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Cove Stormwater Pump Station Outfall Improvement Project

Public Meeting Notice

The City of Naples operates a permitted stormwater pump station at the intersection of Broad Avenue South and 9
th Street South, more commonly known as the Cove Stormwater Pump Station. It was built in 1965, rebuilt in 2010 and is permitted by the South Florida Water Management District (SFWMD) #11-00343-S. The station receives drainage from approximately 440 acres of urban lands, of which 43 acres is zoned as commercial. Please see Figure 2. Drainage Basin. The station has three main pumps rated at 25,000 GPM and one jockey pump rated at 4,000 GPM. During significant storm events (which is typically once or twice a year), all three main pumps have the capacity of discharging up to 75,000 GPM. The average rainfall event typically requires one main pump (25,000 GPM); however high rainfall intensity may require two main pumps (50,000 GPM) for a short duration. Over the course of a year, it has been calculated that the station discharges approximately 450 million gallons of stormwater. 

Decades worth of discharge have resulted in accumulation of sediment
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Cove outfall aerial

Environmental Issues of Concern

According to the Florida Department of Environmental Protection (FDEP), the number one pollutant in Florida is stormwater runoff. Stormwater carries all manner of substances from the land into the water. This includes chemicals from fertilizers and pesticides, oil products from vehicles, heavy metals from a variety of sources, bacteria, and yard vegetation. Naples Bay is identified as an impaired water body for copper, iron, and fecal coliform (bacteria). Also, FDEP has set limiting nutrient criteria for Naples Bay.

The City of Naples stormwater system provides a conduit for stormwater runoff to enter Naples Bay via the Cove Pump Station. This runoff carries some level of all of the above-referenced pollutants from the land to the bay’s waters. Since January of 2006, the City has been collecting water samples from Naples Bay in an effort to assess trends and make management decisions concerning the restoration of Naples Bay. Because of its deep concern for the health of Naples Bay, the City of Naples has carried out several programs to proactively reduce the amount of pollution entering Naples Bay prior to establishment of a BMAP. This project is intended to be a major effort at reducing the pollution in stormwater runoff entering Naples Bay.

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Cove outfall area January, 2015

Addressing the Issues

Cove Outfall Improvement Project Goals

1. Dredge and dispose of sediment and material that has accumulated at the terminus of the City of Naples Cove Pump Station stormwater outfall into Naples Bay. As seen by aerial photography, the deposition and migration of sediment may not be limited to the dedicated lands owned by the City. Careful consideration is needed regarding the chemical make-up of the material, where it might be disposed or reused, and whether this project should expand the dredge project beyond the dedicated lands or limit dredging in the area of City control. A pre-application meeting with permitting agencies may shed light on the project limits issue; however, a strategy should be developed prior to meeting with agencies.

2. Design and permit a detention/settling basin within the submerged lands dedicated to the City. In order to prevent the migration of sediment and materials from the dedicated lands into Naples Bay, the selected firm will be required to design a containment system that allows solids and total dissolved solids to settle within the City controlled lands. The containment system should allow for future removal of accumulated material through a standardized maintenance approach that is designed to minimize cost, time and neighborhood impacts.

The detention/settling basin shall also be designed to remove other pollutants from stormwater runoff, possibly through native species of vegetated plantings and filtering media that do not impair water flow from the pump station.

3. Based on prior pollutant loading analysis, estimate the potential reduction in pollutants as a result of the proposed design. Prior to committing significant funding towards construction, the City requires a thorough analysis of cost benefit at the 60% design level. Cost per pound of total pollutants removed may be one way to quantify cost benefit; however, an estimate of individual pollutants such as nutrients, copper, total suspended solids, and bacteria will also be required.

4. While the City expects the selected firm to design a the most cost effective and efficient project possible, we also desire to obtain grants to complete construction of the project potentially through the Florida Section 319 Grant, South Florida Water Management District, TMDL Water Quality Restoration Grant, or others on behalf of the City of Naples.

5. The City expects the qualitied firm to also be experienced and qualified in construction engineering inspection, although this scope for work may or may not be developed as a subsequent phase to this design / engineering / permitting process. 

Proceeding with engineering design and consulting services

Stantec Consulting was selected from a pool of qualified firms to work with the City on the Cove Outfall Project.  Stantec was awarded a contract and received an official notice to proceed in May, 2015.

To begin, the City of Naples entered into an agreement with Stantec Consulting to investigate field conditions and complete a preliminary design of improvements to remove accumulated sediment in the area just south of Broad Ave. South and just east of 9th St. South known as the Cove Pump Station outfall area (see location map).  Over the next few months, surveyors, ecologists, geologists and engineers will be on site gathering data to begin the design and regulatory processes.  After the data is collected and very early in the design stages of the project, a public meeting will be held (data and location yet to be determined) where the public’s input is welcomed.   Public Meeting Notice

Stantec PowerPoint

Questions concerning this project can be directed to Andy Holland of the City of Naples Streets and Stormwater Department at 213-5001.  Questions can also be directed to Kelly Blake of Stantec Consulting at 239-263-6403.

Questions or comments
Andrew Holland, P.E.
Engineering Manager, City of Naples, Phone: 239-213-5001

Kelly Blake, P.E.
Stantec Consulting Servies, Inc., Phone: 239-263-6403

Monday - Friday
8:00 am - 5:00 pm
For questions or comments regarding the Cove Pump Station Outfall Improvement Project please contact Andrew Holland at the City of Naples or Kelly Blake with Stantec Consulting.

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Cove Outfall area January, 2015