HomeMy WebLinkAboutExhibit 3Mr. Michael Jasper Page 3
COOPER ROBERTSON & PARTNERS
December 13, 2005
PROJECT INFORMATION
Information about this project was received from the project structural engineer, Mr.
Michael Jasper. We were provided with the following documents for this project, to aid us in
the preparation of this proposal: a Site Survey, a Site Plan, a Parking Garage Section, a
Preliminary Cost Report, and a narrative of the project.
The proposed Museum Park Underground Parking Garage will be located on the east
side of Biscayne Boulevard in Miami, Florida; between NE 9th and NE 11th Streets. The
Intracoastal Waterway (Biscayne Bay) is located to the east of the proposed garage area.
Based on the furnished survey site grades about +10 feet NGVD. The garage will be built
within the existing City of Miami park. The site is currently a park with maintained grasses,
trees, and asphalt pavement.
The proposed underground garage will be a 1-level below ground structure with a top
elevation of +10 feet NGVD and an inside top of bottom slab elevation of -2 feet NGVD. We
estimate interior columns will have compression loads on the order of 200 kips; but the buoyant
uplift forces (tension) may be greater than the compression forces and may control the design.
The current design uses permanent perimeter sheet piles, followed by construction of a
permanent concrete wall.
The current design uses a tremie slab to control water pressures during construction
followed by waterproofing and a thick structural slab.
The garage will utilize reinforced concrete construction for columns and slabs. Ground
floor slabs are expected to be loaded to a maximum of 200 psf.
The project site was visited by the writer, and we assess portions of the site to be
accessible to our truck mounted drilling equipment, We understand underground utilities are
present at this site. The location of underground utilities or structures should be identified to
KACO. KACO Consultants, Inc., can not be held responsible for damage to below ground
structures or utilities which are not identified to us.
PURPOSE
The purpose of our services on this project will be to explore the subsurface conditions,
evaluate the conditions discovered, discuss the technical feasibility of various aspects of the
basement construction, and provide preliminary recommendations for foundation design.
KAC
KADERABEK COMPANY
Mr. Michael Jasper Page 4
COOPER ROBERTSON & PARTNERS
December 13, 2005
PROPOSED SCOPE OF SERVICES
We propose to perform the following specific scope of services:
1, An engineer from our office will locate soil borings based on a site plan/site survey
furnished to our office and utility information provided to us. KACO will perform borings
in areas which are indicated to us to be free from underground utilities. KACO cannot be
held responsible for damage to underground utilities which are not identified to our staff.
KACO will contact Sunshine State One CaII service for advice about the location of
underground utilities for this project.
2. Review historic aerial photographs in order to position some of the borings in the
previously backfilled boat slips.
3. Based on our past experience in South Florida; it is our judgement that the preliminary
subsurface conditions can be explored with the following scope of field testing:
• 6 SPT Borings-70-Feet Deep
• 10 Test Excavations to Explore Surface Fill Conditions
4. An engineer from our office will classify and stratify the soil/rock samples recovered.
5. A software generated and plotted log of each boring will be prepared.
6. Prepare a Plan View drawing showing the proposed development, property lines and test
locations.
7. Prepare a Generalized Subsurface F•rofi a indicating II* boii col ►ditions -"countere-ci with ...
the results being presented in graphic format.
8. Based on the soil borings, we will estimate engineering parameters using on our
experience and the geotechnical literature.
9. Evaluate auger piles for a foundation system on this project, with pile diameters from 14
to 36-inches,
10. Estimate foundation settlement from 60-foot long auger piles.
11. Discuss the technical feasibility of using a cantilever sheet pile perimeter basement wall,
with fully welded joints, for the permanent basement wall.
12. Discuss the technical feasibility of using volclay products as a permanent water proofing
system beneath the bottom slab.
iAC0
KADERAEEK COMPANY
Mr. Michael Jasper Page 5
COOPER ROBERTSON & PARTNERS
13. Discuss the technical feasibility of using dewatering (well points or open pumping) es a
temporary means of lowering the groundwater during construction.
14. Discuss options for discharge of the temporary construction water which is a by product
of dewatering.
15. Discuss using a tremie seal as a construction method for construction dewatering.
16. Discuss methods for anchoring the basement slab.
17. Discuss a design high groundwater elevation.
18. Discuss foundation related construction costs based on information obtained from local
contractors; and review your preliminary cost report.
19. Provide preliminary recommendations for the best choice foundation system. The
recommendations will include: foundation type, foundation size, foundation capacity,
installation elevation, and site preparation requirements.
20. Summarize our activities on this project in the form of a written engineering Report which
will include the procedures used, the data collected, our evaluation, and our engineering
recommendations.
December 13, 2005
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KADERABEK COMPANY