»Water supply networks in old city centres are often over 50 years old and no longer efficient due to heavy incrustation. We recalculated the entire water supply network, checked the pressure conditions and the extinguishing water supply.«
Lothar Schellhaas
In urban centres, the sewer system has not kept pace with the urban growth in population and buildings and cannot withstand heavy rainfall events. We plan the combined sewer renewal in trench depths of up to 6 metres using the open trench method in confined spaces.
In urban centres, the sewer system has not kept pace with the urban growth in population and buildings and cannot withstand heavy rainfall events. We plan the combined sewer renewal in trench depths of up to 6 metres using the open trench method in confined spaces.
We are experts in all specialist areas. The focus is on water supply systems, waste water disposal systems, transport systems and hydraulic engineering.
We provide engineering services in consulting, planning and construction control.
»Increasingly frequent heavy rainfall events jeopardise low-lying locations. In an overall planning concept with an NA model, we developed specific solutions for the local situation in a team of experts – from floating debris traps in the forest to intake structures.«
Vincent Kallis
»Increasingly frequent heavy rainfall events jeopardise low-lying locations. In an overall planning concept with an NA model, we developed specific solutions for the local situation in a team of experts – from floating debris traps in the forest to intake structures.«
Vincent Kallis
»Inner-city development of a plot of land in a central city location in Frankfurt a.M. for an American property company. Coordination and harmonisation of the complex measures with all municipal bodies and management companies.«
Frank Lanfermann
»Inner-city development of a plot of land in a central city location in Frankfurt a.M. for an American property company. Coordination and harmonisation of the complex measures with all municipal bodies and management companies.«
Frank Lanfermann
The clients of Ingenieurbüro Ohlsen GmbH include public sector clients from local authorities to the federal government, corporate clients from industry, property developers and international project companies.
»9 months of planning. 20 months of construction: Fundamental expansion and redesign of road, sewer, green area, traffic lights over a length of 1.7 km. Our overall planning engineering service involved the complex coordination of all parties involved.«
Katrin Jäger
»9 months of planning. 20 months of construction: Fundamental expansion and redesign of road, sewer, green area, traffic lights over a length of 1.7 km. Our overall planning engineering service involved the complex coordination of all parties involved.«
Katrin Jäger
»9 months of planning. 20 months of construction: Fundamental expansion and redesign of road, sewer, green area, traffic lights over a length of 1.7 km. Our overall planning engineering service involved the complex coordination of all parties involved.«
Katrin Jäger
The sewers, sintered by the water from the healing spring, needed to be upgraded without trenches using robot rehabilitation and inliner methods in large underground supply cellars.
With strict requirements for the protection of historical monuments and medicinal springs.
The sewers, sintered by the water from the healing spring, needed to be upgraded without trenches using robot rehabilitation and inliner methods in large underground supply cellars.
With strict requirements for the protection of historical monuments and medicinal springs.
The sewers, sintered by the water from the healing spring, needed to be upgraded without trenches using robot rehabilitation and inliner methods in large underground supply cellars.
With strict requirements for the protection of historical monuments and medicinal springs.
We go deep – and shape the future with sustainable results.
We engineers are do-gooders: What we do must make the world a better place.
For you and for all of us: as citizens, customers and people.
The 35-hectare industrial estate was developed in three sections using a separation system with an open rainwater retention basin. We planned the civil engineering structures, traffic systems and coordinated all utility providers. The waste water pipe had to be redesigned and relocated below the railway line.
The 35-hectare industrial estate was developed in three sections using a separation system with an open rainwater retention basin. We planned the civil engineering structures, traffic systems and coordinated all utility providers. The waste water pipe had to be redesigned and relocated below the railway line.
The 35-hectare industrial estate was developed in three sections using a separation system with an open rainwater retention basin. We planned the civil engineering structures, traffic systems and coordinated all utility providers. The waste water pipe had to be redesigned and relocated below the railway line.
Ingenieurbüro Ohlsen GmbH is a planning office for infrastructure.
We specialise in the most relevant of our technical infrastructures:
Water | Waste water | Road
