#EltelNetworksTeam was to reconstruct the existing 110 kV overhead power line over a section of approx. 24 km, which was built in the 1960s in the area with a large variety of terrain. There were hills, forests, large meadows to overcome, as well as new housing estates, gardens, cities, railway crossings, roads and other technical infrastructure. In addition, we worked in a very difficult period - the pandemic situation in the country and in the world as well as military operations beyond our eastern border affected the progress of work. The weather was also not our ally - frequent and heavy rainfall or snowfall was a big challenge during the execution works. However, the knowledge, experience and commitment of the entire team contributed to the successful completion of the project within the time required by the investor.
Katarzyna Dahlke
Project Director
Eltel Networks Energetyka SA
FACTS
Investor: Tauron Dystrybucja S.A.
Location: Wałbrzych, Boguszów, Podzamcze/Marciszów
Investment cost: 18,4 mln PLN
Completion: 2018 – 2022
LINE DETAILS
- 5 km of a double-circuit 110 kV overhead power line
- 21,5 km of a single-circuit 110 kV overhead power line
- 107 towers (105 lattice, 2 tubular)
- disassembly of 24 km of the depleted power line (133 towers in total)
- installation of vertical protection on 107 towers
CHALLENGE
The task of Eltel Networks was to prepare complete formal, legal and technical documentation, and then to reconstruct the 110 kV overhead power line S-220 R-Boguszów - R-Podzamcze and S-223 from R-Boguszów - R-Marciszów along with construction of fibre optic routes. Our responsibilities also included obtaining, on behalf of and for the benefit of the contracting authority, a permanent legal title to use the property on which the equipment currently owned by the investor is located (the so-called indefinite establishment of transmission easement on the property). As part of our work, we have performed:
- building design for the reconstruction of the 110 kV power line Boguszów – Podzamcze/Marciszów
- detailed design of the 110 kV power line Boguszów – Podzamcze/Marciszów (double-circuit section)
- detailed design of the 110 kV power line Boguszów - Podzamcze (single-circuit section)
- detailed design of the 110 kV power line Boguszów - Marciszów (single-circuit section)
- design and construction of the OPGW fibre optic route on the section of SE Boguszów - SE Podzamcze - SE Marciszów (~ 25.5 km)
- establishment of a transmission easement by notary public for the overhead power line
- conducting administrative and court proceedings
- obtaining a decision on determining the location of a public purpose investment
- obtaining an environmental decision for the power line route
- obtaining the right to dispose of real estate
- preparation of applications for notifications with attachments
- obtaining on behalf of and for Tauron Dystrybucja S.A. acceptance of the application for the reconstruction on the section of SE Boguszów - SE Podzamcze - SE Marciszów
- disassembly of the existing 110 kV power line, length ~29 km / route ~24 km
- assembly of foundations with earthing - 107 positions
- assembly of vertical safety systems on towers - 107 positions
- assembly of lattice towers - 105 pcs.
- assembly of tubular poles - 2 pcs.
- assembly of the AFL 10-240 mm2 cable with a route length of ~25.5 k
- assembly of composite insulation - 838 pcs.
- installation of phase, warning and numbering information tables
- measurements, research and geodetic services for the investment
During the implementation of the works, we had to face many challenges e.g.:
- disassembly and construction of an overhead power line in mountainous terrain, in difficult weather conditions (winter periods, low temperatures, snowmelt and mud)
- disassembly and construction of an overhead power line in densely urbanized areas
- crossing the following obstacles with the newly built 110 kV power line:
- constructed expressway S3
- important railway line
EFFECT
Having many years of experience, know-how and Eltel Networks full professionalism, we completed the reconstruction of the 110 kV overhead power line S-220 R-Boguszów - R-Podzamcze and S-223 from R-Boguszów - R-Marciszów along with the construction of fiber optic routes. Due to the diverse topography and changes in land use over the years, it was important to design the investment in such a way that its physical reconstruction would be done quickly and efficiently. We wanted the state after the reconstruction to be the least burdensome for the environment, people and the immediate vicinity. And we have 100% succeeded! The works were carried out fully in accordance with the investor's requirements, as evidenced by the final protocol of the project, approved without any defects.
Due to the very difficult weather conditions, winter period and difficult mountainous terrain, the completed task allowed us to consolidate our knowledge and practical experience, e.g. how to correctly estimate investment costs depending on the conditions at the construction site, how to act in constant cooperation with overhead line designers, if there is a sudden need to introduce changes.
Our work contributed to the improvement of the energy security of the Wałbrzych region, and thus ensured the continuity of operation and increased the transmission capacity of the National Energy System.
