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FOR OFFICIAL USE ONLY The Philippines Agno and Allied Rivers Urgent Rehabilitation Project External Evaluator: Junko Saikawa (KRI International Corporation) Field Survey: November 2007 1. Project Profile and Japan’s ODA Loan Baguio Project site Manila Cebu City Philippines Davao Map of project area Bugallon short-cut channel 1.1 Background The Agno River runs through the western part of the central Luzon region and flows into the Lingayen Gulf in the hinterland of the vast alluvial plain of Pangasinan. The square area of the river basin ranks second on Luzon Island and fifth nationwide. In this basin, flooding due to typhoons occurred repeatedly, frequently resulting in damage to houses and farmland, etc. In addition, due to the earthquake in July 1990 and the volcanic ash and lahars from the eruption of Mount Pinatubo in June 1991, the riverbed rose, resulting in damage to the flood control facilities as well. 1.2 Objective The objective of this project is to reduce flood damage by rehabilitating existing flood control facilities for which urgent measures are necessary on the lower reaches of the Agno River and the upper reaches of the Sinocalan River, thereby contributing to the stability of people’s livelihoods and the development of the regional economy. 1.3 Borrower/Executing Agency Government of the Republic of the Philippines / Department of Public Works and Highways (DPWH) 1 FOR OFFICIAL USE ONLY 1.4 Outline of Loan Agreement Loan Amount / Loan Disbursed Amount 8,312 million yen / 8,280 million yen Exchange of Notes / Loan Agreement July 1995 / August 1995 Terms and Conditions -Interest Rate 2.5%/year (consultant 2.1%/year) -Repayment Period (Grace Period) 30 years (10 years) -Procurement General untied Final Disbursement Date June 2005 Main Contractors Toyo Construction Company Ltd., Philippine National Construction Corporation (Philippines) Consulting Services Nippon Koei Co., Ltd., CTI Engineering Co. Ltd., Basic Technology & Management Corporation (Philippines), PKII Engineers (Philippines) Feasibility Study (F/S), etc. M/P and F/S: 1989–1991 JICA E/S (D/D): 1988 E/S loan (PH-P88) 2. Evaluation Result (overall evaluation: B) 2.1 Relevance (rating: a) This project was consistent with the national plan, etc., both at the time of appraisal and at the time of ex-post evaluation, and so the relevance of the project implementation was and remains extremely high. 2.1.1 Relevance of the plan at the time of appraisal In the project region, flooding due to typhoons occurred repeatedly, frequently resulting in damage to houses and farmland, etc. In the water resource sector of the Medium-Term Philippine Development Plan (1993–1998) at the time of the appraisal, one of the objectives was to place priority on flood control projects in the 12 major river basins, in order to improve agricultural productivity and minimize loss of human life and property. Flood control and management of the major rivers is the responsibility of DPWH, and a comprehensive water resource development programs has been underway since the 1960s for seven rivers including the Agno River. 2.1.2 Relevance of plan at the time of ex-post evaluation In the environmental and natural resource sector of the Medium-Term Philippine Development Plan (2004–2010) at the time of the evaluation, one of the objectives was to mitigate the occurrence of natural disasters in order to prevent the loss of human life and property. Development of suitable flood control and drainage facilities, including 2 FOR OFFICIAL USE ONLY rehabilitation and improvement of existing facilities, across the entire area affected by flood damage was mandated as a countermeasure. Furthermore, in the DPWH’s current Medium-Term Development Plan (2005–2010), continuation of the comprehensive plan for priority major river basins and development of suitable flood control and drainage facilities in regions affected by flood damage are mandated as strategy. Figure 1: Project Area Province line Road River Levee Project area 2.2 Efficiency (rating: b) In this project, the project cost was basically as planned, but the project period exceeded the plan by 48%. Therefore, the efficiency of the project was evaluated as moderate. 2.2.1 Outputs A comparison of the planned output and the actual output is shown on Table 1. The main changes in the plan and the reasons for them are as follow. Agno River ・ As the result of a detailed design review,1 the total dredging amount increased because it became necessary to dredge for bank protection works and there was the addition of construction of a channel to supply water for fish farming. 1 As a result of the detailed design review, it was ascertained that there was more actual sediment than the assumed amount, and conversely, the flow could be secured without dredging after all. 3 FOR OFFICIAL USE ONLY ・ The total length of bank protection sites increased due to design changes because of alterations in the topography of the riverbed and river banks and due to additional sites requiring repair because of flood damage in August 1999. ・ As the result of an elevation study, it was ascertained that the sites for levee raising (3,000 m) in the original plan exceeded the designed flood level. 2 Instead, construction for levee raising was conducted in three locations (total of 540 m). Moreover, a setback dike3 was installed to protect the levee at Guelew where it was damaged during the wet season in 1998. ・ The right-bank levee was paved to ensure all-weather access to deal with levee sites which are damaged. Sinocalan River ・ Embankments were planned, but because land acquisition was necessary and since the river meanders, the bank protection works were switched to riverbank locations near residential areas and existing roads. Tarlac River ・ The implementation of TRIIW (Tarlac River Interim Improvement Works) was added as a condition when the Region III Local Development Council approved the Agno River Flood Control Project (II). ・ It became necessary to repair levee sites (Colibanban, Maleyep) which were damaged by the typhoon in August 2004. Consulting Services ・ Accompanying the addition of components to the civil works, the following were added: detailed design and construction supervision and monitoring of TRIIW; necessary studies, design, and construction supervision and monitoring of the Domalandan Bridge area construction; and TOR for flood analysis, etc. Table 1: Comparison of Output Planned at Time of Appraisal and Actual Output Plan Actual 1) Civil Works a) Agno River i) Dredging: 8,626,690 m3 i) Dredging: 11,494,521 m3 (35.51 km) Low channels Low channels: 6,616,000 m3 (21.08 km) Short-cut channels in 3 locations Short-cut channels in 3 locations: 4,805,600 m3 ii) Bank protection works (7.2 km) Low-water embankments: total Water supply channel for fish farming: 72,921 9,100 m m3(7.23 km) iii) Levees ii) Bank protection works Raising of existing levees: 3,000 m Low-water embankments: total 13,730 m 2 The water level of the flood for which the project is designed (a 10-year flood in this case). 3 This refers to a levee built a certain distance from the main levee in the event that the strength of the main levee is insufficient to protect important areas. In the case of Guelew, rocks, stones, and sand were built up immediately beside the existing levee. 4 FOR OFFICIAL USE ONLY (left bank) iii) Levees iv) Bridges Raising of existing levees: 540 m (left bank) Bugallon Bridge: extension 393 m; Construction of setback dike on right bank width: 9.3 m (Guelew) iv) Bridges Bugallon Bridge: extension 393 m; width: 7.3 m v) Coffering: 6 locations, total 1,366 m vi) Sluice and drainage ditch vii) Paving of right-bank levee: 31.6 km (Lingayen–Wawa) b) Sinocalan High-water embankments in 6 Low-water embankments in 7 locations, total River locations, total 1,500 m 1,280 m c) Tarlac River i) TRIIW (interim improvement works) (right-bank embankment/raising): 4,974 m ii) Repair work on right-bank levee (Colibanban, Maleyep): 1,650 m 2) Consulting Services Foreign 172 MM, Local 138 MM Foreign 244 MM, Local 333 MM Detailed design review; bidding Detailed design review; bidding assistance; assistance; construction monitoring construction monitoring and supervision; project and supervision completion activities (PCR, preparation of O&M manual); detailed design and construction monitoring and supervision of TRIIW; necessary studies, design, and construction monitoring and supervision of construction around the Domalandan Bridge; study of the existing Urbiztondo Bridge and initial design of new bridge; flood analysis; preparation of detailed diagrams, quantity specifications, and construction monitoring/supervision assistance for the repair of the right-bank levee on the Tarlac River Figure 2: Raising the left-bank levee Figure 3: TRIIW current works of the Agno River 2.2.2 Project period The planned project period was from August 1995 to March 2002 (80 months), but the actual project period was from August 1995 to May 2005 (118 months), or 148% of the planned period. The main reason for the extension was the addition of components including repairs of places damaged by typhoons during construction (repair of the 5 FOR OFFICIAL USE ONLY Guelew levee, bank protection in the area of the Domalandan Bridge, paving of the levee on the right bank of the Agno River, construction of a channel to supply water to a fish farm, TRIIW, and repairs to the right-bank levee on the Tarlac River). The civil works were planned to be conducted from September 1997 to March 2002 (54 months), but in fact were conducted from April 1998 to May 2005 (86 months), an extension of 32 months. The construction for the originally planned components was also delayed due to design changes necessitated by changes in the condition of the riverbed and diversion of construction equipment for use in the additional components.