Adjustable manhole apparatus

An adjustable manhole apparatus, comprising:

• a) a manhole extension including an upper surface with an opening therein;
• b) a frame, directly disposed on the manhole extension and rotatable with respect thereto, including:
• 1) a bottom edge, designed to be rotatably disposed on the manhole extension;
• 2) a flange, extending outwardly from the bottom edge and abutting the upper surface of the manhole extension to support the frame on the manhole extension;
• 3) an annular protrusion, extending vertically downwardly from the bottom edge and extending into the opening of the manhole extension to resist lateral movement of the frame with respect to the manhole extension;
• 4) an angled top edge, forming an angle between approximately two to ten degrees with the bottom edge;
• 5) a shoulder, formed at the angled top edge;
• and
• 6) a vertical wall, surrounding the shoulder;
• c) a single rotatable ring, rotatably disposed on the base ring, having:
• 1) a bottom edge, designed to be rotatably disposed on the shoulder of, and between the vertical wall of, the angled top edge of the frame;
• and
• 2) a angled top edge, forming an angle between approximately two to ten degrees from the bottom edge of the rotatable ring;
• 3) a shoulder, formed at the angled top edge of the rotatable ring;
• and
• 4) a vertical wall, surrounding the shoulder of the rotatable ring;
• and
• d) a cover, removably disposed directly on the shoulder of, and between the vertical wall of, the rotatably ring, to cover access to the manhole extension.