Indicator C3 — Duplicate or Near-Duplicate Projects

AI-verified / Na-verify ng AI Data as of October 21, 2026

Duplicate or Near-Duplicate Projects

Very similar descriptions within ~100m or identical coordinates across contracts/years.

This is a statistical anomaly or indicator worth examining — not proof of wrongdoing, fraud, or corruption against any person.

Indicator: contracts 23OB0403 and 23OB0239 have near-identical descriptions about 144 m apart (funding year 2023; ₱46.73M, ₱46.54M). Worth checking whether they cover the same works. It is possible that the two contracts cover different segments or types of drainage structures within the same barangay.

Public record entityConstruction of RCBC Drainage System, Barangay Tumana, Marikina City

LocationCITY OF MARIKINA (METROPOLITAN MANILA), MARIKINA CITY, National Capital RegionContract 23OB0239

Amount₱46,535,318.28 sumbong source

Only contractors and government agencies named in public procurement records are shown. Private individuals are not named.

Satellite before / after

Esri Wayback · ~0.5 m

Before capture: 2021-02-02 · Maxar

After capture: 2025-04-25 · 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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How this was checked

publish · confidence 0.95

Model: gpt-4.1

Prompt: v4.1

Checked: October 22, 2026

The two project titles are near-identical, both refer to drainage system construction in Barangay Tumana, Marikina City, funded in the same year, by the same contractor, and are only 144 meters apart. The only differences in the titles are 'Brgy.' vs 'Barangay' (spelling variant) and the addition of 'RCBC' in one title, which is not a clear phase/section/segment marker or a different place name. There are no distinguishing markers per the supplied facts. The evidence is complete and meets the rule's criteria for publishing.

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Project completion

Schedule fields from DPWH transparency portal records and the Sumbong sa Pangulo flood-control list — not inferred beyond those columns.

Reported complete (DPWH): 1Ongoing: 0Delayed: 0Status unknown: 0

Project	Prog.	Target end	Actual end	Days late	Status
Construction of RCBC Drainage System, Barangay Tumana, Marikina City23OB0239	100%	April 14, 2024	April 14, 2024	—	completedsumbong source

Start: March 27, 2023 · Source fetched October 21, 2026

Rule Definition

Title similarity + distance or shared coordinates within municipality.

Triggering Data & citations

Similar project description near another contract in the same municipality

{
  "contractId": "23OB0239",
  "coordinates": {
    "lat": 14.661524,
    "lon": 121.09853
  },
  "municipality": "CITY OF MARIKINA (METROPOLITAN MANILA)",
  "distanceMeters": 143.73704852936834,
  "titleSimilarity": 0.9618320610687023
}

Source documents

sumbong — https://raw.githubusercontent.com/rukku/sumbongsapangulo.ph-datasets/main/flood_control_projects.geojsonFetched October 21, 2026