money on a complete rebuild.”

Le-Spradlin said the hydro demolition technique is being used to remove the top few inches of the pavement on I-215 bridges at 3500 South and 3800 South, leaving most of the existing pavement and reinforcing steel intact.

Other demolition methods could hypothetically cause structural damage and require more extensive repairs, resulting in higher costs and extended construction schedules, she said.

According to Le-Spradlin, using hydro demolition to remove and replace the concrete bridge decks will lengthen the life of the bridges by about 15 years.

The hydro demolition process utilizes a machine that moves over sections of bridge pavement spraying water under ultra-high pressure to remove the top 3 to 4 inches of the concrete deck.

Photo: Weston Kenney, Deseret News

The machine sprays water at up to 36,000of the driving thin-film transistor (DTr).
When a signal is applied via the gate line (GL), the switching thin-film transistor (STr) is turned on, and a signal of the data line (DL) is transferred to a gate electrode of the driving thin-film transistor (DTr) to turn on the driving thin-film transistor (DTr), thereby emitting light through the organic electro-luminescence diode (D). At this time, when the driving thin-film transistor (DTr) enters an ON state, the level of a current flowing through the organic electro-luminescence diode (D) from the power line (PL) is determined, thereby determining a gray scale. The storage capacitor (StgC) may perform the role of constantly maintaining a gate voltage of the driving thin-film transistor (DTr) when the switching thin-film transistor (STr) is turned off, thereby constantly