surrounding the project has auto dealerships, restaurants, retail shopping centers, light industrial, agriculture, residential, and highway services such as gas stations and hotels. Extensive public relations and outreach kept this active community informed throughout the duration of the project. In order to minimize the impact to the community, the project was constructed in seven different stages, including a 58-hour closure of the southbound on-ramp in order to construct a critical intersection. The project also required extensive field engineering to adjust for existing grade discrepancies as well as to better facilitate the flow of traffic throughout the various stages. 

In summary, this project involved cast-in-place (CIP) box girder bridges, retaining walls, soil nail walls, unique architectural features, hot mix asphalt (HMA) paving and Americans with Disabilities Act (ADA) ramps, significant earthwork and drainage, stage construction, traffic control and temporary signalization, extensive public outreach, sensitive permit requirements, coordination with Caltrans, lighting, ramp metering, and electrical.

The project, constructed within City and Caltrans right-of-way, was performed in accordance with applicable City and Caltrans standards, methods, and procedures, and was completed under the $24M total project budget, and two months ahead of schedule, unveiling the new interchange on March 29, 2016.

The project provides traffic relief in this bustling thoroughfare in the City of San Luis Obispo and complements the southern gateway into the City, creating a welcoming commute for residents and visitors alike.

Project Team:
City of SLO, MNS, Granite Construction, Dokken Engineering