gfc CONAGUA
STATEMENT OF INTENT
IMPLEMENTATION OF PRIORITY SANITATION PROJECTS
IN THE SAN DIEGO, CA. - TIJUANA, BC REGION
PARTICIPANTS:
A) United States Environmental Protection Agency (USEPA).
B) Secretariat of the Environment and Natural Resources of the United Mexican States,
through the National Water Commission (CONAGUA by its acronym in Spanish).
OBJECTIVE:
To recognize the need to work in coordination in the planning, design, construction and
rehabilitation of infrastructure for the conveyance, treatment, adequate disposal and, where
appropriate, reuse of the wastewater generated in the Tijuana River basin and that crosses
into the territory of the United States of America, and to help solvethe sanitation problem
in the San Diego/Tijuana region, including the Pacific Ocean.
For this purpose, Appendices 1 and 2 of this Statement of Intent list the projects that will
contribute to the above objective in the short- and long-term.
BACKGROUND:
> Since 1995, the USEPA and CONAGUA have worked together on the implementation of
the Border Water Infrastructure Program (BWIP), for the region 100-kilometers (62-
miles) north and 100 kilometers south of the US-Mexico border. This work has been
supported by grants between the USEPA and the North American Development Bank
(NADB). CONAGUA jointly invests in projects south of the border, within the framework
of the Memorandum of Understanding (MoU) with USEPA signed on September 25,
> The United States-Mexico-Canada Agreement (USMCA), Section 821, for which the
United States Congress allocated funds under the State and Tribal Assistance Grants,
instructs the USEPA to address the problem of transboundary flows of untreated
wastewater in the Tijuana River basin. Section 821 also instructs USEPA to coordinate
the "eligible public entities" for which the Eligible Public Entities Group (EPECG)
was formed.
> In September 2021, the USEPA and CONAGUA formed the 'Tijuana Binational
Wastewater Technical Working Group" ("Working Group"), which meets approximately
every two weeks with the aim of identifying priority projects to be implemented in
the short- and long-term.
Other Working Group members are the International Boundary and Water
Commission (IBWC/CILA), the Secretariat for the Environment and Natural Resources
(SEMARNAT), the Secretariat for the Management, Sanitation and Protection of Water
of the state of Baja California (SEPRQA), the Tijuana State Public Services Commission
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(CESPT) and NADB. The Working Group meetings generated a list of infrastructure
projects to be implemented in the short-and long-term. (Appendices 1 and 2).
INFRASTRUCTURE PROJECTS:
The "Participants" have defined the projects referred to above in 2 types: short- and
long-term as indicated below:
I. Short-term projects for completion in the years 2022 through 2027
A. Proposed works in the United States:
1. Expansion of the International Treatment Plant (ITP) to 50 mgd (2191 l/s).
B. Proposed works in Mexico:
1. Tijuana River Diversion
a) Rehabilitation of the Pumping Plant (PB, by its acronym in Spanish) CILA.
b) Rehabilitation of PB-1.
2. Rehabilitation of the International Collector.
3. Rehabilitation of the parallel gravity line.
4. Rehabilitation of the Antiguo Force Main.
5. Enclose the open channel of the PB-1 to San Antonio de los Buenos.
6. Rehabilitation of the Insurgentes Collector.
7. Rehabilitation of the Poniente Interceptor.
8. Rehabilitation of the Collector Carranza.
9. Rehabilitation of the Oriente Interceptor.
10. Phase I of effluent reuse from the La Morita and Arturo Herrera Wastewater
Treatment Plants (WWTPs).
11. Lift station and force main from Sainz Canyon to Arturo Herrera.
12. Rehabilitation of PB Matadero and Laureles 1 and 2.
13. Newl8 mgd (800 Ips) San Antonio de los Buenos Wastewater Treatment Plant
(SABTP).
14. Tijuana River Gates.
15. Backup power supply for PB-1.
II. Long-term projects:
A. Proposed works in the United States.
1. Diversion of the Tijuana River.
2. Advanced Primary Treatment Plant to treat flows from the Tijuana River.
3. Further ITP expansion.
4. Capture and use of methane from anaerobic digesters at the ITP.
5. Installation of a trash boom in the Tijuana River to capture trash before
B. Proposed works in Mexico:
1. Phase II effluent reuse project for the La Morita and Arturo Herrera
Wastewater Treatment Plants.
reaching the ocean.
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C. Proposed works with elements in the United States and Mexico.
1. Return linefortreated flows from the ITP in the United States to PB-1 in Mexico.
2. Convey flows from Goat Canyon (Los Laureles) and Smuggler's Gulch
(Matadero) by gravity to the ITP.
DEVELOPMENT:
To implement the aforementioned projects, the "Participants" acknowledge that to date
the following activities have been carried out:
a) In 2.020 and 2021, CILA and CONAGUA signed an agreement for the rehabilitation of 4
pumping plants, PB-CILA, PB Los Laureles 1 and 2, and PB Matadero; in 2021 the
rehabilitation of PB-CILA was completed. In early 2022, resources for 58.83 million
pesos were transferred to CILA for the rehabilitation of PB Los Laureles 1, anticipating
its start in the second half of 2022. In the short-term, the Mexican government,
through CONAGUA, will implement the actions for the rehabilitation of PB Laureles 2
and Matadero for an estimated amount of 91.85 million pesos.
b) Through the Planning Mechanism (MECAPLAN) ofthe Ministry of Finance and Public
Credit (Hacienda), CONAGUA is managing resources for 1,742 million pesos are being
developed to assist in the implementation ofthe rehabilitation ofthe International
Collector, rehabilitation of a section ofthe parallel line that leads the flow from PB-1 to
the SABTP, rehabilitation ofthe Antiguo Force main from PB-1 to the SABTP, enclose
the open channel from PB-1A to the SABTP, rehabilitation of the Insurgentes and
Carranza collectors, as well as the Poniente and Oriente interceptors; construction of
a pumping station and force main to convey wastewater from the Sainz Canyon to
the Arturo Herrera Wastewater Treatment Plant.
c) Within the framework of the BWIP between Mexico and the United States, the "
Tijuana River Diversion" projects are in the process of being certified, which include
the rehabilitation of PB-CILA (already completed) and PB-1 A and B. The estimated
cost of these two remaining projects is 240 million pesos. Meanwhile, the cost ofthe
"Rehabilitation ofthe International Collector" project is estimated at 320 million pesos.
d) Regarding the projects 'Tijuana River Gates"" with a cost of 76 million pesos and
"Backup power supply for PB 1" with a cost of 60 million pesos, the USEPA approved
the allocation of resources within the framework of the BWIP. Additionally, it will
contribute 50% of the resources for Phase I of the project for the reuse of effluents
from the Arturo Herrera and La Morita WWTPs, whose cost is estimated at 400 million
pesos, and the corresponding certification process is pending.
e) Through a Public Private Partnership (PPP) scheme, CESPT will rehabilitate SABTP.
The estimated cost ofthe project is 665 million pesos.
In relation to the long-term projects that are indicated in Appendix 2, "the Participants"
intend to develop, with the corresponding authorities, the allocation of resources for their
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implementation,
FUNDING:
The sources of funding for the projects identified above include, but are not limited to: the
USMCA Implementation Act, USEPA-CONAGUA MoU on the BWIP, the MECAPLAN, the
National Infrastructure Fund, as well as federal, state and local resources authorized by the
respective authorities and laws of each country.
The total investment cost of the short-term projects is estimated at $329.4 million dollars
(MD) from the US and $142.8 million dollars from Mexico. The anticipated investment cost
of long-term projects is approximately $323 million USD, as indicated in the Infrastructure
Projects Section and Appendix 2.
The Participants acknowledge that the collaboration under this document is subject to
the availability of appropriated funds. Nothing in this Statement obliges the Participants
to contribute funds or enter into any contracts, assistance agreements, inter-institutional
agreements or incur any financial obligation.
NON-BINDING:
This document expresses the good-faith intentions of the Participants, is not legally
binding, and does not create any contractual obligation, nor right or benefit, substantive
or procedural, enforceable by law or equity against the Participants, their officials or
employees, or any other entity or person. The Participants offer these services without
expectation of payment and expressly waive any future claim for compensation.
CONTACT POINTS:
The following institutions are designated as contact points:
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY located at "1200
Pennsylvania Avenue, 20460, NW Washington, DC, United States of America
NATIONAL WATER COMMISSION located at Insurgentes Sur 2416, Copilco el Bajo,
Coyoacan, 04340, Mexico City, Mexico
COSTS:
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Appendix T: Short-Term Projects and Capital Costs
1. Short-Term Projects
Capital Cost
Condition
Funding
source
US Government
share
Mexican Government
share
Total
million
USD
million
MXN
million
USD
million
MXN
million USD
million
MXN
A. Proposed Works in the United States
1 Expansion of ITP to 50 mgd (2191 l/s)
Treatment to secondary standards applicable in
the United States and installation of piping to
permit potential future expansion by 10 mgd (438
l/s) for a total of up to 60 mgd (2629 l/s).
$ 300.0
$ 6,000.0
$
$
$ 300.0
$ 6,000.0
Undergoing
NEPA
USMCA
B. Proposed Works in Mexico
la Rehabilitation of PB-CILA
Includes four new pumps; pretreatment system
with fine screening, trash removal and Vortex for
sand and grit removal; and new Tijuana River
intake. Mexico completed this project in 2022.
$
$
$ 4.0
$ 80.0
$ 4.0
$ 80.0
Completed
project
BWIP/
CONAGUA
and CESPT
funds
1 b Rehabilitation of PB1
Rehabilitation and four new pumping trains;
pretreatment system with fine screening, trash
removal and Vortex for sand and grit removal; new
motor control center; electric station maintenance;
improvements to the pump station building; and
installation of a supervisory control and data
acquisition (SCADA) system and flow meters.
00
o
$ 160.0
$ 4.0
$ 80.0
$ 12.0
$ 240.0
Project in
NADB
certification
process
BWIP/
CONAGUA
and CESPT
funds
2 Rehabilitation of the International Collector
Phase 1: construction of a new 60-inch polyvinyl
chloride (PVC) pipe along an alternative alignment
through the streets of Tijuana. Phase II:
rehabilitation of 8,200 feet (2,500 meters) of 72-
inch concrete pipeline using PVC pipe lining.
$ 8.0
$ 160.0
$ 8.0
$ 160.0
$ 160.0
$ 320.0
Executive
project under
development
BWIP/
MECAPLAN
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1. Short-Term Projects
Capital Cost
Condition
Funding
source
US Government
share
Mexican Government
share
Total
million
USD
million
MXN
million
USD
million
MXN
million USD
million
MXN
3 Rehabilitation of the parallel gravity line
Replacement of 13,225 feet (4,031 meters) of 60-
inch concrete pipe with PVC pipe.
$
$
$ 10.3
$ 205.0
$ 10.3
$ 205.0
Executive
project under
development
MECAPLAN
4 Rehabilitation of the Antiguo Force Main
Replacement of 14,383 feet (4,384 meters) of 42-
inch steel core concrete pipe.
$
$
$ 9.5
$ 190.0
$ 9.5
$ 190.0
Executive
project under
development
MECAPLAN
5 Enclose the open channel from PB-1 to San
Antonio de los Buenos
Installation of approximately 19,685 feet (6,000
meters) of piping by means of slip-lining a 60-inch
section to close the open gravity channel.
$
$
$ 12.8
$ 256.0
$ 12.8
$ 256.0
Executive
project under
development
MECAPLAN
6 Rehabilitation of the Insurgentes Collector
Replacement of a 36-inch concrete pipe with 36-
inch PVC pipe for 18,360 feet (5,596 meters).
$
$
$ 17.9
$ 357.0
$ 17.9
$ 357.0
Executive
project under
development
MECAPLAN
7 Rehabilitation of Poniente Interceptor
Replacement of 42-inch concrete pipe with PVC
pipe for a length of 2,303 feet (702 meters).
$
$
$ 1.4
$ 28.0
$ 1.4
$ 28.0
Executive
project under
development
MECAPLAN
8 Rehabilitation of the Collector Carranza
Replacement of 36-inch concrete pipe with 36-inch
PVC pipe for a length of 9,186 feet (2,800 meters) in
Colonia Carranza.
$
$
$ 2.9
$ 58.0
$ 2.9
$ 58.0
Executive
project under
development
MECAPLAN
9 Rehabilitation of the Oriente Interceptor
Replacement of 22,789 feet (6,946 meters) of 42-
inch and 48-inch concrete pipe.
$
$
$ 15.5
$ 310.0
$ 15.5
$ 310.0
Executive
project under
development
MECAPLAN
10 Phase 1 of effluent reuse from La Morita and
Arturo Herrera WWTPs
Installation of 23,400 feet (7,132 meters) of high-
density polyethylene (HDPE) piping and 2 new
$ 10.0
$ 200.0
$ 10.0
$ 200.0
$ 20.0
$ 400.0
Project in
NADB
certification
process
USEPA-
CONAGUA
Joint
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I. Short-Term Projects
Capital Cost
Condition
Funding
source
US Government
share
Mexican Government
share
Total
million
USD
million
MXN
million
USD
million
MXN
million USD
million
MXN
pump stations to convey effluent from the
treatment plants upstream of Rodriguez Dam for
indirect reuse.
Investment
Program
11 Lift station and force main from Sainz Canyon to
Arturo Herrera
Construction of a pump station and 5577 feet (1700
meters) of 16-inch diameter pipe with a capacity of
3.4 mgd (150 l/s).
$
$
$ 2.2
$ 43.0
$ 2.2
$ 43.0
Project in
development
MECAPLAN
12 Rehabilitation of PB Matadero and Laureles 1 & 2
Replacement of backup pumps, installation of a
new motor control center, and pretreatment
system in the lift station.
$
$
$ 7.6
$ 152.0
$ 7.6
$ 152.0
Executive
project under
development
CILA-
CONACUA
Cooperative
Agreement
13 New 18 mgd (800 l/s) SABTP
Uses an oxidation ditch process comprised of 2
independent modules, and includes construction
of a 656-foot (200 meter) ocean outfall.
$
$
$ 33.3
$ 665.0
$ 33.3
$ 665.0
Executive
project under
development
PPP/
FONADIN
14 Tijuana River Gates
Replacement of 23,211 feet (7,075 meters) of
concrete wastewater pipe along the Alamar and
Tijuana Rivers to reduce untreated wastewater
flows to the Tijuana River.
$ 1.9
$ 38.0
$ 1.9
$ 38.0
$ 3.8
$ 76.0
Project in
NADB
certification
process
BWIP
15 Backup power supply for PB-1
Construction of a backup power supply system for
the PB-1 electrical substation.
$ 1.5
$ 30.0
$ 1.5
$ 30.0
$ 3.0
$ 60.0
Project in
NADB
certification
process
BWIP
Total
$329.4
$6,618
$142.8
$2,852
$472.2
$9470
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Appendix 2: Long-Term Projects and Estimated Capital Costs, Share Has Not Been Determined
II. Long-Term Projects
Total Capital Cost
million USD
million MXN
A. Proposed Works in the United States
1 Diversion of the Tijuana River.
$ 27
$ 540
2 Advanced primary treatment plant to treat flows from the
Tijuana River.
$ 104
$ 2,080
3 Further ITP expansion.
$ 71
$ 1,420
4 Capture and use of methane from anaerobic digesters at
the ITP.
$ 21
$ 420
5 Installation of a trash boom in the Tijuana River to capture
trash before reaching the ocean.
$ 2
$ 40
B. Proposed Works in Mexico
1 Phase II effluent reuse project for the La Morita and Arturo
Herrera WWTPs.
$ 55
$ 1,100
C. Proposed Works with Elements in the United States and Mexico
"I Return line for treated flows from the ITP in the United
States to PB-1 in Mexico.
$ 12
$ 240
2 Convey flows from Coat Canyon (Los Laureles) and
Smuggler's Gulch (Matadero) by gravity to the ITP.
$ 31
$ 620
Total
$ 323
$ 6,460
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