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Project

construction of the Margarita Maza Dam for the supply of drinking water to the city of Oaxaca de Juárez and the surrounding area (Paso Ancho) Dam, in the state of Oaxaca.

Sector: Water and Environment


Last Revision

November 14, 2025
Macroproject:
Infrastructure Projects of the National Water Plan
Short Name of the Project:
0993 Margarita Maza (Paso Ancho) Dam
Type of Investment:
Greenfield
Subsector:
Water Supply
Asset (s):
 Dam 1,000 litres per second (l/s) 
Contract Currency:
Mexican Pesos MXN
Estimated Investment MXN:

7,775,240,000

Estimated Investment USD:

420,283,243

Exchange rate (USD/MXN) used by the Ministry of Finance for the economic plan 2025: $ 18.5
Contract Scope:
  Construction
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DESCRIPTION
The project involves the construction of a storage dam, which will ensure a continuous supply of drinking water to the population of the Metropolitan Area of Oaxaca, benefiting 641,000 people.

Components:
-Dam
-Intake works
-Aqueduct
-Water treatment plant
-Interconnection lines and networks

LEGAL AND FINANCIAL STRUCTURE
Type of Project
  Public
Type of Contract
  Public Works
Selection Process
Open Domestic Bidding

STATUS
Stage
  Bidding
Substage
  Proposal Assessment
RELEVANT DATES
Request for proposals/Announcement October 09, 2025
Proposals Reception November 03, 2025
Ruling November 19, 2025
Execution/Construction Starting Date November 21, 2025
Term of the Contract May 15, 2027

GEOLOCATION
State(s)
Oaxaca   

SPONSOR
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Entity
Comisión Nacional del Agua
Department
Subdirección General de Agua Potable, Drenaje y Saneamiento
WebsiteInstitutional Arrangement

ADDITIONAL INFORMATION
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Source
Compras MX
Description
Compras MX is the Digital Public Procurement Platform of the Federal Public Administration, where anyone can access information about the purchases made by the Government of Mexico to support its operations for the benefit of all.
ID
LO-16-B00-016B00985-N-240-2025
Tendering Process
ID
LO-16-B00-016B00985-N-226-2025
Supervision
ID
LO-79-010-920024998-N-1-2025
Basic engineering and preliminary design
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Source
Secretaría de Medio Ambiente y Recursos Naturales
Description
Federal government entity and sectorial authority responsible for establishing the necessary criteria and instruments to guarantee the protection, preservation, and use of natural resources, by developing an environmental policy that ensures sustainable growth.
ID
20OA2025UD038
Permits
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Source
State Government
Project information

MULTIMEDIA

REMARKS
ID: 2516B000067
0992 Tren San Luis Potosí – Saltillo 0994 Agua para Campeche: Acueducto Chiná y Acuaférico Campeche

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