Service Area and Supply
The City of Craig Water Department provides potable drinking water to the citizens of the city and to a limited number of Moffat County residents who live or have businesses near the corporate limits of the city. The 2000 Census established the City's population at just over 9000, and the Craig Water Department provides water to these people through 2941 residential metered units, 358 non-residential units, and 192 master meters which serve an additional 1349 residential units. Water connections outside of the corporate limits of the city ( Moffat County ) include over 100 residential units and 3 non-residential units.
The Craig Water Treatment Plant, built in 1983, has a rated capacity of 9.0 million gallons per day ( MGD ). In addition, the original water treatment plant has been maintained in operating condition and serves as a backup to the newer facility. The old plant has a capacity of 2.4 MGD and can operate in conjunction with the newer plant if necessary.
With an average demand of 1.8 MGD, the water treatment plant is more than capable of meeting the water needs of the consumers. Water demand in the summer can reach as high as 6 million gallons per day. During the winter months, however, demand may be as low as 500,000 gallons per day.
Storage and Distribution
The City of Craig's distribution system contains approximately 68 miles of transmission mains or pipelines. Pipeline materials consist primarirly of Ductile Iron ( 60% ) and PVC ( 40% ), with sizes ranging from 4" to 20". There are more than 1000 valves located in the system that permit our distribution crew to isolate sections of pipeline during repairs, maintenance, and improvements. During the summer of 1987, the first lines were laid to replace antiquated mains within the system. In an ongoing water main replacement program, the majority of leaded cast iron pipe has been replaced with more servicable PVC pipe. An average of $250,000 is allocated for water main replacement each year.At the outset of this program, an average of 35-40 water main breaks were being reported each year. The water department has seen that number decrease to between 5-10 per year.
The City of Craig has eight storage tanks with a total capacity of 7.5 million gallons. Most are above ground free-standing metal tanks built in the late 70's and early 80's. Tanks in seperate areas have been designed to simplify arrangements for feeding the distribution system in multiple ways to minimize any interuption of service in the event of a water main break. Every tank in the distribution system is isolated and taken out of service every other year to be cleaned. A program was also established to repaint and refurbish each tank. Within the last tens years all of the freestanding tanks have been repainted. Cathodic Protection has also been installed in many tanks to prevent further damage and maintain structural integrity.
Pump Stations and Pressure Zones
The City's water system must serve various areas of the City which have differences in elevations. Pressure zones were developed as the City expanded and as new subdivisions were being built. Differences in elevations mandated four distinct pressure zones within the City. Storage tanks which are situated to service these areas are also at different elevations and need to be isolated in order to maintain water pressure. Homes which are located near the storage tanks and in the high end of the pressure zone will have lower pressure than those homes located in the lower end of each zone. Average water pressure in these four zones is 65 psi, and those services with lower water pressure usually have a booster system installed within the household to increase pressure.
The City utilizes five high service pumps at the water treatment plant to pump water into the distribution system. Five pump stations with a total of fourteen pumps are located throughout the city. These pump stations then transport the water to storage tanks at higher elevations. From there water is supplied to homes and businesses by gravitational feed. These pumps are controlled by the operators at the plant to insure that an adequate supply of water is available at all times.
Water Usage and Fire Protection
The City of Craig has approximately 855 fire hydrants located within the City limits. Our distribution crew has an ongoing program to replace ten to fifteen older model fire hydrants per year. These replacements are above and beyond those hydrants installed during the City's water main replacement program. Fire hydrant valves are exercisesd on a routine basis to insure proper operation. A recent survey was conducted to determine the fire insurance classification for the City. This evaluation confirmed that a class 6 fire rating continues to apply. The survey consisted of selecting 15 residential and business sites within the City and testing the water flow and pressure at each individual hydrant. All testing sites passed the requirements for adequate fire proteciton. The City received an excellent rating. and achieved a total of 35 credits out of a total of 40 attainable for an adequate water supply available for fighting fires.
The City of Craig Water Treatment Plant has a rated plant capacity of 9.0 million gallons a day (MGD). In 1987 water production was at 350 MG per year. Producation has steadily increased over the years. In 2001, 652 million gallons were produced at the plant. Normally, 1,000,000 gallons are produced on an average day during the winter months. And during the summer months of 2000the plant averaged 3.5 million gallons a day. Also in 2000, daily production was as low as 0.5 MGD during the winter months and as high as 5.0 MGD during the hot summer months. In 1997 our lowest production day was 668,000 gallons in January, and the plant peaked with 6 million gallons produced on a hot day in July! That was the plant's highest production year with 733,000,000 gallons produced.