Construction of Flood Mitigation Structure23OA0060

Construction of Riverwalls along Tangos River, Navotas City (Phase 1)

Construction of Riverwalls along Tangos River, Navotas City (Phase 1) is a DPWH-tracked public work in CITY OF NAVOTAS (METROPOLITAN MANILA), NAVOTAS CITY, National Capital Region. Reported contract value: ₱49,499,652.24. Status: Reported complete (DPWH). Contractor on record: TOPNOTCH CATALYST BUILDERS INC. Figures trace to sumbong.

CITY OF NAVOTAS (METROPOLITAN MANILA), NAVOTAS CITY, National Capital Region

Region: National Capital Region

Esri Wayback · ~0.5 mLocation approximate

Before capture: 2021-06-29 · Maxar

After capture: 2025-04-20 · Vantor

Satellite comparison for public reference — not proof of completion or non-completion.

Imagery may not show small or linear works; no visible change is not evidence of wrongdoing.

Imagery © Esri, Maxar, Earthstar Geographics, and the GIS User Community

Caveats & resolution

Esri World Imagery Wayback (~0.5–1 m); dates are archive release dates, not capture timestamps.
Imagery may not show small or linear works; no visible change is not evidence of wrongdoing.
DPWH coordinates can be approximate; marker shows the imagery center (may be snapped to riverbank/coast).

Disclaimer

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Total Contract Cost

₱49,499,652.24

Progress100%

Source: DPWH Transparency Portal (via BetterGov.PH mirror, snapshot 22 Jan 2026); Sumbong sa Pangulo flood-control list where applicable

Follow the peso

2 of 5 steps linked to this project. Links are automated matches unless marked confirmed.

1. GAA budget line
FY2023 · ₱8,000
Probable match · score 0.88
DBM GAA source ↗
2. SARO / NCA release
No SARO/NCA found for this office and year. DBM publishes releases by agency and office, rarely by project.
3. PhilGEPS award
Not found in PhilGEPS by contract ID 23OA0060 or title. The open PhilGEPS mirror does not include every DPWH notice.
4. DPWH progress + satellite
100% reported · imagery 2021-06-29 → 2025-04-20
Same record (DPWH contract ID)
DPWH Transparency Portal source ↗
5. COA audit finding
No COA finding names this project. COA audits DPWH by office each year; project-level findings are only linked when the report names the contract.

Site vs flood hazard · Project NOAH 100-year map

Medium flood hazard · NCR, Third District

Based on the coordinates published with the DPWH record and NOAH file Metro Manila.zip. Pins are sometimes placed at the town center rather than the site. NOAH data (ODbL) · Need vs spending by province

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Money Trail

1. Appropriation

Probable match · score 88%

UACS: 18001
Amount: ₱8,000,000.00 (GAA By-Object, amounts in ₱'000 × 1,000)
Program / description: Rehabilitation of Floodwall along Malabon-Tullahan River, Brgy. Potrero, Malabon City
GAA fiscal year: FY2023

DBM GAA source document

2. Allotment

Agency-level releases for FY2023, not tied to this contract

Malabon-Navotas District Engineering Office · SARO 16 (₱22,616,681,592.00) · NCA 0 (₱0.00)

Top SAROs
SARO SARO-BMB-A-23-0024206 · ₱22,279,640,000.00 · Source document
SARO SARO-BMB-A-23-0024467 · ₱310,000,000.00 · Source document
SARO SARO-BMB-A-23-0022993 · ₱22,716,000.00 · Source document
SARO SARO-ROVII-23-0020381 · ₱627,189.00 · Source document
SARO SARO-ROV-23-0023529 · ₱617,483.00 · Source document

3. Procurement & Award

No PhilGEPS award linked in the link table for this contract yet.

Contractor

TOPNOTCH CATALYST BUILDERS INC

241 projects · ₱13.6B total · 65 flags

Other projects by this contractor

No sat.

SUSTAINABLE INFRASTRUCTURE PROJECTS ALLEVIATING GAPS (SIPAG)- ACCESS ROADS AND/OR BRIDGES FROM THE NATIONAL ROAD/S LEADING TO MAJOR/STRATEGIC PUBLIC BUILDINGS/FACILITIES- CONST. OF ROAD DIKE ALONG BUCAYAO RIVER, PHASE 3, BRGY. SAN LUIS, NAUJAN, OR. MINDOR

Region IV-B, Region IV-B

2024₱186.0M

Past target date (DPWH On-Going)

No sat.

CONSTRUCTION OF FLOOD CONTROL STRUCTURE AT FILINVEST, BARANGAY BAGONGSILANGAN, QUEZON CITY

Quezon City 1st DEO, National Capital Region

2024₱143.3M

Past target date (DPWH On-Going)

No sat.

CONVERGENCE AND SPECIAL SUPPORT PROGRAM-SUSTAINABLE INFRA. PROJECTS ALLEVIATING GAPS(SIPAG)-SIPAG-ACCESS ROADS AND/OR BRIDGES FROM THE NATIONAL ROADS LEADING TO MAJOR/STRATEGIC PUBLIC BUILDINGS/FACILITIES-CONST. OF ROAD,PHASE II,SITIO DUPLAS,BRGY. KALAWAK

Bulacan 3rd DEO, Region III

2025₱142.5M

Past target date (DPWH On-Going)

No sat.

CONVERGE. AND SPECIAL SUPPORT PROG. - SUSTAINABLE INFRA. PROJS. ALLEVIATING GAPS (SIPAG) - SIPAG - ACCESS ROADS AND/OR BRIDGES FROM THE NATIONAL ROADS LEADING TO MAJOR/ STRAT. PUBLIC BLDGS/ FACILITIES - CONSTRUCTION OF ROAD, PHASE I, SITIO DUPLAS, BARANGA

Bulacan 3rd DEO, Region III

2025₱142.5M

Past target date (DPWH On-Going)

No sat.

CONSTRUCTION OF FLOOD CONTROL DIKE AT NABASAG RIVER (PHASE 1), PILAR, BATAAN

Bataan 2nd DEO, Region III

2024₱141.5M

Past target date (DPWH On-Going)

No sat.

CONSTRUCTION OF DRAINAGE ALONG BACOOR DIVERSION ROAD, CAVITE

Region IV-A, Region IV-A

2024₱112.3M