Fort Walton Beach Resolution — 2008-10-Adopting 2008 EAR — reading text

average daily basis. If the growth rate in the City' s service area increases within the next ten years beyond current projections, it may be possible that the City will be required to request an increase in the CUP withdrawal limits. Based on the current and projected water demands, a surplus of approximately 500, 000 gallons per day will exist in 2017, which is capable of serving an additional 3,290 persons. If the proposed population density increases are approved and realized within the next ten years, the surplus will be depleted. However, the surplus is based on the withdrawal limits of the CUP. 8. 1 ABILITY TO MEET SYSTEM DEMAND NEEDS The water system should provide storage volume equal to four hours multiplied by the peak hourly demand. Assuming peak hourly demand is 2. 0 times average daily demand, this would equate to 5, 794,000 gallons. The City's elevated and ground storage tanks have a capacity of 3, 535, 000 gallons, and the pumping capacity of the nine wells is 4,377, 600 gallons for a total of 7, 912,600 gallons. Thus, the system presendy has sufficient storage to meet expected peak hourly demands through year 2017. 8. 2 ABILITY TO PRODUCE REQUIRED FIRE FLOW The present fire flow supports a citywide ISO rating of 3 which is outstanding for a city the size of Fort Walton Beach. The City' s Utilities Department and Fire Department are working together to maintain or increase this rating by requiring all new development and redevelopment to upgrade fire fighting infrastructure to current standards. The City also has an ongoing Capital Improvement Program to upgrade all 2- 1/ 4 inch water mains to 6- inch or larger. During each project, new fire hydrants are installed on the new mains to provide a higher level of fire flow service. At least 1, 000 linear feet of new 6- inch water mains are installed each year. REGIONAL WATERSUPPLYPLi\N 38 CTIY OF FORT WALTON BEACH  The construction of the two new elevated storage tanks: 750,000- gallons at the Golf Club and 500,000- gallons in the Downtown area have also had a positive effect on the fire flow capacity of the existing system. The new Downtown elevated storage tank increased the static pressures in the southern and eastern portions of the City by almost 20 pounds per square inch in some areas. 8.3 ABILITY TO MEET AVERAGE DAILY USE CRITERION The Horida Department of Environmental Protection recommends that all public water systems have water storage volume equal to the system' s average day demand. There are no requirements for this, only a recommendation; however, most public water systems consider meeting this criterion a goal of the system. The projected average daily demand for the year 2017 is 3, 106,000 gallons and the capacity of the elevated and ground storage tanks is 3, 535,000 gallons, thereby exceeding the regulatory agency's recommended standard. SECTION 9 - PROPOSED IMPROVEMENTS AND COSTS 9. 1 WATER DISTRIBUTION SYSTEM NEEDS Currently, the City is addressing all of the water distribution system needs by continuing to implement the ongoing Capital Improvement Programs of replacing all water mains less than 6- inch in diameter and changing out existing water meters to reduce unaccounted for water. Each year, the City' s Utilities staff projects to replace a minimum of 1, 000 linear feet of smaller diameter water mains. Already in FY 2007- 08, 450 linear feet of 2- 1/ 4 inch water main was replaced on Oak Street SE with new 6- inch PVC pipe at a cost of $6,500. Also in FY 2007- 08, City personnel will replace over 100 commercial water meters that are 2- inch and larger at a cost of $103, 000. In the next four years, all of the remaining 9,000+ residential water meters will be replaced. Future plans call for the replacement of an existing 6- inch cast iron water main that lies within the paved surface of U.S. Highway 98 with a new 12- inch water main to provide better water service for future development. The 6- inch cast iron water main is over 40 years old and has experienced numerous breaks in the past few years. A portion of the new 12- inch water main will be installed by ongoing new developments along the U.S. Highway 98 corridor as a requirement of their development order. In September 2007, 800 linear feet of the 12- inch water main was installed by the Presidio Condominium development at a cost of 23,200 to the City. 9. 2 WATER SUPPLY IMPROVEMENTS In the last two years, the City completed a capital project to install 13, 500 linear feet of new 18- inch ductile iron water transmission main that connected the new 750,OOO- gallon elevated storage tank at the Golf Club to the existing water system on Beal Parkway. This main provides a redundant source of water supply from the Golf Club area to the Downtown area. The total project cost for this effort was $ 2,571, 408. The City also has an ongoing Capital Improvement Program that rehabilitates at least one well per year. In FY 2007- 08, Well No. 2 will be rehabilitated at a projected cost of $60, 000. REGIONAL WA1ER SUPPLY PLAN 39 CITY OF FORT WALTON BEACH 9.3 WATER STORAGE IMPROVEMENTS There are no current or future water storage improvements planned for the City's system. Two years ago, the construction of two new elevated storage tanks was completed to increase the storage capacity of the water system by 850,000 gallons. Two 100,000- gallon tanks were immediately abandoned and one 200,000- gallon tank will be converted to a reclaimed water elevated storage tank in the future. The total project cost for this effort was $ 1, 952,644. SECTION 10 - ALTERNATIVE WATER SUPPLY DEVELOPMENT The City of Fort Walton Beach continues to plan for future water supply needs by exploiting existing naturally occurring sources and by implementing various management techniques to conserve and maximize its current potable supply. Over the past several years, the City has worked closely with the Regional Utility Authority, neighboring public utility agencies, regulatory agencies, and various engineering/ consulting !inns to address future water supply concerns on a local and regional level. While it is important that the City address its water supply needs independent of other utility agencies, close cooperation among neighboring utilities is vitally important to ensure the future integrity of our finite water resources. To this end, the City is committed to protecting its existing water resources, efficiendy planning for future needs, and partnering with area utility agencies to ensure the reliability and sustainability of the regional potable supply. Starting in the late 1990s, the City began exploring the possibility of utilizing water resources outside its corporate boundaries to supplement its existing Floridan supply. However, a lack of primacy and jurisdictional authority led to difficulties securing the necessary pennits to develop this source. Recognizing these hurdles, the City began discussions with Okaloosa County to cooperatively develop and fund a mid- County well system and transmission main to provide supplemental potable water to the southern end of Okaloosa County, including the City of Fort Walton Beach. Successful negotiations for a cooperative endeavor never materialized and the City is no longer actively pursuing a partnership with Okaloosa County for this supplemental source. However, the City still considers the mid-County well field as a reliable future source and could possibly pursue a wholesale agreement for supplemental water for its service area should existing potable supplies fail to meet future demands. The City does consider the regional Sand and Gravel Aquifer as a suitable alternative to supplement its future water supply needs. In 1999, the City, in partnership with the City of Mary Esther, commissioned a study to detennine the of the Sand and Gravel Aquifer as a supplemental water source. Fabre suitability Engineering Incorporated was selected for this effort and the investigation concentrated on a 200- acre tract of land in the north end of the City currendy occupied by the City's 36- hole municipal golf club. The results of this study, published in April 2000, identified the Sand and Gravel fonnation in this area as suitable to provide up to 1.3 million gallons per day of supplemental potable water. The development of this source would, however, require modifications to the City's treatment capability in order to remove higher than nonnal amounts of iron and manganese in the source water. Furthennore, the City would need to address well-head protection requirements and address " public perception" issues related to the use of reclaimed water on the property for irrigation. To date, this source has not been developed as a supplemental water supply, but the source is suitable for development in the future should the need arise. As referenced previously in this report, the City of Fort Walton Beach has steadily reduced its annual withdrawal from the Floridan Aquifer since the late 1980s. Since 1988, annual withdrawals have Although small reductions in the decreased approximately 250/0, with a reduction of over 100/0 since 2000. overall population within the City contribute to this reductio~ withdrawal reductions of this magnitude REGIONAL WATER SUPPLY PLAN 40 CITY OF FORT WALTON BEACH would not be possible without the implementation of various conservation programs and the development of a reclaimed water system to eliminate non-potable uses. The City' s existing reclaimed water system continues to deliver an average of over 500, 000 gallons per day of treated sewage effluent for non-potable uses such as irrigation, and this system has the potential to expand depending on the City' s decision to update its Reclaimed Water Master Plan. A decision will be made regarding the commission of this study later in 2008 after the City explores the option of combining sewage treatment operations with Okaloosa County. In addition to the existing reclaimed water system, the City jointly developed a reclaimed water system with Hurlburt Field in 2007. The first phase of this system was installed last year; however, the system has yet to be activated. Both entities continue to explore funding opportunities to complete the final phase of the project which will connect areas of Hurlburt Field with the western end of the City in a joint reuse distribution network. Upon completion, the system has the capability to provide in excess of 200,000 gallons per day of treated effluent for non-potable uses such as irrigation, process make- up water, cooling tower water, and other uses. Should the City elect to continue providing wastewater treatment services to its residents versus outsourcingthis activity to Okaloosa County, consideration shall be given to developing a Deep- well Injection system or Aquifer Storage and Recovery (ASR) system for reclaimed water disposal. As referenced in the District' s September 2006 Regional Water SupplY Plan Update, ASR is viewed as water supply management technique worthy of consideration. The City' s interest in ASR stems from the cost associated with leasing large tracts of land from the Department of Defense for use as effluent irrigation sites. In order to reduce this cost, the City must reduce its leased footprint and ASR offers a mechanism for accomplishing this