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 23DH0018 and 22DH0004 have near-identical descriptions about 765 m apart (funding years 2022, 2023; ₱96.50M, ₱83.51M). Worth checking whether they cover the same works. It is possible these are two phases or extensions of the same river control project funded in different years.

Public record entityConstruction of River Control along Pagsanjan River, Brgy. Wawa, Lumban, Laguna

LocationLUMBAN (LAGUNA), LAGUNA, Region IV-AContract 22DH0004

Amount₱83,514,566.55 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: 2020-03-27 · Maxar

After capture: 2025-05-12 · 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, with only 'Barangay' vs 'Brgy.' as a difference, which is a spelling variant and not a distinguishing marker. Both are for 'Construction of River Control along Pagsanjan River, [Brgy./Barangay] Wawa, Lumban, Laguna', funded in consecutive years, and are located about 765 meters apart. 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 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 River Control along Pagsanjan River, Brgy. Wawa, Lumban, Laguna22DH0004Flood control	100%	January 17, 2023	November 14, 2022	—	completedsumbong source

Start: February 19, 2022 · 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": "22DH0004",
  "fundingYear": 2022,
  "municipality": "LUMBAN (LAGUNA)",
  "distanceMeters": 764.6430781902702,
  "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