Coming from Sary-Yaz, the second bridge was missing in Sept. 2017.
It should be possible to stay on the north shore of the Karavshin river (do _not_ cross at the first bridge).
Batken Travel was asking for 100USD for a 4WD to Sary-Yaz (up to 4 People)
Locals are very friendly and brought me back to the main road.
Because Vorukh is a tadjik enclave in Kyrgyzsan it is not easyly possible to enter the Karavshin valley from the east. That'S why it's necessary to go to Sary-Yaz (2600m) walk over a 2920m pass and drop 1300m to the Karavshin river (1600m).