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Town of Longboat Key, FL2016 Phased Beach Nourishment ProjectTown of Longboat Key, FL2016 Phased Beach Nourishment Project
FSBPA National Conference onBeach Preservation TechnologyStuart, FL
Dr. Albert E. Browder, P.E., D.CE. – olsen associates, inc.Mr. Juan Florensa – Town of Longboat Key, FLMrs. Krista J. Egan, E.I. – olsen associates, inc.
9 February 2017
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Discussion Items
2016 Project Phases & Development
Construction Details
Timeline and ChallengesPermittingTrafficTurtles, turtles, turtles
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.Miami
.Jacksonville.Pensacola
.Tampa
.STUARTLONGBOAT KEY.
Gulf of Mexico
AtlanticOcean
FLORIDA
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.Miami
.Jacksonville.Pensacola
.Tampa
.STUARTLONGBOAT KEY.
Gulf of Mexico
AtlanticOcean
FLORIDA
LONGBOAT KEY
Gulf of Mexico
Tampa Bay
.Bradenton
.Sarasota
Anna Maria I.
Lido Key
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LONGBOAT KEY
Anna Maria I.
Lido Key
Tampa Bay
.Bradenton
.Sarasota
LONGBOAT KEY
Gulf of Mexico
Sarasota Bay
Sarasota Bay
Gulf of Mexico
ProjectPhases
CENTRAL KEYTRUCK HAUL
NEW PASSDREDGING &BEACH FILL
SOUTH ENDSUPPLEMENTAL TRUCK HAUL
LONGBOAT PASSDREDGING &BEACH FILL
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Project Development
Sand SourcesCosts
Post-Debby Hopper Dredge ProjectOffshore borrow areasProject bidding in 2013 was unsuccessful
Sand from both inlets became availableLeast costly sand of all optionsSmaller, fixed quantities available
Central Key – long distances, small volumesInefficiencies for hopper dredge construction
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Project Permitting
3 sets of FDEP & USACE permits
Truck haul elements
Longboat Key Master Beach Nourishment Permits Existing permits – modifications were required
Channel dredging permits
New Pass – shared with City of Sarasota for Lido Key
Longboat Pass – shared with Manatee County for AMI
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LOGG-N-30
LOGG-T-FL-17
PermitIssues
Loggerhead sea turtle Critical Habitat designations
Red Knot listingLONGBOAT KEY
Gulf of Mexico
Sarasota Bay
Sarasota Bay
Access updates
SCHEDULE COMPRESSION!
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Pre-project Conditions
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LONGBOAT KEY
Gulf of Mexico
Sarasota Bay
ProjectPhases
Sarasota Bay
CENTRAL KEYTRUCK HAUL
LONGBOAT PASSDREDGING &BEACH FILL
NEW PASSDREDGING &BEACH FILL
SOUTH ENDSUPPLEMENTAL TRUCK HAUL
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Central Key Truck Haul
Earth Tech Enterprises, Inc.Contract Total: $11MMobilization/Demob: $393,000$34.05/ton (~$51.07/cy)
307,503 tons~205,000 cubic yards
2,500 ft - fill segment 1
10,400 ft – fill segment 2
2,100 ft - fill segment 3
10 cy/ft up to 30 cy/ft
Average: ~15 cy/ft
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Central Key Truck Haul100 days
13,768 trucks~200 trucks/day (324 max)April 4 –July 13, 2016
Sand: Immokalee, FLStewart Materials mine
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South End Truck Haul
Earth Tech EnterprisesChange Order Cost: $1.8M
49,993 tons~33,300 cubic yards1,400 ft12 days
Sept 26 – Oct 7, 2016
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Traffic & Access
Designated haul route
On-island Pre-Staging Area4 access/loading points
16,018 trucks
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LONGBOAT KEY
Gulf of Mexico
Sarasota Bay
ProjectPhases
Sarasota Bay
CENTRAL KEYTRUCK HAUL
LONGBOAT PASSDREDGING &BEACH FILL
NEW PASSDREDGING &BEACH FILL
SOUTH ENDSUPPLEMENTAL TRUCK HAUL
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Norfolk Dredging CompanyOne contract – both channels
Contract Total: $5,045,450Mobilization / Demobilization: $1,290,000Sand unit price: $9.09/cy
Pullen24” cutterhead / pipeline dredge – 6,500hp
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New Pass Dredging & Beach Fill
234,000 cubic yards placed4,000 ft - fill segment7,200 ft max pump distance
33 days26 pumping days10,100 cy/day (avg. day)
16,600 cy maxAugust 18 – September 19, 2016
Post-Hermine repairsRedredged portions of channelRebuilt initial construction area
18,962 cubic yards replaced
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Longboat Pass Dredging & Beach Fill
215,400 cubic yards placed1,000 ft – fill segment #13,100 ft – fill segment #210,200 ft max pump distance
29 days22 pumping days11,100 cy/day (avg. day)
24,600 cy max
September 27 – October 21, 2016
Hurricane Matthew delays
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Sea Turtles…everywhere.
Record Year for Sea Turtle Nesting: 1,184 nests islandwide
Mote Marine Laboratory
201 nests relocated
Phased monitoring & relocation
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Public Information
Press daysWebsite coordinationPrint Media
Posters for Town HallHotel/condo rack cardsHandouts
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Central Key Truck Haul
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New Pass Dredging & Beach Fill
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Longboat Pass Dredging & Beach Fill
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LONGBOAT KEY
Sarasota Bay
2016Summary
Sarasota Bay
687,700 cubic yards placed
Two construction contracts
Seven beach segments
Construction Cost: $18M$26.17/cy (avg.)
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THANK YOUFSBPA National Conference onBeach Preservation TechnologyStuart, FL
Dr. Albert E. Browder, P.E., D.CE. – olsen associates, inc.Mr. Juan Florensa – Town of Longboat Key, FLMrs. Krista J. Egan, E.I. – olsen associates, inc.
9 February 2017