Abstract: The invention is a monitoring well cover with a generally planar lid, a generally cylindrical rim, and one or more generally cylindrical skirts. The lid has threads on its side to secure the lid to the rim. The rim has an L-shaped upper edge for receiving and sealing tightly with the lid and has snaps positioned around its lower edge for receiving and sealing tightly with one of the skirts. The skirts each having flanges positioned around their upper ends and snaps positioned around their lower ends such that the first of the skirts may seal tightly with the rim and each subsequent skirt may seal tightly with the skirt preceding it. The lid, the rim, and the skirt are all constructed from a fiber reinforced, heat stabilized, high strength thermoplastic.

Abstract: The present invention provides for a key and bolt lock device. The key is constructed in a housing shell to be received by the head of the bolt. The key includes a power source, typically a battery, and a transmit coil which is capable of transmitting both energy and data from the key to a receiving coil in the bolt. This energy and data transfer is usually conducted by magnetic coupling. The key also includes a memory device for storing security codes which are used to compare to security codes stored in the bolt as well as a device for retrieving and transmitting the security code, typically an 8-bit microcontroller. The bolt has a body which is operatively associated with a head of the bolt so that the head rotates on the body when the bolt is in a locked position. The bolt also includes a latching device which is capable of attaching the head of the bolt to the body of the bolt so that the head and body may be rotated together.