city of san luis, arizona rapid assessment process project strategic plan city of san luis water...

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


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


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


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


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


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%


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.


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


Existing Water System

Storage Tank @ 8th Avenue

Storage Tanks @ Juan Sanchez and Cesar Chavez

Storage Tank @ 6th Avenue


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


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.


• 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


Existing Waster and Wastewater System

Maps


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


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.


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:


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.


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


Recommended Technical Approach


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


Recommended Technical Approach


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.


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



Project Sponsor Financial Potential


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.


Institutional Capacity Building


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.


Institutional Capacity Building


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:


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


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%.


Project Schedule