16 U.S. Code § 460hhh–6 - Withdrawal
(a) In general
Subject to valid existing rights and except for lands described in subsection (b) of this section, all Federal lands within the Recreation Area are withdrawn from—
The lands referred to in subsection (a) of this section are described as follows:
W1/2E1/2 and W1/2, Sec. 27, T23S, R58E, Mt. Diablo Meridian.