' '. APPENDIX A: Engineering LAKE WORTH INLET Palm Beach Harbor

Transcription

1 ' '. APPED A: Engneerng LAKE WORTH LET Palm Beach Harbor

2 AVGATO STUDY FOR LAKE WORTH LET, FLORDA TEGRATED FEASBLTY REPORT AD EVROMETAL MPACT STATEMET APPED A EGEERG

3 AVGATO STUDY FOR LAKE WORTH LET, FLORDA DRAFT TEGRATED FEASBLTY REPORT AD EVROMETAL MPACT STATEMET APPED A EGEERG Table of Contents Subject Paragraph o. Page o. A. TRODUCTO General. 1 A 1 Recommended Plan 2 A 1 B. HYDROLOGY AD HYDRAULCS General 3 A 1 Tdes 4 A 2 Currents 5 A 2 Sea Level Rse 6 A 2 Storm Surge 7 A 3 Shoalng 8 A 3 C. GEOTECHCAL General 9 A 4 Exstng Jetty Stablty A 4 Jetty Stablty Wth Recommended Plan 11 A 4 Channel Sde Slope Selecton 12 A 5 D. DESG AD COSTRUCTO General 13 A 5 Sde Slopes 14 A 5 Overdepths 15 A 5 Advance Mantenance and Settlng Basn Reconfguraton 16 A 5 A-

4 Table of Contents (contnued) Subject Paragraph o. Page o. orth Jetty Stablaton Dsposal Areas Constructon Procedure A 5 A 6 A 6 E. RELOCATOS General 2 A 7 F. OPERATO AD MATEACE General Estmated Annual Cost avgaton Ads A 7 A 7 A 7 G. QUATTES AD COST ESTMATE Summary of Quanttes Summary of Costs A 8 A 8 H. SHP SMULATO STUDY Dscusson Optmaton Agency Techncal Reve A 8 A 9 A 9 LST OF FGURES (fgures follo text) Ttle Fgure o. Projected Future Sea Level Rse at Palm Beach Harbor F 1 LST OF TABLES (tables follo fgures) Ttle Summary of Constructon Quanttes for Recommended Plan Summary of Dredge Areas and Haul Dstances Summary of Dredgng Volumes for Recommended Plan Table o. T 1 T 2 T 3 A-

5 Table of Contents (contnued) LST OF PLATES (plates follo tables) Ttle Plate o. ED Plan Locaton and Vcnty Maps ED Plan mprovements Overve ED Plan STA. + to STA. 23+ Entrance Channel ED Plan STA. 23+ to STA. 46+ Entrance Channel ED Plan STA. 46+ Entrance Channel to STA. 68+ Cut 1 ED Plan STA. 68+ Cut 1 to STA Cut 2 ED Plan orthern and Southern Turnng Basns ED Plan Southern Turnng Basn Exstng Project Advance Mantenance and Settlng Basn Plan Proposed Project Advance Mantenance and Settlng Basn Plan Sde Slope Plan and Typcal Dredgng Sectons Sde Slope Plan and Typcal Dredgng Sectons Typcal Dredgng Sectons Typcal Dredgng Sectons Typcal Dredgng Sectons Typcal Dredgng Sectons Typcal Dredgng Sectons Typcal Dredgng Sectons Beach/earshore Dsposal Plan Typcal Beach Dsposal Secton Proposed Potental Mtgaton/Benefcal Use Stes Typcal Cross Sectons Seagrass and Hardbottom Mtgaton and Hardbottom Mtgaton Plan ODMDS Plan ED Plan Area Breakdon for Volumetrc and Cost Analyss ED Plan Area Breakdon for Volumetrc and Cost Analyss ATTACHMETS (attachments follo plates) Ttle Hydrodynamc Modelng Shp Smulaton Report Geotechncal Attachment nvestgatons and Geologc Condtons Borng Logs and Laboratory Reports VE Study Attachment o. A B C D A-

6 LAKE WORTH LET, FLORDA APPED A EGEERG A. TRODUCTO 1. General. Ths appendx presents the dscusson of applcable desgn consderatons and constructon methods utled to adequately address the project requrements and to establsh a bass for the cost estmates. General requrements for real estate and operaton and mantenance are also presented. 2. Recommended Plan. The recommended plan ncorporates atonal Economc Development (ED) mprovements to the Federal navgaton project at Lake Worth nlet, Florda. These mprovements ould nclude the addton of a ne channel flare on the south sde of the Entrance Channel, a denng of the Entrance Channel by ether 4 or 6 to the north, denng of the nner Harbor Cuts 1 and 2 to provde for a mnmum channel dth of 45, a 15 expanson of the Southern (Man) Turnng Basn to the south, and an expanson of the Southern (Man) Turnng Basn on the north sde to remove a notch currently encroachng nto the basn. The channel ould be deepened to a project depth of 39 feet Mean Loer Lo Water (MLLW) for the nner Harbor and 41 feet MLLW for the Entrance Channel plus applcable alloances and overdepths dscussed n ths Appendx. Refer to Plate 2 for a complete descrpton of the ED project mprovement features. n addton to the navgaton project mprovements descrbed above that are necessary to facltate the safe and effcent navgaton of the desgn vessel, there are other features needed to support the project. These features nclude orth Jetty stablaton, reconfguraton of the Advance Mantenance Zones, reconfguraton of the Settlng Basn, Seagrass Mtgaton Area constructon, and Hardbottom Mtgaton Area constructon as detaled n ths Appendx and other areas of the Feasblty Study Report. A dscusson of the plan formulaton nvolved n the selecton of the Recommended Plan s presented n the man porton of ths report. All soundngs presented n ths report are at MLLW based on the latest tdal epoch avalable from OAA and the project s located geospatally n the orth Amercan Datum of 1983 (AD83). B. HYDROLOGY AD HYDRAULCS 3. General. A project locaton and vcnty map shong the features descrbed belo s provded on Plate 1. The currents and ater surface elevatons n Palm Beach Harbor are subject to tde, the effects of nds, upland dranage, and varatons n barometrc pressure. These factors serve as boundary condtons for the hydraulc forces nfluencng the smaller scale lmts of ths study area. The hydrodynamc model nvestgatons conducted for ths feasblty study are presented n an Attachment to ths Appendx. Attachment A (Hydrodynamc Modelng) ncludes to dmensonal model descrptons and results that ere conducted n support of alternatve evaluatons and an assessment of channel modfcaton mpacts on bay crculaton (.e., currents), channel shoalng and storm surge. A-1

7 4. Tdes. The astronomcal tde s the most mportant factor drvng the crculaton of ater thn the Harbor and n the varaton of ater elevatons. The tde s sem durnal here to hgh aters and to lo aters generally occur n a tdal day. The mean tde range s 2.72 ft and the sprng tde range s 3.26 ft. 5. Currents. Tdal currents n the Palm Beach Harbor entrance channel are strong. The maxmum currents occur n the entrance channel here maxmum flood currents of 6. feet per second (3.6 knots) are experenced and the maxmum ebb velocty s 4. feet per second (2.4 knots). Average flood and ebb veloctes n the entrance channel are 3 feet per second (1.75 knots) and 2 feet per second (1.25 knots) respectvely. At the nner channel the average flood and ebb veloctes are 2.7 feet per second (1.6 knots) and 2.5 feet per second (1.5 knots). n the ntracoastal Wateray (WW) at Peanut sland the average flood and ebb veloctes are both 1.3 feet per second (.75 knots). 6. Sea Level Rse. The geologc record of hstorcal sea level varatons ndcates that both ncreases and decreases n global sea level have occurred. Both global coolng and armng contrbute to sea level change. The atonal Ocean Servce (OS) has compled long term records of measured ater surface elevatons along the Atlantc coast. Ths data s the bass for projectng future relatve sea level rse at Palm Beach Harbor. Relatve sea level (RSL) refers to local elevaton of the sea th respect to land, ncludng the loerng or rsng of land through geologc processes such as subsdence and glacal rebound. t s antcpated that sea level ll rse thn the next years. To ncorporate the drect and ndrect physcal effects of projected future sea level change on desgn, constructon, operaton, and mantenance of coastal projects, the U.S. Army Corps of Engneers (USACE) has provded gudance n the form an Engneerng Crcular, EC (USACE, 211). EC provdes both a methodology and a procedure for determnng a range of sea level rse estmates based on the local hstorc sea level rse rate, the constructon (base) year of the project, and the desgn lfe of the project. Three estmates are requred by the gudance, a baselne estmate representng the mnmum expected sea level change, an ntermedate estmate, and a hgh estmate representng the maxmum expected sea level change. Follong procedures outlned n EC , Appendx B, baselne, ntermedate, and hgh sea level rse values ere estmated over the lfe of the project. Based on hstorcal sea level measurements taken from OS gage at Mam Beach, Florda, the hstorc sea level rse rate as determned to be 2.39 mm/year (.78 ft/year) ( the project base year as specfed as 217; and the project lfe as projected to be 5 years. Fgure F 1 shos the three levels of projected future sea level rse for the lfe of the project. From these curves, the baselne, ntermedate, and hgh sea level rse values at the end of the 5 year lfe of the project ere projected to be.39,.89 ft, and 2.47 ft, respectvely. The total regonal sea level rse predcted by the three scenaros (baselne, ntermedate, and hgh) ll not have a sgnfcant mpact to the performance of the Palm Beach Harbor project. Potental mpacts of rsng sea level nclude overtoppng of atersde structures, ncreased shorelne eroson, and floodng of lo lyng areas. A postve potental mpact of sea level rse on the project s a reducton n requred mantenance due to ncreased depth n the channel. n general, regonal sea level rse (baselne, ntermedate, and hgh) ll not affect the functon of the project alternatves or the overall safety of the desgn vessel. Whle there s expected to be a small ncrease n tdal surge and penetraton for all three scenaros, the structural aspects of the project ll be ether unaffected or can be easly adapted to accommodate the change. A-2

8 7. Storm Surge. An analyss as conducted to determne f there ould be an mpact to storm surge ater levels at the project ste due to proposed deepenng of the Palm Beach Harbor Federal avgaton Project. A to dmensonal hydrodynamc model as used to smulate a year return nterval total storm tde event on to dfferent model bathymetres representng the exstng condton bathymetry and a future bathymetry representng the Federal project th all proposed deepenng and denng of the channels and Harbor. The results of these numercal smulatons ere analyed to determne any potental changes to total storm tde that mght result from the proposed modfcatons to Palm Beach Harbor. Dfferences beteen th and thout project ater level elevatons n the vcnty of the harbor ere less than.1 m. Therefore no sgnfcant mpact of project alternatve to storm surge s antcpated. 8. Shoalng. n order to assess changes to shoalng patterns and volumes resultng from proposed channel modfcatons, a to dmensonal hydrodynamc model as developed that s capable of smulatng complex coupled ave, current and sedment transport processes. The settlng basn to the north of the entrance channel s an ntegral part of the sedment transport dynamcs n the entrance channel area. The settlng basn has been expanded several tmes to reduce shoalng n the entrance channel. ncluded n ths nvestgaton s an evaluaton of the present and proposed settlng basn as ell as recommended modfcaton for greater reducton of shoalng n the navgaton channel. Future mantenance requrements based on model results and hstorcal shoalng volumes for the nner Harbor, hch nclude the nner Channel and Turnng Basns s estmated to be a 9.5% ncrease (1636 cy/yr) of the hstorcal volume (17,224 cy/yr) (See Attachment A, Hydrodynamc Modelng, Table ST1) hch corresponds to the ncrease n project footprnt for the Southern (Man) Turnng Basn. The nner Channel (Cuts 1 and 2) does not currently requre any mantenance due to tdal flushng and ths condton s not antcpated to change based on hydrodynamc modelng results. Snce the Turnng Basns are not dredged as often as the Entrance Channel and Settlng Basn, t should not affect the dredgng frequency. n order to accommodate shoalng that occurs n the selected project alternatve channel depth, advanced mantenance ones ere establshed. Future mantenance requrements based on model results for the Entrance Channel (ncludng Advance Mantenance) predct a shoalng rate of 33, cy/yr and for the Settlng Basns a rate of 68, cy/yr. That s smlar to the current hstorcally measured shoalng rate; hoever, a sgnfcant porton of the volume s trapped n the settlng basn rather than the channel. For purposes of consstency, the predcted shoalng value for the Entrance Channel and Settlng Basn are combned and rounded to, cy/yr. The dredge cycle for the proposed project s once every 2 years (t s once per year currently) as the ne capacty of these optmed features prevents the project from shoalng sgnfcantly above the project depth thn the channel. Therefore, the total mantenance volume estmate s 2, cy/2 yr. Ths s based on an average bass, dependng upon storm actvty or lack thereof, here there may be perods hen dredgng s requred annually and others here dredgng s not requred untl 3 years after the prevous event. Based on experence from other constructon deepenng projects completed by the Jacksonvlle Dstrct, t s antcpated that the frst mantenance event for the project ll not be needed untl the thrd year follong ntal constructon. Ths s prmarly due to the ncorporaton of requred overdepth n the ntal constructon dredgng. The overall estmate s 24 Mantenance Dredgng events over the 5 year project lfe. A-3

9 C. GEOTECHCAL 9. General. The geotechncal nvestgatons and the geologc condtons encountered thn the scope of study are presented n an Attachment to ths Appendx. Attachment C (Geotechncal) ncludes core borng locatons and assocated representatve data. Addtonal nvestgatons ll be requred to enhance the exstng data to brng t to Plans and Specfcaton standards.. Exstng Jetty Stablty. A slope stablty analyss as performed usng SLOPE/W thn the GeoStudo 24 (Verson 6.22) sute to determne the stablty of the exstng channel slopes n the vcnty of both the north and south jetty. Slope geometry as based on nformaton provded by a survey performed n 22. Snce the exact foundaton elevatons for both the north and south jettes are unknon, as descrbed n Attachment C, t as conservatvely assumed that beteen elevaton 23.5 AVD88 and 3. AVD88 the foundaton materal conssts of hgh blo count sand and not jetty stone. Engneerng Manual (EM) Slope Stablty (dated 23) as the gudance used, th Table 3 1 requrng a long term mnmum factory of safety of 1.5. The orstcase (.e., steepest) slope scenaros ere analyed. The results of the slope stablty analyss ndcated that beteen an solated area, from STA 42+5 to STA 45+5, for hch the 22 survey shoed exstng sde slopes steeper than one foot vertcal to to feet horontal (1V:2H), the south jetty (n ts current state) has an nadequate factor of safety of 1.5. The same 22 survey ndcated no specfc areas of concern for the north jetty, and analyss determned that ths jetty has an adequate factor of safety of 1.87 n ts current state. t should be noted that the fnal plans and specfcatons ll be referenced n the project datum, MLLW. Hoever, ths geotechncal analyss as performed usng AVD88 as the datum snce the 22 survey data, for hch the slope stablty model geometres ere based on, as referenced to AVD Jetty Stablty th Recommended Plan. A slope stablty analyss as performed to determne f the proposed dredge desgn template ould mpact the stablty of the exstng jettes located to the north and south of the proposed project. South Jetty: Analyss as performed at locatons here the desgn template ntercepted the exstng slope closest to the jettes. The stablty of the south jetty remaned unaffected, as shon n Fgure 2 of Attachment C, snce the desgn template termnates approxmately 5 feet north (.e. 5 foot buffer) of the toe of the exstng slope. As stated above, the south jetty n ts current state has an nadequate factor of safety based on conservatve assumptons outlned n Attachment C. o jetty stablaton features ll be mplemented snce the proposed dredge desgn template ll not mpact ts stablty n ts current state, and ould therefore be outsde the scope of ths project. orth Jetty: Due to several unknon factors detaled n Attachment C, a 15 foot horontal bench (.e., 15 foot buffer) as establshed n the desgn, beyond the channel sde toe of the north jetty, as an added safety measure. At locatons along the north jetty from STA 39+ to 44+, here the channel template encroached nto the 15 foot buffer, the channel template as adjusted to negate the mpact, or jetty stablaton measures ere ncorporated nto desgn to stable the jetty. The template as adjusted by elmnatng the advanced mantenance n the areas here the desgn template dth extends beyond the exstng template (.e., closer to the jetty). Hoever, an abbrevated area, from approxmately STA to 4+75, stll requred the advance mantenance area due to the vast amount of sand that has been shon to shoal around the north jetty head. The prelmnary desgn of a jetty stablaton feature conssts of sheet ple all placed near the jetty toe n ths area hch stll requred advanced mantenance. Detals of the prelmnary analyss ncludng exstng condtons, th project condtons, the methods used, and results are presented n Attachment C. Based on ths prelmnary evaluaton, a PZC 26 sheet, extendng belo the surveyed A-4

10 bottom to an elevaton 6. AVD88 s currently recommended to stable the exstng jetty. Horontal extents of ths feature are currently antcpated to extend parallel to the jetty toe from approxmately STA to Desgn detals such as exact locaton, dth, depth (mnmum tp elevaton), and sheet ple type ll need to be refned durng the PED phase usng data resultng from the upcomng geotechncal exploraton, scour analyss, and other desgn factors. 12. Channel Sde Slope Selecton. The avalable Geotechncal data ndcates that the subsurface condtons for the areas est of STA 45+ are composed of ether thnly bedded and moderately hard lmestone and sandstone, or layers of sand, slty sand, lmestone and sandstone; therefore, sde slopes of 1 foot vertcal to 1 foot horontal (1V:1H) ere prelmnarly selected for these areas. As an excepton n these areas, the southern expanson of the Man Turnng Basn ll have a tered system, th 1 foot vertcal to 3 feet horontal (1V:3H) slopes above EL 3. MLLW, and 1 foot vertcal to 1 foot horontal (1V:1H) belo EL 3. MLLW. East of STA 45+, borngs ndcate sand and slty sand; therefore, all slopes shall be no steeper than 1 foot vertcal to 3 feet horontal (1V:3H). The sde slopes ere derved from hstorcal project nformaton, an analyss of the materals to be dredged and exstng channel bathymetry. Addtonal nformaton s provded n Secton D belo. D. DESG AD COSTRUCTO 13. General. A project locaton map s shon on Plate 1. The proposed project plan of mprovements to the Federal navgaton channel s shon on Plates 2 through 8, and typcal sectons of the channel are provded on Plates 13 through Sde Slopes. For estmatng purposes, the average sde slope for the proposed excavaton as determned to be 1 vertcal on 3 horontal (1V:3H) for the Entrance Channel Staton + to Staton 45+ and 1 vertcal on 1 horontal (1V:1H) for the remander of the project th the excepton of the southern expanson of the Man Turnng Basn hch utles a combned slope of 1V:1H belo elevaton 3 MLLW and 1V:3H above 3 MLLW, refer to Plates 11 through 18 for detals. 15. Overdepths. An addtonal 2 foot of requred overdepth and 1 foot of alloable overdepth are ncluded n the estmated excavaton quanttes. The requred overdepth ould be necessary to facltate future mantenance of the channel due to the exstence of consoldated materal at project depth. The alloable overdepth ould be ncluded to provde for naccuraces n the dredgng process n accordance th ER , avgaton and Dredgng Operatons and Mantenance Polces. 16. Advance Mantenance and Settlng Basn Reconfguraton. The exstng project ncorporates both advance mantenance and settlng basn features as shon on Plate 9. n order to optme the performance of these features, hydrodynamc modelng as conducted and the resultng reconfguraton of the advance mantenance ones and settlng basns are shon on Plate. The prmary purpose of the reconfgured features s to trap sedment outsde of the Federal navgaton channel thus preventng shoalng of the channel and decreasng the frequency of mantenance dredgng needed to keep the channel open and free from navgaton restrctons. 17. orth Jetty Stablaton. The prelmnary slope stablty analyss determned that the orth Jetty ll requre stablaton features to ensure jetty stablty once the proposed project has been constructed. The stablty of a porton of the orth Jetty s affected by the 4 foot denng of the A-5

11 Entrance Channel to the north coupled th the need to ncorporate advance mantenance one C (AMZ C) at the tp of the jetty to capture the lttoral sand transport. The stablaton feature, sheet ple, as developed usng engneerng judgment based on the lmted core borng data avalable and hstorcal records for the jetty constructon. Refer to Plates 4,, and 15 for detals regardng the locaton and length of the proposed sheet ple. A complete and thorough analyss of the subsurface condtons, desgn of the stablaton feature, as ell as any ne nformaton pertanng to the exstng jetty tself ll be requred durng the PED phase based on the results of the ne geotechncal exploraton program. 18. Dsposal Areas. t s antcpated that all of the materal to be excavated from the Entrance Channel from Staton 18+ (project begnnng) up to Staton 45+ ould be placed n the nearshore dsposal area mmedately offshore of the exstng permtted beach dsposal area located south of the nlet (R 76 to R 79, belo the MHW lne, landard of the 17 ft contour). Currently, some real estate easements are not avalable for the exstng beach dsposal area (R 76 to R 79, above the MHW lne). Hoever, f they become avalable at the tme of constructon then beach qualty materal ould be placed to capacty n the beach dsposal area pror to placement n the nearshore dsposal area. Addtonally the O&M program, separate from ths project, s orkng on permttng the expanded beach dsposal area. f the permt for the expanded beach dsposal area s obtaned pror to constructon of ths project, t could be consdered for ths project. Requrements nvolved th the usage of the exstng beach dsposal area and procurement of a proposed expanded beach dsposal area for O&M materal ll be handled under the O&M program. All materal from the remander of the project (Entrance Channel Staton 45+ to end, Cut 1, Cut 2, Southern Turnng Basn, and reconfgured Settlng Basns) ould ether be placed n the Palm Beach Ocean Dredged Materal Dsposal Ste (ODMDS) or n the requred mtgaton stes for seagrass or hardbottom habtat. f, based on addtonal geotechncal nvestgatons, t s determned that beach qualty materal exsts n suffcent quantty and can be feasbly recovered from these areas of the project, then ths materal could be placed n the Beach or earshore Placement Areas rather than the ODMDS. Refer to Plates 19 and 2 for the Beach and earshore Placement Areas plan and typcal sectons, Plate 23 for the Palm Beach ODMDS ste plan, and Plates 21 and 22 for mtgaton ste locatons and conceptual plan and typcal sectons. Opportuntes for addtonal benefcal use of dredged materal exst n the project vcnty such as the fllng of anoxc deepater holes n the Lake Worth nlet Lagoon, creaton of hardbottom habtat, creaton of habtat for submerged aquatc vegetaton such as seagrasses and/or placement of beach qualty materal at the MdTon Beach Placement Area. t s not antcpated that the alternatve forms of dsposal of the dredged materal from ths project for purposes of benefcal use ll result n any cost savngs to the project; hoever, f cost ncreases are consdered small or f there s local nterest n payng for any cost dfference, these alternatves could be further developed and ncorporated nto the project. 19. Constructon Procedure. For cost estmatng purposes, t s antcpated that a mechancal dredge (barge mounted backhoe) and sco barges ould be used for constructon of the nner Harbor and Settlng Basn and a hydraulc cutter sucton dredge ould be utled to dredge the Entrance Channel here beach qualty materal exsts. Mechancal dredgng ould be utled for the portons of the project that nvolve dsposal at the ODMDS or mtgaton stes and the hydraulc dredge s utled here beach qualty materal exsts and dsposal occurs by pumpng materal drectly nto the nearshore placement area. Screenng of the materal beng placed nto the nearshore ll be requred n order to remove all rock fragments greater than approxmately 2 nches n dameter. A-6

12 E. RELOCATOS 2. General. The project sponsor ould be requred to assume the costs of all relocatons and alteratons. An nvestgaton nto possble utlty relocatons has been conducted and based on ts results there are no relocatons antcpated. There s an exstng ppelne under the Entrance Channel to servce the Sand Transfer Plant that s belo the depth of the proposed project as shon on Plate 5. F. OPERATO AD MATEACE 21. General. The Federal Government currently mantans the exstng project annually. The Federal Government ould be responsble for operaton and mantenance of the mprovements to the Federal avgaton project proposed n ths report upon completon of the constructon contract. The local sponsor, Port of Palm Beach, ould be responsble for the costs of the constructon and mantenance dredgng of the Port Slp 3. The Port of Palm Beach s also responsble for the costs of nfrastructure mprovement of the port facltes that are scheduled to be completed n advance of the authoraton of the Federal navgaton mprovements. 22. Estmated Annual Cost. Based on the hydrodynamc model results t s shon that the proposed project mprovements result n a relatvely small ncrease n mantenance volumes n the nner Channels and Entrance Channel. Hoever, th the mplementaton of the reconfgured Settlng Basn and Advance Mantenance features t s antcpated that the frequency of mantenance dredgng events can be decreased from an annual bass to a bannual bass. For the project lfe of 5 years ths optmaton ll result n an overall reducton of mantenance dredgng costs by reducng the fxed costs of dredge moblaton and the admnstraton of 24 rather 5 contracts. Snce the beach/nearshore dsposal area south of the nlet contnually erodes t provdes adequate capacty for regular mantenance materal and therefore t s not necessary to develop a long term management plan for the ne project that s any dfferent than hat s beng practced for the exstng project. Requrements nvolved th the usage of the exstng beach dsposal area and procurement of a proposed expanded beach dsposal area ll be handled under the O&M program as t currently s for ths project. Refer to the Soco Economc Appendx C for further detals regardng the estmated mantenance costs for the project. 23. avgaton Ads. The U.S. Coast Guard (USCG) ould be responsble for provdng and mantanng navgaton ads. Snce there ll only be a slght realgnment of the Entrance Channel centerlne (2 northerly shft), the Palm Beach Harbor Plots have requested that there be no relocaton of the Range Markers from ther current postons. The channel denng and turnng basn expanson ll necesstate the need to relocate certan buoys; hoever, ths relocaton s consdered mnor and ncdental by the USCG and therefore there ll be no cost to the project for ther physcal relocaton. A relatvely small amount of cost s dentfed n the MCACES estmate to cover mscellaneous admnstratve costs for coordnaton th the USCG durng and post constructon. A-7

13 G. QUATTES AD COST ESTMATES 24. Summary of Quanttes. A summary of the major constructon tems are presented n Table T 1 and detals of the areas to be dredged are provded n Tables T 2 and T 3 belo. 25. Summary of Costs. The estmates of frst cost for constructon of the ED Plan ere prepared usng MCACES softare and are presented n the Cost Appendx. The estmate ncludes a narratve, a summary cost, and a detaled cost shong quantty, unt cost, and the amount for contngences for each cost tem. The costs of the non constructon features of the project are also ncluded n the cost estmate. The costs have been prepared for an effectve date of Fscal Year 213 (FY13). H. SHP SMULATO STUDY 26. Dscusson. The prelmnary engneerng desgn for mprovements to deep draft navgaton features at Lake Worth nlet and Palm Beach Harbor as completed n May of 211. Optmaton and testng of the desgn as scheduled for the thrd quarter of that year. The Full Brdge, 36 degree Smulator at STAR Center, n Dana, Florda as selected for the smulaton ork, and testng by the Professonal Harbor Plots from the Port of Palm Beach. STAR Center as the preferred ste for the shp smulaton study, based on the fact that they mantan a valdated smulaton model of Palm Beach Harbor, that could be modfed to optme and test the ne engneerng desgn, n conformance th engneerng qualty requrements mandated by the Corps. The model had been developed earler, for a study conducted by the Port, of ther planned cruse termnal expanson and assocated deep draft facltes. A formal proposal to conduct the study at STAR Center as negotated at the Corps of Engneers n Jacksonvlle, n July of 211. Engneerng oversght for the ork at STAR Center as provded by Denns W. Webb, PE, Group Leader, Deep Draft avgaton Group, US Army Corps of Engneers, Engneerng Research and Development Center, Vcksburg, Msssspp, and, Phlp T. Sylvester, hydraulc engneer shp smulaton techncal expert from the Corps of Engneers, Jacksonvlle Dstrct. Valdaton of the Lake Worth nlet / Palm Beach Harbor smulaton model as accomplshed durng the frst day of smulatons that ere completed over the to eek perod, September 18 to October 2, 211. Valdaton s a test of the ater currents used n the model. t s a confrmaton of the channel layout and navgaton ad placement. Valdaton s a check of the maneuverablty and shp handlng characterstcs, n real tme, that each desgn vessel demonstrates, n the exact vsual space dsplayed by the smulator, as the engneerng desgn of the harbor, properly and correctly referenced and fxed, n the overall larger testng doman. The ater currents examned and verfed ere provded through hydrodynamc modelng of the harbor, by the Corps Coastal Hydraulcs group n Jacksonvlle. Valdaton s an essental component of the study, performed by the lcensed professonal harbor plots from Palm Beach Harbor, that certfes the usefulness and correctness of the smulaton model as an engneerng tool properly conceved and developed to optme and test the proposed engneerng desgn. STAR Center completed ther Fnal Report of Lake Worth Feasblty Study n December of 211. The report s a comprehensve dscusson of the smulator faclty, and the actvtes assocated th shp smulaton testng of the proposed engneerng desgn for Lake Worth nlet /Palm Beach Harbor. A-8

14 Smulaton testng matrx, smulaton scenaro track plots, and harbor plot post test run evaluatons are ncluded n t appendces. The report also ncludes observatons and recommendatons th regard to engneerng desgn n the context of navgaton usefulness, relevance, and safety. The Report s provded as Attachment B for reve and reference. The track plots and comment sheets from the Report are consdered to be propretary ntellectual nformaton by the Port of Palm Beach Plots. A copy of ths nformaton s held n confdence by ERDC and the Dstrct Offce (Phlp Sylvester ). 27. Optmaton. The Professonal Harbor Plots from Palm Beach Harbor have been on the engneerng study team from the very begnnng of desgn development for ther faclty. The Corps of Engneers n Jacksonvlle alays engages the local harbor plot group and cultvates a close professonal orkng partnershp th them, to learn ther ste, to understand ther problem, and formulate a possble soluton that ll mprove ther effcency and safety. Palm Beach Harbor Plots Assocaton has been an actve, cooperatve, and hghly valued member of the engneerng desgn team. Ther group has provded many hours of ork to develop and shape the engneerng desgn for ther faclty. Ths ork ncluded drect vsts of the Corps desgn team to the Plots offce to ork hand n hand on refnements of the channel n order to ensure that no mstakes or msunderstandngs could occur th the development of the fnal plan. They have provded a rtten statement of support for the desgn alternatve selected durng smulatons, and orked th the Jacksonvlle engneerng desgn team to terate that tested concept nto ts current, perfected, buldable form. Ther letter of support s ncluded n the Attachment B for reve and reference. 28. Agency Techncal Reve. The control of qualty s an essental component of the engneerng msson at the Jacksonvlle Dstrct. The shp smulaton study conducted at STAR Center ts concept, development, executon, oversght, and conclusons has been successfully examned for qualty and correctness, thn the formal frameork of Agency Techncal Reve. All comments have been evaluated, addressed, and back checked to the satsfacton of the assgned reve team. A copy of the ATR comment report has been added to Attachment B. A-9

15 Fgure F 1. Projected Future Sea Level Rse at Palm Beach Harbor 3. Regonal Sea Level Change vs Year Palm Beach Harbor, Palm Beach County, Florda 2.5 Regonal Sea Level Change (ft) Baselne ntermedate Hgh Year F - 1

16 Table T-1 Summary of Constructon Quanttes for Recommended Plan tem Dredgng Volumes (Federal) Entrance Channel Entrance Channel nner Harbor nner Harbor Advance Mantenance Advance Mantenance Settlng Basn orth Jetty Stablaton PZC26 Sheet Ple Seagrass Mtgaton Constructon Dredge, Transport and Place Fll Dredge, Transport and Place Select Fll Hardbottom Mtgaton Constructon Provde and place lmestone boulders Quantty 285,44 cubc yards 145,767 cubc yards 897,639 cubc yards 125,44 cubc yards 173,5 cubc yards 12, cubc yards 258, cubc yards 2 LF, ple length = 63 feet 88,315 cubc yards* 37,125 cubc yards* 25, cubc yards otes Dsposal n nearshore Dsposal n ODMDS Dsposal n ODMDS Dsposal n Seagrass Mtgaton Area Dsposal n nearshore Dsposal n ODMDS Dsposal n ODMDS Place n Ste S- Place n Ste S- Place n Ste H-3 *t s antcpated that approxmately 125,44 cy of materal from the nner Harbor ll be used n the constructon of the Seagrass Mtgaton Area rather than be dsposed n the ODMDS. T-1

17 Table T 2 Summary of Dredge Areas and Haul Dstances Dredge Area Surface Area (sqft) Dstance to earshore (ft) Dstance to ODMDS (ft) /A /A /A /A /A AMA AMC AMA AMC AMA /8AMB AMB SB SB SB T 2

18 Table T 3 Summary of Dredgng Volumes for Recommended Plan Project Depth = 39 feet (Volumes nclude 2 feet requred overdepth plus 1 foot alloable overdepth) Supports unrestrcted vessel movement at draft = 36 feet (3 feet Underkeel Clearance for nner Harbor and 5 feet Underkeel Clearance for Entrance Channel) Channel Area Depth AMA 4AMC 5 5AMA 5AMC 6 6AMA 7 8 8AMB AMB Volume (cy) earshore ODMDS TOTALS Settlng Basn Area SB1 SB2 SB TOTALS T 3

19 GEORGA TALLAHASSEE... -_-_-_ PEAUT SLAD _ -.,. ' / ---- ESTG PROJECT "" Vl >-6 ::. < Do (/)a:: a.o 1-o::...J o" LL U.. t-...j - S:2 > o:: >-o!!!vl """'D>< - u ::: <( <:-'"""> o..d oo Vl ><..., 1-'--.:::;...: 5 "' e; "' ;g ATZ.ATC OCEA GULF OF MECO CAAVERAL ESTG AVGATO PROJECT. -- AVGATO PROJECT EPASO GRAPHC SCALE LOCATO MAP.T.S. KEY WES;.,.../ 8' 8' VCTY MAP PLATE 1

20 -- Vl a:: "' >-6 :::;; c( Do WVlr o..o - a:: --' o" u._u... t-_j - > a:: >-o!!lvl """O"' u 8-2 4' CREASE - o:::< <--'.., a.d -t oo Vl "'.., 'G-- ZJ RECOMMEDED PROJECT EPASO FEATURES: A-1 SOUTH ETRACE CHAEL WDEER <APPROACH FLARE> B-2 CHAEL WDEG <4' OR 6' ) O ORTH SDE ETRACE CHAEL C 15' CHAEL WDEG O ORTH SDE OF CUT-1 PLUS TAPERED WDEG OF CUT-2 RESULTG 45' MMUM ER CHAELS WDTH D APPROMATE 15' ORTHERLY WDEG OF SOUTHER <MA> TURG BAS G 15' SOUTHERLY WDEG OF SOUTHER <MA> TURG BAS ;; 8 "' " >. "",o: " ""'. u "' LEGED: ESTG AVGATO PROJECT AVGA r O PROJECT EPASO « ;-::: 8' GRAPHC SCALE PLATE 2

21 Y= 888 Y= 8875 RGE. -4 RGEO '"". Jnn RG""'...,..a-!!!! fl) fl) "LT-2" fl) 53.1 ) « _ ; : '- 5 U 5a tu # f !U.5. :; ::: : 1! t! 1! # <t U:J (J.T = « U.f j 5f, 52: : f.5 8 ;; : g 5U : = : ::::! A1...a U.6-1 o '"" ""' r-..ll.fl "":!:r; "715 - ""'flf!8 - "!!lu -.,J/U -12.., _ U /r 5.1/ c pc 4D JJ' g :: f.6 4U 4f ff f) ".f.7 41j.U.-1 ' l "" 41.8 # o " U lll j # lb # :Z: U L # r # J:1.!! 7 # l # ts 4D. R.o :: stll :!: 49.5 : : 5.9 s.4 4 jl u.8 8 : 6 a r.o 5.o so.o J M.s 55.( :_ (, 5 g 5. 3 : -All 5.2 ll tu $ o U " B ':;; "; 51U U 5.T 5f RGE 2 1- r 41o.no , 5.11 su f.O c.: --.,_-.,.-- -;n,-- -4tt>f---::T ", , sr.o---5ln-- -5D:T-- f/j ( ;---:: sf.-----"""! , a,; f4! f /JA :.1. 3 : :: m / !fJ.2 ;! t sz4! ';lo ::.U.T 61 o 82.7 :-: / ':: lff U.O 47.4 : B2A = 1 ::: 5 o 52.9 : :: : ;; j. :: :r.: : 7 :! :: =: : :; : ru , : : ARES :; --= MO... [;, # P '! :: : 7 RGE : " Y=887 : :; : j!! : :; f. 4;.5 '.26 Bg ; -66 ' ,_ ;:; !U.J 52 sr.2 ll M 52.2!U.S !U.S ' !U # !U !fJ f # # ,.a.o , lV 5# ".2 5lf.T tP tu.5 M r- - e- r- - 5 RGE o !U #.2 5# = ru :; : 5# !fJ # ! :!U.S :u 63.8 :!U.B 56. :.:! m!! u = ;; :: :: S! ; ru!! : ;;; 57" : MO %% # #.7 : :: 55.$L 56.2 :; :; 3.2_ '- m! : :! 7 : :: #.11 :! :: '.2 5# T !U = 57. 1!U.r : ll T : ETRACE CHAEL fl) = ll " 57.1J 51J.o lf / f 57.7 lf :; =! :.: tu.r :: : : :; = lf "" tu # M ff J. ;3 MO 54 BtU # ;! ""!'!lo &3 - """"' - ""S1: :;_: !Z lll c : :: 56.B :. 5# m = 56.! #.8 : !U BtU!U.8 = :j :! g :: :: :: =- :: :: :. :: ; = = b ==!J :;; 55.2 = 57. = = 55.4 :; :: = MAP SHEETOTES: REFER TO SURVEY O ELEVATOSAREFEETADTETHSADREFERTOMEALOWERLOWWATER(MLLW)TDAL :: DATUM. 3.ALLELEVATOSAREBELOWTHECHARTDATUMULESSPRECEEDEDBYA(+)SG. :. f 4.PLAECOORDATESAREBASEDOTHETRASVERSEMERCA.TORPROJECTOFORTHE 57. EASTZOE OFFLORDA AD REFERECED TO THE ORTH AMERCA DATUM OF 1983 (AD 83) THSSURVEYWASPERFORMEDUSGREAL-TMEKJEMATC(RTK)GPSPOSffOGWTH THE FOLLOWG REFERECE BASE LOCATO: REFERECE BASELOCATEDAT"WWLFE" (OPUS PD# BBBZ4{J) TDE STAFF LOCA. TED FROM "A 3" (PD# AD287) RGE.O RG t ị... tj. DEPTHS DEPCTED BY THS SURVEYAREREFERECED TO MLLW, TDAL EPOCH , AS REPORTED BYTHE ATOAL OCEAC AD ATMOSPHERC ADMSTRATO (OAA). OM'S VDATUM MODEL WAS USED AD CA.LBRATED TO THE PUBLSHED MLLW HEGHTS OF THE BEACH MARKS ASSOCATED WTH THE TDE GAGE STE SPECFED BELOW: ADS TO AVGATO PLAE COORDATES LT. BUOY-2 (4/12) y OAA TDAL STATO , PORT OF W. PALMBEACH, LAKE WORTH 7. VERTCAL MEASUREMETS WERE MADE USG A ROSS SMART SOUDER MODEL 835 WTH A SGLEBEAM TRASDUCER OPERATG AT 28 AD2kH. SOUDGS SHOW AREHGH FREQUECY. SURVEYVESSEL DATE OF SURVEY CUT Y= 8865 ESTG AVGATO PROJECT AVGATO PROJECT EPASO OTE: STATO AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT COTROL. GRAPHC SCALE 2' 2' SB APR212 ET CH, CUT-1, CUT-2, TURG BAS 8. THE FDRMA TO DEPCTED O THS MAP REPRESETS THE RESULTS OF SURVEYS MADE O THEDATES DCATED ABOVEAD CA OLYBECOSDERED AS DCA.TG THE GEERAL CODffOSAT THAT TME. THS CHARTS SOLELYFOR THE DSTRBUTO OFAVALABLE DEPTHS ATTHE TME OFSURVEY. 9. SURVEY ACCURACY STADARDS, QUAL/7Y COTROL, AD QUALTY ASSURACE REQUREMETS WERE FOLLOWED DURG THS SURVEY ACCORDACE WTH USACE EM , HYDROGRAPHC SURVEYG, 1 JA 2. PLATE 3

22 APPROMATE SHORELE 8 8 <D... "'... 8 Y=888 Y=8875 RGE. -13 RGE. -6 RGE.O RG 2 RGE. 4 Ll 5 a. Ll :::: :: u =11 ORTH JETTY 2' SHEETPLE WALL 8 + ( '"' = '"' rn Ll 5 a. Ll :::: :: u =11 RGE. -4 RGE.O RG.2 RGE. 4 c)! Vl a:: > ;;:; (!) :::=; r:1: "-< Co :r: VlE a::-' o" Lo.. u..;, t-_. 1 > a:: >-a :::=;!!!VJ Ole 1 r:1: --'..., a... Vl lc..., ;; a: ;.!..ao. "' k e; " l 1; "' ;; :o cu CC> "' CC>."' 8 Y=887 Y=8865 ESTG AVGATO PROJECT AVGATO PROJECT EPASO OTE: STATO AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT COTROL. ETRACE CHAEL 35..f :S-.f T.(J 3T.S T.1 M..f JT.1 3U WDEER POT OF FLECTO 2tJ(1 :u.s :U GRAPHC SCALE t u 2' ẉ.., [La:: o -' "- S2gsZ >CD <: <C!r_J Za... t;jo -'UUJ Z<CZ - C!l 1 Q::::::; -' _J... :: a (.)Z...,.a._ o!a: (!) a::: t-e... o3 c: U).>..,( l-t V) en 1 ::::; off l")u._ 1 ""' Vl PLATE 4

23 Y= APPROMATE SHORELE SAD lrasfer PLAT PPELE CROSSG TOP OF PPE: -52 FEET MLLW OR DEEPER UDER EW PROJECT CHAEL LMTS --- (REFER TO DEP PERMT JC AD DA PERMT 374) ORTH REVETMET ORTH JETTY Y= 888 RGE. -6 RGE.O Y=8875 RG.2 RGE4..,)!.._ "' lj.,.. "'! e:. " "' ;; cu.! ""' a! "' E.... ' 1 :::;) (.) P.l STA. 61H1.46 ETRACE CHAEL P.l STA. 61-HfASCUT-1 Y= 887 ADS TO AVGATO LT. BUOY (4112) PLAE COORDATES y 971S47.&:! 11878C4.94 LT. BUOY-S (4112) 971l ESTG AVGATO PROJECT AVGATO PROJECT EPASO LT. BUOY (4112) LT. BUOY-7 (4/12) FO SG O.1 (4112) FO SG O.2 (4112) OTE: STATO AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT COTROL. ----APPROMATE SHORELE GRAPHC SCALE 2' 2' PLATE 5

24 P.l. STA. 87<# CUT-2 P.l. STA. (}#(J(J TURG BAS!J to.j STA. TT CUT-f RGE. -f5 CUT-f o P.l. STA. 1' CUT f P.l. STA. 1' CUT l-l ! ! J f ff f.8.-1 f ff.o.1 11J ff flu Q RGE. -15 Q +CD RGE.!L CD = ctj RGE. 1ft RGE 15 RGE. 3.. c)!.._ "' lj.,.. "'! e:. (/) ;; cu.! a! E. "'... ESTG AVGATO PROJECT AVGATO PROJECT EPASO "DB-2" 1 ADS TO AVGATO DB- 2 (4112) LT.- 8 (4112) LT.- 9 (4112) LT. - (41'12) LT.- 11 (4/12) PLAE COORDATES y GRAPHC SCALE 1- ',... :::l C u (.)..., U) a_ < ll::o "! D..2 (.!) o 1. -' ;:::... 2 < - " Qg;Z >OJ <: "" (3 <CQ:...J 1- o.. Vl CJ ' -'ullj t- > < :::J OJ ', U1 a::::; :::l (.) O;; > ;:D.. ::::;. ff..j U) "" 1 Vl ẉ.. OTE: STATO AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT COTROL. 2' 2' PLATE 6

25 Y=8875 Y= 8885 Y= 1181 PORT SLP APPROMATE SHORELE f f-«5 1-« T f8.1 17:1 "1.9 f ft..# 16.f « T !1.7 flu.f 2tJ g_/ * = T ZJ ; T !1.2 27:7 2!1.9 27: B.1 27: :9 27:9 27: B.3 2T.9 2B.8 27: ZT.f 26.( T.O !1.1 27: J PORT OF PALM BEACH f-« (2 f.(() f.(.# f M !H.2 2« T.f (1.! :4 27: fl tU ! :r !! 2fl ! Sl6 rtf_ ,U.g 35.9.u&.. --J :3 :!; : (3 3/U..., ;U.o /U :H.J 38.T 11! Q.O.f APPROMATE SHORELE [3!,!.j ESTG AVGATO PROJECT AVGATO PROJECT EPASO -1().3.((}.f T.O 38.() :U :1 :17: T.T fl9-1() f ll f ff f-«3 ff !1 Mol 2-«2 2-« ft.() f Mol 26.3.H : T !1 27: T.8 l f ! ! ( :'15.o ' :U.! T.1 3.( ST..# !U tl 37:7' 33.8 :U #.3 3# # :U.6 M.T 33.!1 39.5!U U.6.flU T () t T.1 3fU T.3 3T.O no 3! : :4!lfU 3fl8 3T.O ( ( T.T ! ! !1 3(1.5! » (1 # f 37: : f OTE: STATO AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT COTROL v l'.f 1() l u « « ' f.J U.5--r = 32.8 S!.J.U ( ( 1.U U tU : T T.! ST.8 37: !1. 3! !1.5 3! ! M.t t T.f : Mf ( ! () #().f tU 39.( oll t !1 37: R-4».8.fl R ! () =.;, 1.7' T f.O # :3 37.7» » J ! tU !1».4 3T. 37:7».3».2 37:7 3.1 $ 2! () :5 37: » (1.()» ot ».o 3T.T 37:3 3T.3 37:4 37:4 3T.<# 3T T.O !/(1.7 f :.Z ( :H :(1 37:7 37: !T T.4 37: :8 3T.T 37' ! ! tl.f T.O ! !U.8 35.( !1 3T.3 3T.! 37:8 3T : :1T :: : :1 3T.f PLAE COORDATES ADS TO AVGATO y LT.- 12 (4112) FO SG (4112) PEAUT SLAD 8.3 ff f :U # :H.O 3#.3!U.3 3.(8 3# f ( T.fl 38. R » J :.b (1 37.T 39.f 38. M8 3!1.1 ot 38.2» » T f/).3.o u.y (3 :H T : ! MATCHLE PLATE O. 8 SOUTHER TURG BAS 3./f -«T T.5! ! f.T 2!1.8 3f ,.,.!U ! PJ. STA JCUT..2 P.l STA. fj+(jo Tl/RG BAS fU ().() 4.4 -U.((}.3.((} : ! ((}.8.((}.7.((} ! fl JT.f <lfl(l 4()_( ().().fO.O ! ' ! T ().7.((} f /.T (1 4()_() 38.8.ftlf 11! Ml ST T :U.8-1().() #O.t -.3.((}.() : #.5 :H.({ «1!1. GRAPHC SCALE 2' 2'.. c)! " ""'. E....._.,._ "'! a cu "' "' lj e:. (/) ;;.!! Vl t- C u aj..., a. < (.!) ll::o a.2 (.!) o a: --' :::;) ;:::"- 2 1 < - c.:lz :;;g<l: <a:: a: (3-1&.1 <O.. J: 1 c:::;) ' --'UL&. > Vl :::J al t- - c U1 a::::; O;; > - 3:a. ::::; a: ff 1&.1 J: --' 1... a: PLATE 7

26

27 + r--... RGE. -8 v <( - _BGE.:..._:-5 j 8ETTLG <( A ' r _RG_E._OO ADVACE MATEACE ZOE = 4 FEET r RGE. 2 <STATO 3+ TO STATO 4 7+; RAGE TO RAGE 4) <Currently Mantaned Depth = 39 1 Requred Alloable Overdepth) + ") <(, , 8ETTLG A6/ 1 o :n, BGE3Q ETE nnvtj A6/ L BGE Currently Mantaned Depths Settlng Basn - 35' Requred + Extended Settlng Basn - 35' Requred + Expanded Settlng Basn = 35' Requred + + ") <( 2' Alloable 2' Alloable 2' Alloable L.._RG_E._4 _ ETRACECHAEL GRAPHC SCALE 2" 2".. 1.:: "!:! "' >.! DQ. "' ; e; f!' en! :- 'u c<j j ocn "' 9!.!....! 1- u..., " []_ <( D:::o...!k []_:: ll " o O..J ;::u.. :: <( -... e,d::: _Q >CD 13 <e::: Z<C W :a:..ju 2 > Z<( - lj :::J CD 1 1- Vl e::::::; > O<t!! > 1 s:[]_... u ::::; _J... a u._ a.....!! )(... PLATE 9

28 l{) ['. L() '> C) ['. f'l) 1' 1' 1' RGE. -8 <( <( <( <( (f) (f) (/) (/) PROPOSED PROJECT SETTLG BAS DEPTHS AREA SBl = 51' Requ1red + 1' Alloable Overdepth AREA SB2 = 34' RsqUlred + 1' Alloable Overdepth AREA SB3 = 26' Requred + 1' Alloable Overdepth AREA SB3 RGE. -6 RGE ' '<:j <( (/) RGE RGE PROPOSED ED PLA PLUS ADVACE MATEACE DEPTHS ZOE A ZOE B ZOE C OTE:STATO + '<:j '<:j <( (/) = 51' Requred + 1' Alloable Overdepth = 4 7' Requred + 1' Alloable Over depth = 51' Requred + 1' Alloable Overdepth L RGE. -35 RGE. -13 (/) m (f) AREA SB1 <( LD ['. + ()) (Y). <[ <[ 1 + (f).. : <(! SHEETPLE WALL=:J u co & ==========-,---L L (/)--R G. 4 AMZ:c RGE..._ O.Q _ 8 Feet RGE. 125 '-----! r LO AM-=-a- -=- -4-Fee f --- e; --- '<:j- n <( <( - (/) (/) AD RAGE VALUES ARE RELATVE TO THE ESTG PROJECT CHAEL AQC jv1_!1.1 E_!.C_E_ OE A <AMZ-A) 8 feet <S to. 3+ to Sta. 39+; Full Channe W d th) -- ETCECHA:M::E:Z L_ E j - - Ị -' D.. ll,... C) '5 u r GRAPHC SCALE 2' 2' "..,... o_...:... O:::o... D._- ll ::: (C) o a --' ;::u.. :: < -... (.C)o::: - >CD 13 <o:::... <... f-- :: ' -- W :: -'U > Z<... - ::::l CD f-- f- Vl > ::::::!' O<! > f-.,... _J 3:o_ ' :::; D u._ D.. ạ.. ll D.. t: D.. PLATE lzj

29 MATCHLE PLATE STA. 53+ t :1: 61 t Cll c '--.../ fh m fh t c m Cll 5 "" r m "ll < - t ::... -r... STA. 4()+ ETRACE CHAEL......,..., «! STA. 45+{) ETRACE CHAEL SDE SLOPE 1V : 3H SB2 c.. m < ; ftl -1 D ftl m... < Cl... (f) ftl f/) Cl -- D :::! Cl > D --u < JJ... C) (j) c... D m ftl r n c -- m f/) ftl > """' :tj JJ m --u :tj m D c... ftl (f)... n < -- m d -1 :: m m (j)..... m -1 r... -,..., - 34«l... SlOE SLOPE 1V : 3H 31+CD fh 29> fh m 2&+ T < moo T :: "'.. 1 2SKO..., t t»tto..., r f 21-tQO !,...,. "" a l G> :: en,... Cll fh m < :: "',... f 1Mo t '"'"' t,,..., t t -r --r,... r : DO 1 Ml T 2«T -1«_J P! - PALM Plo1 Fle namel onqned bys Scale; LAKE WORTH LET AVGATO PROJECT, SRC Plot dote fp,r,lfl BEACH HARBOR, FLORDA r On by' Ckd by' ocolo DEPARTMET OF THE ARMY SDE SLOPE PLA erarence th-.; SRC 12 LRP JACKSOVLLE DSTRCT, CORPS OF EGEERS US Army Corps... AD TYPCAL DREDGG SECTOS Dotod S[PT[jBER 212 JACKSOVLLE, FLORDA of Engneers FEASBLTY STUDY - EGEERG APPED Jocksonvle Dstrct

30 ml'll mrr-o ;Jl :c::,..._ r rn D,. <,. (f) C),. --1 D!"': --1 CJ,. C) D """'() <,. > JJ C) c... D $! rn --1,. n G') m --1 rn """'() c JJ m """'() CJ D > c... ;;o m rn (f) ;;o n,, m --- < m -1-1 :: m C :::! G') "'tj c.. m (') -1 ;;o r Q 6;!/! J!!O ; "'" r:"' ::er rn C) rn l G> :: en SDE SLOPE,. 1V: 1H - T, tOO tj -- ' rt 17< T t!! [t ::.: ' ' ' ' ' ' ' ' ' ' " <> "L. ' ',..., [t :(,... 1,...,... t,...,...,.,... rt... rt... r r 7... rr... l """'T,...oo T 1/. lo1... ' o1""' / ::.:. /. _,.6' """' ',...,. 1...,. 1'!..,. / / ) 1oP' 1oP' 1.,.<!1 1""" 1'""' fl>"''',...,...., ', """" ' fo"''' ' ' t:. 1'.,+ T '...a) '..., l... + '...,.,..., , '! P MATCHLE PLATE 11 STA LAKE WORTH LET AVGATO PROJECT PALM BEACH HARBOR, FLORDA SDE SLOPE PLA AD TYPCAL DREDGG SECTOS FEASBLTY STUDY - EGEERG APPED erarence Fle namel th-.; onqned bys Scale; SRC Plot dote On by' Ckd by' Plot ocolo' SRC 12 LRP Dotod' S[PT[jBER 2t2 DEPARTMET OF THE ARMY JACKSOVLLE DSTRCT, CORPS OF EGEERS JACKSOVLLE, FLORDA fp,r,lfl US Army Corps of Engneers Jocksonvle Dstrct

31 PROPOSED PROJECT CHAEL RAGE(FT) ESTG PROJECT CHAEL : ' ' ' l j : ' ' :! : t: 3 : ', J, r------, ' !E!5 4,_ ! = J L J r E!s'G-PROJ-Ecr"oE"Pl-:s ' ' ED PROJECT DEPll 41' 5 t t - t-=--=t - j t 1 1 j j 6,, ESTG BOTTOM 1 ' ' ' ' ' RAGE(FT) CROSS SECTO HORZ = SCALE: A VERT= SCALE: B STA.15+ O DREDGG REQURED E. " "' PROPOSED PROJECT WDEER PROPOSED PROJECT CHAEL ESTG PROJECT CHAEL... :1!...!E = :::::/, :::::::[:::::::]::::::: sr<prcue"cfoepn35 1. _'- ED PROJECT DEPll 41':-:: -:-' ! ! ! J------::=::E J---- r J _:_ J _:_ J _:_ J RAGE(FT) ooo CROSS SECTO HORZ SCALE: A VERT SCALE: B STA :1!...!E =... RAGE(FT) GRAPHC SCALES - u ẉ..., D< :C Ul (l_ a: 8 DD ---',.._ u < Ul oa: -o >CO t:l <: Z< a c - W a: JL) c Z< - J co <([ u 1-::.: a:, : D< > 3:a_ - 5 a_ (.!) (3 >- Cl :::J U1 > ::::; ff >l < J ẉ._ "A" "B" 2' 2' 4' 4' PLATE 13

32 PROPOSED AMZ-A DEPTH 49'... ::E t:!!!!: j::::.. RAGE(FT) :::E : : :S:T; ': ::G: AD : :v:a : :c:.::ed ::::: : PROPOSED PROJECT WDEER PROPOSED PROJECT CHAEL ESTG PROJECT CHAEL ::>J - : :::: l::::: :::;:::::::: :::::::;:::::::F:::T:::::: t , ESTG SETLG BAS ----J L ' ' ' ' ' -...,; STG SELG PROPOSED SETTLG BAS 1 (SB1) ESTG EPADED SETTLG BAS J L J _..,& :--- --:=-= - --='=- r : MAf'rEACE-DE-PTff3r , E!STG PROJECT DEPTH.35'!'!AS DEPTH 35' --- ESTG EPADED SETLG BAS DEPTH 33'---,1_ ' - j_----- ' 3 ' -+ ' ' ' - --_ ED PROJECT DEPTH 41'_- -' :. - :-J : , t t T , AMZ-ACOTRACT REQURED DEPTH 51' ' ', ; L S_1 q_q_'{j.cjf!c!l!,.pej'j!::f_w _ ' ' -< --- = f f f f RAGE (FT) CROSS SECTO HORZ = SCALE: A VERT= SCALE: B PROPOSED AMZ-A DEPTH 49' STA.35+..,)!.._ "' lj.,.. "'! e:. " H "' ;; cu.! ""' a!. "' E " PROPOSED PROPOSED PROJECT CHAEL PROPOSED SETTLG BAS 2 (882)... ::E...!!!!: j::::.. RAGE(FT) PROJECT WDEER :::::::::::::::::::::f -:::::::: ESTG PROJECT CHAEL ;:::::::: :::::::;:::::::r::::::::[::::::: ! f t ESTG ADVACED : :, MAf'rEACE-DE-Pnf3r , E!STG PROJECT DEPTH.35' ED PROJECT DEPTH 41',.:'::-':":" :-!" ; ' - : _=-_,-:..:_- ' --'...L ESTG SETTLG BAS DEPTH 35' :::;;?:--: : ;:::::;:::::::: :::::::;:::::::;::::::::r:j:;:::::::;::::::: - { SB2 cjtract mjqured DJ..rH 34' V- - --t RDEPTH- t f T 1' ALLrABLE4 ---,:J AMZ-ACTRACTREQUREDDEPTH51' : ' t ' ' ' ; ! _; ! _; ! _; l j l j ---_j l j l j (OO -7 -«-9 - CROSS SECTO HORZ = SCALE: A VERT= SCALE: B STA ::E...!!!!: j::::.. RAGE (FT) GRAPHC SCALES - u ẉ..., D< :C Ul (l_ a: 8 DD... --' u < Ul oa: -o >CO t:l <: Z< a c - W a: _JL) c Z< - _J co <([ u 1-::.: a:_j : D< > 3:a_ >l < _J 5 a_ (.!) (3 >- Cl :::J U1 > ::::; ff ẉ._ "A" "B" 2' 2' 4' 4' PLATE 14

33 ; <::>.., PROPOSED PROPOSED PROJECT CHAEL PROPOSED SETTLG BAS 3 (SB3)... 2 ::E t: 3!!!!: 4 j:::: PROJECT WDEER ESTG PROJECT CHAEL f PR=:-Z-C ' DEPTH49' !":.' ---- ' f:- :;:"" 7::"" ::-: l-:-:: -:-: _J'::" :-: r--- -:.rf<; f""" / ;-::---f----aa -- -!;;.;-oool-oew,l,ml _, : H_:W_ t-- -- _:_ E>JsnG"PR.alE;cl- ":F>TH ,- sheetplewall (EL. +3..TOcl') ,, :: :;;::;;:;::::-::; -,:-:: :::::: :: ::;,: :::. :;:L:-= :::::::l:::::::]::::::: ::: ;::: :::::: ::: - - : j_ lj----- j _ _l_----:_ j_ _,_ _,_----- ESTG BOTTOM' ' ' ' 7 RAGE(FT) RAGE (FT) CROSS SECTO HORZ = SCALE: A VERT= SCALE: B STA _ "' lj.,.. c)! "'! e:. " H "' ;; cu.! ""' a! "' E.... RAGE(FT) PROPOSED PROPOSED PROJECT CHAEL -::;:: PROJECT WDEER ESTG PROJECT CHAEL -,:;:::::::;::::::::f::::::: l 2 o, t" :?-- - : >RosE.oAAEtAM-8 o:rfn4s; -- - "/ t" : : ; 3, E"sTGJ..Ov/..co ---- " t ---- "E"xlsfucP"ROJE.rol:l>rt ;,: =::::::;::::::l -:::;::: :::::::;::::::::r ::::;::::::: :.1 j 4 ;- - ': _ l.j',... EDPROJECTDEPTH41' ; j:::: AREA AMZ-6 COTRACT REQ'D DEPTH 4;.== j / COTRACT REQURED DEPTH. 43' 5 1' ALLOWABLEOVERDEPTH -- -, --- T r------:.; ' ALLOWABLE OVERDEPTH ; 6, f Esrb;onolJ f f f ; 7 j _ BOO CROSS SECTO HORZ = SCALE: A VERT = SCALE: B STA.42+ -ooo ::E......!!!!: j::::.. RAGE(FT) GRAPHC SCALES - u ẉ..., D< :C Ul (l_ a: 8 DD _J,_.._ u < Ul oa: o >CO t:l <: Z< a c - W a: _JL) c Z< _J co -([ u 1-::.: a:_j : D< > 3:a_ - >l < 5 a_ (.!) (3 >- Cl :::J U1 > ::::; ff ẉ. J "A" "B" 2' 2' 4' 4' PLATE 15

34 PROPOSED PROJECT CHAEL ESTG PROJECT CHAEL... : t::!!!!: j::::... RAGE(FT), " PROPOSEDAREA AMZ-B ' DEPTH 45' ' ' ' l : : ; l )_ , _,_ _1 _------! ', -., ;-- ESTG ADVACED MAT ACE DEPrn 39' '..._ T , AREA AM-B COTRAcT REC'D.DEPTH 4T : J ' ' ' ' ' ' : : : j Ex:JG -PROJETDEPTH ",.ED PROJECT DEPTH 41' - COTRACT REQURED DEPTH. 43' ; ; r ' ALLOWABLE OVERDEPTH , - 1 L f-'c_ -E<a aonm l : t::!!!!: j::::... RAGE(FT) CROSS SECTO STA. 48+ HORZ = SCALE: A VERT = SCALE: B E.... "' PROPOSED PROJECT CHAEL ESTG PROJECT CHAEL ; !l r j t l 1 J : 1:,, : 1 ' ' l : : :----, ,L f f- ' ' 3 : t , ' ' ' : : : 2 ' ' ' ----Ex:lsfG P"Rl='TDEPTH j 4 ; L _,..... _ - '-,.EDPROJECTDEPTH41' ; L j_ L- -f -J_ L J_ --- _L-- ::::==ET ut f ESr-GsonolJ f f j _ RAGE(FT) CROSS SECTO HORZ SCALE: A VERT SCALE: B STA.51+ RAGE(FT) GRAPHC SCALES - u ẉ..., D< :C Ul (l_ a: 8 DD...,_.._ -' u < Ul oa: o C) >CO <: Z< 3 c - W a: _JL) c Z< _J co ([ u 1-::.: a:_j a: D< > 3:a_... >l < 5 a_ (.!) (3 >- Cl :::J U1 > ::::; ff ẉ. J "A" "B" 2' 2' 4' 4' PLATE 16

35 PROPOSED PROJECT CHAEL... ::E t:!!!!: j:::: : : [ : : : ' ' ' : :--- : - ' ' ' ' ' ' ESTG PROJECT CHAEL : : ', - 1 Jt t t j l L ', g;;--- g;;;g;;g;- -:' :=: - ::; -- - ::-:::-:cdr;rato':eo 39 -EP-TH / ESTooG PROJECT DEPTH 33' r : --. 1' ALLWABLE OVEPTH _ _l_ _l_ j_ _l_ j_ _l_ j_ ::E 3 t: 4!!!!: j:::: RAGE(FT) RAGE(FT) CROSS SECTO HORZ = SCALE: A VERT = SCALE: B STA c)! " ""' E......_.,.. "'! H cu a "' "' lj e:. "' ;;.!! PROPOSED SOUTHER TURG BAS... ::E 1.!!!!: j::::.. RAGE(FT) ESTG SOUTHER TURG BAS :: ::: : r:: : ::: : _. : : : :;:::::::;::::::::f:::::::;:::::::;::::::::f:::::::;:::::::;::::::::f:::::::;:::::::;::::::::f:::::::;:::::::;::::::::f:::: ::l ::: ;: :: r :"l , ! : r ! : r ( r ! : r ! : t ! ' ' : --- ' --., r t , r T-- - ESTG PROJECT DEPTH 33' T , r T , r r , :e _-j ; ::f:::::::;:::::::;::::::::f:::::: : r : r ESTG PROJECT DEPTH 33' ! ; {';]-'------_A_----- ' :-'--:-:-:: ' '_ ' ----::-:-' ::-_--- :-:-_- :-:'-:-_-:-:-_- '::-_- ::-_- '::-:-_- ::-_' ::-:-_---- : , ::=.:::,';;',,;rn,,,-, jtjtjtjtjt j ::: t CROSS SECTO HORZ = SCALE: A VERT = SCALE: B STA.B+OO GRAPHC SCALES... 2 ::E 1. 3!!!!: 4 j:::: RAGE(FT) - u 5 ẉ.., a. D< a:o Ul a. (.!) a: 9 DD... --' (.J... < Ul oa: -o >CO Cl (3 <: Z< a c - W a:...ju c > Z< Cl -...J :::J co -([... u U1 1-::.: a:...j : > D< >- 3:a. - ::::; ff >l <...J ẉ.. "A" "B" 2or/ 2or/ 4' 4' PLATE 17

36 PROPOSED SOUTHER 1JRG BAS ESTG SOUTHER TURG BAS ESTG ORTH TURG BAS... :1! t:: :!!: j::::..j : :::::::::::j::::j'5:: ;:::;:::::::: : ::::: : ::::::::::::::::::: Z::: : :::::::: : ::::::: : ::::::: : :::::::: : :::::::::::: _ ::: :,: ::::::::::::::::::::::::: l j l j L l j L l j L l j L l j L l j L l j 6 6 J RAGE(FT) RAGE(FT) (; CROSS SECTO HORZ =SCALE: A VERT= SCALE: B STA :1! t:: :!!: j::::..j E.... "' - u ẉ..., D< :C Ul (l_ a: 8 DD ' u < Ul oa: -o >CO t:l <: Z< a c - W a: _JL) c Z< - _J co <([ u 1-::.: a:_j : D< > 5 a_ (.!) (3 >- Cl :::J U1 > 3:a_ ::::; ff >l < _J ẉ._ GRAPHC SCALES "A" "B" 2' 2' 4' 4' PLATE 18

37 ::t.. "' tr, L co (") b c :: , - J )> ll ""' ;;c ""' ""' ""' ::: C/) C5 m 1J ""' m C/) ;...;:: >< )> r )> ;;c m )> ""' ""' 1J co C2 m C5 ""'(JC/) :::! cn )>G) r )> ;;c () ::1: o m :E ""'! 1' ::t.. ""'!... C) a C).s: "'...,. r... 1"'1 LAKE WORTH LET AVGATO PROJECT PALM BEACH HARBOR,FLORDA BEACH/EARSHORE DSPOSAL PLA FEASBLTY STUDY - EGEERG APPED Doted; SEPTEMBER 212 DEPARTMET OF THE ARMY JACKSOVLLE DSTRCT, CORPS OF EGEERS JACKSOVLLE, FLORDA US Army Corps of Engneers Jacksonvlle Ds

38 T , r , r t , r t , r t ' 4' +2 + c o ;!!; = :-() -f f f : : '-: -"' -}: - W y, ' --= -- -: : :-----.: ' 1. J 1 : : - _!_ '"-'f-j :- --, !:::: :;; ' ' ' :::! : : : _') _ :: --,.: :r : : : : : : : : -" <L. { - J ' ' ' -,. '. ' Llf41T OF EARSHORE PEMET : BEAC FLL : - -. : _l_ j_ _l_ j_ _l_-?_ ::t : ' : : : : : E STG BOTTOM BOO u -. DSTACE FEET FROM R MOUMET BASELE : TYPCAL BEACH PROFLE : : : 1 _j : : --- -L : :._.: ' c ". L ;!!; = E...J ,)! t ""' 5 ẉ..., c a. D< a;c ;::: SCALE: A (HORZ) ll. u SCALE: B (VERT) a: (.!) DD ll...j......j <C[ < ll oa: o c >CO a.. (3 <: ll Z< c 1 W...JU u > <C[ Z< Cl ::l ll 1 co U1 1-::.:...J <C[ a:...j > D< u 1 3:a. : ::::; ) 1- ff 1 u._ "' lj.,.. "'! e:. "' ;; cu.! a! "' >l <...J L GRAPHC SCALES 2' 2' "A" PLATE 2" 2" "B" 2

39 -----S S H J H-2 H S-3 LAKE WORTH LET._---H-4 -==H H-5 1 S-4 R-9.5 ATLATC OCEA 11/ D:.:J S-5 MDTOW BEACH PLACEMET LOCATO (BEEFCAL USE, BEACH QUALTY SAD) 11::1:::t:::: =11 S-6 F' - --,.;;:;u S-7 R-1.5._----S-8. ' l S-9 GRAPHC SCALE...PJ=ttt H1::::j:j::::.J 11 S- 6' 6' 1""'""1 ) - S-11 S = (SEAGRASS MTGATO) H =(HARDBOTTOM MTGATO),... >... Fle namel D..Qftld by Scale; LAKE WORTH LET AVGATO PROJECT SRC Plot dotoo PALM BEACH HARBOR, FLORDA On byo Ckd byo Plot ocolo' ererence thn; SRC 12 LRP PROPOSED POTETAL MTGATO BEEFCAL USE STES Ootodo S[PT[jBER 212 FEASBLTY STUDY - EGEERG APPED DEPARTMET OF THE ARMY JACKSOVLLE DSTRCT. CORPS OF EGEERS JACKSOVLLE. FLORDA fp,r,lfl US Army Corps of Engneers Jacksonvlle Dstrct

40 LMESTOE BOULDERS ' DSTACEVARES TYPCAL CROSS SECTO LMESTOE BOULDERS (TYP.) HGH-RELEF, HGH COMPLETY HARDBOTTOM MTGATO SECTO.T.S. LMESTOE BOULDERS DSTACE VARES =----=..:..::...:..:c::..., 1.FTWTHA TOLERACEOF+1==:t=:;g, :::E L 2 OTE: TYPCAL CROSS SECTO LOW.RELEF, LOW COMPLETY HARDBOTTOM MTGATO SECTO.T.S. HORZ =SCALE: A VERT= SCALE: B 2'MMUM DESG S COCEPTUAL, ELEVATOS AD OTHER PARAMETERS ARE SUBJECT TO MODFCATO. VOLUTEERSEAGRASS 3 l L ----_L L L L_----L L L L L_-----L--L...-L--L TYPCAL CROSS SECTO SEAGRASS MTGATO AREA "B" GRAPHC SCALES L 2 2' 2' 2' 2' HGH-RELEF, HGH COMPLETY HARDBOTTOM MTGATO PLA.T.S. LMESTOE BOULDERS (TYP.) LOW-RELEF, LOW COMPLETY HARDBOTTOM MTGATO PLA.T.S... c)!._.,.. "'! " H cu ""' a. "' E... c ;::: -G: 1:1 ;::: s - u :1: ẉ.., c,_ D<.. a. :C a. ls c (.!) a: DD a: -'... "s < oa: o > <: Z< W...JU Z< oo 1-::.: a:...j D< 3:a. >l <...J co.oa:... (3 ll-!le -G:t... >- O Cl ll :::J ' U1 c > ;::'c - fll ::::; ff ll... a: u... -G: u,.. :',_ "' lj e:. (/) ;;.!! PLATE 22 5

41 ts 64 co (J) rky 9 SCo :_ S Sh 324 : Obstn :Fsh Haven (auth mn (J) (J) >< 522 Sh re1 SG )E ' q... >< q >< 145Wk ; 112Wk :S Sh Dump Ste (dredged materal) (see notes) PA-+++ s LMTS OF RELEASE ZOE n ll '(=875, u fs 53 7 fs 4QfS SCy rj' 1...f" f"".11,..., 74 h C ('.rj' "V,r. ACHORAGE AREA r.j'" 6 1. J 85 (see note A) S Co OTE:.RL1 rs ' FORMATO SHOW OBTAED FROM OAA AVGATO CHART J "-Hlf1 1 SOUDGS FEET, MEA LOWER LOW WATER (MLLW). C:...J >- u lj.j lj.j..., o._ D<: o._ :: <( o. o:: oo ---' e-ll rr <: oo:: <1: -D >CO _J (3 <1::: D.. Z<r :r: (/) >- CJ :r: :::E...JU CJ > Z<r D - ::J :r:cll >- (/) >-::E ::--' > D<r 3:o. J lj.j "' _J rn V <: <( ll 7>J.:;, ' PLATE 23