To ensure a secure supply of energy, also when demand rises, means it is necessary for terranets bw to develop its gas transmission system, which is why terranets is planning the construction of the approx. 250 km long “Süddeutschen Erdgasleitung - SEL“ from Lampertheim in Hessen via Heidelberg, Heilbronn, Ludwigsburg, Esslingen, Göppingen, Heidenheim to Bissingen in Bavaria. Construction of the SEL will be implemented in sections depending on the specific development in demand in the next ten years.
By taking over the planning of SEL from OGE (Open Grid Europe), terranets bw has created the basis for efficient and sustainable network development.
approx. 250 km
Length of the “Süddeutsche Erdgasleitung“ from Lampertheim (Hessen ) – Bissingen (Bavaria)
|Nominal width |
(diameter of the pipeline)
|Protective strip |
(specially protected area around the pipeline where, for example, no buildings may be erected)
For constructing and operating SEL, terranets bw processes personal data. In particular, for acquiring and managing the rights of way and pipeline rights, terranets bw processes information on property owners and users affected by the pipeline route. Information on how terranets bw processes your personal data is available at www.terranets-bw.de/datenschutz.
Construction of SEL will be implemented in sections, depending on the specific development of demand in the next 10 years. Here you will find the current status of each section.
Implementation of this section of pipeline is to occur in two phases. By 2023 the network areas of terranets bw in Baden-Württemberg are to be connected to Hessen by building a gas pressure regulating and metering station and a roughly 500 m long section near Lampertheim (Heide / Lampertheimer Street). The remaining 8.5 km long pipeline section from Lampertheim to Viernheim and construction of a second gas pressure regulating and metering station are to be completed by 2026.
Public law approval has been granted for this section of the Süddeutsche Erdgasleitung with the planning approval decision of the Darmstadt Regional Council. The determined route, planned plot by plot, is being further pursued.
In preparation for construction, terranets bw will commence with acquiring the rights of way and pipeline rights from July 2021. Owners and farmers along the route will be contacted personally.
A detailed map showing the route (status: 06/2020) can be found here:
The approximately 15 km long pipeline section from Mannheim-Straßenheim via Heddesheim, Ladenburg, Dossenheim and Edingen-Neckarhausen to Heidelberg Grenzhof is expected to be completed by 2027.
The approximately 47 km pipeline section from Heidelberg Grenzhof via Leimen and Wiesloch to Hüffenhardt is expected to be completed by 2026.
A planning approval procedure for the route from Mannheim to Heidelberg in the administrative district of Karlsruhe is now being carried out.
terranets bw is currently at a very early stage of the planning and its planning will be based on the outcome of the regional planning procedure. In the regional planning procedure, the regional council assesses the fundamental regional compatibility of the project and recommends a route corridor. This route corridor forms the basis for the planning approval procedure where an application is submitted for the route, planned on a plot by plot basis. During the planning process, terranets bw aims to optimise the route on the basis of historical data, knowledge of further construction projects and the results of the planned early public participation prior to the planning approval procedure.
During the implementation phase of its projects, terranets bw places great importance on transparency and a close exchange of information. In preparation for the planning approval procedure, terranets bw is therefore planning a comprehensive early public participation in the communities within the administrative district of Karlsruhe in the second half of 2021.
The approximately 14 km long pipeline section from Siegelsbach via Bad Rappenau to Heilbronn is expected to be completed by 2026.
The approximately 24 km long pipeline section from Heilbronn via Leingarten, Nordheim, Lauffen a.N., Brackenheim, Kirchheim a.N., Bönnigheim and Erligheim to Löchgau is to be completed by 2024.
Acquisition of the rights of way and pipeline rights, together with the conclusion of public law agreements with owners and farmers commenced in the summer of 2020. From autumn 2020, comprehensive surveys have been taking place: land surveys, subsoil surveys and mapping of protected animals and plants as well as archaeological excavations that are expected to begin from 2022. Construction is to begin in 2023 and all pipes should be laid by the end of 2024 so that the pipeline can be used for transporting gas in the winter of 2024/ 2025.
A detailed map showing the route (status: 06/2020) can be found here:
The approximately 45 km long pipeline section from Löchgau via Ludwigsburg and Waiblingen to Esslingen a. N. is expected to be completed by 2026.
Approval under public law for the route has been granted with the planning approval decision of the Stuttgart Regional Council. The route, planned in detail plot by plot, is being further pursued.
The approximately 100 km long pipeline section from Esslingen a. N. via Göppingen, Geislingen a. d. Steige and Heidenheim a. d. Brenz to Bissingen (Bavaria) completes the connection to the upstream gas transmission system and is expected to be completed by 2032.
Approval under public law for the route has been granted with the planning permission decision of the Regional Council of Stuttgart. The route, planned in detail plot by plot, is being further pursued.
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Capacity demand for the terranets bw transmission system continues to grow. The distribution network operators and industrial customers connected to the terranets bw grid report a capacity demand for 2030 that is 30 % higher than the demand today. For the Energiewende to be successful and to guarantee a secure supply of energy despite the phase-out of coal, a reliable gas supply is needed. Gas-fired power stations that are required for system stability in the electricity grid, for example, can be supplied.
Since the reported demand exceeds the current, maximum shipping capacity of the terranets bw grid, the planned network development measure is necessary to continue to be able to guarantee a secure supply.
In order to use land/property for the construction of routes, pipeline rights in the form of licence agreements must be concluded with all landowners and farmers affected. A limited personal easement to be granted by the landowners secures this licence agreement in the land registry and the landowners receive a one-off payment. The amount of this payment depends, among other things, on the surface-area of the protective strip along the pipeline and its calculation is based on fixed compensation rates. terranets bw is also liable for any possible loss of income suffered by farmers or for any damages caused by works related to the laying of the pipeline.
The owner and contractor terranets bw guarantee the safety. The integrity and safety of the construction works are checked by independent technical experts (normally TÜV). The commissioning of skilled construction experts is performed according to a stringent prequalification. Safety and risk coordinators guarantee adherence to compliant working conditions on the construction site to prevent accidents.
Operation and maintenance works are carried out by skilled employees of terranets bw. The 2,000 km long transmission system and the associated technical systems belonging to terranets bw are monitored and controlled by the control centre, which is manned 24/7. The use of remotely controlled valves means that individual sections can be taken out of service immediately. In addition to regular maintenance and immediate implementation of necessary maintenance and repair works in accordance with technical regulations, the pipelines are regularly checked by flying over them, driving along them, walking along them and inspecting them.
The working strip, which is temporarily used during the construction phase, is 34 metres. The pipes have a diameter of 1.2 metres and are covered with at least 1 meter of soil, i.e. the trench is approx. 2.2 metres deep. After the pipes have been laid, the area used will be renaturalised so that agricultural use can be resumed without any restrictions.
Due to the construction of the pipeline, use of agricultural land will be temporarily needed for the working strip. The areas on both sides of the working strip can continue to be used during the construction phase. As far as possible, terranets bw minimises the impact on harvest times and, if necessary, provides compensation according to fixed rates. Following the land use by terranets bw, the ground is recultivated so that there are no significant restrictions on agricultural use.