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City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
City of San LuisWater & Wastewater Improvements
Yuma County, Arizona
Presented to:Project Sponsor and Agency Stakeholders
March 3, 2004
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Agenda
General Aspects
Environmental and Human Health Indicators
Environmental, Human Health and Sustainable
Development Strategy
Technical Approach, Objectives and Funding Plan
Public Participation Strategy
Project Development Schedule
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
General Aspects
The City of San Luis is located in the southwest corner of Arizona, 20 miles south of Yuma. The community borders Mexico with San Luis Rio Colorado, Sonora, to the south and the State of Baja California del Norte to the west.
Project Location
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Population served: 15,322 Growth rate (90-00): 363%
Year Population1980 (add info)1990 15,3222002 18,345
Project Sponsor Profile:
General Aspects
MHI: $26,250.00 Unemployment rate: 5.0% 4,142 water accounts 3,738 sewer accounts
Water Service
Number of Connections
Residential 3946
Commercial 196
Sewer Service
Number of Connections
Residential 3738
Commercial 0
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
The City of San Luis obtains water from groundwater wells located east of the City. Four (4) sites containing 8 wells supply water to the City’s distribution system, from which seven wells are currently active.
State of Existing Water Supply, Storage, & Distribution System
General Aspects
Well Site Groundwater Pumps
Capacity (gpm)
Distribution System Pumps
Capacity (gpm)
Backup DS Pumps
Capacity (gpm)
Storage Tanks Capacity (gal)
Well Site 1
Well 1-1 200 - -
Well 1-2 205 300 300
100,000Well 1-3 260 400 400
Well Site 2
Well 2-1 200 225 225 2 @15,000
Well 2-2 320 400 400 125,000
Well Site 3
Well 3-1 500 780 780
300,000Well 3-2 500 780 780
Well Site 4
Well 4-1 1000 1560 780 500,000
Total Capacity 3185 4445 2885 1,055,000
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
State of Existing Water Treatment, Storage, & Distribution System
General Aspects
The City obtained a loan from the Department of Agriculture Rural Economic and Community development (RECD) for the construction of two (2) additional well sites and 2 MG storage.
The state requires a drinking water source adequacy minimum of 50 gpcpd (gallons per capita per day). For the city’s total population of 15,322 inhabitants, the minimum source capacity is 766,100 gpd; therefore, existing well and pump capacities appear to comply with state regulations.
The current water distribution system is composed of pipes ranging from 4-inch diameter to 12-inch diameter. The old distribution mains in the system are made of asbestos cement and the newer pipelines are polyvinylchloride (PVC). There are 5 PRV’s in system
Service Coverage = 99%
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
State of Existing Water Treatment, Storage, & Distribution System
General Aspects
Water System Deficiencies:
The groundwater source has significantly high levels of iron and manganese.
Iron and Manganese levels have caused deterioration of the distribution system and created conditions where service lines and meters are clogged and service is interrupted.
Undersized pipelines, old asbestos cement pipes and elevated pressures cause service problems.
Small water system serving Posada del Sol suspected to be high in lead.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Iron/Manganese Treatment
Distribution System Improvements Replace undersized and deteriorated existing pipelines
Replace existing asbestos cement (AC) pipelines
Install pressure release valve at 8th Avenue
Replace meters
• Connect Posada del Sol trailer park to the system
Proposed Water Systems ImprovementsGeneral Aspects
Total Estimated Cost – $5,049,100From City’s Capital Improvement Plan
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Existing Water System
Storage Tank @ 8th Avenue
Storage Tanks @ Juan Sanchez and Cesar Chavez
Storage Tank @ 6th Avenue
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
The existing Wastewater Treatment Plant (WWTP) was built in 1982, the original design capacity of the plant was 750,000 gallons per day.
1995 - capacity upgrade to 1.5 mgd . 2003-2004 – capacity upgrade to 1.6 MGD is under construction. Service Coverage = 100% of San Luis. Town of Gadsden, located approximately 4 miles north of San Luis, will
also be served by WWTP. The present average daily flow rate is 1.2 mgd; therefore, the plant is
currently operating at 80% of its total capacity. The treatment plant is currently operating without a discharge permit, and
without specified effluent quality standards. Negotiations with IBWC are on-going.
State of Existing Wastewater Collection & Treatment
General Aspects
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
State of Existing Wastewater Collection & Treatment
General Aspects
Wastewater System Deficiencies:
Existing demands with the addition of anticipated demands
from the Town of Gadsden and new building permits
currently issued, WWTP capacity will reach at least 85%
capacity in next 12 months.
Existing pump stations are under capacity for existing flows.
Undersized collection lines exist.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
• WWTP Improvements
• Pump Station Improvements Rehabilitate and expand pump station 300 A and related piping New pump station at Juan Sanchez Blvd. and 10th Avenue
• Collection System Improvements
Proposed Wastewater Systems Improvements
General Aspects
Total Estimated Cost – $2,461,000From City’s Capital Improvement Plan
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Existing Waster and Wastewater System
Maps
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
During the compliance inspections of the City of San Luis water and wastewater systems, done by the ADEQ, no major deficiencies have been found in the operation and maintenance of the system.
High levels of iron and manganese are not listed as violations, since ADEQ does not enforce secondary standards.
Deficiencies that have been noted by ADEQ are: need to upgrade the wastewater treatment capacity, and the need for an aquifer protection permit .
Environmental and Human Health IndicatorsCompliance with Environmental Norms & Regulations
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Environmental and Human Health Indicators
Water distribution in the area has been interrupted because of deteriorated infrastructure due to high levels of iron and manganese.
Long-term exposure to high levels of iron and manganese may cause public health risk.
ADEQ requires WW treatment capacity planning before a WWTP capacity reaches 85%.
Overflows and back-ups in sewer system infrastructure threaten the public health and environment. Installation of a retention device at 8 th Street and Juan Sanchez Blvd is a temporary solution to control flows to pump stations.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Describe the impacts to the water system infrastructure due to high levels of iron and manganese in water supply. Provide maintenance records and service interruption logs.
Describe the human health effects of exposure to high levels of iron and manganese, asbestos and high levels of lead.
Describe enforceable regulations for line sizing and planning requirements from ADEQ or others.
Environmental, Human Health and Sustainable Development Strategies
Environmental and Human Health:
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Sustainable Development:
Environmental, Human Health and Sustainable Development Strategies
Conduct Sustainable Development Workshops; Baseline Conditions report complete.
Facility Planning to include energy efficiency principles, present worth analysis of alternatives and evaluation of community affordability, as well as water usage assessment.
Develop O&M Plans, administrative improvements and comply with appropriate operator certification requirements.
Update the Water Conservation Plan and conduct public outreach activities to educate community on conservation.
Operator review at 30% design Review need for industrial pre-treatment program.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Priority 1 – Iron and Manganese Treatment
Priority 2 – Address deficiencies in water and wastewater systems to
provide safe and adequate service in accordance to applicable standards.
Technical Approach,Objectives and Funding Plan
Project Objectives
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Recommended Technical Approach
Technical Approach,Objectives and Funding Plan
PDAP Eligible Tasks Facility Planning Environmental Review and
Clearance Financial Analysis Public Participation Program Final Engineering Designs – TBD
(up to 50% not to exceed $500K)
Non-PDAP Eligible Tasks Updated Water
Conservation Plan Rate Study O&M Plans
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Recommended Technical Approach
Technical Approach,Objectives and Funding Plan
Request TA for Planning Phase Tasks of eligible components: Facility Plan Environmental Review and Clearance Preliminary Financial Analysis Preliminary Public Participation Program
Documents to be prepared for consideration by potential funding sources.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Water Infrastructure Finance Authority (WIFA) DWSRF/CWSRF Techncial Assistance Program (TAP)
Arizona Department of Housing (ADH) Community Development Block Grant (CDBG)
North American Development Bank (NADB) Border Environment Infrastructure Fund (BEIF) Institutional Development Program (IDP)
Border Environment Cooperation Commission (BECC) Project Development Assistance Program (PDAP)
Identified Potential Funding Sources
Technical Approach,Objectives and Funding Plan
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Project Sponsor Financial Potential
Technical Approach,Objectives and Funding Plan
Average Monthly Bill:
Water $16.97
WW $12.25
Type 2000 2001 2002
Total operating revenues $1,545,370 $1,675,141 $1,864,789
Total operating expenses* $1,425,116 $1,676,843 $1,984,091
Total non-operating revenues ($228,180) ($215,480) ($137,536)
Net Income (Loss) ($107,926) ($217,182) ($256,838)
*Includes Depreciation of $268,839; $173,494; and $257,454 respectively.
City participated in the development of a Rate Study in 2003 which recommends rate increases through the year 2011.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Institutional Capacity Building
Technical Approach,Objectives and Funding Plan
The City staff have participated in institutional development training through NADB UMI and ADEQ training sources.
The City is currently participating in the development of a Regionalization Study.
The City has suggested a billing and collection study is needed.
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Institutional Capacity Building
Technical Approach,Objectives and Funding Plan
Regulatory Compliance Issues On-going Projects and Planning Existing Planning Project Development and
Funds Management
Outsourcing Operational Capacity Management Capabilities Governance
The Frank M. Tejeda Center may provide assistance by conducting an Institutional Capacity Needs Assessment with the City of San Luis. The Assessment reviews the following areas:
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Approval of reasonable growth rate.
Funding non-PDAP/BEIF eligible projects.
Rate Adjustments
Public Perception – Black Water
Easement/Land Acquisition
Potential Obstacles
Public Participation Strategy
City of San Luis, ArizonaRapid Assessment Process Project Strategic Plan
Public Participation StrategyLocal Politics
A council of seven (7) members, including the mayor and vice mayor
governs the City of San Luis. Local organizations: Chamber of Commerce, San Luis ISD, Rotary Club,
FRONTERA
Socio-Economic Indicators
Approximately ¼ of the population lives below poverty Approximately 50% of the population has less than high school
education. US census describes 5% unemployment; TX Workforce Commission,
2002 Labor Market Information denotes 27.3%.