AMPLIACIÓN DE LA PLANTA DE TRATAMIENTO DE AGUAS RESIDUALES
AVISO GENERAL DE LICITACIONES
La CIUDAD DE DOUGLAS, ARIZONA (la Ciudad) ha recibido la certificación de la Comisión de Cooperación Ecológica Fronteriza (COCEF) y recursos no reembolsables del Banco de Desarrollo de América del Norte (BDAN), a través de su Fondo de Infraestructura Ambiental Fronteriza (BEIF) que opera con aportaciones de la Agencia de Protección Ambiental de Estados Unidos (EPA), para financiar una porción de los costos asociados con la Ampliación de la Planta de Tratamiento de Aguas Residuales (el Proyecto).
La Proyecto es necesario para incrementar la capacidad de la planta de tratamiento de aguas residuales (PTAR) a un caudal medio anual de 2.6 millones de galones diarios (mgd) para poder captar y dar tratamiento al flujo generado por la ampliación de la red de alcantarillado y por el leve crecimiento demográfico en Douglas, Arizona.
La PTAR existente cuenta con un permiso para un caudal máximo mensual de 2.0 (mgd) y actualmente recibe un afluente promedio anual de 2.0 mgd. El proceso de tratamiento actual consiste en dos obras de cabecera con rejillas de desbaste, un desarenador aireado, dos tanques primarios, dos clarificadores secundarios en paralelo, lechos de secado de lodos y un tanque de contacto con cloro para la desinfección. La PTAR descarga efluente que cumple con las normas para agua reciclada de Clase C del Código Administrativo de Arizona R18-11-307.
La empresa que presta los servicios de supervisión será diferente de la que presta los servicios de construcción. Dichos contratos incluirán los siguientes componentes.
Servicios de construcción
La ampliación y mejoras a la PTAR consistirán en la construcción de: dos nuevas zanjas de oxidación, un nuevo clarificador secundario, una nueva estación de bombeo de lodos activados de retorno/lodos residuales activados (RAS/WAS), modificación de una estación de bombeo RAS/WAS existente, modificaciones y mejoras a las cuencas de aireación superficial existentes para convertirlas en digestores aeróbicos, conversión de un clarificador existente a espesador de biosólidos digeridos y un sistema de alimentación de amoniaco como aditivo alternativo para desinfectar el efluente. La planta está diseñada para cumplir con las normas de la Mejor Tecnología de Control Probada y Disponible (BADCT, por sus siglas en inglés) y las normas mínimas para efluente Clase B+, lo cual permitirá en un futuro elevar la planta a categoría Clase A para la reutilización del efluente.
El presupuesto total disponible para la construcción de la PTAR se estima en $7,500,000.00 dólares.
El Proyecto se ubica en la ciudad de Douglas en el extremo suroriente del condado de Cohise en el estado de Arizona, aproximadamente a 190 km al sureste de la ciudad de Tucson, Arizona. La PTAR se localiza en al suroeste de la mancha urbana y colinda con la frontera entre México y Estados Unidos.
Las convocatorias de licitación se publicarán electrónicamente en el sitio de Internet del BDAN, un diario local y un periódico de Sonora, México. Los procesos de licitación para estos servicios están programados para empezar en marzo o abril de 2017.
Se espera que el plazo de construcción dure aproximadamente veintiséis (26) meses a partir de la fecha del aviso para proceder con la construcción.
Para las obras que se financiarán parcial o totalmente con recursos del BDAN, la Ciudad realizará licitaciones conforme a las Políticas de Adquisición y Contratación del BDAN y la participación estará abierta a empresas de cualquier país.
Las oportunidades de licitación para éste y otros proyectos se pueden encontrar en: http://www.nadb.org/oportunidades.asp.
Para obtener más información sobre el proyecto, los interesados deben dirigirse a:
Diana Mardegain
Coordinadora Ejecutiva de Adquisiciones y Licitaciones
Banco de Desarrollo de América del Norte
Dmardegain@nadb.org
210.231.8000
CITY OF DOUGLAS, ARIZONA
North American Development Bank
WASTEWATER TREATMENT PLANT EXPANSION
GENERAL PROCUREMENT NOTICE
The CITY OF DOUGLAS, ARIZONA (the “Owner”) has received the certification of the Border Environment Cooperation Commission (BECC) and a construction assistance grant from the North American Development Bank (NADB), through its Border Environment Infrastructure Fund (BEIF), which is funded by the U.S. Environmental Protection Agency (EPA) to finance a portion of the costs for the Wastewater Treatment Plant Expansion (the “Project”).
The Project is necessary to increase the capacity of the wastewater treatment plant (WWTP) to an annual average flow of 2.6 million gallons per day (mgd), in order to accept and treat flows from the expanded wastewater collection system and modest growth in the City of Douglas.
The existing WWTP is permitted for a maximum monthly flow of 2.0 (mgd) and is currently receiving an average annual influent of 2.0 mgd. The existing treatment process consists of two headworks with bar screens, an aerated grit chamber, two primary tanks, two secondary clarifiers in parallel, sludge drying beds, and chlorine contact basin for disinfection. The WWTP discharges effluent meeting Class C reclaimed water standards, as per Arizona Administrative Code (A.A.C.) R18-11-307.
The Owner will procure and contract separate Construction Management Services, and Construction Services. The construction management firm shall not be the same firm as the construction services contractor. Each contract shall include the following components.
Construction Services
The WWTP expansion and improvements will include the construction of two new oxidation ditches, a new secondary clarifier, a new Return Activated Sludge/Waste Activated Sludge (RAS/WAS) Pump Station, modification to an existing RAS/WAS Pump Station, modifications and upgrades to the existing surface aeration basins to convert them to aerobic digesters, conversion of existing clarifier into a digested bio-solids thickener, and an ammonia feed system as an additive alternate for effluent disinfection. The facility has been designed to meet Best Available Demonstrated Control Technology (BADCT) standards and minimum Class B+ effluent standards, enabling a future upgrade to Class A reclaimed water for open access effluent reuse.
The estimated total budget available for the WWTP construction is $7,500,000.00.
The Project is located in the City of Douglas; in the southeast corner of Arizona in Cochise County, approximately 118 miles southeast of Tucson, Arizona. The wastewater treatment plant site is located at the southwest corner of the city and is adjacent to the U.S.-Mexico border.
Specific procurement notices will be published on NADB’s website and in a local newspaper and a newspaper in Sonora, Mexico. Procurement for Construction is estimated to begin in March or April, 2017.
Construction performance period for Project is estimated to last twenty-six (26) months from the Notice to Proceed.
The procurement process for works financed in part or completely with NADB funds will be carried out by the City of Douglas in accordance with NADB’s procurement policies and procedures, and shall be open to firms from any country.
This and other procurement opportunities are available at: http://www.nadb.org/recentbids.asp
For more information about this Project, contact:
Diana Mardegain
Sr. Procurement Specialist
North American Development Bank
Dmardegain@nadb.org
210.231.8000
North American Development Bank
WASTEWATER TREATMENT PLANT EXPANSION
GENERAL PROCUREMENT NOTICE
The CITY OF DOUGLAS, ARIZONA (the “Owner”) has received the certification of the Border Environment Cooperation Commission (BECC) and a construction assistance grant from the North American Development Bank (NADB), through its Border Environment Infrastructure Fund (BEIF), which is funded by the U.S. Environmental Protection Agency (EPA) to finance a portion of the costs for the Wastewater Treatment Plant Expansion (the “Project”).
The Project is necessary to increase the capacity of the wastewater treatment plant (WWTP) to an annual average flow of 2.6 million gallons per day (mgd), in order to accept and treat flows from the expanded wastewater collection system and modest growth in the City of Douglas.
The existing WWTP is permitted for a maximum monthly flow of 2.0 (mgd) and is currently receiving an average annual influent of 2.0 mgd. The existing treatment process consists of two headworks with bar screens, an aerated grit chamber, two primary tanks, two secondary clarifiers in parallel, sludge drying beds, and chlorine contact basin for disinfection. The WWTP discharges effluent meeting Class C reclaimed water standards, as per Arizona Administrative Code (A.A.C.) R18-11-307.
The Owner will procure and contract separate Construction Management Services, and Construction Services. The construction management firm shall not be the same firm as the construction services contractor. Each contract shall include the following components.
Construction Services
The WWTP expansion and improvements will include the construction of two new oxidation ditches, a new secondary clarifier, a new Return Activated Sludge/Waste Activated Sludge (RAS/WAS) Pump Station, modification to an existing RAS/WAS Pump Station, modifications and upgrades to the existing surface aeration basins to convert them to aerobic digesters, conversion of existing clarifier into a digested bio-solids thickener, and an ammonia feed system as an additive alternate for effluent disinfection. The facility has been designed to meet Best Available Demonstrated Control Technology (BADCT) standards and minimum Class B+ effluent standards, enabling a future upgrade to Class A reclaimed water for open access effluent reuse.
The estimated total budget available for the WWTP construction is $7,500,000.00.
The Project is located in the City of Douglas; in the southeast corner of Arizona in Cochise County, approximately 118 miles southeast of Tucson, Arizona. The wastewater treatment plant site is located at the southwest corner of the city and is adjacent to the U.S.-Mexico border.
Specific procurement notices will be published on NADB’s website and in a local newspaper and a newspaper in Sonora, Mexico. Procurement for Construction is estimated to begin in March or April, 2017.
Construction performance period for Project is estimated to last twenty-six (26) months from the Notice to Proceed.
The procurement process for works financed in part or completely with NADB funds will be carried out by the City of Douglas in accordance with NADB’s procurement policies and procedures, and shall be open to firms from any country.
This and other procurement opportunities are available at: http://www.nadb.org/recentbids.asp
For more information about this Project, contact:
Diana Mardegain
Sr. Procurement Specialist
North American Development Bank
Dmardegain@nadb.org
210.231.8000
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