  A possibility to accelerate a high intensity polarized proton beam up to 70
GeV at the IHEP accelerator, extract it from the main ring and deliver to
several experimental setups is being studied now. We propose to study a wealth
of single- and double-spin observables in various reactions using
longitudinally and transverserly polarized proton beams at U70. The proposed
measurements can be done at the existing detectors as well as require to create
a few new experimental setups at U70.
