The Minister for Development, Magdalena Álvarez, attended the breakthrough or end of the boring of the second of the tubes in the La Cabrera runnel on 25 September. The tunnel is located in the Siete Aguas-Buñol section of the future Madrid-Castile La Mancha-Valencian Region- Murcia Region high speed railway line and was built by CC Construcción and Sando in a temporary joint venture for ADIF.

The 7,250 m La Cabrera tunnel is the longest on the 914 km that make up this high speed line. It is located in the Sierra de la Cabrera in the section between the municipalities of Siete Aguas and Buñol in the province of Valencia.

The channel consists of two circular tubes 8.75 m inside diameter excavated in carbonate rock (limestone, Dolomites, limestone marls, etc). The boring of the left tunnel ended last April, after which it was necessary to disassemble the tunnel boring machine and install it In the second tube to start excavation, on 6 May this year.

Seven world excavation records:
During the approximately 10 months of excavation, the world record for daily boring progress using a tunnel boring machine was broken seven times:

- 27-09-07: the world record was broken with 65.6 m excavated and 41 concrete rings installed in one-day. Each ring consists of seven prefabricated segments joined together.
- 01-10-07: new world record of 67.2 m excavated and 42 concrete rings installed in one day.
- 19-11-07: new world record of 72.0 m excavated and 45 concrete rings installed.
- 25-11-07: new world record with 80 m excavated and 50 concrete rings installed.
- 01-12-07: new world record with 83.2 m excavated and 52 concrete rings installed.
- 08-06-08: new world record with 89.6 m excavated and 56 concrete rings installed.
- 01-08-08: new world record with 92.8 m excavated and 58 concrete rings installed.

Other maximum efforts obtained achieved were a progress of 48 m in 12 hours (01-08-08), a progress of 462.40 m per week (01-08-08) and a maximum in the last 30 days of 1,864 m (09-08-08).