document: Electrical facility construction work for information network structuring by the use of sewage conduits To confront the advent of the advanced information society , there has been a pressing demand for the adjustment of the communications infrastructure and the structuring of the information network by utilizing the sewage conduits . The City of Tokyo is promoting a project by the name of the sewer optical fiber teleway -LRB- SOFT -RRB- network plan . According to this plan , the total distance of the optical fiber network laid in the sewer conduits is scheduled to reach about 470 km by the end of March 2000 . At the final stage , this distance will reach 800 km as a whole . We completed the construction work for the information control facilities scattered in 11 places inclusive of the Treatment Site S , with the intention to adjust and extend the information transmission network laid through the above-mentioned optical fiber network , to be used exclusively by the Bureau of Sewerage . This construction work is described in the paper
doc_bio_tags: B I I I O B I I O O O O B I O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O B I O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O O O O O O O B I I O O O O O O O O O B I I O O O O O O O O O O O O O O B I I O O O O O O O O O