Book 1 - City of St. Petersburg

8. For coastal bridges, the vertical clearance of the
superstructure shall be a minimum of 1 ft. above the 100-
year design wave crest elevation including the storm surge
elevation and wind setup. For bridge designs where this
criterion cannot practically be met, refer to the FDOT
Drainage Manual, Section 4.9.5.
Horizontal Waterway Clearances
Horizontal clearance is defined as the unobstructed clear
distance between piers, fender systems, culvert walls, etc.
projected by the bridge normal to the flow. The following
minimum horizontal clearances shall be provided:
1. For crossings subject to boat traffic, a minimum horizontal
clearance of 10 ft. shall be provided.
2. Where no boat traffic is anticipated, horizontal clearance
shall be provided consistent with debris conveyance needs
and structure economy.
Regulatory Agency Requirements
Vertical and horizontal clearances will also be subject to the
requirements of the Coast Guard, Corps of Engineers, Water
Management District and any other regulatory agency having
appropriate statutory jurisdiction or authority. Such regulatory
agency requirements may exceed Department requirements.
Geotechnical Investigation
A geotechnical investigation is necessary for the design of the
new Pier. The geotechnical report should describe properties
of the soils in the vicinity of the proposed Pier along with its
Uplands connection and include all of the data collected, along
with engineering analysis and recommendations. In general, the
report should cover site terrain and geology including presence
or depth of water, a boring plan and logs of exploratory borings,
soil classifications and properties, recommendations for the
foundation design including vertical and lateral load supporting
capacities and design recommendations and values for piles.
Information required from the geotechnical report includes:
1. Description of site terrain and geology, including presence
or depth of water.
2. Description of exploration and sampling methods.
3. A plan indicating the location of borings and the elevations
related to the nearest benchmark. Borings and test pits shall
be numbered and located dimensionally in plan.
4. An evaluation of the subsurface stratigraphy and indication
of the results in a cross section profile.
5. Logs of exploratory borings, including:
• Surface elevation
• Elevation, thickness, description and classification of
each soil stratum
MICHAEL MALTZAN ARCHITECTURE, INC. 3 - 93