Abstract: An apparatus for locking an enclosure cover, such as a manhole cover or enclosure lid, in seated engagement on its enclosure frame, includes a lock housing positioned within a lock aperture extending perpendicularly through the top surface of the enclosure cover. A reciprocating, manual throw bolt is inserted within an aperture extending laterally within the enclosure cover between the lock aperture and the side of the enclosure cover for releasable engagement into a receiving aperture within the enclosure frame. When inserted, the lock housing maintains the manual throw bolt in locking engagement with the enclosure frame. The lock housing includes a cylinder cam lock for releasably locking the lock housing in place within the lock aperture. The cylinder cam lock uses conventional keys that can be mastered or zoned. The locking apparatus can be retrofit into existing enclosure covers or included during initial manufacture of such covers.

Abstract: Systems and methods for restricting access to infrastructure components are provided. In this regard, a representative system includes: a lock assembly having a receptacle, a sleeve, a fastener and a cap; the receptacle having a longitudinal bore; the sleeve defining an interior and having a first end, an opposing second end, and an interior flange positioned between the first end and the second end; the fastener having a shaft extending from a head, the shaft being sized and shaped to engage within the longitudinal bore of the receptacle, the head being sized and shaped to prevent passage of the fastener through the sleeve via interference with the first flange; the cap being operative to engage the second end of the sleeve such that, in an engaged position, the cap and the sleeve retain the head of the bolt within the interior of the sleeve; the lock assembly being operative to selectively secure the lid to the housing.