The project: route, construction sites and safety

Europe's largest water infrastructure project, designed to ensure the long-term security and continuity of water supply for Rome and the Lazio region.

3D model of the Peschiera Aqueduct 3D model of the Peschiera Aqueduct

An advanced example of integrated planning combining the needs of the local area, environmental sustainability and infrastructure resilience.

An investment for the future of our communities



The municipalities involved and the aqueduct route.

Construction activities will involve the municipalities of Castel Sant’Angelo, Cittaducale, Belmonte in Sabina, Mompeo, Montenero Sabina, Monte San Giovanni in Sabina, Rieti and Salisano.

The three scheduled stages of the Peschiera project: contract award in June 2026, detailed design from July 2026 to June 2027, and start of construction in June 2027.

From the heart of the Apennines: the water that reaches Rome


The New Peschiera Aqueduct safeguards the existing water system, ensuring service continuity and greater reliability. The route runs entirely underground to minimise surface impact.

The project in numbers

An unprecedented engineering challenge in scale and capacity.

27 km

Total length of the new route connecting the springs to the distribution hub 

10 m³/s

Guaranteed flow rate, capable of meeting the needs of millions of people

8 m

Maximum tunnel diameter, enabling easy maintenance and inspection using dedicated vehicles

2.7 M

kWh/year, estimated energy savings

Safety and legality front and centre


We are building resilient and reliable infrastructure.

The project is not only an engineering undertaking, but also a pact of trust with the local area and institutions.

Seismic resilience
The entire route is designed to withstand severe seismic events, ensuring the continuous availability of water, even in an emergency.


Legality protocol
Signed with the Prefecture for anti-mafia monitoring and workplace safety across all construction sites.

Acea technician wearing a safety helmet and high-visibility clothing tying iron bars

Responsible construction sites

Our construction sites are designed to minimise disruption. We use mechanised excavation techniques with tunnel boring machines (TBMs) operating at depth, limiting dust, noise and surface traffic.
 

  • Logistics and traffic management: Detailed plans to minimise disruption to residents in the municipalities crossed by the route.

  • Environmental monitoring: Monitoring stations to track air, water and soil conditions around the construction sites.

Find out more about the project


Learn how we are building the future of water.

Frequently Asked Questions about the project

 

We answer the most frequently asked questions about the New Upper Section of the Peschiera Aqueduct: route, municipalities along the route, construction site management, timeline, and the expected investment.