North-end beach UPDATE

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The town’s engineering firm, Coastal Planning and Engineering (CPE) is currently running models on several structural solutions for the north end’s beach erosion. Although the permit for the groins is estimated at January 2013, according to Public Works Director Juan Florensa, CPE is working on the best solution for the sand erosion now. The north end beach is a highly erosive ‘hotspot’ on the island.

Among the options being considered, says Florensa, are breakwaters (an underwater wall parallel to the shoreline), moving the rock jetty further north along the beach, and the addition of two permeable adjustable groins.

The models should be done by mid-June, says Town Manager David Bullock. Once the CPE modeling results are done, the work will be presented to the Florida Department of Environmental Protection (FDEP) for approval. Bullock added that once the FDEP gives its input on the modeling, all of the information will be presented to the commission and they will decide which options are best for the north-end beach based on CPE and FDEP recommendations.

If the town receives permitting approval by Jan. 2013, then with the additional time needed for acquisition of funding and mobilization, construction may begin around Dec. 2013, says Bullock.

Additional funding for the groin project is still problematic, as the town was recently denied partial funding by Manatee County Commission and West Coast Inland Navigational District (WCIND) two weeks ago. Bullock says he is not giving up, however, stating, “I never take the first ‘no’ for a final answer.”

The town finished adjusting the two groins at the Islander Club on May 16. Results from the sand accretion rates were analyzed, and it was determined the groins needed adjustment. As part of the approval for the construction of the permeable adjustable groins, the town was directed to monitor the groins’ effects to the adjacent shoreline by the FDEP. The groins were designed and permitted with the ability to adjust for sand by-passing. The results of the report show the performance of the groins since their completion date of April 30, 2010.

The report stated that the groins are having a positive impact on adjacent beaches to the north by adding sand, and negative impacts to the beach to the south. The erosion of sand to the south of the groins meant that increasing the permeability of the groins was needed.  According to a memo by Public Works Project Manager James Linkhogle, increasing the permeability will not result in a quick repair to the beach to the south, however, and the town may need to add sand to the south of the groins to replenish the beach.

Linkhogle wrote that the plan to adjust the groins called for removal of 120 pre-cast concrete elements from the northern groin and 90 from the southern, beginning from the seaward end of each groin, for a total of 210 elements. There are a total of 1,688 pre-cast concrete elements in both groins combined.

Work began on the groins on May 7, all required elements were removed by May 16, and the final cost for the project was $24,700.



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Longboat Key News

2 Responses for “North-end beach UPDATE”

  1. David Baughman says:

    the residents of the north end of the key appreciate the concern shown by the town and the other more southerly residents, after all, if the current north end is allowed to erode away, a new north end will re-emerge at the whitney Beach condo’s and the erosion will continue until effective corrections are made. Eventually, the north end might be the south end and then I’ll bet heads will roll.

    I have not heard of the underwater wall approach to breakwaters, the only ones I’ve heard of were above water and spoiling the view of the Gulf. Is there anyone with a description of the new beakwater approach and where they would plan to put it?

  2. Ghostrider says:

    Operation Redistribution : “adjustable groins”

    The only problem with adjustable groins is that Nature has to sign on, unless of course you think that we always prevail. You are not creating sand, you are merely redistributing it.
    Who ultimately loses it is the question at hand.

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