Appendix A. DEFINITIONS

DEFINITIONS

The following definitions shall apply to the drought contingency plan and the water conservation plan:

Aesthetic water use: Water use for ornamental or decorative purpose such as fountains reflecting pools, and water gardens.

Commercial and institutional water use: Water which is integral to the operations of commercial and non-profit establishments and governmental entities such as retail establishments, hotels and motels, restaurants, and office buildings.

Conservation: Those practices, techniques, and technologies that reduce the consumption of water, reduce the loss or waste of water, improve the efficiency in the use of water or increase the recycling and reuse of water so that a supply is conserved and made available for future or alternative uses.

Customer: Any person, company, or organization using water supplied by Irving Water Utilities.

Director: Means the director of the department designated by the city manager of the city to enforce and administer the drought contingency plan and the water conservation plan, or the director's designated representative.

Domestic water use: Water use for personal needs or for household or sanitary purposes such as drinking, bathing, heating, cooking, sanitation, or for cleaning a residence, business, industry, or institution.

Drought contingency plan: A strategy or combination of strategies for temporary supply management and demand management responses to temporary and potentially recurring water supply shortages and other water supply emergencies. A drought contingency plan may be a separate document identified as such or may be contained within another water management document(s).

Even number address: Street addresses, box numbers, or rural postal route numbers ending in 0, 2, 4, 6, or 8 and locations without addresses.

Hand-held hose: A typical gardening hose or any flexible tube of plastic, rubber, etc., for conveying water and other fluids that can be transported and utilized by an individual.

Industrial water use: The use of water in processes designed to convert materials of lower value into forms having greater usability and value.

Irrigation use: The use of water for the irrigation of crops, trees and pastureland, including, but not limited to, golf courses and parks which do not receive water through a municipal distribution system.

Landscape irrigation use: Water used for the irrigation and maintenance of landscaped areas, whether publicly or privately owned, including residential and commercial lawns, gardens, golf courses, parks, and rights-of-way and medians.

Municipal per capita water use: The sum total of water diverted into a water supply system for residential, commercial, and public and institutional uses divided by actual population served.

Municipal use: The use of potable water within or outside a municipality and its environs whether supplied by a person, privately owned utility, political subdivision, or other entity as well as the use of sewage effluent for certain purposes, including the use of treated water for domestic purposes, fighting fires, sprinkling landscaped medians, flushing sewers and drains, watering parks and parkways, and recreational purposes, including public and private swimming pools, the use of potable water in industrial and commercial enterprises supplied by a municipal distribution system without special construction to meet its demands, and for the watering of lawns and family gardens.

Non-essential water use: Water uses that are not essential nor required for the protection of public, health, safety, and welfare, including:

(a)

Irrigation of landscape areas, including parks, athletic fields, and golf courses, except otherwise provided under this plan;

(b)

Use of water to wash any motor vehicle, motorbike, boat, trailer, airplane, or other vehicle;

(c)

Use of water to wash down any sidewalks, walkways, driveways, parking lots, tennis courts, or other hard-surfaced areas;

(d)

Use of water to wash down buildings or structures for purposes other than immediate fire protection or preparation for painting or maintenance;

(e)

Flushing gutters or permitting water to run or accumulate in any gutter or street;

(f)

Use of water to fill, refill, or add any indoor or outdoor swimming pools or jacuzzi-type pools;

(g)

Use of water in a fountain or pond for aesthetic or scenic purposes except where necessary to support aquatic life;

(h)

Failure to repair a controllable leak(s) within a reasonable period after having been given notice directing the repair of such leak(s); and

(i)

Use of water from hydrants for construction purposes or any other purposes other than fire fighting.

Non-potable water: Water that is not intended or suitable for drinking and has not been approved for human consumption.

Odd numbered address: Street addresses, box numbers, or rural postal route numbers ending in 1, 3, 5, 7, or 9.

Pollution: The alteration of the physical, thermal, chemical, or biological quality of, or the contamination of, any water in the state that renders the water harmful, detrimental, or injurious to humans, animal life, vegetation, or property, or to the public health, safety, or welfare, or impairs the usefulness or the public enjoyment of the water for any lawful or reasonable purpose.

Potable water: Water that is suitable for drinking and the supply has been investigated and approved.

Public water supplier: An individual or entity that supplies water to the public for human consumption.

Regional water planning group: A group established by the Texas Water Development Board to prepare a regional water plan pursuant to Texas Water Code § 16.053.

Retail public water supplier: An individual or entity that for compensation supplies water to the public for human consumption. The term does not include an individual or entity that supplies water to itself or its employees or tenants as an incident of that employee service or tenancy when that water is not resold to or used by others.

Reuse: The authorized use of water that remains unconsumed after the water's use for its original purpose, for one (1) or more beneficial purposes and before that water is either disposed of or discharged or otherwise allowed to flow into a watercourse, lake, or other body of state-owned water.

Soaker hose: A hose typically made of rubber or plastic that allows water to pass through pores of the hose and drip from the hose, not spray from the hose.

Water conservation plan: A strategy or combination of strategies for reducing the volume of water withdrawn from a water supply source, for reducing the loss or waste of water, for maintaining or improving the efficiency in the use of water, for increasing the recycling and reuse of water, and for preventing the pollution of water. A water conservation plan may be a separate document identified as such or may be contained within another water management document(s).

Wholesale public water supplier: An individual or entity that for compensation supplies water to another for resale to the public for human consumption. The term does not include an individual or entity that supplies water to itself or its employees or tenants as an incident of that employee service or tenancy when that water is not resold to or used by others. (The Dallas Water Utilities is the current wholesale public water supplier to the City of Irving.)

(Ord. No. 2011-9302, § 1, 12-8-11)

APPENDIX B.\WATER UTILITY PROFILE DATA

CITY OF IRVING WATER UTILITY PROFILE DATA

City of Irving, Texas
P.O. Box 152288
Irving, TX 75015-2288
Phone: [phone]
Fax: [phone]

I.

CUSTOMER DATA

A.

Location, population and service area data.

1.

Location and description of service area: The City of Irving is located in Dallas County, primarily east of Dallas-Fort Worth International Airport. The City of Irving service area generally coincides with its city limits. Irving is completely surrounded by adjacent jurisdictions and has little or no area left to expand its physical boundary.

2.

Service area (square miles): ..... 67.9

3.

Current population of service area: ..... 215,893

4.

Current population served by utility (2009):

Water: ..... 215,893

Wastewater: ..... 215,893

5.

Population served by water utility for previous five (5) years:

Year	2004	2005	2006	2007	2008
Population	196,750	199,298	202,750	205,600	210,150

 

6.

Projected population for next three (3) planning horizons:

Year	2015	2025	2035
Population	229,153	247,917	262,863

 

*Projections from Recycled Water Implementation Plan, December 2008

B.

Active connections.

1.

Current number of active water meter connections by user type during Fiscal Year 2007-08. (Apartments in Irving are billed as a separate use type, as indicated below).

User Type	Metered	Not Metered	Total
Residential	36,317	0	36,317
Apartment	1,030	0	1,030
Commercial/Industrial	5,659	0	5,659

 

2.

Net number of new meter connections per year for previous five (5) fiscal years:

User Type	2003-04	2004-05	2005-06	2006-07	2007-08
Residential	372	266	853	727	548
Apartment	10	4	22	13	3
Comm./Ind.	214	101	136	117	122

 

II.

WATER SUPPLY SYSTEM DATA

A.

Water supply sources.

Most of Irving's water is supplied through Irving's water rights in Jim Chapman Lake. This water is treated by the City of Dallas under the provisions of a water treatment services contract.

The City of Irving also purchases some of its water supply from the City of Dallas under a wholesale services contract. The current wholesale supply contract with Dallas does not stipulate a maximum amount of available water and essentially allows Irving to receive supply from Dallas as required to meet its water demand.

Irving holds water rights in Jim Chapman Lake and is authorized to divert fifty-four thousand (54,000) acre-feet per year. Irving began using these water rights in June 2003.

B.

Treatment and distribution system.

1.

Treatment capacity. Treatment of all water is provided by the City of Dallas.

2.

Storage capacity.

Elevated: 15.5 million gallons

Ground:   52.0 million gallons

3.

Description of water system. The City of Irving water system includes four (4) pumping stations, ten (10) ground reservoirs, and eight (8) elevated tanks. All water received from the City of Dallas is either through the water treatment contract or the wholesale services contract and is metered and delivered to the Hackberry and MacArthur Pumping Stations, where it is repumped to the Irving distribution system. There are three (3) separate pressure zones. A schematic of the Irving water system is shown on Figure 1.

III.

WATER USE DATA FOR SERVICE AREA

A.

Water pumped and sold.

1.

Water pumped - Total amount of water delivered to distribution system for the last five (5) fiscal years (in 1,000 gallons).

Month	2003-04	2004-05	2005-06	2006-07	2007-08
October	1,297,022	1,121,130	1,534,090	1,336,990	1,340,540
November	1,054,390	863,410	1,258,920	1,144,090	1,179,610
December	1,014,030	814,100	1,067,570	946,510	980,860
January	933,890	736,660	1,060,150	867,270	951,280
February	810,910	660,170	852,610	802,800	839,050
March	808,470	781,330	999,210	1,011,650	877,990
April	960,486	1,052,970	1,267,840	974,230	967,900
May	1,149,390	1,239,150	1,415,370	1,027,120	1,147,030
June	1,178,130	1,454,060	1,640,600	1,100,780	1,424,580
July	1,414,260	1,765,690	1,755,020	1,416,920	1,971,620
August	1,474,190	1,763,220	1,837,780	1,585,360	1,715,250
September	1,289,400	1,717,590	1,468,140	1,444,569	1,381,180
Total	13,384,568	13,969,480	16,157,300	13,658,280	14,776,890
Peak Day	7/23/04	9/2/05	8/2/06	8/28/07	7/26/08
Peak Day Use (MGD)	57	70	74	62	70

 

2.

Annual water sales - Amount of water sold (in 1,000 gallons) as recorded by individual meter sales records.

Fiscal Year	Residential	Apartment	Com./Ind.	Total
2003-04	3,680,777	3,991,131	4,684,172	12,356,080
2004-05	4,007,592	3,976,753	4,937,750	12,922,095
2005-06	4,902,785	4,227,955	5,821,468	14,952,208
2006-07	3,599,513	3,791,001	4,624,793	12,015,307
2007-08	3,994,595	3,750,454	5,164,836	12,909,885

 

3.

Monthly water sales - Water sales by user category for Fiscal Year 2007-2008 based on customer meters (in 1,000 gallons).

Month	Residential	Apartments	Com./Ind.	Total
October	345,590	376,965	476,650	1,199,205
November	328,374	339,103	459,876	1,127,353
December	371,583	377,500	518,659	1,267,742
January	160,174	206,278	162,191	528,643
February	239,478	265,899	299,784	805,161
March	224,477	270,923	293,851	789,251
April	226,941	252,298	285,958	765,197
May	251,097	274,141	328,298	853,536
June	320,937	290,230	379,936	991,103
July	464,713	335,839	547,299	1,347,851
August	603,484	395,903	741,238	1,740,625
September	457,747	365,375	671,096	1,494,218
Total	3,994,595	3,750,454	5,164,836	12,909,885

 

4.

High volume customers (treated water) - Annual use for ten (10) highest volume retail customers (Fiscal Year 2007/08).

Customer	1,000 gallons/year	Type of Customer
Dr. Pepper	333,365	Soft Drink Bottler
Irving ISD	160,102	Public School
American Beverage	128,855	Soft Drink Bottler
Teccor Electronics	94,678	Electronic Manufacturer
Las Colinas Association	93,339	Landowners' Association
Valley Ranch Association	85,342	Landowners' Association
Regal Park Apartments	69,541	Apartment Complex
Four Seasons Resort	66,169	Hotel
University of Dallas	51,783	University
The Cabochon Apartments	48,135	Apartment Complex

 

5.

Wholesale customers. Irving has no wholesale water customers.

IV.

CALCULATIONS

A.

Unaccounted water: Percent unaccounted water for previous five (5) years:

Unaccounted Water	2003-04 (1,000 gal.)	2004-05 (1,000 gal.)	2005-06 (1,000 gal.)	2006-07 (1,000 gal.)	2007-08 (1,000 gal.)
Treated Water Deliveries	13,384,568	13,969,480	16,157,300	13,658,280	14,776,890
Total Sales	12,356,080	12,922,095	14,952,208	12,015,307	12,909,885
Estimated Fire Use	N/A	N/A	4,061	5,027	4,507
Estimated Line Flushing	350,000	126,568	379,655	735,358	275,763
Wash trucks and Tanks Drained	N/A	12,874	23,328	9,728	3,010
Water Metered But Not Sold	213,192	258,178	189,642	41,499	231,497
Unaccounted Water	465,296	649,765	608,406	851,361	1,352,228
% Unaccounted	3.48%	4.65%	3.77%	6.23%	9.15%
Goal for % Unaccounted	<10%	<10%	<10%	;<10%	<10%

 

B.

Peak to average daily use ratio.

Average daily flow for the last five (5) years: This is calculated by dividing the amount of water pumped by the number of days in a year.

Peak-to-average-ratio for the last five (5) years: This is calculated by dividing the peak day flow by the average daily flow.

Year	Average Daily Flow (MGD)	Peak Day Flow (MGD)	Ratio
2003-04	36.7	57.4	1.56
2004-05	38.2	70.4	1.84
2005-06	44.3	73.7	1.66
2006-07	37.4	61.6	1.65
2007-08	40.5	69.6	1.72

 

C.

Per capita water use. Municipal per capita water use is expressed as gallons per person per day (gpcd) and is defined as total water sales (including industrial sales) divided by the population served, divided by the number of days in the year. (As noted under Item III.A.2, data is not available to separate industrial metered use from commercial metered use. However, based on available data, industrial use accounts for less than seven (7) percent of total metered water sales in Irving.)

Municipal per capita use for last five (5) years (Including Industrial Sales):

Year	Population	Total Diverted (or Treated) ;(1,000 gal)	Industrial Sales (1,000 gal)	In-City Municipal Use (1,000 gal)*	Municipal per Capita Use(gpcd)
2003-04	196,750	13,384,568	Unknown	12,356,080	172
2004-05	199,298	13,969,480	427,879	12,922,095	177
2005-06	202,750	16,157,300	502,084	14,952,208	202
2006-07	205,600	13,658,280	547,001	12,015,307	160
2007-08	210,150	14,776,890	674,333	12,909,885	168

 

* Includes Industrial Sales (All water pumped)

Residential per capita usage for last five (5) years:

Year	Population	Residential Water Sales (1,000 gal)	Residential & Apartment per Capita Use (gpcd)
2003-04	196,750	7,671,908	107
2004-05	199,298	7,984,345	109
2005-06	202,750	9,130,740	123
2006-07	205,600	7,390,514	98
2007-08	210,150	7,745,049	101

 

D.

Seasonal water use. Seasonal water use is the difference between the base (winter) daily per capita use and the summer daily per capita use.

Base daily per capita use is the average monthly diversions for December, January and February divided by the population, then divided by ninety (90) (or ninety-one (91) during a Leap Year).

Summer daily per capita use is the average monthly diversions for June, July and August divided by the population, then divided by ninety-two (92).

Seasonal water use for the last five (5) years:

Year	Population	Base per Capita Use (gpcd)	Summer per Capita Use (gpcd)	Seasonal Use (gpcd)
2003-04	196,750	156	225	69
2004-05	199,298	122	272	150
2005-06	202,750	163	281	118
2006-07	205,600	141	217	76
2007-08	210,150	147	264	117

 

V.

WASTEWATER UTILITY SYSTEM

A.

Wastewater system data.

1.

Description of wastewater system. The City of Irving is responsible for collection of wastewater throughout the city. Irving is a member of the Trinity River Authority (TRA), which provides treatment for all wastewater generated in the city. All wastewater is conveyed to the TRA Central Regional Wastewater Treatment Plant, which also serves numerous other cities in the Dallas-Fort Worth metroplex.

VI.

UTILITY OPERATING INFORMATION

A.

Water rates and rate structure. The city's current water rates are compiled in a progressive rate structure which includes slightly higher unit rates for increased use during summer months. The same rate structure applies to all customer classifications.

The current water rate structure is as follows:

Monthly Service Charge
First 3,000 gallons of water, or less
5/8 " and ¾" Meter	$7.99
1" Meter	$9.58
1½" Meter	$13.59
2" Meter	$19.17
3" Meter	$30.86
4" Meter	$43.21
6" Meter	$75.60
8" Meter	$95.48
10" Meter	$138.79
12" Meter	$206.66
Residential water rates:
Next 7,000 gallons	$3.27/1,000 gal.
Next 10,000 gallons	$3.44/1,000 gal.
All over 20,000 gallons:
October-May consumption	$3.59/1,000 gal.
June-September consumption	$3.90/1,000 gal.
Commercial/Apartment water rates:
Next 7,000 gallons	$3.27/1,000 gal.
Next 10,000 gallons	$3.44/1,000 gal.
All over 20,000 gallons:
October-May consumption	$3.59/1,000 gal.
June-September consumption	$3.80/1,000 gal.
Large Industrial water rates:
All over 3,000 gallons	$3.07/1,000 gal.

 

(Ord. No. 2011-9302, § 1, 12-8-11)