Book 1 - City of St. Petersburg

is important to note that the Pier is approximately 50 years older
than the Inverted Pyramid and associated building foundations
(Moffatt & Nichol, 2010). Inspection of the caisson structures
supporting the Inverted Pyramid building will be conducted to
determine if the caissons are structurally suitable for use in the
proposed work. Additional information is provided in Appendix
L: City Pier Building Foundation Evaluation, March 1, 2010
(Moffatt & Nichol).
The landward connection of the existing Pier, from bents 1-21,
is composed of an underpinning of sand and grout that is
retained by a bulkhead. The grout has been placed into this
area in conjunction with the bulkhead maintenance and repair
program. This section of the existing Pier is scoped for selective
demolition and its southern section will become a connection
location for a walkway in the proposed Pier design. A thorough
investigation of this area is recommended in order to accurately
assess its condition and ability to meet the needs of the
proposed design.
Existing Bulkhead
The bulkhead, or seawall, is in fair to good condition in the
project area due to an ongoing inspection and repair program
undertaken by the City on an annual basis. The bulkhead in the
vicinity of the Pier is reportedly of “double wall” construction
and is not supported on piles. Various grouting and bulkhead
face repairs have taken place over the years under the north side
of the Pier; the bulkhead runs parallel to the Pier, separating it
from a public beach. In this area, the bulkhead is offset several
feet from the Pier, creating a walkway (off-limits to the public)
along the side of the Pier.
The bulkhead makes a 90 degree turn to run under the Pier
along bent 21, spanning the Pier pile caps--an important factor
when devising demolition strategies for the existing Pier.
MICHAEL MALTZAN ARCHITECTURE, INC. 3 - 55