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Home My WebLink AboutSanitary Sewer ReportSanitary Sewer Report for Tower Point Infrastructure Development Phase 12, Lots 1-3, Block 2 College Station, Texas Prepared for: Weiner Development Corporation Prepared by: Walter P. Moore & Associates, Inc. 1301 McKinney, Suite 1100 Houston, TX 77010 TBPE Firm Registration No, 1856 March 21, 2011 Revised April 27, 2011 6F Walter P. Moore and Ass( TBPE Firm Registration SANITARY SEWER OVERVIEW Introduction The sanitary sewer line is to serve Tower Point Subdivision Phase 12, Lots 1-3, Block 2 located in College Station Texas. The sanitary sewer has been prepared in general conformance with the requirements of College Station and TxDOT. The purpose of the report is to verify adequate capacity of the proposed sanitary sewer line for the drainage area discharging into the system for the commercial development. This sanitary sewer analysis consists of this narrative plan, the accompanying exhibits included in the appendices. PROJECT DESCRIPTION Location and Outfall Information The site is located is at approximately Latitude 30' 33' 48" N and Longitude 96' 15' 57" W determined using the USGS map. The site is located in the Wellborn SE Quadrangle Brazos County, Texas. The site slopes from north to south of the property. Existing Conditions The site of the project is located approximately 2900 feet from the northwest corner of the intersection of Highway 6 and Highway 40 in College Station, Texas. The site is bounded by Arrington Road to the north, Highway 6 to the east, and the detention Area of Phase 14, Lot 4 Block 2 on the west and south. The project size is approximately 5.44 acres in size and is currently not developed. The site consists of primarily rocky soil with minimal vegetation. Sanitary Sewer Report Tower Point Infrastructure Development— Phase 12, Lots 1-3, Block 2 Page 2 Proposed Site Conditions Proposed development consists of a restaurant and commercial retail shops with associated parking, drives, sidewalk, and landscaping. The public infrastructure being constructed consists of new private roadways, public water mains, public storm sewer systems, and public sanitary sewer systems. The public sanitary sewer will be connected to an existing manhole on an existing 27" sanitary sewer within a 20' wide easement located north of Arrington Road. The new sanitary sewer extension will extend south across Arrington Road to serve future development on lots 1, 2, and 3 (See Exhibit 1). SANITARY SEWER ANALYSIS Existing Analysis The existing sanitary manhole north of Arrington Road and approximately 380' west of Highway 6 will be the point of connection and will be collecting Lots 1, 2, and 3, which is approximately 5.44 acres of commercial development (See Exhibit 2), The existing 27" sanitary sewer system north of Arrington Road has a maximum peak hourly flow of 1.10x10A7gpd or 16.96cfs and slopes to the east towards Highway 6, Proposed Analysis The proposed sanitary sewer velocity and capacity calculations are shown in the appendix. The proposed sanitary sewer drainage area discharging to the existing system is analyzed below: To existing 27" sanitary sewer.- A=5.44 acres Capita=30 persons/acre Retai I=600gpd/person Design (8" PVC) _> Q Average Daily Fli = 97,920gpd C Peak Hourly Fl. = P Average Oall Flow )*(4) Sanitary Sewer Report Tower Point Infrastructure Development- Phase 12, Lots 1-3, Block 2 Page 3 Q PeakHounyFbw = 391680gpd or 0.606cfs Ke]\�y��ly��\I The existing 27" sanitary sewer system has adequate capacity to handle the new sanitary sewer flows discharging to the existing system at the existing sanitary manhole connection point located north of Arrington Road and approximately 380' west of Highway 6. In addition, the sanitary sewer extension has adequate capacity to handle Lots 1, 2, and 3, which is approximately 5.44 acres of commercial development. Sanitary Sewer Report Tower Point Infrastructure Development— Phase 12, Lots 1-3, Block 2 Page 4 NA j 1� I I OT 34 _ I I I' I J SLOT 33 i I - --- - -- 1 ill I w9 Y03 O m J O J BLOCK 2 QT 31 LIA 40 40 80 SCALE: 1•=40' INLET 11LIA AREA = 0.21 ACRES (OVERLAND FLOW) Tc = 10 MINUTES Q = 1.64 CFS FUTURE 1 (Fii AREA = 1.08 ACRES (PIPED IN) TO = 10 MINUTES Q = 7.43 CFS INLET 2 12 AREA = 0.21 ACRES (OVERLAND FLOW) Tc = 10 MINUTES Q = 1,57 CFS FUTURE 2 (F2) AREA = 1.08 ACRES (PIPED IN) Tc = 10 MINUTES Q=7.43CFS FUTURE 3 (F31 AREA = 2.03 ACRES (PIPED IN) Tc = 10 MINUTES Q = 15.90 CFS FUTURE 4 (F41 AREA = 0.80 ACRES (PIPED IN) TO = 10 MINUTES Q = 6.23 CFS WALTER P MOORE PNaEm xune . TOWER POINT INFRASTRUCTURE PLANS FOR PHASE 12, LOTS 1-3, BLOCK 2 IN P660C1ATION WIIN W D WEINER DEVELOPMENT CORPORATION 520 POST OAK BOULEVARD SUITE 850 HOUSTON, TEXAS 77027 PHONE: 713-623-0188 FAX: 713-623-0178 w.mv v. wae.m ASaMWe.12 IBPEFInnflpbintlonlb l0•A P, ��NEWNP SL'WVFN � 111 _ N0. MTE flEYI610N __ �� `�� DRAINAGE & CA CULAT ON6 ��G7E1 Exhibit 1........................................................................................Sanitary Sewer Layout Exhibit 2............................................................ Proposed Sanitary Sewer Drainage Area Exhibit 3......... Tower Point Phase 12, Lots 1-3, Block 2 Sanitary Sewer Design Calculations Sanitary Sewer Report Tower Point Infrastructure Development— Phase 12, Lots 1-3, Block 2 Page 6 INVIMIloolms a ® g � m a � e EXHIBIT 2 n J11 NAM11 low 0 N U � C � N W ` O � ti O ry Y U O m Q ry w H x a Sanitary Sewer Report for Tower Point Infrastructure Development Phase 12, Lots 1-3, Block 2 College Station, Texas Prepared for: Weiner Development Corporation Prepared by: Walter P. Moore & Associates, Inc. 1301 McKinney, Suite 1100 Houston, TX 77010 TBPE Firm Registration No, 1856 March 21, 2011 Revised April 27, 2011 OF Walter P. Moore and ASSOCiata' TBPE Arm Registration No.1 on Sanitary Sewer Report for Tower Point Infrastructure Development Phase 12, Lots 1-3, Block 2 College Station, Texas Prepared for: Weiner Development Corporation Prepared by: Walter P. Moore & Associates, Inc. 1301 McKinney, Suite 1100 Houston, TX 77010 TBPE Firm Registration No. 1856 March 21, 2011 Revised April 27, 2011 I TABLE OF CONTENTS SANITARY SEWER OVERVIEW .......... PROJECT DESCRIPTION ................... SANITARY SEWER ANALYSIS ........... CONCLUSION .................................... APPENDIX.......................................... SANITARY SEWER OVERVIEW Introduction The sanitary sewer line is to serve Tower Point Subdivision Phase 12, Lots 1-3, Block 2 located in College Station Texas. The sanitary sewer has been prepared in general conformance with the requirements of College Station and TxDOT. The purpose of the report is to verify adequate capacity of the proposed sanitary sewer line for the drainage area discharging into the system for the restaurant and commercial development. This sanitary sewer analysis consists of this narrative plan, the accompanying exhibits included in the appendices. PROJECT DESCRIPTION Location and Outfall Information The site is located is at approximately Latitude 300 33' 48" N and Longitude 96' 15' 57" W determined using the USGS map. The site is located in the Wellborn SE Quadrangle Brazos County, Texas. The site slopes from north to south of the property. Existing Conditions The site of the project is located approximately 2900 feet from the northwest corner of the intersection of Highway 6 and Highway 40 in College Station, Texas. The site is bounded by Arrington Road to the north, Highway 6 to the east, and the detention Area of Phase 14, Lot 4, Block 2 on the west and south. The project size is approximately 5.44 acres in size and is currently not developed. The site consists of primarily rocky soil with minimal vegetation. Sanitary Sewer Report Tower Point Infrastructure Development— Phase 12, Lots 1-3, Block 2 Page 2 Proposed Site Conditions Proposed development consists of a restaurant and commercial retail shops with associated parking, drives, sidewalk, and landscaping. The public infrastructure being constructed consists of new private roadways, public water mains, public storm sewer systems, and public sanitary sewer systems. The public sanitary sewer will be connected to an existing manhole on an existing 27" sanitary sewer within a 20' wide easement located north of Arrington Road. The new sanitary sewer extension will extend south across Arrington Road to serve future development on lots 1, 2, and 3 (See Exhibit 1). SANITARY SEWER ANALYSIS Existing Analysis The existing sanitary manhole north of Arrington Road and approximately 380' west of Highway 6 will be the point of connection and will be collecting Lots 1, 2, and 3, which is approximately 5.44 acres of commercial development (See Exhibit 2). The existing 27" sanitary sewer system north of Arrington Road has a maximum peak hourly flow of 1.10x10A7gpd or 16.96cfs and slopes to the east towards Highway 6. Proposed Analysis The proposed sanitary sewer velocity and capacity calculations are shown in the appendix. The proposed sanitary sewer drainage area discharging to the existing system is analyzed below: To existing 27" sanitary sewer., A=5.44 acres; Restaurant=6000 sf Capita=30 persons/acre Retail=25gpd/cap Restaurant=600gpd/1000 sf Design (8" PVC) => Q Average Dairy Flow = 4,080gpd + 3,600gpd = 7,680gpd Sanitary Sewer Report Tower Point Infrastructure Development- Phase 12, Lots 1-3, Block 2 Page 3 Q Peak Houry Flaw — (Q Average Daly Flow )"(4) Q Peak Hoa,ly Flow = 30,720gpd or 0.0475cfs CONCLUSION The existing 27" sanitary sewer system has adequate capacity to handle the new sanitary sewer flows discharging to the existing system at the existing sanitary manhole connection point located north of Arrington Road and approximately 380' west of Highway 6. In addition, the sanitary sewer extension has adequate capacity to handle Lots 1, 2, and 3, which is approximately 5.44 acres of commercial development. Sanitary Sewer Report Tower Point Infrastructure Development— Phase 12, Lots 1-3, Block 2 Page 4 APPENDIX Exhibit 1....................................................................................... Sanitary Sewer Layout Exhibit 2............................................................Proposed Sanitary Sewer Drainage Area Exhibit 3......... Tower Point Phase 12, Lots 1-3, Block 2 Sanitary Sewer Design Calculations Sanitary Sewer Report Tower Point Infrastructure Development- Phase 12, Lots 1-3, Block 2 Page 5 i J �\ ppN _ I - _ I ITF � I JJ _l�4 �-t�f,. II III I ab NOlOtlIWV\ ._--_—_.. _ .__ III � IL--- -- IN 1:04MEHOWINWA EXHIBIT 3 0