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Elm ForkFlood Protection<strong>and</strong> RecreationMay 1, 2008Mike Wayts, PE, CFMAssociate<strong>Freese</strong> <strong>and</strong> <strong>Nichols</strong>Dallas, TexasSteve Parker, P.E., CFMMikel Wilkins, P.E.Trey Shanks
Elm ForkFlood Protection<strong>and</strong> Recreation
Elm ForkFlood Protection<strong>and</strong> Recreation932 acres inundated101 structures (100 yr flood)58 structures (25 yr flood)flood depths > 12 feet
Elm ForkFlood Protection<strong>and</strong> Recreation
Elm ForkFlood Protection<strong>and</strong> Recreation
Elm ForkFlood Protection<strong>and</strong> Recreation932 acres inundated101 structures (100 yr flood)58 structures (25 yr flood)flood depths > 12 feet
Elm ForkFlood Protection<strong>and</strong> Recreationproposed elm fork flood protectionproject includedmañana/spangler leveedaniels levee <strong>and</strong> pump stationbypass swaleestimated construction cost ofproject - $14.8 million
trinity river committee briefed in august of 2004Elm ForkFlood Protection<strong>and</strong> Recreationapproved by city council in october of 2004Project/LocationEstimated Costd1 luna road south l<strong>and</strong> acquisition $ 2,100,000d2 bypass swale $ 6,440,000d3 levee/storm water pump station $ 4,100,000d4 mañana drive/spangler road reconstruction $ 3,500,000subtotal (professional services <strong>and</strong> construction costs) $16,140,000open space/recreational l<strong>and</strong> acquisition $ 7,185,000california crossing dog park $75,000subtotal $23,400,000phase 1 sports complex $ 6,000,000total $29,400,000
Elm ForkFlood Protection<strong>and</strong> Recreationstorm water managementconceptrecreational opportunitiestransportation linkagel<strong>and</strong> use plan
hotel site development (2004) inbypass swale alignmentElm ForkFlood Protection<strong>and</strong> Recreationwaste material located inproposed pumpstation <strong>and</strong> levee area7 of 18
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Elm ForkFlood Protection<strong>and</strong> Recreation
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Elm ForkFlood Protection<strong>and</strong> Recreation
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Elm ForkFlood Protection<strong>and</strong> Recreationmananaspanglernewkirknorthwest highwayloop 12
mananaElm ForkFlood Protection<strong>and</strong> Recreationspanglernorthwest highwaynewkirkloop 12
Storm event 100 year 50 year 25 year# structuresflooded22 5 2# parcels flooded 18 4 1# structuresremoved# parcelsremoveddalcad value ofremovedstructures% structuresremoved38 55 5829 43 46$26.9 million $30.8 million $31.7 million63% 92% 97%% value removed 85% 97% 99%Elm ForkFlood Protection<strong>and</strong> Recreation
ih 35Elm ForkFlood Protection<strong>and</strong> Recreationcutting off split flow greatlyreduces the frequency ofstreet flooding in protectedarea improvingnorthwest highwayloop 12cdc permitting requirementnot applicable to future fillareas within the protectedzoneelimination of daniels levee<strong>and</strong> pump station providesmore area for redevelopmentof the northwest highwaycorridor
ih 35Elm ForkFlood Protection<strong>and</strong> Recreationwetl<strong>and</strong> chain <strong>and</strong> spillwayenhancements mitigate addedelm fork flow from cutting offsplit flow reach <strong>and</strong> provides awater quality componentnorthwest highwayloop 12compliments trinity rivercorridor l<strong>and</strong> use plancreation of accessible naturalamenities compliments plansto extend trinity trail towildwood drive <strong>and</strong> northwardto proposed elm fork trailfacilitates the expansion ofbike trails, generates morepark visitors
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