Unlv Event Stadium Planning Update
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PRELIMINARY UTILITY AND ACCESS EVALUATION UNLV EVENT STADIUM PLANNING UPDATE CLARK COUNTY, NEVADA A.P.N. 162-21-802-001, 162-21-802-002, 162-21-802-003, 162-21-802-004, 162-21-802-005, 162-21-810-008, 162-21-810-009 Prepared for: University of Nevada Las Vegas c/o Mr. David Frommer 4505 S. Maryland Parkway Box 451027 Las Vegas, Nevada 89154 Prepared by: July 2014 09751003 2014© Kimley-Horn and Associates, Inc. 1. UTILITY REVIEW Kimley-Horn conducted a preliminary review of the existing utility infrastructure for a proposed 60,000 seat stadium generally located at the northeast corner of Koval Lane and Tropicana Avenue. Figure 1 summarizes the utility infrastructure surrounding the site. 1.1 Potable Water System Kimley-Horn met with Las Vegas Valley Water District (LVVWD) to obtain record drawings, and to identify any constraints in the existing potable water system or potential conflicts with the proposed development. The existing offsite potable water system in Tropicana Avenue consists of 12”, 60”, and 90” diameter pipelines running along the southernmost side of Tropicana Avenue. The major lines for connection to the site are the 12” and 60” pipelines from LVVWD system at South Las Vegas Boulevard and East Tropicana Avenue, to Paradise Road and East Tropicana Avenue. Service to the site of interest includes a 2” service lateral to parcel 162-21-802-001, a 12” ACP service lateral to parcel 162-21-802- 005, and two (2) 8” service laterals to parcel 162-21-810-005. The existing offsite potable water system in Deckow Lane includes a 10” diameter pipeline with service potential. Private road, Kelch Drive, contains a 16” PVC pipeline (public) with two (2) 8” service laterals to parcel 162-21-810-005, two (2) 8” service laterals and fire access (hydrant) to parcel 162-21-810-009, and two (2) 8” service laterals to parcel 162-21-810-008. The 16” main line connects to the 12” system in Tropicana Avenue via 16”x12” reducer. Although LVVWD staff was unaware of any major issues in the existing system, under existing demands, they did indicate that a comprehensive water network analysis would be required for the project. The previous site system was serviced from the 12” ACP lateral to parcel 162-21-802-005, and fed from an existing 6’x3’ FMCT combination fire and domestic meters on Tropicana Avenue. Later development removed the existing vault and installed a meter vault per UDACS DWG C-475. It appears the remaining laterals are stubbed and do not currently have meters or backflow devices installed. Further coordination with LVVWD and an in-field analysis should be conducted to confirm the status of these existing utilities. Knowing that FMCT’s are no longer manufactured, one consideration is that any outdated meters and backflow devices may have to be replaced with new equipment. Kimley-Horn recommends that if the proposed site plan advances, Kimley-Horn will complete a comprehensive water network analysis for the proposed utility layout. Data from this analysis, along with meetings and coordination with the LVVWD will define what improvements will be required to the water system in accordance with the site plan. Please refer to the attached existing utilities exhibit for preliminary reference. 1 1.2 Sanitary Sewer System The existing offsite sanitary sewer system in Tropicana Avenue consists of an 18” and 24” (upsized to 27” at parcel 162-21-802-005) diameter pipelines running along the northern side of Tropicana Avenue. The major line for existing points of connection to the site is the 18” sewer line from the Clark County Water Reclamation District (CCWRD) system at South Las Vegas Boulevard and East Tropicana Avenue, to Paradise Road and East Tropicana Avenue. Service to the site of interest includes an 8” stub to parcel 162-21-802-004, and an 8” stub to parcel 162-21-810-005. The existing offsite sanitary sewer system in private road, Kelch Drive, contains an 8” PVC pipeline (public) with single, 8” service laterals stubbed to parcels 162-21-810-005, 162-21-810-009, and 162-21-810-008. Currently there is no sanitary sewer system access in Deckow Lane. Kimley-Horn estimated a peak daily flow of approximately 500,000 GPD for a 60,000 seat stadium (based on previous Stadium Master Plan size). With this estimate, Kimley-Horn met with the Clark County Water Reclamation District (CCWRD) to address any capacity issues, and to identify any major conflict with regards to potentially tapping into the existing system. CCWRD indicated that the existing system in East Tropicana Avenue and Kelch Drive does NOT have the available capacity to support the proposed development. The nearest point of connection for the proposed development is at CCWRD manhole TRU1 located at the Harmon Avenue 60” crosstown interceptor, located approximately 1,600 feet north of the proposed site. Since the existing 12” sewer line in Kelch Drive and LaMar Circle does not have the available capacity to accommodate the estimated demand, this connection would require the installation of a separate sewer line in Kelch Drive and LaMar Circle to E Harmon Avenue in accordance with CCWRD design standards. The estimated cost of the sewer system installation is on the order of $450,000 - $500,000. Further sewer analysis will be required to determine a feasible solution for necessary improvements. Please refer to the attached existing utilities exhibit for preliminary reference. 1.3 Storm Drain System The existing offsite storm drain system in Tropicana Avenue consists of a 48” diameter pipeline along the southern side of Tropicana Avenue, and a 36” diameter pipeline along the northern side of Tropicana Avenue. The 36” pipeline serves a series of catch basins intercepting street flow and site runoff. There are no existing storm drain systems in Deckow Lane or Kelch Drive. There are no existing on-site storm drain systems. Upon further design development, Kimley-Horn recommends a thorough Technical Drainage Study be completed to analyze the upstream and downstream flows, the existing storm drain pipe and inlet system, the impact the proposed project will have on the existing system, and any recommendations (if any) related to the replacement of existing pipes and construction of new pipes and inlets. In addition, it should be noted that the Regional Flood Control District Master Plan has identified a proposed detention basin (TRMC 0033) located near the northwest corner of Tropicana Avenue and Paradise Road. Attached, Figure F-37 (Appendix A) and the following data in Table 1 regarding the proposed detention basin have been provided by Clark County Regional Flood Control District (CCRFCD). 3 Table 1 – Detention Basin Data (CCRFCD Provided) CCRFCD ID TRMC0033 Status Proposed Name Tropicana Wash – McCarran Airport Detention Basin Description 120 ac-ft offline detention basin; peak discharge at approx. 109 ac-ft Depth 13 ft, peak flow discharge occurs at approx. 11.5, so 1.5 ft freeboard Tributary Area 4.32 sq. miles HEC-1 Flow 2075 CFS Design Cost $97,000 ROW Cost $77,000 Construction Cost $607,000 Total Cost $782,000 Design Year Not Given Construction Year Not Given Additional drainage Future analysis will be required to determine the mitigation improvements required for development within this area. Please refer to the attached existing utilities exhibit for preliminary reference. 1.4 Natural Gas System The prospective stadium location and size was presented to Southwest Gas (SWG) for preliminary availability and capacity assessment. SWG provided as-builts delineating the size and location of off-site gas utilities. Existing utilities include a 2” PE and 20” high-pressure STL line residing along the northern side of Tropicana Avenue, a 2-inch PE in Koval Lane, and a 2”- 6” main in Kelch Drive. Based on conservative load estimates from similar-sized stadium projects, SWG advised that the available system would be able to handle the additional load requirements at this time; however, noted the caveat that MGM Grand Hotel and Casino was also considering upgrades which would require significant demand from the existing system. Additionally, SWG emphasized that any potential connection or crossing to the high-pressure gas line in Tropicana Avenue would require potholing prior to construction. SWG advised further coordination throughout the design phase to verify the available capacity of the system in coordination with MGM Grand Hotel and Casino, and to ensure all service requirements are met appropriately. Please refer to the attached existing utilities exhibit for preliminary reference. 1.5 Electrical System According to as-builts we have received from the County, underground telecommunication lines exist along the northern side of Tropicana Avenue. At this time, as-built and record drawing requests have been submitted to NV Energy, and requests to engage in a preliminary study of the existing dry utility system have been made. 4 2. TRANSPORTATION ACCESS The proposed stadium location north of Tropicana Avenue as shown in Figure 2 has vehicle access from three existing driveways on Tropicana Avenue. Deckow Lane borders the property on the west side and Lamar Court borders the property on the east side. Access to both Deckow Lane and LaMar Circle/Kelch Drive are recommended to be provided to the proposed site. It is also recommended that access to Tompkins Avenue (northwest of the site) be provided to provide access to Koval Lane. For improved site access and circulation, consideration should be given to developing a roadway connection between Deckow Lane and Koval Lane to the existing traffic signal on Koval Lane at the MGM Grand exit/entrance. The major access to the site is from Tropicana Avenue, an eight-lane arterial roadway that currently carries approximately 90,000 vpd (NDOT 2012 counts).