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HomeMy WebLinkAbout2004 IBT Annual Report Charlotte-Mecklenburg Utilities Annual Report on Interbasin Transfer Calendar Year 2004 Charlotte Mecklenburg Utilities (Utilities) operates the water and wastewater system that serves the City of Charlotte, Cornelius, Davidson, Huntersville, Mint Hill, Matthews, Pineville, and much of the unincorporated areas of Mecklenburg County. This utility system, covering most of Mecklenburg County, is divided between two river basins as designated by NC General Statutes. The western portions of the system are within the Catawba River basin and the eastern portion is within the Rocky River basin. Water that is transferred from the Catawba River basin to the Rocky River basin that is not returned to the Catawba is defined as interbasin transfer (IBT). Water is withdrawn from the Catawba River basin at two locations. An intake at Lake Norman sends water to the North Mecklenburg Water Treatment Plant. A second intake at Mountain Island Lake sends water to the Franklin Water Treatment Plant and the Vest Water Treatment Plant. Potable water from these three plants is delivered through an interconnected distribution system to customers throughout Mecklenburg County. Utilities treats wastewater at five advanced wastewater treatment plants (WWTP’s) which discharge into small streams in Mecklenburg County. Four of the streams are tributary to the Catawba River basin and one (Mallard Creek) is tributary to the Rocky River basin. Utilities also sends wastewater from several portions of Mecklenburg to the Rocky River Regional Wastewater Treatment Plant (RRRWWTP) operated by the Water and Sewer Authority of Cabarrus County (WSACC). The RRRWWTP discharges in the Rocky River. Utilities transfers treated, potable water to the City of Concord through several metered connections to their water system. Water is transferred as an emergency back-up to Concord’s routine supply which comes from Lake Howell and several smaller reservoirs. All of these reservoirs are within the Rocky River basin. Wastewater from Concord is treated at the RRRWWTP. Utilities’ agreement with Concord is that water can be supplied to them subject to availability from the Charlotte-Mecklenburg system and subject to regulatory constraints including IBT and Federal Energy Regulatory Commission (FERC) limitations. Charlotte Mecklenburg Utilities’ petition to increase the amount of water transferred from the Catawba basin to the Rocky River basin was approved by the North Carolina Environmental Management Commission (EMC) on March 14, 2002. The petition allows Utilities to transfer up to 33 million gallons per day (mgd) from the Catawba River basin to the Rocky River basin. The approved petition requires Utilities to report daily IBT amounts annually to the North Carolina Division of Water Resources until such time as the transfer amount exceeds 80% of the authorized amount, which would be 26.4 mgd. Once that amount is exceeded, Utilities is required to report monthly. To date, Charlotte-Mecklenburg Utilities has not exceeded 80% of the authorized IBT amount. Table 1 below summarizes 2004 daily IBT amounts. The table considers the daily amounts of water delivered from the Catawba basin to customers within Mecklenburg County based on combined pumping records from the three water treatment plants. The values shown in Table 1 include the amount of water transferred to the City of Concord through metered connections. Transfers to Concord are included as average daily values over the billing period which is approximately monthly. The full amount transferred to Concord is IBT since none is returned from Concord to the Catawba basin. Daily wastewater treatment plant discharges are used to determine how much flow is returned to the Catawba basin and how much is discharged directly to the Rocky River basin from Utilities’ Mallard Creek WWTP. Wastewater flows sent to RRRWWTP (and thereby discharging into the Rocky River basin) are included in Table 1 as average daily flows based on wastewater flow meter readings which are made approximately monthly. Consumptive use within the Rocky River basin is considered IBT according to North Carolina statutes. Consumptive use occurs due to septic tank systems, lawn irrigation, inclusion of water in packaged products, evaporation, and other uses. The amount of this consumptive use is estimated based on criteria described in Utilities’ IBT petition. Combination of the data allows the calculation of the daily IBT amount. Table 1 presents these amounts both as a percentage of the authorized amount and as a daily transfer amount in mgd. The data is also presented in two charts which depict graphically the IBT amounts. The data indicates that the maximum amount of IBT for year 2004 occurred on May 26, 2004, and was 19.99 mgd, or 60% of the authorized maximum day value of 33 mgd. The average IBT for 2004 was 13.18 mgd, which is about 40% of the authorized maximum day value. 2004 IBT % of Permitted Value 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Jan-04 Feb-04 Mar-04 Apr-04 May-04 Jun-04 Jul-04 Aug-04 Sep-04 Oct-04 Nov-04 Dec-04 Date The graph below indicates historic IBT trends for Charlotte-Mecklenburg Utilities. IBT History 0 5 10 15 20 25 2002 2003 2004 Calendar Year Mi l l i o n G a l l o n s / D a y Max. Day IBT Avg. Day IBT Condition 1 of Utilities’ IBT certificate requires Mecklenburg County to summarize progress in implementation of watershed management approaches of the Surface Water Improvement and Management Program (S.W.I.M. program). This summary follows: Basic countywide water quality modeling capabilities have been developed and are being upgraded to include advanced modeling capabilities for planning/land development. A fully functioning water quality model has been developed for McDowell Creek in the Town of Huntersville where rapidly degrading water quality conditions have been experienced due to growth within the watershed. Outputs from the McDowell model were used to develop a watershed based approach for identifying alternative management strategies targeted toward preventing further water quality degradation. As a result of this effort, a performance based land development ordinance was developed that relies on Low Impact Design (LID) strategies to protect water quality from future development activities, which was adopted by the Town of Huntersville on February 17, 2003. Water quality modeling and watershed based planning initiatives are also being used in the design of two (2) large mixed use developments along Lake Wylie to protect water quality from land development activities. Other S.W.I.M. initiatives and actions in 2004 include: • Secured grant funds, obtained properties and developed design drawings to retrofit water quality BMP’s in the McDowell Creek watershed; • Implemented fecal coliform TMDL measures in Little Sugar, Sugar, and McAlpine Creek basins; • Development of a draft Low Impact Development (LID) ordinance for the Town of Mint Hill designed to protect water quality conditions in Goose Creek from non-point source pollutants associated with post- construction storm water runoff; and • Obtained grant funds and began design of pilot LID structures in the Goose Creek basin to demonstrate compliance with the draft LID ordinance. Condition 2 of Utilities’ IBT certificate requires a report on the stakeholder process to investigate water quantity control from single-family development and water quality control for all development until that process is completed. The condition suggests that the feasibility of single-family detention should be considered along with any needed ordinance revisions. This report follows: A water quality ordinance adopted by the Town of Huntersville in 2003 provides water quality controls for single-family development as well as establishes requirements for single-family detention within the Town limits and within their zoning jurisdiction. This geographic area spans Mecklenburg County from west to east and includes significant areas of the Catawba River (Mountain Island Lake) watershed and the Rocky River basin. The Huntersville Ordinance was designed to address both water quality and detention. The basic objectives of the Huntersville Ordinance are: ¾ Minimize increases in storm water runoff from development or redevelopment in order to reduce flooding, siltation and streambank erosion, and maintain the integrity of stream channels. ¾ Utilize Low Impact Design (LID) strategies to minimize increases in non-point source pollution caused by storm water runoff from development or redevelopment. The goal of LID is to develop site design techniques, strategies, and BMPs to store, infiltrate, evaporate, retain, and detain runoff on the site to more closely replicate pre-development runoff characteristics and to better mimic the natural and unique hydrology of the site thereby limiting the increase in pollutant loads caused by development. ¾ Minimize the total volume of surface water runoff that flows from any specific site during and following development in order to replicate pre-development hydrology to the maximum extent practicable. ¾ Reduce storm water runoff rates and volumes, soil erosion and non-point source pollution, to the extent practicable, through storm water management controls (BMPs) and to ensure that these management controls are properly maintained and pose no threat to public health or safety. The performance criteria contained in the Huntersville Ordinance are : ¾ All storm water treatment systems used to meet these Performance Criteria shall be designed to achieve average annual 85% Total Suspended Solids (TSS) removal for the developed area of a site. Areas designated as open space that are not developed do not require storm water treatment. All sites must employ LID practices to control and treat runoff from the first inch of rainfall. ¾ LID practices or a combination of LID and conventional storm water management practices shall be used to control and treat the increase in storm water runoff volume associated with post-construction conditions as compared with pre-construction (existing) conditions for the 2-year frequency, 24-hour duration storm event in the Rural and Transitional Zoning Districts. For all other Zoning Districts, LID practices or a combination of LID and conventional storm water management practices shall be used to control and treat the increase in storm water runoff volume associated with post-construction conditions as compared with pre-construction (existing) conditions for the 1-year frequency, 24-hour duration storm event. This may be achieved by hydrologic abstraction, recycling and/or reuse, or other accepted management practice as described in Section 6 of the Huntersville Water Quality Design Manual. ¾ Where any storm water BMP employs the use of a temporary water quality storage pool as a part of its treatment system, the drawdown time shall be a minimum of 48 hours and a maximum of 120 hours. ¾ Peak storm water runoff rates shall be controlled for all development above 12% imperviousness. The peak storm water runoff release rates leaving the site during post-construction conditions shall be equal to or less than the pre-development peak storm water runoff release rates for the 2-year frequency, 24-hour duration storm event and 10-year frequency, 24-hour duration storm event. The emergency overflow and outlet works for any pond or wetland constructed as a storm water BMP shall be capable of safely passing a discharge with a minimum recurrence frequency of 50 years. For detention basins, the temporary storage capacity shall be restored within 72 hours. Requirements of the Dam Safety Act shall be met when applicable. ¾ No one BMP shall receive runoff from an area greater than five (5) acres. However, the total drainage area from BMP’s used in series (i.e., integrated) can exceed this five (5) acre maximum. In 2004, Mecklenburg County began work to develop ordinances to control and manage storm water runoff and water quality impacts resulting from post- construction storm water discharges in other areas of Mecklenburg County. This work has four objectives: 1. Compliance with Phase I and Phase II NPDES Storm Water Permit requirements; 2. Address storm water pollution criteria specified by the NC Wildlife Resources Commission and the US Fish and Wildlife Serve for the Rocky River / Yadkin River basin; 3. Address the causes of impairment indentified in the NC 2002 Integrated 305(b) and 303(d) Report for Surface Waters in Mecklenburg County;and, 4. Address detention measures for the control of storm water volumes and peaks associated with new construction. The development of the ordinance provisions is involving approximately 18 stakeholders representing interests such as realtors, Chamber of Commerce, local government jurisidictions, home builders, environmental groups, and marine commissions. Staff and other technical support is provided to the stakeholders by Mecklenburg County, City of Charlotte, NC Wildlife Resources Commission, US Fish and Wildlife Service, NC DENR, and SC DHEC. Mecklenburg County has contracted with leading consultants to develop water quality models and provide additional technical support to the process. The detailed modeling is being used to evaluate the effectiveness of various methodologies and techniques in meeting water quality and hydrology goals. The stakeholder phase of this work is expected to be completed in 2005. The next step is for the results of this phase to be incorporated into draft ordinances and presented to the political jurisdictions within Mecklenburg County for adoption. Condition 3 of the IBT certificate imposes a moratorium on the installation of new IBT water lines (water lines crossing the ridgeline) into Goose Creek subbasin until the impacts of additional growth on the endangered species are fully evaluated. This moratorium remains in place. Condition 4 of the IBT certificate provides that the Environmental Management Commission may reopen the certificate under certain circumstances. This did not occur in 2004. Condition 5 of the IBT certificate requires Utilities to develop a compliance and monitoring plan for reporting maximum daily transfer amounts, compliance with certificate conditions, progress on mitigation measures, and drought management activities. At the direction of NCDWR staff, Utilities developed a reporting format and spreadsheets that were submitted in draft form for calendar year 2003. Not having been informed otherwise, Utilities assumes this format is satisfactory. Weather conditions in 2004 did not require implementation of drought management activities. However, Utilities is working with Duke Power, NCDWR, and other water users in the Catawba River basin to develop drought management plans to be included in the Federal Energy Regulatory Commission (FERC) relicensing of Duke Power’s hydroelectric facilities in 2008. This plan, referred to as the “Low Inflow Protocol” (LIP) will establish trigger mechanisms for multiple drought stages and prescribe actions that water users are to take at each stage. It is expected that development of the LIP will be completed in 2005 or early 2006 with implementation to follow. In summary, Utilities is in full compliance with IBT authorizations and compliance conditions. Utilities continues to work cooperatively with Mecklenburg County and other jurisdictions in our service area to develop and implement programs to support growth and mitigate direct and secondary impacts. Table 1 Consumptive Use (mgd) Portion of Water Use Discharged as Wastewater (mgd) 33.00 DATE Finished Water Pumping from Catawba (mgd) Catawba Basin (mgd) Rocky River Basin (mgd) Catawba River Basin (mgd) Rocky River Basin (mgd) Total Return to Catawba Basin (mgd) Interbasin Transfer (mgd) % of Withdrawal Returned IBT as % of Certificate 1/1/2004 78.39 14.83 2.41 52.65 8.49 67.49 10.90 86% 33% 1/2/2004 90.37 17.10 2.78 62.86 7.63 79.96 10.41 88% 32% 1/3/2004 85.69 16.21 2.64 59.56 7.27 75.77 9.91 88% 30% 1/4/2004 88.63 16.77 2.73 61.90 7.23 78.67 9.96 89% 30% 1/5/2004 86.11 16.29 2.65 60.13 7.04 76.42 9.70 89% 29% 1/6/2004 84.82 16.05 2.61 59.27 6.89 75.32 9.50 89% 29% 1/7/2004 87.92 16.63 2.71 60.91 7.67 77.55 10.37 88% 31% 1/8/2004 83.38 15.78 2.57 56.97 8.06 72.75 10.63 87% 32% 1/9/2004 77.28 14.62 2.38 53.02 7.26 67.64 9.64 88% 29% 1/10/2004 83.61 15.82 2.58 57.08 8.13 72.90 10.71 87% 32% 1/11/2004 84.43 15.97 2.60 57.92 7.94 73.89 10.54 88% 32% 1/12/2004 88.52 16.75 2.73 61.28 7.76 78.03 10.49 88% 32% 1/13/2004 86.65 16.39 2.67 59.79 7.80 76.18 10.47 88% 32% 1/14/2004 91.20 17.26 2.81 62.71 8.43 79.97 11.24 88% 34% 1/15/2004 88.06 16.66 2.71 60.53 8.16 77.19 10.87 88% 33% 1/16/2004 85.65 16.20 2.64 58.40 8.41 74.60 11.05 87% 33% 1/17/2004 83.42 15.78 2.57 55.91 9.15 71.69 11.72 86% 36% 1/18/2004 78.58 14.87 2.42 53.17 8.12 68.04 10.54 87% 32% 1/19/2004 89.42 16.92 2.75 61.54 8.20 78.46 10.96 88% 33% 1/20/2004 85.24 16.13 2.63 57.80 8.68 73.93 11.31 87% 34% 1/21/2004 85.49 16.17 2.63 57.95 8.73 74.13 11.37 87% 34% 1/22/2004 90.74 17.17 2.79 61.53 9.25 78.69 12.04 87% 36% 1/23/2004 85.49 16.18 2.63 59.55 7.14 75.72 9.77 89% 30% 1/24/2004 85.53 16.18 2.63 59.00 7.71 75.19 10.35 88% 31% 1/25/2004 79.92 15.12 2.46 55.73 6.60 70.85 9.06 89% 27% 1/26/2004 78.23 14.80 2.41 53.15 7.87 67.95 10.28 87% 31% 1/27/2004 86.55 16.37 2.67 59.34 8.16 75.72 10.83 87% 33% 1/28/2004 92.59 17.52 2.85 63.25 8.97 80.77 11.82 87% 36% 1/29/2004 90.54 17.13 2.79 61.40 9.22 78.53 12.01 87% 36% 1/30/2004 92.28 17.46 2.84 63.42 8.56 80.88 11.40 88% 35% 1/31/2004 91.66 47.93 7.80 27.10 8.83 75.03 16.63 82% 50% 2/1/2004 90.51 17.12 2.79 62.11 8.48 79.24 11.27 88% 34% 2/2/2004 87.48 16.55 2.69 59.86 8.38 76.41 11.07 87% 34% 2/3/2004 90.06 17.04 2.77 61.95 8.29 78.99 11.07 88% 34% 2/4/2004 93.96 17.78 2.89 64.22 9.07 81.99 11.97 87% 36% 2/5/2004 86.84 16.43 2.67 58.67 9.07 75.10 11.74 86% 36% 2/6/2004 83.55 15.81 2.57 57.76 7.41 73.56 9.98 88% 30% 2/7/2004 87.12 16.48 2.68 60.79 7.16 77.28 9.84 89% 30% 2/8/2004 83.20 15.74 2.56 58.27 6.62 74.01 9.18 89% 28% 2/9/2004 85.76 16.23 2.64 59.61 7.28 75.84 9.92 88% 30% 2/10/2004 89.28 16.89 2.75 61.53 8.11 78.43 10.86 88% 33% 2/11/2004 89.46 16.93 2.76 60.53 9.25 77.46 12.00 87% 36% 2/12/2004 84.29 15.95 2.60 57.06 8.69 73.01 11.28 87% 34% 2/13/2004 87.53 16.56 2.70 58.85 9.42 75.41 12.12 86% 37% 2/14/2004 78.90 14.93 2.43 52.82 8.72 67.75 11.15 86% 34% 2/15/2004 80.28 15.19 2.47 53.69 8.92 68.88 11.40 86% 35% 2/16/2004 88.51 16.75 2.73 59.63 9.40 76.38 12.13 86% 37% 2/17/2004 86.26 16.32 2.66 57.78 9.50 74.10 12.15 86% 37% 2/18/2004 89.95 17.02 2.77 59.15 11.02 76.17 13.79 85% 42% 2/19/2004 89.20 16.88 2.75 59.13 10.45 76.00 13.20 85% 40% 2/20/2004 87.61 16.58 2.70 59.13 9.21 75.71 11.91 86% 36% 2/21/2004 83.44 15.79 2.57 56.47 8.61 72.26 11.18 87% 34% 2/22/2004 84.74 16.03 2.61 56.27 9.82 72.30 12.43 85% 38% 2/23/2004 87.01 16.46 2.68 58.36 9.51 74.82 12.19 86% 37% 2/24/2004 87.97 16.64 2.71 59.15 9.47 75.80 12.18 86% 37% 2/25/2004 88.06 16.66 2.71 59.55 9.13 76.21 11.84 87% 36% 2/26/2004 77.08 14.58 2.37 51.57 8.55 66.16 10.92 86% 33% 2/27/2004 78.49 14.85 2.42 53.15 8.08 68.00 10.50 87% 32% 2/28/2004 80.02 15.14 2.46 55.30 7.12 70.44 9.58 88% 29% 2/29/2004 85.34 16.15 2.63 58.12 8.44 74.27 11.07 87% 34% 3/1/2004 86.17 16.30 2.65 58.38 8.83 74.69 11.48 87% 35% 3/2/2004 91.62 17.33 2.82 63.04 8.42 80.38 11.24 88% 34% 3/3/2004 92.75 17.55 2.86 64.00 8.35 81.54 11.21 88% 34% 3/4/2004 90.45 17.11 2.79 62.07 8.48 79.19 11.27 88% 34% 3/5/2004 90.35 17.09 2.78 61.47 9.01 78.56 11.79 87% 36% 3/6/2004 88.58 16.76 2.73 61.41 7.68 78.17 10.41 88% 32% 3/7/2004 91.07 17.23 2.80 63.10 7.93 80.33 10.74 88% 33% 3/8/2004 87.29 16.52 2.69 60.29 7.80 76.80 10.49 88% 32% 3/9/2004 88.02 16.65 2.71 59.90 8.76 76.55 11.47 87% 35% 3/10/2004 93.33 17.66 2.87 63.50 9.30 81.16 12.17 87% 37% 3/11/2004 90.54 17.13 2.79 61.05 9.57 78.18 12.36 86% 37% 3/12/2004 93.41 17.67 2.88 63.80 9.06 81.48 11.94 87% 36% 3/13/2004 91.26 17.27 2.81 62.31 8.87 79.58 11.68 87% 35% 3/14/2004 86.82 16.43 2.67 58.92 8.80 75.34 11.48 87% 35% 3/15/2004 89.36 16.91 2.75 61.20 8.50 78.11 11.25 87% 34% 3/16/2004 93.91 17.77 2.89 63.23 10.02 81.00 12.91 86% 39% 3/17/2004 89.08 16.85 2.74 59.98 9.50 76.83 12.25 86% 37% 3/18/2004 85.72 16.22 2.64 57.02 9.85 73.24 12.49 85% 38% 3/19/2004 92.84 17.57 2.86 62.65 9.77 80.21 12.63 86% 38% 3/20/2004 89.53 16.94 2.76 60.50 9.33 77.44 12.09 86% 37% 3/21/2004 85.96 16.26 2.65 58.87 8.17 75.13 10.82 87% 33% 3/22/2004 93.94 17.77 2.89 63.47 9.80 81.25 12.69 86% 38% 3/23/2004 93.12 17.62 2.87 62.75 9.89 80.36 12.76 86% 39% 3/24/2004 99.00 18.73 3.05 66.56 10.66 85.29 13.71 86% 42% 3/25/2004 97.11 18.37 2.99 65.47 10.28 83.84 13.27 86% 40% 3/26/2004 102.98 19.48 3.17 69.87 10.45 89.36 13.62 87% 41% 3/27/2004 98.69 18.67 3.04 66.74 10.23 85.41 13.27 87% 40% 3/28/2004 102.92 19.47 3.17 70.02 10.26 89.49 13.43 87% 41% 3/29/2004 105.61 19.98 3.25 71.60 10.77 91.58 14.03 87% 43% 3/30/2004 88.57 16.76 2.73 60.21 8.87 76.97 11.60 87% 35% 3/31/2004 88.96 16.83 2.74 59.37 10.02 76.20 12.76 86% 39% 4/1/2004 94.54 17.89 2.91 63.71 10.03 81.59 12.95 86% 39% 4/2/2004 94.95 17.96 2.92 63.68 10.37 81.65 13.30 86% 40% 4/3/2004 91.86 17.38 2.83 61.50 10.15 78.88 12.98 86% 39% 4/4/2004 92.75 17.55 2.86 62.13 10.22 79.68 13.07 86% 40% 4/5/2004 96.48 18.25 2.97 65.26 9.99 83.52 12.96 87% 39% 4/6/2004 101.16 19.14 3.12 68.06 10.85 87.20 13.96 86% 42% 4/7/2004 104.33 19.74 3.21 69.89 11.49 89.63 14.70 86% 45% 4/8/2004 104.84 20.92 3.41 69.12 11.39 90.04 14.79 86% 45% 4/9/2004 109.44 22.93 3.73 71.67 11.11 94.60 14.84 86% 45% 4/10/2004 95.63 18.09 2.95 64.72 9.87 82.82 12.81 87% 39% 4/11/2004 89.99 17.03 2.77 61.34 8.85 78.36 11.62 87% 35% 4/12/2004 89.41 16.92 2.75 59.98 9.76 76.90 12.52 86% 38% 4/13/2004 90.23 17.07 2.78 61.10 9.28 78.17 12.06 87% 37% 4/14/2004 92.73 17.54 2.86 62.10 10.23 79.64 13.08 86% 40% 4/15/2004 93.29 17.65 2.87 62.57 10.19 80.22 13.06 86% 40% 4/16/2004 105.51 21.71 3.53 68.58 11.68 90.29 15.22 86% 46% 4/17/2004 111.14 24.25 3.95 70.87 12.07 95.12 16.02 86% 49% 4/18/2004 109.22 24.50 3.99 69.76 10.97 94.26 14.96 86% 45% 4/19/2004 125.89 35.39 5.76 72.93 11.82 108.31 17.58 86% 53% 4/20/2004 118.30 31.44 5.12 69.73 12.02 101.16 17.13 86% 52% 4/21/2004 123.86 36.50 5.94 73.04 8.38 109.54 14.32 88% 43% 4/22/2004 124.50 36.05 5.87 70.64 11.94 106.69 17.80 86% 54% 4/23/2004 129.31 41.31 6.72 69.32 11.96 110.63 18.68 86% 57% 4/24/2004 125.41 36.38 5.92 71.38 11.73 107.76 17.65 86% 53% 4/25/2004 122.98 35.96 5.85 69.89 11.28 105.84 17.13 86% 52% 4/26/2004 110.46 24.57 4.00 70.41 11.48 94.98 15.48 86% 47% 4/27/2004 106.55 20.67 3.36 70.97 11.55 91.63 14.91 86% 45% 4/28/2004 118.03 32.09 5.22 68.20 12.52 100.29 17.74 85% 54% 4/29/2004 120.39 33.87 5.51 68.29 12.71 102.16 18.23 85% 55% 4/30/2004 122.08 28.84 4.69 75.84 12.71 104.68 17.40 86% 53% 5/1/2004 100.98 19.10 3.11 66.54 12.22 85.64 15.33 85% 46% 5/2/2004 97.03 18.36 2.99 64.67 11.01 83.03 14.00 86% 42% 5/3/2004 101.83 19.27 3.14 68.34 11.09 87.60 14.22 86% 43% 5/4/2004 105.22 19.91 3.24 70.59 11.48 90.50 14.72 86% 45% 5/5/2004 113.54 27.49 4.48 70.01 11.56 97.51 16.03 86% 49% 5/6/2004 119.77 31.85 5.18 71.24 11.50 103.09 16.68 86% 51% 5/7/2004 134.23 47.54 7.74 67.61 11.34 115.15 19.08 86% 58% 5/8/2004 128.75 40.23 6.55 70.60 11.37 110.83 17.92 86% 54% 5/9/2004 125.67 38.21 6.22 70.02 11.22 108.23 17.44 86% 53% 5/10/2004 131.11 41.39 6.74 71.56 11.42 112.95 18.16 86% 55% 5/11/2004 133.24 45.57 7.42 68.81 11.45 114.38 18.86 86% 57% 5/12/2004 128.03 39.83 6.48 69.85 11.86 109.68 18.35 86% 56% 5/13/2004 122.58 38.32 6.24 66.34 11.68 104.66 17.91 85% 54% 5/14/2004 128.19 40.96 6.67 70.67 9.89 111.63 16.56 87% 50% 5/15/2004 133.03 44.82 7.30 70.81 10.10 115.63 17.40 87% 53% 5/16/2004 134.20 46.20 7.52 70.51 9.97 116.71 17.49 87% 53% 5/17/2004 138.31 49.73 8.10 70.87 9.61 120.60 17.71 87% 54% 5/18/2004 129.07 41.32 6.73 71.59 9.43 112.91 16.16 87% 49% 5/19/2004 135.73 48.78 7.94 69.41 9.60 118.19 17.54 87% 53% 5/20/2004 139.53 50.16 8.17 71.46 9.75 121.62 17.91 87% 54% 5/21/2004 148.39 58.92 9.59 70.16 9.72 129.08 19.31 87% 59% 5/22/2004 147.96 57.40 9.34 71.55 9.66 128.95 19.01 87% 58% 5/23/2004 144.24 54.45 8.86 71.12 9.81 125.57 18.67 87% 57% 5/24/2004 150.01 58.86 9.58 71.70 9.87 130.56 19.46 87% 59% 5/25/2004 149.35 55.79 9.08 74.78 9.70 130.57 18.78 87% 57% 5/26/2004 152.69 63.12 10.27 69.58 9.72 132.70 20.00 87% 61% 5/27/2004 149.71 62.68 10.20 68.72 8.10 131.41 18.30 88% 55% 5/28/2004 145.90 57.38 9.34 69.92 9.25 127.31 18.59 87% 56% 5/29/2004 151.83 66.19 10.78 66.91 7.95 133.10 18.73 88% 57% 5/30/2004 133.21 48.46 7.89 68.94 7.92 117.40 15.81 88% 48% 5/31/2004 129.53 41.86 6.81 72.40 8.46 114.26 15.27 88% 46% 6/1/2004 133.59 47.95 7.81 69.21 8.63 117.15 16.43 88% 50% 6/2/2004 150.79 64.63 10.52 67.04 8.59 131.67 19.11 87% 58% 6/3/2004 151.13 64.79 10.55 67.37 8.43 132.16 18.98 87% 58% 6/4/2004 129.36 43.80 7.13 69.87 8.55 113.67 15.68 88% 48% 6/5/2004 139.63 53.42 8.70 69.06 8.46 122.48 17.15 88% 52% 6/6/2004 140.53 55.85 9.09 67.14 8.45 122.99 17.54 88% 53% 6/7/2004 139.35 52.40 8.53 69.74 8.68 122.14 17.21 88% 52% 6/8/2004 133.07 45.58 7.42 71.38 8.69 116.96 16.11 88% 49% 6/9/2004 123.30 33.51 5.46 75.50 8.84 109.01 14.29 88% 43% 6/10/2004 124.43 39.12 6.37 70.07 8.87 109.19 15.24 88% 46% 6/11/2004 139.70 49.69 8.09 73.21 8.71 122.90 16.80 88% 51% 6/12/2004 137.28 50.94 8.29 69.50 8.55 120.43 16.84 88% 51% 6/13/2004 116.37 36.03 5.87 65.88 8.59 101.91 14.45 88% 44% 6/14/2004 115.64 25.20 4.10 76.76 9.59 101.95 13.69 88% 41% 6/15/2004 110.43 21.07 3.43 74.98 10.95 96.05 14.38 87% 44% 6/16/2004 117.17 33.71 5.49 68.24 9.74 101.95 15.22 87% 46% 6/17/2004 113.48 31.10 5.06 66.92 10.40 98.02 15.46 86% 47% 6/18/2004 128.53 38.95 6.34 73.89 9.34 112.84 15.68 88% 48% 6/19/2004 124.08 34.48 5.61 75.18 8.81 109.66 14.42 88% 44% 6/20/2004 124.56 38.05 6.19 71.60 8.72 109.64 14.92 88% 45% 6/21/2004 120.59 27.06 4.40 78.69 10.44 105.75 14.84 88% 45% 6/22/2004 111.67 22.87 3.72 75.33 9.75 98.19 13.47 88% 41% 6/23/2004 110.41 20.89 3.40 76.54 9.57 97.43 12.98 88% 39% 6/24/2004 104.41 19.76 3.22 73.03 8.41 92.79 11.63 89% 35% 6/25/2004 102.81 19.45 3.17 71.50 8.70 90.95 11.86 88% 36% 6/26/2004 98.99 18.73 3.05 68.29 8.92 87.02 11.97 88% 36% 6/27/2004 100.32 18.98 3.09 70.00 8.25 88.98 11.34 89% 34% 6/28/2004 109.15 20.94 3.41 75.40 9.40 96.34 12.81 88% 39% 6/29/2004 108.34 22.29 3.63 73.09 9.33 95.38 12.96 88% 39% 6/30/2004 110.19 24.33 3.96 72.66 9.23 96.99 13.20 88% 40% 7/1/2004 105.96 20.62 3.36 72.17 9.82 92.79 13.17 88% 40% 7/2/2004 112.00 26.29 4.28 71.82 9.62 98.10 13.90 88% 42% 7/3/2004 102.01 19.30 3.14 71.25 8.32 90.55 11.46 89% 35% 7/4/2004 102.07 22.44 3.65 67.70 8.27 90.15 11.92 88% 36% 7/5/2004 109.19 30.21 4.92 66.17 7.89 96.38 12.81 88% 39% 7/6/2004 111.43 26.32 4.28 72.16 8.67 98.47 12.96 88% 39% 7/7/2004 122.81 38.09 6.20 69.68 8.84 107.77 15.04 88% 46% 7/8/2004 128.44 43.11 7.02 69.66 8.65 112.77 15.67 88% 47% 7/9/2004 134.11 44.29 7.21 73.97 8.64 118.26 15.85 88% 48% 7/10/2004 135.68 48.92 7.96 70.21 8.59 119.13 16.55 88% 50% 7/11/2004 117.22 33.56 5.46 69.47 8.72 103.03 14.19 88% 43% 7/12/2004 121.41 35.02 5.70 71.51 9.18 106.53 14.88 88% 45% 7/13/2004 120.40 38.58 6.28 66.94 8.61 105.52 14.89 88% 45% 7/14/2004 135.48 51.82 8.44 66.39 8.83 118.21 17.27 87% 52% 7/15/2004 131.89 50.38 8.20 64.52 8.79 114.89 16.99 87% 51% 7/16/2004 136.87 50.61 8.24 69.29 8.74 119.90 16.97 88% 51% 7/17/2004 125.95 38.18 6.22 72.96 8.59 111.14 14.80 88% 45% 7/18/2004 108.69 20.56 3.35 76.16 8.62 96.72 11.97 89% 36% 7/19/2004 121.45 35.64 5.80 70.76 9.25 106.39 15.05 88% 46% 7/20/2004 125.17 39.71 6.46 69.98 9.01 109.70 15.48 88% 47% 7/21/2004 134.43 48.74 7.93 68.86 8.89 117.60 16.82 87% 51% 7/22/2004 130.96 43.45 7.07 71.42 9.01 114.88 16.08 88% 49% 7/23/2004 132.48 43.53 7.09 72.94 8.92 116.47 16.00 88% 48% 7/24/2004 129.36 45.71 7.44 67.46 8.74 113.17 16.18 87% 49% 7/25/2004 131.52 49.24 8.02 65.41 8.85 114.65 16.87 87% 51% 7/26/2004 128.00 42.72 6.95 69.15 9.18 111.87 16.13 87% 49% 7/27/2004 110.04 20.82 3.39 76.36 9.48 97.17 12.86 88% 39% 7/28/2004 115.97 23.95 3.90 78.60 9.52 102.55 13.42 88% 41% 7/29/2004 105.29 19.92 3.24 73.44 8.68 93.36 11.93 89% 36% 7/30/2004 109.32 20.68 3.37 75.63 9.65 96.31 13.01 88% 39% 7/31/2004 109.68 23.19 3.77 73.41 9.31 96.59 13.08 88% 40% 8/1/2004 109.40 26.50 4.31 69.46 9.13 95.96 13.45 88% 41% 8/2/2004 115.17 29.55 4.81 71.16 9.65 100.71 14.46 87% 44% 8/3/2004 120.86 35.57 5.79 70.11 9.39 105.68 15.18 87% 46% 8/4/2004 129.09 43.16 7.03 69.75 9.15 112.91 16.18 87% 49% 8/5/2004 125.72 39.49 6.43 71.10 8.70 110.59 15.13 88% 46% 8/6/2004 121.80 40.12 6.53 66.15 8.99 106.28 15.53 87% 47% 8/7/2004 121.11 42.13 6.86 63.34 8.79 105.47 15.65 87% 47% 8/8/2004 125.35 47.34 7.71 61.47 8.83 108.81 16.54 87% 50% 8/9/2004 133.11 49.95 8.13 65.85 9.18 115.80 17.31 87% 52% 8/10/2004 126.18 43.93 7.15 65.92 9.18 109.85 16.33 87% 49% 8/11/2004 132.85 48.57 7.91 67.27 9.11 115.84 17.01 87% 52% 8/12/2004 112.46 21.28 3.46 78.01 9.71 99.29 13.17 88% 40% 8/13/2004 106.78 20.20 3.29 72.97 10.32 93.17 13.61 87% 41% 8/14/2004 98.77 18.69 3.04 68.32 8.72 87.01 11.76 88% 36% 8/15/2004 100.65 19.04 3.10 69.03 9.47 88.07 12.57 88% 38% 8/16/2004 111.86 25.95 4.22 71.43 10.25 97.38 14.48 87% 44% 8/17/2004 109.88 24.29 3.95 71.64 10.00 95.93 13.95 87% 42% 8/18/2004 114.64 34.83 5.67 64.54 9.60 99.38 15.27 87% 46% 8/19/2004 118.00 34.53 5.62 67.03 10.81 101.56 16.44 86% 50% 8/20/2004 128.54 38.80 6.32 73.54 9.89 112.34 16.20 87% 49% 8/21/2004 110.61 20.93 3.41 76.52 9.76 97.45 13.17 88% 40% 8/22/2004 110.37 23.41 3.81 73.28 9.87 96.69 13.68 88% 41% 8/23/2004 114.76 31.01 5.05 68.80 9.90 99.81 14.95 87% 45% 8/24/2004 114.57 30.30 4.93 69.52 9.82 99.82 14.75 87% 45% 8/25/2004 122.80 39.38 6.41 67.27 9.75 106.64 16.16 87% 49% 8/26/2004 122.76 40.66 6.62 65.62 9.86 106.28 16.48 87% 50% 8/27/2004 123.02 41.22 6.71 65.61 9.48 106.83 16.19 87% 49% 8/28/2004 126.27 42.74 6.96 67.50 9.07 110.24 16.03 87% 49% 8/29/2004 113.63 29.16 4.75 70.18 9.54 99.34 14.29 87% 43% 8/30/2004 110.48 22.11 3.60 75.00 9.76 97.11 13.36 88% 40% 8/31/2004 107.04 20.25 3.30 74.31 9.18 94.57 12.48 88% 38% 9/1/2004 109.63 24.62 4.01 71.65 9.36 96.27 13.37 88% 41% 9/2/2004 105.80 23.38 3.81 69.34 9.28 92.72 13.08 88% 40% 9/3/2004 113.19 29.90 4.87 69.18 9.24 99.08 14.11 88% 43% 9/4/2004 105.42 27.11 4.41 65.16 8.74 92.26 13.15 88% 40% 9/5/2004 105.54 26.59 4.33 65.53 9.09 92.12 13.42 87% 41% 9/6/2004 107.80 25.85 4.21 68.34 9.40 94.19 13.61 87% 41% 9/7/2004 101.76 19.25 3.13 71.07 8.30 90.33 11.43 89% 35% 9/8/2004 101.02 19.11 3.11 69.96 8.84 89.07 11.95 88% 36% 9/9/2004 101.49 19.20 3.13 70.95 8.21 90.15 11.34 89% 34% 9/10/2004 101.83 19.27 3.14 70.63 8.80 89.89 11.94 88% 36% 9/11/2004 101.12 19.13 3.11 71.03 7.85 90.16 10.96 89% 33% 9/12/2004 108.71 20.57 3.35 75.69 9.10 96.26 12.45 89% 38% 9/13/2004 110.78 20.96 3.41 75.43 10.97 96.39 14.38 87% 44% 9/14/2004 102.30 19.36 3.15 69.19 10.61 88.54 13.76 87% 42% 9/15/2004 106.84 22.45 3.65 69.80 10.94 92.25 14.59 86% 44% 9/16/2004 101.04 19.12 3.11 67.91 10.90 87.02 14.01 86% 42% 9/17/2004 96.53 18.26 2.97 66.97 8.32 85.24 11.29 88% 34% 9/18/2004 97.08 18.37 2.99 67.65 8.07 86.02 11.06 89% 34% 9/19/2004 103.91 19.66 3.20 71.88 9.17 91.54 12.37 88% 37% 9/20/2004 106.98 21.39 3.48 72.60 9.49 94.00 12.98 88% 39% 9/21/2004 108.17 21.90 3.57 73.31 9.39 95.21 12.96 88% 39% 9/22/2004 115.66 28.48 4.64 73.09 9.45 101.57 14.09 88% 43% 9/23/2004 115.40 28.88 4.70 72.42 9.39 101.30 14.10 88% 43% 9/24/2004 117.12 27.78 4.52 75.56 9.26 103.34 13.78 88% 42% 9/25/2004 114.56 29.61 4.82 71.00 9.12 100.61 13.94 88% 42% 9/26/2004 118.31 31.67 5.16 72.19 9.29 103.86 14.45 88% 44% 9/27/2004 107.04 20.25 3.30 74.61 8.88 94.86 12.18 89% 37% 9/28/2004 98.73 18.68 3.04 67.64 9.37 86.32 12.41 87% 38% 9/29/2004 103.49 19.58 3.19 71.06 9.66 90.64 12.84 88% 39% 9/30/2004 106.61 20.17 3.28 74.22 8.94 94.39 12.22 89% 37% 10/1/2004 104.87 19.84 3.23 73.37 8.44 93.21 11.67 89% 35% 10/2/2004 102.37 19.37 3.15 71.52 8.32 90.89 11.48 89% 35% 10/3/2004 106.62 20.17 3.28 73.24 9.92 93.42 13.20 88% 40% 10/4/2004 109.07 20.64 3.36 75.10 9.98 95.73 13.34 88% 40% 10/5/2004 111.43 22.23 3.62 75.44 10.14 97.67 13.76 88% 42% 10/6/2004 108.52 20.53 3.34 73.50 11.14 94.03 14.49 87% 44% 10/7/2004 110.42 21.46 3.49 74.57 10.90 96.03 14.39 87% 44% 10/8/2004 114.36 25.54 4.16 73.33 11.33 98.87 15.49 86% 47% 10/9/2004 111.91 26.27 4.28 71.53 9.84 97.79 14.11 87% 43% 10/10/2004 111.11 23.44 3.82 74.73 9.13 98.17 12.94 88% 39% 10/11/2004 120.43 32.08 5.22 74.09 9.04 106.17 14.26 88% 43% 10/12/2004 109.58 20.85 3.39 76.13 9.20 96.99 12.59 89% 38% 10/13/2004 104.88 19.84 3.23 73.81 7.99 93.66 11.22 89% 34% 10/14/2004 103.92 19.66 3.20 72.60 8.46 92.26 11.66 89% 35% 10/15/2004 105.12 19.89 3.24 72.97 9.03 92.85 12.27 88% 37% 10/16/2004 104.10 19.70 3.21 72.48 8.71 92.18 11.92 89% 36% 10/17/2004 104.02 19.70 3.21 72.49 8.62 92.19 11.83 89% 36% 10/18/2004 114.29 26.76 4.36 74.11 9.06 100.87 13.42 88% 41% 10/19/2004 106.14 20.08 3.27 73.55 9.24 93.63 12.51 88% 38% 10/20/2004 107.73 22.25 3.62 72.58 9.27 94.83 12.90 88% 39% 10/21/2004 105.64 21.07 3.43 71.84 9.30 92.91 12.73 88% 39% 10/22/2004 105.47 19.96 3.25 73.07 9.20 93.03 12.45 88% 38% 10/23/2004 103.23 19.53 3.18 71.75 8.76 91.28 11.94 88% 36% 10/24/2004 101.65 19.23 3.13 70.10 9.19 89.33 12.32 88% 37% 10/25/2004 106.66 20.18 3.29 73.78 9.42 93.96 12.70 88% 38% 10/26/2004 100.71 19.05 3.10 69.58 8.97 88.64 12.07 88% 37% 10/27/2004 100.52 19.02 3.10 69.63 8.78 88.64 11.88 88% 36% 10/28/2004 97.73 18.49 3.01 67.24 8.99 85.73 12.00 88% 36% 10/29/2004 100.50 19.01 3.10 69.51 8.88 88.53 11.97 88% 36% 10/30/2004 100.09 18.94 3.08 69.41 8.65 88.35 11.74 88% 36% 10/31/2004 106.04 20.06 3.27 73.17 9.55 93.23 12.81 88% 39% 11/1/2004 104.82 19.83 3.23 72.46 9.30 92.29 12.53 88% 38% 11/2/2004 97.96 18.53 3.02 67.69 8.72 86.22 11.74 88% 36% 11/3/2004 102.56 19.40 3.16 70.87 9.12 90.28 12.28 88% 37% 11/4/2004 92.50 17.50 2.85 64.10 8.05 81.60 10.90 88% 33% 11/5/2004 97.24 18.40 3.00 67.55 8.30 85.95 11.29 88% 34% 11/6/2004 90.31 17.09 2.78 62.40 8.04 79.48 10.83 88% 33% 11/7/2004 99.34 18.80 3.06 68.65 8.84 87.45 11.90 88% 36% 11/8/2004 100.66 19.04 3.10 69.67 8.84 88.72 11.94 88% 36% 11/9/2004 97.01 18.35 2.99 67.11 8.56 85.47 11.55 88% 35% 11/10/2004 94.84 17.94 2.92 65.63 8.35 83.57 11.27 88% 34% 11/11/2004 99.39 18.80 3.06 68.99 8.53 87.79 11.59 88% 35% 11/12/2004 89.35 16.90 2.75 62.35 7.35 79.25 10.10 89% 31% 11/13/2004 87.56 16.57 2.70 60.75 7.55 77.31 10.25 88% 31% 11/14/2004 90.45 17.11 2.79 62.74 7.81 79.85 10.60 88% 32% 11/15/2004 91.39 17.29 2.81 63.40 7.88 80.70 10.69 88% 32% 11/16/2004 93.18 17.63 2.87 64.40 8.28 82.03 11.15 88% 34% 11/17/2004 93.07 17.61 2.87 64.67 7.92 82.28 10.79 88% 33% 11/18/2004 93.63 17.71 2.88 64.93 8.10 82.64 10.99 88% 33% 11/19/2004 92.83 17.56 2.86 64.48 7.93 82.05 10.79 88% 33% 11/20/2004 88.29 16.70 2.72 61.13 7.74 77.83 10.45 88% 32% 11/21/2004 91.30 17.27 2.81 63.15 8.07 80.42 10.88 88% 33% 11/22/2004 92.01 17.41 2.83 64.01 7.76 81.41 10.60 88% 32% 11/23/2004 87.74 16.60 2.70 61.19 7.24 77.79 9.94 89% 30% 11/24/2004 90.97 17.21 2.80 63.37 7.59 80.58 10.39 89% 31% 11/25/2004 81.62 15.44 2.51 56.75 6.91 72.19 9.43 88% 29% 11/26/2004 78.93 14.93 2.43 54.61 6.96 69.54 9.39 88% 28% 11/27/2004 84.40 15.97 2.60 58.58 7.25 74.55 9.85 88% 30% 11/28/2004 87.83 16.62 2.71 61.49 7.01 78.11 9.71 89% 29% 11/29/2004 87.49 16.55 2.69 60.90 7.34 77.45 10.03 89% 30% 11/30/2004 88.95 16.83 2.74 61.93 7.45 78.76 10.19 89% 31% 12/1/2004 88.89 16.82 2.74 61.58 7.75 78.40 10.49 88% 32% 12/2/2004 89.19 16.88 2.75 61.68 7.89 78.56 10.63 88% 32% 12/3/2004 87.42 16.54 2.69 60.43 7.76 76.97 10.45 88% 32% 12/4/2004 87.81 16.61 2.70 60.67 7.82 77.29 10.52 88% 32% 12/5/2004 87.64 16.58 2.70 60.47 7.89 77.05 10.59 88% 32% 12/6/2004 88.76 16.79 2.73 61.87 7.36 78.66 10.10 89% 31% 12/7/2004 94.59 17.90 2.91 65.53 8.25 83.42 11.17 88% 34% 12/8/2004 98.76 18.69 3.04 67.93 9.10 86.61 12.14 88% 37% 12/9/2004 98.88 18.71 3.05 67.45 9.68 86.16 12.72 87% 39% 12/10/2004 91.68 17.35 2.82 64.71 6.80 82.06 9.62 90% 29% 12/11/2004 90.21 17.07 2.78 62.32 8.05 79.38 10.82 88% 33% 12/12/2004 93.82 17.75 2.89 64.99 8.18 82.74 11.07 88% 34% 12/13/2004 95.84 18.13 2.95 66.55 8.21 84.68 11.16 88% 34% 12/14/2004 96.61 18.28 2.98 67.32 8.04 85.59 11.02 89% 33% 12/15/2004 99.50 18.83 3.06 69.41 8.20 88.23 11.26 89% 34% 12/16/2004 92.89 17.57 2.86 64.55 7.90 82.12 10.76 88% 33% 12/17/2004 89.62 16.96 2.76 62.45 7.45 79.41 10.21 89% 31% 12/18/2004 83.89 15.87 2.58 58.33 7.11 74.20 9.69 88% 29% 12/19/2004 87.74 16.60 2.70 60.74 7.70 77.34 10.40 88% 32% 12/20/2004 88.47 16.74 2.72 61.47 7.54 78.21 10.27 88% 31% 12/21/2004 93.31 17.65 2.87 64.94 7.84 82.59 10.72 89% 32% 12/22/2004 88.14 16.68 2.71 61.41 7.34 78.08 10.06 89% 30% 12/23/2004 82.51 15.61 2.54 57.92 6.44 73.53 8.98 89% 27% 12/24/2004 87.01 16.46 2.68 60.32 7.55 76.78 10.23 88% 31% 12/25/2004 74.99 14.19 2.31 51.85 6.64 66.04 8.95 88% 27% 12/26/2004 84.36 15.96 2.60 58.48 7.32 74.44 9.92 88% 30% 12/27/2004 87.91 16.63 2.71 61.41 7.17 78.04 9.87 89% 30% 12/28/2004 89.68 16.97 2.76 62.08 7.87 79.05 10.63 88% 32% 12/29/2004 91.00 17.22 2.80 63.23 7.75 80.44 10.56 88% 32% 12/30/2004 90.77 17.17 2.80 63.59 7.21 80.76 10.00 89% 30% 12/31/2004 88.80 16.80 2.74 62.21 7.05 79.01 9.79 89% 30% Minimum 74.99 14.19 2.31 27.10 6.44 66.04 8.95 82% 27% Maximum 152.69 66.19 10.78 78.69 12.71 133.10 20.00 90% 61% Average 104.97 25.26 4.11 66.53 9.07 91.79 13.19 87% 40%