ICRI 2007 Project Award Winner
Share |

Award of Merit: Parking Structures Category

Ottawa Towers Plaza and Parking Restoration
grey line

Lansing, Michigan

Submitted by Carl Walker, Inc.

Ottawa Towers Plaza and Parking

State of Michigan Department of Management
Lansing, Michigan

Project Engineer/

Carl Walker, Inc.
Kalamazoo, Michigan

Repair Contractor
Kares Construction Company
Charlotte, Michigan

Material Suppliers/

American Hydrotech, Inc.
Chicago, Illinois

LymTal International
Orion, Michigan

The State of Michigan Ottawa Towers Parking Ramp and Plaza, built in 1980, encompasses two state buildings. The complex consists of an elevated landscaped area and two below-grade parking levels: one supported and one slab-on-grade parking level. 

The structural system for the supported parking slabs consisted of structural steel beam and column framing, with 5 in. (13 cm) thick conventionally reinforced cast-in-place concrete slabs. Chloride contamination had progressively deteriorated the structural integrity and durability of the supported slab. Full slab replacement was chosen as the repair method. Other repairs included new lighting, new fire protection, new plumbing, fresh paint, a heavy-duty low-odor deck coating system, new traffic-control equipment, and new signage. 

The structural system for the 88,000 ft2 (8175 m2) plaza consisted of cast-in-place conventionally reinforced concrete slabs. The plaza system cross section consisted of brick and asphalt pavers, cast-in-place concrete, landscaping, planters, and a subsurface waterproofing membrane bonded directly to the structural slab. The existing surface was removed, and a new system, including a complete new membrane system, subsurface drainage/isolation layer, cast-in-place floating slab, and brick paving with an insulation layer and snow melting system, was installed. The restoration included installation of a complete subsurface drainage system to eliminate internal/subsurface water ponding. A snowmelt system was installed down the center corridor of the plaza. 

The project was completed in August 2006 at a construction cost of $9.95 million.

ICRI Supporting Members


International Concrete Repair Institute, Inc.
1000 Westgate Drive, Suite 252
St. Paul, Minnesota 55114 USA
Phone: +1 651-366-6095

Copyright © 2015-2018 International Concrete Repair Institute, Inc. (ICRI) All rights reserved.

Privacy Policy | Antitrust Policy | Terms of Use | Contact Us