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Drop Structure Design for Wastewater and Stormwater Collection Systems

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Drop Structure Design for Wastewater and Stormwater Collection Systems OpeningPage/Copyright.qxd 1/9/04 3:47 PM Page 1 1998 William Barclay Parsons Fellowship Parsons Brinckerhoff Monograph 14 Drop Structure Design for Wastewater and Stormwater Collection Systems Scott Williamson, P.E. Lead Engineer Parsons Brinckerhoff Quade & Douglas, Inc. August 2001 OpeningPage/Copyright.qxd 1/9/04 3:47 PM Page 2 *MVWX£TVMRXMRK£ 'ST]VMKLX£££4EVWSRW£&VMRGOIVLSJJ£-RG %PP£VMKLXW£VIWIVZIH££2S£TEVX£SJ£XLMW£[SVO£QE]£FI£VITVSHYGIH£SV£YWIH£MR£ER]£JSVQ£SV£F] ER]£QIERW§KVETLMG£IPIGXVSRMG£SV£QIGLERMGEP£MRGPYHMRK£TLSXSGST]MRK£VIGSVHMRK XETMRK£SV£MRJSVQEXMSR£WXSVEKI£SV£VIXVMIZEP£W]WXIQW§[MXLSYX£TIVQMWWMSR£SJ£XLI£TYFPMWLIV 4YFPMWLIH£F] 4EVWSRW£&VMRGOIVLSJJ 3RI£4IRR£4PE^E 2I[£=SVO£2I[£=SVO£ +VETLMGW£(EXEFEWI£+ WilliamsonMonoTOC.qxd 1/9/04 4:13 PM Page i CONTENTS FOREWORD 1.0 INTRODUCTION 4YVTSWI£SJ£XLMW£1SRSKVETL 1SRSKVETL£3VKERM^EXMSR 2.0 DROP STRUCTURE BASIC FUNCTIONS AND TYPES &EWMG£*YRGXMSRW +IRIVEP£(VST£7XVYGXYVI£8]TIW£ERH£'SQTSRIRXW 3XLIV£8]TIW£SJ£(VST£7XVYGXYVIW 'SQTEVMWSR£SJ£(VST£7XVYGXYVI£8]TIW 3.0 PLANNING AND DESIGN CONSIDERATIONS *PS[£:EVMEFMPMX]£ERH£'SPPIGXMSR£7]WXIQ£8]TI )RIVK]£(MWWMTEXMSR (VST£7XVYGXYVI£0SGEXMSR %MV£)RXVEMRQIRX£ERH£:IRXMPEXMSR 3HSV£ERH£'SVVSWMSR£'SRXVSP 7YFWYVJEGI£'SRHMXMSRW£ERH£'SRWXVYGXMSR 3TIVEXMSRW£ERH£1EMRXIRERGI 4.0 DESIGN METHODOLOGY 6SPI£SJ£,]HVEYPMG£1SHIPMRK£MR£(VST£7XVYGXYVI£(IWMKR :SVXI\£(VST£7XVYGXYVIW 4PYRKI£(VST£7XVYGXYVIW 5.0 DROP STRUCTURE APPURTENANCES %GGIWW£7LEJXW 7]WXIQ£1SRMXSVMRK£ERH£'SRXVSPW (IFVMW£7GVIIRMRK APPENDIX A: REVIEW OF DROP STRUCTURE/TUNNEL SYSTEMS APPENDIX B: SUMMARY OF DROP STRUCTURES BY GEOGRAPHICAL LOCATION AND INLET TYPE REFERENCES M WilliamsonMonoTOC.qxd 1/9/04 4:13 PM Page ii MM WilliamsonMonoTOC.qxd 1/9/04 4:13 PM Page iii LIST OF FIGURES CHAPTER 2 8]TMGEP£(VST£7XVYGXYVI£'SQTSRIRXW :SVXI\8]TI£-RPIXW 4PYRKI8]TI£-RPIXW 8]TMGEP£(VST£1ERLSPI£ 7ERMXEV]£7I[IV 'SQTEVMWSR£SJ£%MV£)RXVEMRQIRX£JSV£:EVMSYW£-RPIX£8]TIW 'SQTEVMWSR£SJ£(MQIRWMSRW£JSV£:EVMSYW£(VST£7XVYGXYVI£8]TIW CHAPTER 3 )RIVK]£(MWWMTEXSVW£MR£4PYRKI£-RPIX£(VST£7XVYGXYVIW %PXIVREXMZI£7MXIW£JSV£(VST£7XVYGXYVI£0SGEXMSR (VST£7XVYGXYVI£*SSXTVMRX£ERH£(MQIRWMSRW ,SVM^SRXEP£'SRRIGXMSR£XS£1EMR£8YRRIP :IVXMGEP£%PMKRQIRX£SJ£'SRRIGXMSR£XS£1EMR£8YRRIP 8YRRIP£XS£%HMX£'SRRIGXMSR£JVSQ£'LMGEKS«W£8%64 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