Nordre Puttjern is a lake located west of PuttÃÂ¥sen in the northern part of ÃÂstmarka in Oslo municipality, Norway.
Together with Søndre Puttjern lake right nearby, it was almost entirely dried up in 1997 due to a leak during the construction of the railway tunnel Romeriksporten. The water level in Nordre Puttjern dropped 6 metres, so that the depth was reduced from 9 to 3 metres.