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Sunday, December 8, 2019 Vol. 15 No. 59
TROUBLED BRIDGES OVER WATER
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By Lorenz S. Marasigan
OR an archipelago like the Philippines, connectivity is crucial to spur trade and economic growth among the thousands of islands in the country, and the government believes that developing and rehabilitating bridges is crucial to achieving this goal.
Bridges are so crucial for this administration that it is spending over P2 trillion to build new and retrofit old bridges across the three main islands of the country. Since the new government assumed power, it has set its sights on the rehabilitation of old bridges to improve traffic flow and promote greater linkages among cities and islands. There are about over 8,000 bridges across the Philippines, according to documents from the Department of Public Works and Highways (DPWH), and as of 2015, at least 36 percent are in good condition, 44 percent are considered fair, 13 percent are deemed poor, and about 5 percent are in a bad state. The bridges in poor to bad condition are the bridges that require rehabilitation, strengthening, retrofitting or replacement. Public Works Secretary Mark A. Villar said that, to date, his group has completed 2,709 bridge projects since 2016. Of these, 462 were widened, 108 were constructed, 1,642 were strengthened, 155 were replaced, and 342 local ones were built. These include the Lucban Bridge in Cagayan, the Marcos Bridge in Marikina, the Sicapo Bridge in Ilocos Norte, the Pigalo Bridge in Isabela, the Anduyan
Bridge in La Union, the Tallang Bridge in Cagayan, the Bolo-Bolo Bridge in Misamis Oriental, the Caguray Bridge in Occidental Mindoro, the Tinongdan Bridge in Benguet, the Pasac-Culcul in Pampanga, the Aganan Bridge in Iloilo, the Maddiangat Bridge in Nueva Vizcaya, and the Pigalo Bridge in Isabela. Villar noted that his department uses the Road and Bridge Information Application (RBIA) to determine the bridges that needed to be rehabilitated and retrofitted. “It has been implemented throughout the department to enable road and bridge inventory and to condition data to be updated by the regional planning and design division,” he said. “All regional offices are tasked to conduct regular bridge inspection and submit data findings to the planning service through the RBIA system.” He explained that retrofitting can be categorized into two: seismic and non-seismic. For seismic retrofitting, the agency implements the seismic vulnerability rating of bridges—here, bridges are chosen and prioritized according to their vulnerability to earthquake, seismic hazard, and bridge importance. The higher the seismic rating score, the greater the need for the bridge to be evaluated for seismic retrofitting.
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Stepping up to the challenge of connecting thousands of islands, and in-city communities, the Department of Public Works and Highways is leading an ambitious program to rehabilitate—as a preemptive measure given the frequent earthquakes—several iconic, old, but still very useful bridges, and building new ones.
RETROFITTING of Marikina Bridge BERNARD TESTA
In early November, days after three big earthquakes shook Mindanao, talk of the “Big One,” the imminence of a catastrophic earthquake hitting the Philippines, prompted the DPWH to speed up plans strengthen the bridges—starting with Guadalupe Bridge in Mandaluyong—in the Philippines to withstand quakes of up to magnitude 8. At that time, Villar said his group has created a rehabilitation plan for Guadalupe Bridge—a critical portion of Edsa that connects the cities of Makati and Mandaluyong—to prepare it for the so-called Big One. “There’s a need to rehabilitate
Guadalupe Bridge given the possibility of the Big One happening in Metro Manila. Now we realized that there is concern in the traffic, so when we made the plans for the rehabilitation, part of the plan is to construct service lanes on each side,” he said during the BusinessMirror Coffee Club. He said the service roads will ensure that traffic will continue to flow while the bridge undergoes rehab. “There’s no scenario where we will close Guadalupe Bridge. Guadalupe is really critical, but we understand that closing Guadalupe will cause armageddon. It really Continued on A2
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Source: BSP (December 6, 2019 )