The railway between Uppsala and Lenna (old spelling of Länna) was opened in 1876 and was the first of all 891 mm (2 ft 11+3⁄32 in) railways in the region. It was built to serve the ironworks at Länna with a connection to the 1,435 mm (4 ft 8+1⁄2 in) standard gauge railroad network. The choice of gauge was somewhat of a compromise, 600 mm (1 ft 11+5⁄8 in) would have sufficed for the ore and steel traffic but with only a slight increase in budget allowed the greater capacity to carry passengers, mail and other goods. Two years later the Dannemora-Harg Railroad (DHJ), also 891 mm, started to operate in the north of the county. That railway was built to connect the mines in Dannemora with the harbor at Hargshamn. In 1884, ULJ was linked with the coast by the Lenna-Norrtelje Railroad (LNJ). The following year that line was connected through Rimbo with Stockholm by the Stockholm-Rimbo Railroad (SRJ). More information...
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