The sewerage of Josefov
In the year of 1992 the main sewer II in Josefov caved in about 50 meters ahead of the flow in the river. Under the mound a great crater has developed and huge distruction of the sewer threatened. The Czech Speleological Society ZO 5-02 Albeřice carried out these demanding sewer repairs on commission and at the same time gave an impulse to a long-term systematic explorations and documented the present condition of the historical sewerage. Also the real run of the sewers into the town surficial plan is being monitored. At present the repairs of the sewerage system is being carried out by the Town Drainages and Sewerage Jaroměř s.r.o.. Our company is also helping out a lot.
The major part of the sewerage comes from 1780 - 1787, when the fortress was built, the rest of sewerage was finished later and in the times of the First Republic (1918 - 1939). The sewerage got damaged during the communist era, some of the sewers were destroyed and drainage pipes were put in instead, and drainage connections were very unsuitably used in the street drainages. At the moment almost 5,5 km of sewers have been mapped and the total length of the sewerage are about 8 km. The backbone is made of four main sewers (numbered with Roman numbers I., II., III. and IV.). They have or used to have their starting point at the south boundary of the fortress in the moat. The other end led into the river Metuje. Nowadays are the openings intercepted by a sludge collector and the sewage is led into a sewage plant. Only rain water is lead into the river. Also the other street drains lead into these main sewages. All these drains collect house sewage waste and rainwater from individual buildings, ie. from house drains, gutters and gullies.
By clicking the orange radio button in the plan you get to see a picture showing the current situation at the given spot. The picture disappears after another click.
The house drainages are not sketched in, the endings of the main sewers are outside the map. The pictures might not show the actual state as the sewers are being continuously repaired.
The street drains are arched, usually of size 800/1700 mm. Arches are made of so called "teresian" bricks. (Bricks from the ages of the Empress Maria Teresia). The walls are either made of well worked sandstone blocks or also the bricks. The floor is made of sandstone blocks, only in some places are the floors made of bricks. The drains were built in corrugation or were tunnelled through the rock massif. A huge feature is the lower level of the drainage system, which was built in a great depth underneath the stronghold mound. These are tunnelled through marlite, more commonly known as marl, and are without any brickwork. The house drainages leading underneath individual buildings are usually smaller and have flat ceilings made of sandstone blocks at some places. There are ingenious small rooms built in these sewers, to where the wastewater from all house floors was brought. Small reservoirs are in some house courtyards and the house drainages are actually starting from those. The reservoirs collect the rain water and rinse the drainages. The sewers in Josefov have many other specifics and make the only historical town sewer system, which remained preserved without hardly any changes and is fully functional even today.
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