Within the Special Stapleton Waterfront District, the underlying height and setback regulations shall be modified as follows:

(a)        Subareas A and B1

(1)        Base heights and maximum building heights

The table below sets forth the minimum and maximum base height, the maximum transition height, the maximum height of a building or other structure, and the maximum number of stories for buildings in Subareas A and B1. The maximum building height set forth in the table shall only be permitted in locations where the maximum street wall width of a building above the transition height, or, where applicable, the maximum base height, does not exceed 100 feet. At least 60 feet of separation shall exist between any portions of buildings located above such maximum transition height, or maximum base height, as applicable.

A setback is required for all portions of buildings or other structures that exceed the maximum base height specified for the Subarea, and shall be provided in accordance with paragraph (a)(2) of this Section.

Maximum Base Heights and Maximum Building Heights for Subareas A and B1

(2)        Required setbacks

At a height not lower than the minimum base height, or higher than the maximum base height specified for the Subarea in the table in paragraph (a)(1) of this Section, a setback with a depth of at least 10 feet shall be provided from the front building wall.

In addition, the underlying provisions of paragraphs (c)(2) through (c)(4) of Section 23-662 (Maximum height of buildings and setback regulations) shall apply to such setbacks.

(3)        Dormer provisions

The underlying dormer provisions of paragraph (c) of Section 23-623 (Permitted obstructions in certain districts) shall apply, except that no dormer shall be permitted above a height of 85 feet, or above the maximum height of the building or other structure permitted in paragraph (a) of this Section, whichever is lower.

(b)        Subarea B2

Within Subarea B2, the maximum height of a building or other structure shall not exceed 60 feet.

(c)        Subareas B3 through B5 and Subarea C

In Subareas B3 through B5 and Subarea C the minimum base height shall be 35 feet and the maximum base height shall be 40 feet. At a height not lower than the minimum base height or higher than the maximum base height, a setback with a depth of at least 10 feet shall be provided, as measured from the front building wall.

The maximum height of a building or other structure shall not exceed 50 feet. However, where the ground floor level of a building provides a qualifying ground floor in accordance with the supplemental provisions set forth in paragraph (b)(2) of Section 35-652 (Maximum height of buildings and setback regulations), the maximum height of a building or other structure may be increased to 55 feet.