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 23DN0036 and 22DN0033 have near-identical descriptions about 210 m apart (funding years 2022, 2023; ₱29.40M, ₱29.40M). Worth checking whether they cover the same works. It is possible that the second project is a continuation or expansion of the first, or covers a nearby section not specified in the title.

Public record entityConstruction of Flood Control Structure, Calawis Creek, Barangay Calawis, Antipolo City

LocationCITY OF ANTIPOLO (RIZAL), RIZAL, Region IV-AContract 23DN0036

Amount₱29,399,996.27 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 mLocation approximate

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, differing only in the spelling variant 'Barangay' vs 'Brgy', which is not a distinguishing marker. Both are for 'Construction of Flood Control Structure, Calawis Creek, [Barangay/Brgy.] Calawis, Antipolo City', funded in consecutive years, about 210 meters apart, with nearly identical costs. There are no phase, package, section, or other location markers that would distinguish them as separate works. The evidence is complete and meets the rule's criteria.

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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 Flood Control Structure, Calawis Creek, Barangay Calawis, Antipolo City23DN0036Flood control	100%	November 2, 2023	November 2, 2023	—	completedsumbong source

Start: March 8, 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": "23DN0036",
  "fundingYear": 2023,
  "municipality": "CITY OF ANTIPOLO (RIZAL)",
  "distanceMeters": 209.51989880868805,
  "titleSimilarity": 1
}

Source documents

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

Possible Innocent Explanations

Phased construction seasons
Upstream/downstream segments recorded separately