Lower Sacramento River regional project

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" rowspan="2" width=185 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <A HREF="index.htm" TARGET="_top" TITLE="David Ford Consulting Engineers"><U><B><IMG SRC="0d058960.png" border=0 width="88" height="150" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A></div> <bR> <div>    <FONT SIZE="1" COLOR="#000000" FACE="Verdana" > </FONT></div> <div> <B> <TABLE BORDER="0" CELLPADDING="4" CELLSPACING="1" WIDTH="156" BORDERCOLORLIGHT="#FFFFFF" BORDERCOLORDARK="#FFFFFF" FRAME="VOID" RULES="NONE" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 27 WIDTH="146"><div> David Ford Consulting Engineers, Inc.</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 27 ><NOBR><div> 2015 J Street, Suite 200</div> <div> Sacramento, CA 95811</div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 27 WIDTH="146"><div> tel: 916.447.8779</div> <div> fax: 916.447.8780</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 27 WIDTH="146"><div> <A HREF="mailto:support@ford-consulting.com" TARGET="_top" TITLE="mailto:support@ford-consulting.com"><U>support@ford-consulting.com</U></A></div> </tD> </tR> </TABLE></B></div> <div>    </div> <bR> <div> <A HREF="index.htm" TARGET="_top" TITLE="David Ford Consulting Engineers"><U>Home</U></A></div> <div> <A HREF="id461.htm" TARGET="_top" TITLE="About us"><U>About us</U></A></div> <div> <A HREF="news.htm" TARGET="_top" TITLE="News"><U>News</U></A></div> <div> <A HREF="hydrologic_engineering.htm" TARGET="_top" TITLE="Hydrologic engineering"><U>Hydrologic engineering</U></A></div> <div> <A HREF="water_resource_planning.htm" TARGET="_top" TITLE="Water resource planning"><U>Water resource planning</U></A></div> <div> <A HREF="flood_economic_and_risk_analyses.htm" TARGET="_top" TITLE="Flood economic and risk analyses"><U>Flood economic/risk analyses</U></A></div> <div> <A HREF="flood_warning.htm" TARGET="_top" TITLE="Flood warning"><U>Flood warning</U></A></div> <div> <A HREF="decision_support_system_development.htm" TARGET="_top" TITLE="Decision support system development"><U>Decision support systems</U></A></div> <bR> </td> <td valign="top" colspan=2 height=40 BGCOLOR="#3366CC" TEXT="#080000" bgproperties="fixed" background="14400980ezthpx.png"> <div> <B>Lower Sacramento River regional project</B></div> <div> </div> </td> </tr><tr> <td valign="top" height=440 colspan=2 BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="06c00962egerdp.png"> <div> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="547" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP COLSPAN=3 BGCOLOR=#CC0000 HEIGHT= 16 WIDTH="537"><div> <B>Situation</B></div> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 245 WIDTH="537"><div> The Sacramento River basin, located in the northern half of California's Central Valley, covers an area of approximately 26,300 sq mi. A long history of flooding in this basin and the adjacent San Joaquin River basin has motivated several studies and flood protection improvement projects headed by federal, state, and local government agencies. The Sacramento Area Flood Control Agency (SAFCA) is the local agency in charge of providing flood protection to the greater Sacramento area. In 2002 SAFCA developed a flood protection design on the lower Sacramento River to increase the level of flood protection to the Sacramento Metro area. However to obtain federal cost sharing for the proposed project, SAFCA was required to complete a benefit/cost analysis for the proposed design.   </div> <div> The Sacramento Area Flood Control Agency asked us to evaluate the flood inundation reduction benefits of the proposed design, which included modifications to several existing flood protection features.   </div> <bR> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 BGCOLOR=#339933 HEIGHT= 16 WIDTH="537"><div> <B>Action</B></div> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 245 WIDTH="537"><div> Following current US Army Corps of Engineers procedures, we computed the expected annual damage (EAD) for the study area using software developed by the Hydrologic Engineering Center (HEC). The Corps' procedures integrate hydrologic, hydraulic, geotechnical, and economic information to compute flood damage. The procedures also account for the impact of uncertainty in this information, using probability distributions for required inputs rather than single average values. We used 62 flood impact areas in the Sacramento River basin to evaluate the economic benefits of the proposed alternatives. These impact areas are shown in the figure.</div> <div> We solicited expert opinion on levee failure analysis to incorporate into the hydraulic model used to develop the stage-frequency functions used in our analysis. 13 different sets of stage-frequency functions were used to account for possible upstream levee failure scenarios. The EAD results of these scenarios were averaged to single values to report project benefits.</div> <bR> </tD> </tR> <tR> <tD VALIGN=TOP COLSPAN=3 HEIGHT= 494 WIDTH="537"><div> <IMG SRC="23060e80.jpg" border=0 width="352" height="488" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </tD> </tR> </TABLE></div> <bR> <bR> <bR> <bR> </td> </tr></table></body>