www.mymanatee.org
Manatee County Government Administrative Center Manatee Room, Fourth Floor 1:30 p.m. - December 9, 2014
December 9, 2014 - Afternoon Work Session
Agenda Item #1


Subject
Briefing on the Beach Renourishment Effort of 2014, the Pending Construction of the Cortez Beach Groins and Longboat Pass Management Study Update

Briefings
None

Contact and/or Presenter Information
Charlie Hunsicker, Director, Parks and Natural Resources
Charlie.hunsicker@mymanatee.org, ext. 6001

Action Requested
Work Session.  No action required.

Enabling/Regulating Authority
N/A

Background Discussion
  • In 2014, Manatee County and the Army Corps of Engineers completed a beach renourishment effort for approximately six miles of sandy gulf front beaches for approximately $16 million, with considerable cost savings realized by combining in sequence the federal project from 78th Street North in Holmes Beach, south to 5th Street South in Bradenton Beach with a State and County funded project beginning at 5th Street South in Bradenton Beach and proceeding south to Longboat Pass.  The work session presentation will discuss this effort.
  • Manatee County has also completed the design permitting and bid process to reconstruct three significant erosion control structures at the south end of Anna Maria Island in the area known as Cortez Beach.  Competitive bids have been received and the responsive and responsible bidder, which has proposed a construction cost of $4.7 million to complete all three groin reconstructions, will be presented for Board approval at the December 16, 2014, meeting.  This work session will describe how these reconstructions will take place.
  • In 2011, Manatee County began working with the Town of Longboat Key to update a study of the navigational channel through Longboat Pass to refine previous modeling of the dynamics of the channel itself within Longboat Pass that was performed by the West Coast Inland Navigation District.  Period maintenance dredging to remove shoaling in the Pass is required to maintain navigation between Sarasota Bay and the Gulf of Mexico through the Pass itself.  Permits to provide maintenance dredging of the navigation channel must be preceded by extensive computer modeling to predict changes to a.) the gulf bottom, b.) flood and ebb shoaling affected by the channel, and c.) anticipated responses of erosion or accretion of the gulf front shorelines on either side of the Pass.  Manatee County has assumed the responsibility for the cost of  preparing the design and permit for extended plan of navigational channel maintenance. 
  • The Town of Longboat Key and Manatee County have  in the past shared equally in placing beach quality sand dredged from the maintenance of the Pass on its gulf side beaches and will continue this sharing of high quality sand in  future maintenance dredging projects.   Because Manatee County has recently completed its renourishment of the beaches of Anna Maria Island on the north side and adjacent to Longboat Pass, it has no immediate need for the sand that will be removed with the next maintenance dredging of the Pass anticipated to be performed in 2015-2016.  Accordingly, the Town of Longboat Key will cover the cost of the next maintenance dredging action and utilize all of the sands removed on their adjacent beaches on the north end of Longboat Key.  Future Pass dredging maintenance actions on a four to eight year interval will provide for equal sharing of beach quality sand averaged over a multi-year perspective.  The work session presentation will conclude with a discussion of these principles, practices and joint responsibilities between the Army Corps of Engineers, the West Coast Inland Navigation District, Manatee County, and the Town of Longboat Key in maintaining the navigational channel in Longboat Pass.


County Attorney Review
Not Reviewed (No apparent legal issues)

Explanation of Other


Reviewing Attorney
N/A

Instructions to Board Records
N/A

Cost and Funds Source Account Number and Name
Cost for beach renourishment, erosion control beach groin construction, and local costs of inlet navigational channel maintenance are budgeted with the dedicated one cent of the Tourist Development Council funds.

Amount and Frequency of Recurring Costs
To be discussed


Attachment:  Hunsicker-Pierro-BCC Work Session Dec 9-2014_final.pdf