Indicator C5 — Pattern Consistent with Contract Splitting

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

Pattern Consistent with Contract Splitting

Multiple similar contracts to the same contractor/DEO just under a threshold in a short window.

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

Indicator: 5 contracts awarded to YZK BUILDERS by the same office started within 34 days, each between ₱42.5M and ₱50M (just under the ₱50M threshold), with 4 in the same municipality. It is possible that each contract covers a distinct section of the river in a different barangay, as part of a larger flood control program.

Public record entityConstruction of Pinacanauan River Flood Control Project, barangay Cataguing, San Mariano, Isabela

LocationSAN MARIANO (ISABELA), ISABELA, Region IIContract 23BG0094

Amount₱43,801,383.68 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: 2021-06-29 · Maxar

After capture: 2023-05-25 · Vantor

No post-completion imagery yet — the newest available capture predates the reported completion date.

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 0.98

Model: gpt-4.1

Prompt: v4

Checked: October 22, 2026

This is a textbook C5 indicator: five contracts, all just under the ₱50M threshold, awarded to the same contractor by the same DEO within 34 days. Four are in the same municipality (San Mariano, Isabela), and the titles are highly similar, all for flood control projects on the Pinacanauan River in different barangays. The C5 rule expects projects to be in different sitios/barangays/rivers, so this is not a data artifact and meets the rule's intent.

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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 Pinacanauan River Flood Control Project, barangay Cataguing, San Mariano, Isabela23BG0094Flood control	100%	October 5, 2023	August 15, 2023	—	completedsumbong source

Start: April 11, 2023 · Source fetched October 21, 2026

Rule Definition

≥3 contracts within 120 days, each 85–100% of ₱50M threshold, similar titles.

Triggering Data & citations

Cluster of contracts just under procurement threshold with similar scope

{
  "deo": "Isabela 3rd District Engineering Office",
  "contractId": "23BG0094",
  "contractor": "YZK BUILDERS",
  "windowDays": 120,
  "clusterSize": 5,
  "thresholdPhp": 50000000,
  "contractCostPhp": 43801383.68,
  "averageTitleSimilarity": 0.9454104785009713
}

Source documents

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

Possible Innocent Explanations

Legitimate multi-lot procurement
Different sites under same program