Red Lion Dike
Red Lion Dike
Red Lion Dike
- No tags were found...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Red</strong> <strong>Lion</strong> Public PresentationDelaware Bay <strong>Dike</strong>s Repair and Prevention ProjectProposed Plan for <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> RepairNew Castle Conservation DistrictDNRECJune 27, 2012© 2012 O’Brien & Gere
AgendaProject BackgroundProject ObjectivesEngineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and RepairAudience Comments and QuestionsNext Steps2© 2012 O’Brien & Gere
Project Background Delaware Bay <strong>Dike</strong> Repair and Prevention Project Authorized in Senate Bill 130› $3M appropriated Priorities for improvements:1. <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong>2. New Castle City <strong>Dike</strong>s (Gambacorta, Broad Marsh andButtonwood)3. Army Creek <strong>Dike</strong>3© 2012 O’Brien & Gere
Engineering Investigations Scope of Engineering Investigations Visual Inspections Gate Diving Inspection (<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong>) Geotechnical Investigations Topographic Mapping4© 2012 O’Brien & Gere
Engineering InvestigationsSite Location Map – <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong>5© 2012 O’Brien & Gere
Engineering InvestigationsSite Location Map – City of New Castle <strong>Dike</strong>s6© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Inspection7© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Inspection8© 2012 O’Brien & Gere
Engineering InvestigationsUnderwater Inspection of <strong>Red</strong> <strong>Lion</strong> Creek Tide Gate Performed on July 26, 2011 by Collins Engineers, Inc. on behalf ofDelaware DOT Found to be in overall good condition Item to be monitored or repaired Sheet Pile and Metal Pipe Corrosion Pipe Connection9© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Geotechnical Investigation10© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Geotechnical Investigation11© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Topographic Survey – Plan & Profile12© 2012 O’Brien & Gere
Engineering InvestigationsBroad Marsh <strong>Dike</strong> Plan & Profile14© 2012 O’Brien & Gere
Engineering InvestigationsButtonwood <strong>Dike</strong> Plan & Profile15© 2012 O’Brien & Gere
Engineering Investigations<strong>Dike</strong> Elevation Design Criteria16© 2012 O’Brien & Gere
Engineering InvestigationsKey <strong>Dike</strong> Data from Topographic Surveys<strong>Dike</strong>Approximate<strong>Dike</strong> Length (FT)Minimum CrestElevation(FT NAVD 88)Length-weightedAverage Elevation(FT NAVD 88)South End of <strong>Dike</strong>Elevation(FT NAVD 88)North End of<strong>Dike</strong> Elevation(FT NAVD 88)<strong>Red</strong> <strong>Lion</strong> 1,900 4.1 6.8 8.2 8.6Gambacorta 1,600 6.8 8.2 7.4 8.0Broad Marsh 1,350 5.2 7.8 6.7 8.0Buttonwood 1,800 5.8 7.5 10.0 7.9USACE RIP Minimum Elevation – 8.2’100-year FEMA Stillwater – 9.0’17© 2012 O’Brien & Gere
Engineering InvestigationsCity of New Castle Gambacorta <strong>Dike</strong> Minimal Raising Required Extensions Needed atNorth and South Ends Outboard Erosion to beAddressed Unwanted Vegetation18© 2012 O’Brien & Gere
Engineering InvestigationsCity of New Castle Broad Marsh <strong>Dike</strong> Raising Up to 3.8 FeetRequired (2-ft. Average) Extension Required atSouth End Unwanted Vegetation19© 2012 O’Brien & Gere
Engineering InvestigationsCity of New Castle Buttonwood <strong>Dike</strong> Raising Up to 3.2 FeetRequired (1.7-ft. Average) Minor Extension Requiredat South End Unwanted Vegetation20© 2012 O’Brien & Gere
Engineering Investigations<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Findings Settlement Revetment Protection Loss Erosion Overtopping Seepage Unwanted Vegetation21© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and RepairRecommendations:• Raise <strong>Dike</strong> to Elevation 9.0 feet (MinimumElevation 8.5 Feet)• Enlarge <strong>Dike</strong> in Portions (Raising andBroadening)• Supplement/Replace Protected Side Rip Rap• Remove Trees and Woody Vegetation• Construct Filters on Seepage Areas22© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and Repair<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Improvements – Plan & Profile23© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and Repair<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Improvements24© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and Repair<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Improvements25© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and Repair<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Improvements26© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and Repair<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Improvements – Estimated Construction CostsDESCRIPTIONTOTAL COSTOverall Site Preparation, includes: $70,000Clearing/grubbing, common fill for access roadway, topsoil strippingFlood (Bay) Side Improvements, includes: $500,000Rough grading, earthfill (where required), geotextile, cushion stone layer, riprapProtected (Land) Side Improvements, includes: $160,000Rough Grading, replenish riprap, earth fill (where required), geotextile, turf reinforcement matCrest Improvements, includes: $165,000Rough grading and compaction, new aggregate surfacing, geotextileExisting Flood Wall Improvements, includes: $40,000New sheet pile material for extensions, trim existing sheet piles and prep for splicing, splice/weld heightextensionsNew Flood Wall Improvements, includes: $215,000New 20’ long sheet piles, mob/demob pile driving rig, set temp. drive template, set and drive sheets, cutoffand cap sheets with C-channel.Temporary Cofferdam for repair of washout area, includes: $75,000Rent Z-sheets, drive guide piles/template, set and drive sheets, extract and clean sheets.Site Restoration, includes: $60,000Topsoil and seeding, fine-grading of crest/roadway, fine-grading of slopesSubtotal $1,285,000Contingency (35%) $450,000Total $1,735,000Optional: Additional cost to raise earth dike portion to EL 9.0 $50,000Optional Total $1,785,00027© 2012 O’Brien & Gere
<strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> Upgrade and RepairPermit RequirementsUS Army Corps of Engineers (Section10 and Section 404)DNREC Wetlands and Sub-AqueousLandsNPDES Stormwater DischargeAssociated with Construction ActivityNew Castle County FloodplainNew Castle County Application for PlanReview28© 2012 O’Brien & Gere
Audience Comments and Questions29© 2012 O’Brien & Gere
Next StepsComplete Detailed Design of <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong>ImprovementsPrepare and Submit Permit Applicationsfor <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong>Advertise for <strong>Red</strong> <strong>Lion</strong> <strong>Dike</strong> ConstructionComplete Preliminary Design Plans for Cityof New Castle <strong>Dike</strong>sSchedule Progress Meetings with City ofNew Castle <strong>Dike</strong>s Committee30© 2012 O’Brien & Gere
New Castle Conservation DistrictDNREC31© 2012 O’Brien & Gere
Change language