“In Montclair, the outlet of that is Spring Valley but our problem with Spring Valley is that the Ladislawa area hindi kami makapasok ng aming drainage (we cannot put the drainage inside), that is why we are planning to build a retarding basin near the fence of Ladislawa and Spring Valley,” Sorrera said.īut Sorrera said the problem with Montclair is that it is a private property. Meanwhile, the planned retarding basin in Spring Valley can temporarily store water coming from flood-prone Montclair Subdivision. Included in this is the P507-million flood-control project in Sasa Creek Drainage Area that is proposed funding by the Japan International Cooperation Agency (Jica). A canal-widening project and installment of HDPE pipes are also being done in La Verna to aid the water flow in the area.Īs of the latest, the retarding basin of the La Verna Outfall is currently ongoing.Īccording to the Davao City Information Office, the La Verna retarding basin is part of the City Government’s P2-billion infrastructure investment to address the flooding problem in various areas in Davao City. What we are currently doing is that we are distributing the flow into La Verna padulong didto sa (going to the) outfall,” Ortiz added.Īccording to Ortiz, the initial cost of the construction of the retarding basin is P297 million. The reason for that is because we have to make sure the water does not flow directly, dapat naa sa mo-hold sa tubig bago mugawas didto sa La Verna (The pump house should hold the rain water before we let it flow out of La Verna). “Naa ta gibutang didto na pump house (We are constructing a pump house), beside that is the retarding basin. “The size of that is 100 by 80 meters and the depth is five meters and the volume is 40,000 cubic meter of water that can be stored in the basin,” Sorrera said. She added that the size of the retarding basin in La Verna is larger than a basketball court. “Doon lang muna ang tubig, it stays there for a while habang mataas pa ang tubig, then hinay-hinay na sila mudagan sa outlet nato (The water stays there for a while as the water level is still high, then slowly it runs to the outlet),” said engineer Maria Gloria Sorrera, public information officer of the Davao City District Engineering Office (DPWH-DCDEO). If not to address the problem, at least to minimize the incident of flooding, not only didto sa (in) Diversion Road but didto sa (also its) immediate areas niya,” Ortiz said.Ī retarding basin is an open-pit infrastructure that is used to temporarily store rainwater run-off during heavy rainfall, to absorb and contain flooding during the event of heavy rains, which will be later released at a regulated flow rate, according to the DPWH website. “This is what we have thought of as the best solution for the problem.