The works designed within the contract include the rehabilitation of the Isvarna water intake (the largest surface spring in Romania), as well as the rehabilitation and extension of the existing Isvarna water supply pipeline, Line II, over a total length of 20,505 m.

The design works within the contract included the following categories of works:

• Rehabilitation of the intake chamber, including overflow management at the Isvarna intake, to increase the captured flow to Q=1400 l/s;
• Rehabilitation of the administrative building, including the automation and control room;
• New chlorination station for a flow rate of 922 l/s;
• Loading chamber for the Isvarna Line II pipeline;
• Flow meter chambers;
• Landscaping works, internal systematization, internal roads and parking, fencing of the sanitary protection zone.

The rehabilitation and extension of the Isvarna water supply pipeline, Line II, over a length of 20,505 m, includes:

• New water supply pipeline, PAFSIN DN1200 mm, SN10000 PN6 bar, over a length of 16,095 m, including valve chambers, draining, venting, etc.;
• Pipeline to be rehabilitated using the relining method, by inserting a DN1050 mm PAFSIN pipe SN5000 PN6 bar (special manufacturing) into the existing PREMO DN1200 mm water supply pipeline, over a total length of 3,700 m. In areas where relining is not possible, the existing pipeline will be rehabilitated using the CIPP method (Cured In Place Pipes);
• Existing PREMO DN1200 mm water supply pipeline, to be rehabilitated using the Cured In Place Pipes method, over a total length of 710 m.