New land bridge over tunnels safely reconnects park's two halves for animals and visitors
For over 50 years, Memorial Park in Houston, Texas, has been divided in half by Memorial Drive and its heavy traffic, but all that has changed. Human and animal traffic now have a seamless and safe way to enjoy both sides of the 1,500-acre park with the construction of a land bridge over recently completed vehicular tunnels.
Western Specialty Contractors – Houston Branch was tasked with waterproofing the project’s two sets of 25-foot-tall, 54-foot-wide concrete traffic tunnels that replace Memorial Drive and provide for land bridges across their tops. In August 2020, the Construction Manager at Risk Tellepsen Builders started moving dirt to facilitate the erection of 300 6-foot wide precast segments that would become the new tunnels.
Waterproofing work started five months later, in January, upon the arrival of the first set of precast panels.
Western's experts applied approximately 160,000 sqft of the specified Bentonite clay waterproofing with drain mat to the tunnels' exterior walls. Bentonite is an absorbent swelling clay that is durable, long-lasting, and environmentally friendly. The waterproofing sequencing followed the installation of the precast panels, and the entire process took about 15 months to complete.
“We are so proud to have been able to play a role in this innovative project for the Memorial Park Conservancy. And while it may have been a small part of this expansive project, waterproofing plays a critical role in maintaining the longevity of concrete structures. The Bentonite clay waterproofing we applied will mitigate the risk of water intrusion and small planting roots from penetrating the tunnel through the soil backfill. Utilizing the right type of waterproofing system is vital to protecting the integrity of these underground tunnels long term,” said Western Specialty Contractors Branch Manager Brian Dolezal.
The two sets of waterproofed tunnels were then each covered with 35-foot-tall dirt mounds that became a land bridge with a network of trails for pedestrians that overlooks the park with views of the city and a greenspace covered with trees and grass for birds and other wildlife.
The new eastbound vehicle tunnels opened to traffic in March 2022, with the westbound tunnels opening in May 2022. The architect on the project was Gunda Corporation, with Walter P. Moore and Henderson Rodgers serving as the structural engineers.
About Western Specialty Contractors
Family-owned and operated for more than 100 years, Western Specialty Contractors is the nation’s largest specialty contractor in masonry and concrete restoration, waterproofing, and specialty roofing. Western offers a nationwide network of expertise that building owners, engineers, architects, and property managers can count on to develop cost-effective, corrective measures that can add years of useful life to a variety of structures, including industrial, commercial, healthcare, historic, educational and government buildings, parking structures, and sports stadiums. Western is headquartered in St. Louis, MO, with 30 branch offices nationwide and employs more than 1,200 salaried and hourly professionals who offer the best, time-tested techniques and innovative technology. For more information about Western Specialty Contractors, visit https://WesternSpecialtyContractors.com.