Read FINAL Reagan Parmer Corridor Study text version

Final Approved Version April 21, 2010 Page 2

Reagan Parmer Corridor Utility Phasing Plan

Water & Wastewater Service

April 21, 2010

Funded by the following participants: City of Leander Reagan Parmer Corridor Association Riverside Resources Scott & Marci Cannon Joseph & Shari Greene BJ Hogan J.L Love Jerry Thomas

Prepared by Bury+Partners, Inc. Dennis Ku, P.E. 221 West Sixth Street, Suite 600 Austin, Texas 78701

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 3

Revised July 22, 2009 Revised April 21, 2010

Mr. Pix Howell Urban Design Officer City of Leander P.O. Box 319 Leander, Texas 78649

Mr. Joseph Greene, III Chairman Reagan Parmer Corridor Association 1815 S. Hwy 183, Suite 206 Leander, Texas 78641

Re:

Reagan Parmer Corridor Study Summary Letter

Gentlemen, Bury+Partners, Inc. recently completed the water and wastewater study for the Reagan Parmer Corridor. K Friese and Associates (KFA) completed a water and wastewater master plan for the entire City of Leander in August 2008. The Reagan Parmer Corridor study focuses on the area adjacent to the Parmer Lane extension outlined in red in the attached Parcel Map. The study has been completed and a presentation was made to the Project Team highlighting the findings and recommendations for the project. Please accept the following as the Reagan Parmer Corridor Study Summary. Description of Study Area The area studied is primarily undeveloped with little or no water and wastewater service to the majority of the tracts. Multiple tracts have proposed future improvements ranging from single family developments to commercial developments. Ronald Reagan Boulevard and Parmer Lane bisect the study area from north to south. Population and Demand Projections For the analysis, the population projections and water demand projections in the KFA master plans were modified to account for the current economic conditions to determine the water demand of the study area through the year 2029. Demand information from a water model received from KFA was then used to apportion the revised demands to the proposed pipe network at 5-, 10- and 20-year time horizons. Wastewater loadings were determined using a similar approach. Each scenario was an adjustment and refinement of the KFA master plan in order to focus the development to this specific corridor.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 4

The KFA projections were broken into 5-year periods and then analyzed to establish an average annual growth rate, G, for each period. These growth rates were then adjusted taking into account factors affecting growth, including the current economic downturn. Three (3) scenarios were determined and presented: low, medium, and high growth. Per conversations with the City, the medium scenario was ultimately chosen. The table below summarizes the medium growth scenario.

Period 2009-2014 2014-2019 2019-2024 2024-2027 0.5 1.5 1 -

Initial Population Po 3,240 13,058 29,517 41,401

Medium Growth Scenario No. Years in Growth Projected Population Period Pf n 13,058 5 29,517 5 41,401 5 47,055 3

Average Annual Growth Rate G 32.15% 17.72% 7.00% 4.36%

% of Build Out Population 9.08% 20.53% 28.80% 32.73%

Adjustment Factor to G for 2009 to mid 2010 Reduction Period Reduction Period (years) Adjustment Factor to K Friese G for remainder Assume Economic Downturn impacts growth for 1.5 years, reduce G by 50% from 2009 thru mid 2010 Resume K Friese Growth Rates, G for remainder of Projection

The average annual growth factors were applied to the water and wastewater connection projections in the KFA master plans to project future water and wastewater Living Unit Equivalents (LUEs). Future water demand and the wastewater loadings were then projected using 2.8 people per LUEs. Phasing Plans The water and wastewater demand projections were used to determine the line sizes required to provide service through a given year. The phasing plan was divided into two (2) phases for both water and wastewater improvements to deliver service to the study area for a minimum of 10-years for Phase I and the equivalent ultimate capacity of the proposed line sizes found in the KFA Master Plans. Because the re-alignment of FM 2243 will be the only east-west thoroughfare to completely cross the city of Leander the study assumed that the area around the intersection of FM 2243 and Parmer would grow more densely. The phasing plans thus focused on providing service to the area near this intersection.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 5

Water Phasing Plan The study area is divided into two (2) regions with respect to existing Certificate of Convenience and Necessity (CCN) jurisdictions, with the region north of the San Gabriel River lying within the Chisholm Trail Special Utility District's (CTSUD) service area, and the region to the south lying within the City of Leander's CCN jurisdiction as delineated on the attached waterline phasing plan. A CCN bestows the right to provide water or wastewater service to the CCN holder for a given area. While other potential water providers have existing infrastructure within the study area, the study has assumed the City of Leander would exercise their right to provide water service to the study area within their jurisdiction. The study also assumed that CTSUD would also exercise their right to provide service to tracts north of the San Gabriel River that lie within their jurisdiction. Should the City of Leander or the Chisholm Trail Special Utility District (CTSUD) not be able to adequately provide water or wastewater service to a given area, the landowners may opt to petition the Texas Commission on Environmental Quality (TCEQ) to be removed from the CCN area and pursue obtaining service from another provider. However, this scenario is beyond the scope of this study. It is also possible that the City of Leander could file for dual certification within CTSUD's existing CCN area and provide service to the region north of the San Gabriel River. However, this scenario was also not studied.

Chisholm Trail Special Utility District CCN Phasing Plan Specific tracts north of the San Gabriel River have established multiple utility districts (MUD) in order to provide utility service to their residents of the tracts. The Highland Meadows Tract (Tract 2) and the Rancho Sienna Tract (Tract 6) have established MUDs for their tracts, Williamson Liberty Hill and Williamson County MUD #12, respectively. Tracts 2, 6, and 10 have also signed service agreements with the CTSUD; however they are not currently receiving water. Tract 9 has executed an agreement with the City of Georgetown for water services. Tract 11, Gabriel's Overlook Subdivision currently receives water service directly from CTSUD. Per conversations with John Hatchell (Interim General Manager of CTSUD), a 20-inch water line exist along SH 29. The water line through which CTSUD previously provided water to the City of Leander has been abandoned. CTSUD is currently upgrading water lines along US 183. CTSUD does not currently have any plans for waterline improvements along Ronald Reagan Boulevard. Per conversations with both the City of Leander and CTSUD confirmed that their negotiations for a wholesale water agreement have been put on hold. Until these negotiations are finalized, it appears that MUD formation and service agreements with CTSUD will be the pattern. Potential MUD's will have to rely on proximity to the 20-inch waterline along Hwy 29. Another option is to enter into agreements with existing MUDs receiving water from CTSUD and tie into their water system.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 6

City of Leander CCN Phasing Plan The main transmission line was divided into four (4) segments as presented on the Water Line Phasing Plan Exhibit included with this summary letter. To create a base line for determining the infrastructure required to serve parcels lying within the City of Leander's jurisdiction, the demands associated with providing wholesale service to CTSUD were ignored, under the assumption that any associated upsizing and/or infrastructure improvements would be funded through revenues generated by the wholesale agreement. Phase I line sizes were selected to provide approximately 10-years of service prior to Phase II improvements, based upon a maximum allowable line velocity of five (5) feet per second (fps). Segments A-B and B-C have been sized for the ultimate capacity identified in the KFA Water Master Plan during Phase I; therefore a Phase II upgrade is not needed. Based on discussions with the City of Leander, Segment B-C is scheduled to commence construction in the summer of 2010 and be completed in December 2010. The following table summarizes the proposed transmission line phasing:

Parmer Lane Water Transmission Line Phase I Line Size (in.) 42 30 12 10 Phase II Line Size (in.) N/A N/A 16 20

Segment A-B B-C C-D D-E

The primary source of water to the southern study area has been assumed to be the proposed transmission main that would tie into the proposed Brushy Creek Regional Utility Authority (BCRUA) transmission main at the intersection of New Hope Road and traverse north along the Parmer Lane extension/Ronald Reagan Blvd that bisects the study area. The first segment of this transmission line, Segment A-B, has been included in the City of Leander's CIP to be completed by 2015. However the construction of this transmission line is dependent on the demand. Prior to completion of the above proposed transmission main, an interim option exists to utilize an existing waterline which runs eastward along Crystal Falls Parkway to its intersection with FM 2243. This 24inch waterline is fed by a 16" waterline. The water line is 16-inches from old US 183 to approximately 1000-ft west of Toll Road 183A. The remaining 1000-ft which takes the line to Toll Road 183A becomes a 24-inch line. Based on a line velocity of 5 fps, the estimated total capacity of this 16" waterline is approximately 2,785 LUEs. The City Engineer estimates that there are approximately 750 LUEs currently served by the 16-inch water line. Thus, the 24-inch water line in Crystal Falls Parkway appears to have a remaining capacity of approximately 2,000 LUEs.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 7

Wastewater Phasing Plan The wastewater phasing plan was based on the piping network in the Wastewater Master Plan provided by KFA. The study area was divided into two (2) general basins: San Gabriel and Brushy Creek/Parmer. From the basins, sub-basins were developed in order to determine the drainage boundaries based on topographic information. Wastewater interceptors were determined based on the sub-basins and sized according to the LUEs per sub-basin. The Wastewater Phasing Plan Exhibit has been included with this letter for reference. The exhibit outlines the various interceptors along with their sizes. The wastewater line sizes were selected using an approach similar to the one used to size the water lines. Phase I line sizes were selected to provide service for 10-years of growth. Segments BCRI 1 and BCRI 2, which are scheduled to commence construction in June 2010 and completed by December 2010, will be constructed to the ultimate size identified in the Wastewater Master Plan, therefore a Phase II upgrade is not needed. Phase II line sizes were selected to provide service, at minimum, through the year 2029. The following table summarizes the wastewater segments and their respective line sizes for Phases I and II:

Segment BCRI1 BCRI2 BCRI3 BCRI4 BCS1 BCS4 BCS5A BCS5B BCS6A BCS6B SGEI1 SGEI2 Wastewater Service Network Phase I Line Size (in) 36 30 18 15 15 12 8 12 15 18 27 24 Phase II Line Size (in) N/A N/A 27 N/A N/A N/A N/A N/A N/A N/A N/A N/A

All properties north of the South San Gabriel River would utilize the proposed San Gabriel East Interceptors (SGEI) and Wastewater Treatment Plant (WWTP) for wastewater service. The area north of the San Gabriel River and south of State Highway 29 is divided by a natural ridge line (the Ridge) which splits the area into two (2) basins, north of the Ridge and south of the Ridge. Tracts south of the Ridge and north of the San Gabriel River can take advantage of the natural topography and utilize gravity flow to connect to SGEI-1. The tracts that lie north of the Ridge will have two options for obtaining wastewater service. They will have to build another interceptor that travels southeast of the Ridge and connect into the San Gabriel WWTP or they can build a force main and pump to SGEI-1. Prior to construction of the SGE interceptors, an interim solution for wastewater service for tracts north of the South San Gabriel River would be to construct a lift station and forcemain to pump to the Liberty Hill-LCRA wastewater system.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 8

Properties south of the San Gabriel River would utilize the proposed Brushy Creek Interceptor. Segment 1 of the Brushy Creek Regional Interceptor (BCRI) 1 has been constructed up to County Road 179. The July 22, 2009 draft of this report recommended that available resources be focused on completing BCRI 1 and constructing BCRI 2 to provide wastewater service north to the intersection of Ronald Reagan Boulevard and FM 2244. On April 1, 2010 the City of Leander joined the Brushy Creek Regional Wastewater System (BCRWWS) allowing the City to tie into the Brushy Creek Regional Interceptor (BCRI). As noted above, the construction of BCRI 1 and 2 is planned to begin June of 2010 with an expected completion date of December 2010. Developments in this area can either tie into the system via gravity flow or construct lift stations and force mains to pump directly to the interceptor. Furthermore, the City of Leander's WWTP recently renewed their permit for the 2.25 million gallon per day (MGD) plant. The plant is currently operating at approximately 1.1 MGD average daily flow. Once the Blockhouse Creek Interceptor is complete, approximately 335,000 gallons per day (gpd) will be diverted from the Leander WWTP which will create additional capacity at the plant. Another short term option for parcels in the Leander Service area would be to construct a lift station and force main in a central location (e.g. FM 2243 and Reagan Blvd.) and pump directly to the Leander WWTP. Cost Apportionment Plan Baseline costs per LUE were developed for Phase I water and wastewater service to form the basis of the cost apportionment plan. The "break even" cost for any given parcel would then be the cost per LUE from the tables below, plus the cost per LUE for any additional infrastructure necessary to convey water or wastewater from the proposed Phase I water (wastewater line). Unit construction costs for water and wastewater lines were based on costs found in the KFA master plans for the City of Leander, when available. This was done to facilitate comparison of costs projected in this study to costs in the KFA Master Plans. For water service, the main concern at this time is to install the Parmer Lane Transmission Line, which would connect at the BCRUA water main at New Hope Road and extend to San Gabriel Parkway providing service to all properties south of San Gabriel Parkway. As mentioned above, costs associated with upsizing or other improvements to provide wholesale service to CTSUD have been ignored, and assumed to be funded through wholesale water service revenues. In this way, a baseline cost to provide water service to the study area within the City of Leander's jurisdiction could then be determined upon which to base the cost apportionment plan. The transmission line was divided into four (4) segments as mentioned above. Cost apportionment factors were then determined for each segment based on the total number of LUEs each line segment can provide, assuming a maximum line velocity of five (5) fps. For any given tract within the service area, a baseline cost participation share can then be determined by multiplying the total number of LUEs to be served by the sum of the cost factors for each line segment required to provide service to the property. For example, to provide water service for 100 LUEs to parcel number 48, the baseline cost participation share would be: 100 x $144.06 = $14,406. For water service for 100 LUEs to parcel number 22, the baseline cost participation share would be: 100 x ($144.06+$312.19+$246.23) = $70,248.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 9

Water Cost Apportionment Table Line Segment A-B (1) B-C (2) C-D (3) D-E (4) Line Size 42" 30" 12" 10" LUE 19191 9791 1567 1088 Cost $2,764,720 $1,141,380 $385,850 $408,485 Cost/LUE $144.06 $116.57 $246.23 $375.45

The wastewater cost apportionment was based on the same concept used for the water cost apportionment. As stated above in the wastewater section, the line sizes were determined based on population and demand projections. From the population forecast, the peak wet weather flow (PWWF) was determined. The PWWF was then used as the basis to determine the capacity of each wastewater line segment in terms of LUEs. This allowed calculation of the cost per LUE of each wastewater line segment. Similar to the approach used for water, a baseline cost participation share for any given tract within the service area can be determined by multiplying the total number of LUEs to be served by the sum of the cost factors for each line segment required to provide service to the property. The "break even" cost for any given tract would then be the cost per LUE from the table below plus the cost per LUE for infrastructure to convey wastewater to each line segment. The table below details each line segment, the size, cost, and cost per LUE.

Wastewater Cost Apportionment Table Line Segment BCRI1 BCRI2 BCRI3 BCRI4 BCS1 BCS4 BCS5A BCS5B BCS6A BCS6B SGEI1 SGEI2 Line Size (in) 36 30 18 15 15 12 8 12 15 18 27 24 LUE 9,161 9,161 3,893 4,911 2,732 2,679 1,125 2,089 2,938 2,330 11,080 7,545 Cost $2,545,000 $2,421,785 $2,717,108 $2,862,539 $3,564,135 $1,992,494 $1,165,282 $1,527,897 $1,528,748 $1,580,988 $3,145,676 $4,368,100 Cost/LUE $278 $265 $698 $583 $1,305 $744 $1,036 $731 $520 $678 $284 $579

The cost apportionment plan assumes that the City of Leander would be responsible for the capital cost of site-specific infrastructure improvements such as storage tanks, pump stations, lift stations, and treatment plants, in exchange for the developer absorbing the cost of distribution and collection. However, the City could, at its option, decide to negotiate with developers on the portion of the baseline cost participation share, determined above, to be paid by the developer, as well as site specific infrastructure costs.

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Final Approved Version April 21, 2010 Page 10

Reagan Parmer Utility Phasing Plan Leander City Council approved on May 6, 2010

Information

FINAL Reagan Parmer Corridor Study

10 pages

Find more like this

Report File (DMCA)

Our content is added by our users. We aim to remove reported files within 1 working day. Please use this link to notify us:

Report this file as copyright or inappropriate

1298232


You might also be interested in

BETA
FINAL Reagan Parmer Corridor Study