THE CITY Camp tunnel has to be widened to accommodate the volume of water coming from City Camp, Campo Sioco and Quirino-Magsaysay areas.

Asked for comment concerning Rep. Bernardo Vergara’s plans of funding the tunnel’s widening, City Engineer Leo Bernardez said narrow areas of the tunnel have to be enlarged to accommodate the large volume of water that converges at the City Camp lagoon.

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He said flooding at the lagoon occurs because narrow spaces slow down the flow of water.

Asked if controlled blasting is feasible, Bernardez said there are modern technologies, which could be explored wherein chemicals could be used to melt or soften boulders inside the tunnel. This is in lieu of blasting.

Earlier, the Mines and Geosciences Bureau said blasting the tunnel is possible, but risky.

In an earlier Sun.Star report, MGB chief geologist Faye Apil was quoted exploration of the tunnel has been planned in the 90s but was stopped due to public opposition.

However, she confirmed there are boulders inside the tunnel which contributes to the reduced flow of water.

She said public consultation should first be done before blasting is done.

The City Camp area and Crystal Cave are now thickly populated. (Rimaliza Opiña)