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Lido Key Beach Renourishment Program & New Pass Dredging

Lido Key Beach Renourishment Program & New Pass Dredging. Dennis Daughters, P.E. City Engineer / Director of Engineering, City of Sarasota. Location, Location, Location. New Pass. Big Sarasota Pass. Lido Key. Lido Key Beach Erosion Control Projects Presentation Content. History of Island

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Lido Key Beach Renourishment Program & New Pass Dredging

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  1. Lido Key Beach Renourishment Program & New Pass Dredging Dennis Daughters, P.E. City Engineer / Director of Engineering, City of Sarasota

  2. Location, Location, Location New Pass Big Sarasota Pass Lido Key

  3. Lido Key BeachErosion Control ProjectsPresentation Content History of Island Long Range Master Plan Projects 1997 New Pass Dredging 1998 Restoration 2001 Interim Restoration 2002 New Pass Dredging 2004 Federal Nourishment

  4. History of Island • New Pass formed in 1848 by hurricane. • Initial dredging of New Pass in 1926. • Group of small detached mangrove islands, “Cerol Isles”. • filled by John Ringling in the 1920’s. • City purchased16.2 acresat mid-section in 1938. • built a public spa and casino. • County purchased153 acresat South Lido area in 1974. • dedicated South Lido Park to be preserved in a natural state. • City purchased60.9 acresat north section in 1977. • dedicated North Lido Park to be preserved in a natural state.

  5. Long Range Master Plan • City obtained services of Coastal Planning & Engineering (CPE) in January 1990 to develop long-range beach management and erosion control plan. • CPE completed Long Range Master Plan in January 1991. • Plan examined 7 erosion control alternatives, a buy-out/ retreat approach, 4 renourishment options and an offshore breakwater. • Plan recommended renourishment of 9,000 feet of beach(from R-35 to R-44) at minimum width of 75 feet.

  6. Inlet Management Plans • FDEP required City to develop Inlet Management Plan for both, New Pass and Big Sarasota Pass. • City obtained services of CPE in June 1992 to develop both Inlet Management Plans. • CPE completed New Pass Inlet Management Plan in June 1993 and Big Sarasota Pass in September 1993. • Both Plans included Sand Sediment Budget. • New Pass IMP recommended continual periodic dredging of New Pass channel. Big Pass IMP did not. • Town of Longboat Key disagreed with Sand Budget. • Neither Plan approved by FDEP.

  7. New Pass Dredging Project • Federal maintenance began in 1964. • Eight Projects done. • Dredging has occurred about every 4-5 years. • 2 ¼ million cubic yards dredged in last 35 years (8 projects). • Average 280,000 c.y. per dredging.

  8. 1977 1991 1970 1997 1974 1985 2002 1982 1964 Cubic Yards Dredged

  9. LONGBOAT KEY 1964, 1970, 1974, 1977 CHANNEL ALIGNMENT 1982, 1985, 1991, 1997 CHANNEL ALIGNMENT LIDO KEY

  10. 1997 New Pass Dredging • New Pass Dredging Project - USACE • Hendry Dredging began June 15, 1997 • Placed 163,000 cubic yards (50% of total) on north part of Lido Beach • Completed work in September 1997 • No local funds involved

  11. 1998 Restoration Project • City/State Funded Project • Applied for grants for many years • Received 25% State grant in May 1997 • Placed 285,000 cubic yards in May 1998 • Total cost = $3.41 million. ($12.00/Cubic Yard) • Protection from Earl, Georges & Harvey

  12. Hopper-type Dredge Weeks Marine’s operation during 1998Lido Beach Restoration Project

  13. 2001 Interim Lido Restoration Severe erosion incurred in last few years E’Legance condominium lost almost all of their newly constructed dune

  14. Southern Lido Key South end of 1998 Restoration Project Serious erosion

  15. 2001 Interim Lido Restoration Buildings were in jeopardy

  16. 2001 Interim Lido Restoration • Benefits • Storm protection- private & public • Recreational- longitudinal beach access • Economic- increased tourist tax dollars • Environmental- increased areas for vegetation, sea turtle nesting, etc.

  17. Ebb shoal extends south Severe erosion and exposure of Lido Harbor and Lido Harbor South Note gray sand from 1998 Project 2001 Interim Lido Restoration Big Sarasota Pass North

  18. Beach Fill Comparison Beach fill for “Feeder Beach” concept St. Armand’s Key Beach fill for “Groin” concept Lido Key

  19. Pool Pool 2001 Interim Lido Restoration After Before

  20. 2001 Interim Lido Restoration During

  21. Limits of Projects 1997 Project limits

  22. 2003 New Pass Dredging • Sarasota County is “Local Sponsor”. • City/County worked together to obtain funding for USACE. • Congressman Dan Miller was of great assistance in getting approval. • City of Sarasota and Town of Longboat Key will share the sand on 50/50 basis.

  23. USACE is now going to dredge in this location, as they did the last 4 times. Normal shoreline when dredging is straight out. USACE wanted to dredge in this location.

  24. 2002 New Pass Dredging • USACE awarded contract on 30 September 2002 to Goodloe Marine, Inc. • Bid amount for New Pass project is $2,231,050. Gordon Pass will be extra $$. • Pre-construction meeting was held on November 1, 2002. • Construction to began 15 December 2002. • Completed Lido portion on 1 Febr. 2003.

  25. Material to be removed 100 feet inside Pass 150 feet outside Pass 10 foot Required Depth With 2-foot allowable overdepth 2002 New Pass Dredging Water Surface Existing Waterway Existing Bottom Typical Cross-section

  26. White Sand Issue Gray sand compared to natural beach color Some people don’t like gray sand.

  27. White Sand - Status • Sand dredged from New Pass is “white” sand. • USACE included two options in their contract for New Pass Dredging with City to pay difference. • Stock pile 123,000 cy at R-35.5 to R-38.5 or, • Spread 123,000 cy from R-35.5 to R-44. • City’s actual share will be $98,050 plus 7.5% Admin. costs. • “White” sand was spread from north of Holiday Inn to Big Sarasota Pass, if there is sufficient sand.

  28. 2002 White Sand Project Place 2’ layer of white sand Move 2’ of gray sand to water’s edge Move 2’ of gray sand to water’s edge Elevation +5.0 Lido Resort Or Condo Water surface White sand layer Existing Gray Sand Beach Beach Cross-section

  29. Federal Nourishment Project • Initially authorized by Congress - December 31, 1970. • De-authorized by USACE - January 1, 1990. • Approval for Reconnaissance Study - 1994. • Reconnaissance Study completed - January 1997. • Feasibility Cost Sharing Agreement • Signed by City - July 20, 1998. • Signed by USACE - July 20, 1999. • Re-authorized by Congress - August 7, 1999 • 65/35 of initial project and 50 year commitment.

  30. Federal Nourishment Project • Feasibility Study began - November 2000. • $700,000 shared 50/50. • Now 95% complete. • Submit to Congress January 2003. • Selected Plan – 1,075,000 cy and 3 groins. • Design / Construction Phase -Year 2004 • $12.95 million with City’s share about 37.3%. • State grant program may fund 50% of City’s share. • Renourishment Phase -Year 2008, 2012, 2016. • $5.3 million to be shared 50/50.

  31. Federal Nourishment Project St. Armands Circle New Pass Big Sarasota Pass Sand Placement 3 Groins

  32. TDT Funding Commitments Original 2% levy: • $300,000/year (more or less) Additional 1% levy: • $1.1 million in FY 97/98 • $304,000 in FY 98/99 • $146,000 for 6 years FY98/99 to FY 03/04 • $1.1 million in FY 01/02

  33. Funding Grants • The City of Sarasota, with great assistance from Lido Key residents/owners, haspro-activelyobtained additional state and federal grants. • The 1998 project required75%local funds. • The 2001 & 2002 projects required53%local funds. • The 2004 project will require19%local funds.

  34. Revenue $7.1 million fromCounty TDT $3.4 million fromState DEP $0.4 million fromFederal

  35. Lido Key Beach Maintenance Program & New Pass Dredging City of Sarasota Thanks You Enjoy your Lido Beach !

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