The missile division in Kozelsk, which included 60 UR-100NUTTH (SS-19) missiles, is being liquidated. According to a report that quotes a representative of the division, the missiles are being moved to the division storage site (RTB) and it is expected that all missiles will be removed from service by the end of 2007. [UPDATE 09/11/07: It appears that only one regiment will be removed from service this year.]
The UR-100NUTTH missile is a silo-based liquid-fuel missile that carries six 400 kt warheads. The UTTH modification of the missile has greater accuracy than its predecessor, UR-100N, deployed in mid-1970s. Flight tests of UR-100NUTTH were conducted in 1977-1979 and deployment began in 1979. In 1985, at the peak of deployment, the Soviet Union had 360 UR-100NUTTH missiles, which completely replaced previously deployed UR-100N (190 of which had been deployed by 1979; all these missiles were removed from service by 1983). There were reports about a single-warhead modification of UR-100NUTTH, but it appears that it was never operationally deployed.
The breakup of the Soviet Union left Russia with 170 UR-100NUTTH missiles deployed in Kozelsk and Tatishchevo (60 and 110 missiles respectively). 130 missiles remained at two bases in Ukraine - in Pervomaysk (40) and Khmelnitskiy (90). By that time the Rocket Forces were in the process of replacing some of UR-100NUTTH missiles in silos at Tatishchevo and Pervomaysk with the silo-based version of RT-23UTTH (SS-24) missile.
Ukraine, in addition to the missiles that were deployed there (and which had been eliminated by the end of 1990s) had about 30 UR-100NUTTH missiles in storage. These "dry" missiles were transferred to Russia in 2002-2004 (the information about the actual number of missiles involved is somewhat contradictory). At some point in 2005, the Rocket Forces stated their intent to deploy these missiles, which could be kept in service until about 2020-2030. It is not clear if these plans have been reconsidered - Russia may still have an option of deploying them in Tatishchevo (only 20 of the currently available 60+ UR-100NUTTH silos are expected to be taken by silo-based Topol-M by 2015).
Although Russia's current missile development plans are focused on solid-propellant missiles - Topol-M (including its MIRVed RS-24 version) ICBM and Bulava SLBM, plans to develop new-generation liquid-fuel missile still exist. Gerbert Efremov, the General Designer of NPO Mashinostroyeniya, the developer of UR-100N family of missiles, argues that Russia needs to build a "new powerful liquid-fuel missile, with a launch mass of about 100 tonnes" (the launch mass of UR-100NUTTH is about 106 tonnes), which would be deployed after 2015 in about 100 silos currently occupied by R-36MUTTH/R-36M2 (SS-18) missiles. It appears that this plan does not have support of the current Russian leadership, but at the same time the issue is still being discussed. Yuri Solomonov, the General Designer of the Moscow Institute of Thermal Technology, in a recent interview mentioned his strong opposition to the plan (see also earlier signs of the controversy).