Hollander Ridge


 
Hollander Ridge Apartment Complex in Baltimore, Maryland

At 8:44 AM, on Saturday, July 8, 2000, the Hollander Ridge Apartment building was ringed with thousands of spectators awaiting the final countdown that would mark the end of its existence in a spectacular implosion that would reduce the towering structure to a pile of rubble.

 Hollander Ridge, the last federally subsidized high-rise project built in the city, was the fourth of six implosions that have been dramatically altering the face of public housing in Baltimore. 

On the city's eastern border between Interstate 95 and Pulaski Highway, the 1,000-unit project had been the focus of contention between public officials and residents for years.  There were mixed emotions in the hearts of the onlookers as the final 60 seconds of the structure was ticking away. 

There were 92 other buildings in the community complex that, along with the high-rise, housed over 4000 people.  Nothing remained of the other residences except piles of rubble awaiting processing and removal from the project site.  The only structures remaining were the apartment tower and the gymnasium at its base. 

The 59-acre site is going to be rebuilt as Arbor Springs Village, a 450-unit development of affordable senior housing.   This project is an ongoing part of a series of public housing revitalizations transforming the high-rise, high-density apartment complexes that became popular in the 1950s into lower-density developments for owners with a wider range of incomes.

Working for VHT Construction, Dykon began preparations for the implosion several weeks earlier.  The high-rise was built with pre-stressed reinforcing steel laced through all the floors.  These pre-tensioned steel bars tend to act like a banjo string when they are relieved all at once.  The resulting backlash can cause as much, if not more, flying rubble than the explosives used to blast the interior columns.  Special consideration has to be given to these pre-stressed steel and concrete buildings in order to protect the lives and property of those who live in the surrounding vicinity.
In addition to the pre-stressed steel in the floors, the outside of the building had a number of sheer walls with no windows or openings.  These walls are structurally capable of bearing enormous weight and tend to hold together during an implosion, rather than collapsing.   All the structural factors considered, this was a difficult and challenging project.
Dykon’s workforce began drilling the holes and weakening the sheer walls weeks before the implosion was scheduled to take place.  Entire walls had to be removed on multiple floors, the first three floors had to be completely cleared to make room for the collapsing highrise.  All the columns inside the building had to be wrapped with multiple layers of tough geotextile fabric to control flying debris from the explosives.  More geotextile fabric was draped over the large openings to control the flying debris generated by the sudden release of the pre-stressed reinforcing steel.

On July 6th, the building was nearly prepared.  Last minute drilling was being finished up in the basement.  Following the successful test blast, Dykon’s men began loading the explosives into the columns that supported the Hollander Ridge Apartment Highrise.  There were a total of 1166 holes loaded with 403 pounds of explosives into 57 load bearing columns.  On July 7th, with the implosion scheduled on the following morning, the building was drilled, prepped, loaded, and was ready to go.

The implosion of the highrise was initially scheduled for 8:00 AM, but several overly enthusiastic spectators had slipped into the trees bordering the jobsite directly in front of the highrise in hopes of getting a good seat for the show.  The shot was delayed while the local police directed the spectators from the area  to a safer vantage point. 

The countdown was coordinated over the police radios.  Several sirens were heard at once marking the one minute countdown to demolition.  Dykon  President Jim Redyke paced nervously back and forth at the entrance gate to the project.  Jared Redyke manned the two blasting machines required to initiate the 1166 charges that would soon guide the 20-story highrise to the ground. 

Thousands of spectators waited breathlessly as Jim’s voice was heard over multiple loudspeakers, counting down the last 10 seconds in the life of a building that was home for so many.  The word “FIRE” was heard throughout the community, then, instantly followed by the thundering boom of the first of 15 detonations designed to safely and efficiently turn the huge apartment complex to a pile of rubble ready to be recycled.

After the dust dissipated and Jared signalled the “ALL CLEAR”, everyone got to come in and pay their last respects to the Hollander Ridge Apartment Highrise which was lying exactly where it was designed to fall.

Kayode Osho with VHT Construction, Inc. & James Redyke with Dykon Blasting

Paul Brower with VHT Construction, Inc., and Jared Redyke with Dykon Blasting

Kayode Osho with VHT Construction, Inc., & the Dykon Blasting crew.

The Hollander Ridge Apartment after the implosion.

Click here to download a free screensaver of the Hollander Ridge Implosion.  It is over 8 megabytes so we recommend a high speed internet connection if one is available.

We also have a photo album slide show of the Hollander Ridge Project.  

Download a Video Clip of the
Hollander Ridge Implosion

The article above as published in 
Demolition Magazine


Dykon Explosive Demolition
1202 West 36th. Street North
Tulsa, Oklahoma  74127
918-583-9566