Mass burials of the executed on the outskirts of Vladivostok at the Sedanka Pass were well-known to local historians and members of the Memorial Society. From the early 1990s onwards, they made fruitless attempts to reach agreement with the  authorities to carry out exploratory work there. In 1991, a memorial with a commemorative plaque was installed thanks to the efforts of Memorial. (The plaque reads, “To those tormented and shot during the years of [[Stalinist]] repression, 1920-1950, from the inhabitants of the Primorsky Krai …” The word ‘Stalinist’ was later erased.)

Only when work began late in 2009 on the Sedanka-Patrokl Highway were human remains found in large quantities. These were reburied the following year in the Lesnoe Cemetery [25-02]. Historians believe that several thousand executed victims may have been buried at the Sedankinsky Heights.