FACUL TAO DE INGENIERIA CIVIL CAPITULO 111: PLANEAMIENTO DE LA OBRA PARA SU EJECUCIÓN

Exhibit 5-1 summarizes the condition of the high-service pumping and storage facilities at the J. Robert Dean WTP at Florida City, the four booster pump stations and storage facilities, where applicable, and the Stock Island Backpump Station.

Additional discussion for each of these pump stations follows.

5.2.2.1

High-Service Pumping and Storage Facilities at the J. Robert Dean WTP

The existing high-service pumps were constructed in 1982 and consist of two 2,780 gpm at 580-foot pumps and three 4,170 gpm at 580-foot pumps. (The third 4,170 gpm at 580-foot pump was installed in 1985.) The firm capacity of these electric pumps is 20 mgd.

The Phase II High Service Pump Station project, which is currently under construction, is designed to provide a firm transmission system pumping capacity of 32 mgd from the Florida City WTP. The project consists of two 4, 170 gpm at 580 foot electric pumps. This pumping capacity is necessary so that downstream water storage tanks can be filled more quickly after periods of high demand or after transmission system pumping has been inter- rupted from a line break or other interruption of service. This project is expected to be complete by October/November 2006.

Four diesel-driven pumps are provided for emergency backup during utility power outages (see Exhibit 5-1). The total pumping capacity of these four pumps is 18.1 mgd, with a firm pumping capacity of 13.0 mgd. Pump Nos. 1 and 2 each have a capacity of 2,710 gpm at 580 feet, and were installed in 1987. Pump Nos. 3 and 4 each have a capacity of 3,574 gpm at 578 feet, and were installed in 1999. These four diesel-driven pumps are adequate to meet emergency pumping requirements under the current water demands. However, as water demands increase in the future, the emergency pumping capacity will need to be increased. A total of 12 MG of transmission storage in four ground storage tanks is currently provided at the J. Robert Dean WTP for the high-service pumping facilities (see Exhibit 5-1). The two 5 MG storage tanks have baffle walls to improve water distribution and minimize short- circuiting in the tanks. During the wet season, with the WTP producing the permitted treat- ment capacity of 23.8 mgd (also the permitted Biscayne Aquifer maximum wet season withdrawal rate), this 12 MG of storage will allow the high-service pumping facilities to pump at the firm pumping capacity of 32 mgd for approximately 36 hours (1½ days) before all storage is depleted. However, during the dry season, with the average dry season with- drawal rate from the Biscayne Aquifer, and treatment capacity limited to 17 mgd, this 12 MG of storage will allow the high-service pumping facilities to pump at the firm pump- ing capacity of 32 mgd for only approximately 19 hours before all storage is depleted.

EXHIBIT 5-1

General Pump Station Condition

Pump Station Pump Type2 xxx gpm @ yyy feet Motor HP Y/N xxx gpm @ yyy feet Engine HP Y/N Capacity (KW) Number and Capacity (MG) Condition Remarks

Florida City High Service Pumps1 VT VT VT 2 - 2,780 gpm @ 580 ft 3 - 4,170 gpm @ 580 ft 2 - 4,170 gpm @ 580 ft. 500 800 800 Y 2 - 2,170 gpm @ 580 ft 2 - 3,574 gpm @ 578 ft 1,000 1,000 Y 3 - 800 32.0 2 - 5 MG 2 - 1 MG Good3 Good3 Good

2 - 500 hp (Nos. 1 & 2) and 2-800 hp (Nos. 3 & 4) pumps installed in 1982. No. 5 800 hp pump installed in 1985.

New pump station housing 2 - 4,170 gpm pumps under construction. Construction complete about August 2006. Diesel-driven Pump Nos. 1 & 2 (2,170 gpm @ 580 ft) installed in 1987; Pump Nos. 3 & 4 (3,574 gpm @ 578 ft) installed in 1999.

Key Largo Booster Pump Station1 VT HSC 1 - 2,000 gpm @ 231 ft. 2 - 5,550 gpm @ 291 ft. 150 700 Y 1 - 16,660 gpm @ 291 ft. 1,700 Y 1 - 200 8.0 (@ 291 ft) None Good

Under construction. Construction complete about November 2006. Space provided for a third equivalent HSC electric pump.

Long Key Booster Pump

Station1 HSC

2 - 9,600 gpm @

210 ft. 600 Y

1 - 9,600 gpm @

210 ft. 715 Y 1 - 300 14.0 None Good

All pumps began operating in 1999. Concern of considerable check valve vibration at middle pump under certain conditions, depending on which pumps are running. No other improvements required.

Marathon Booster Pump

Station1 HSC 2 - 5,500 gpm @ 280 ft. 500 Y 1 - 5,500 gpm @ 280 ft. 685 Y 8 1 - 3 MG Good 4 _Good

Station constructed in 1986. Pumps are at end of useful life. Project currently being bid to replace the 2 existing electric pumps with 2 new 5,500 gpm electric pumps. Existing VFD's will be used. The 2 existing diesel driven pumps will be replaced with 1 - 5,500 gpm diesel driven pump. Pump capacities shown are for new pumps.

Ramrod Key Booster Pump

Station1 HSC

1 - 9,600 gpm @

210 ft. 600 Y

1 - 6,700 gpm @

255 ft. 960 Y 1 - 300 10 None Good Pump station upgraded in 1999. Other than repair of spauling concrete, no improvements required.

Stock Island Back Pump

Station1 HSC 1 - 3,500 gpm @ 397 ft. 685 Y 1 - 3,500 gpm @ 397 ft. N 5 None Good 5 _Good

Began operation in 1988. Both backpump station suction and Stock Island distribution pump station suction are from the 3-5 MG tanks. This station is designed so it cannot be operated remotely from anywhere; must operate from station. Backpumping capacity meets needs for foreseeable future. No improvements required.

Notes:

1

Onsite inspection and condition assessment performed on these stations.

3

Tank No. 3 (1 MG steel) installed in 1964, Tank No. 2 (1 MG concrete) installed in 1981, Tank No. 1 (5MG concrete installed in 1987, Tank No. 4 (5 MG concrete) installed in 2002. Exterior of Tank No. 3 (steel) painted within past 2 to 3 years. No record of exteriors of other 3 tanks nor interior of Tank No. 3 (steel) being re-painted since installed.

4

This tank was constructed in 1974. Last time exterior was repainted was about 5 years ago. Crom is to perform a complete tank inspection this year

5

All 3 tanks are steel. Tank Nos. 1 & 2 were constructed in 1956; interiors of these 2 tanks re-painted in 1988. Tank No.3 was constructed in 1973; interior of this tank re-painted in 1989. Interiors of all 3 tanks are currently being re-painted as part of the tank mixing improvements project. Exteriors of all three tanks were re-painted 3 to 4 years ago.

2

VT = Vertical Turbine

HSC = Horizontal Split Case

Characteristics of Transmission System Booster Pump Stations and Storage Facilities (Includes Stock Island Backpump Station) Standby Pumping Capacity

Number and Capacity of Pumps Number and Capacity of

Diesel-Driven Pumps Standby Generator Total Firm Design Pumping Capacity (mgd) Ground Storage Tanks WPB31012716136.xls/061990016

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When all planned RO treatment capacity (6.0 mgd Florida City plus 1.5 mgd Ocean Reef) is online, 7.5 mgd of RO capacity will supplement the 17 mgd limited treatment capacity from the Biscayne Aquifer during the dry season, to give a total dry season treatment capacity of 24.5 mgd. With this dry-season treatment capacity, the existing 12 MG of storage will allow the high-service pumping facilities to pump at the firm pumping capacity of 32 mgd for approximately 38 hours (approximately 1½ days) before all storage is depleted.

Another 5.0 MG of storage is planned for some time within the 20-year planning period, to give a total storage capacity of 17.0 MG at Florida City. With the 24.5 mgd total dry-season treatment capacity, the planned 17 MG of storage will allow the high-service pumping facil- ities to pump at the firm pumping capacity of 32 mgd for approximately 54 hours (approxi- mately 2¼ days) before all storage is depleted.

As noted in Exhibit 5-1, no record of re-painting any of the tanks since installation is available, except for the painting of the exterior of the 1 MG steel tank within the past 2 to 3 years.

5.2.2.2

Key Largo Booster Pump Station

This new booster pump station, which is located at MM 106, is the first booster pump station downstream of Florida City and is necessary to boost pressures in the transmission system so that 100 psi (desired; 70 psi minimum) suction pressure can be maintained at the Long Key Booster Pump Station. A 100-psi suction pressure is desired to allow this pump station to pump adequate volumes of water downstream to the Marathon Booster Pump Station and in turn to the Lower Keys. Besides the two new electric transmission main pumps, space for a future third equivalent electric transmission main pump is provided. This pump station also has a dedicated electric vertical turbine pump to boost pressures in the 12-inch-diameter Ocean Reef distribution main. The standby diesel-driven pump serves as a backup to both the two electric-driven transmission main pumps (and the third future electric pump) and the electric-driven Ocean Reef pump. This project is expected to be com- plete in November 2006.

Until the 36-inch-diameter transmission main segment between MM 93 and MM 98 is replaced, the Key Largo Booster Pump Station will not be able to boost transmission main pressures much because the maximum operating pressure in the MM 93 to MM 98 segment is limited to 190 psi (approximately 200 psi at Key Largo). The station’s primary function will be limited to boosting pressure in the 12-inch-diameter Ocean Reef distribution main and to boost transmission main pressure to approximately 200 psi discharge pressure.

5.2.2.3

Long Key Booster Pump Station

This facility was one of the original booster pump stations constructed by the U.S. Navy in the 1940s. Once the new transmission mains became operational in the early 1980s, this facility was no longer necessary, and was decommissioned. However, because of increasing water demands in the Middle and Lower Keys, this booster pump station was reactivated and upgraded in the late 1990s, and began operation again in 1999. This facility contains two electric 9,600-gpm pumps and one 9,600-gpm diesel-driven pump. The overall facility is in good condition. The only concern at this facility is vibration of the check valve at the middle pump and discharge header under certain flow conditions, depending on which pumps are running. This vibration causes the mechanical components of the check valve to wear out prematurely.

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5.2.2.4

Marathon Booster Pump Station and Storage Facilities

This booster pump station and 3.0 MG storage tank and the Marathon 33rd Street distribu- tion pump station and 0.5 MG storage tank are on the same site. The distribution pump station and recommended improvements are discussed in Section 6. The two storage tanks are interconnected. Normal flow is from the 3.0 MG tank to the 0.5 MG tank. Booster pump suction is from the 3.0 MG storage tank and distribution pump suction is from the 0.5 MG storage tank. Yard piping and valving provide flexibility so that the 0.5 MG tank can be fed directly, or the 0.5 MG tank can be bypassed so distribution pump suction could come directly from the 3.0 MG tank.

As noted in Exhibit 5-1, this booster pump station will be upgraded this year, at which time it will have a firm pumping capacity of 7.9 mgd. To evaluate the source of minor exterior seepage, a complete tank inspection was performed recently by Crom Tank. Crom has provided a report that recommends minor repairs to the tank exterior (Crom, 2006). To provide stronger capability for backpumping, FKAA is considering adding another 3.0 MG storage tank.

5.2.2.5

Ramrod Booster Pump Station

This facility was also one of the original booster pump stations constructed by the U.S. Navy. However, this station has been kept in service with upgrades over the years, with the most recent upgrade in 1999. With the exception of some spauling concrete at the bottom of a concrete slab adjacent to the pumps, this station is in good condition and no other im- provements are necessary.

5.2.2.6

Stock Island Backpump Station and Storage Facilities

Since this facility began operation in 1988, it has served FKAA well. Backpumping capabil- ities are adequate, and no improvements are required.

5.3

Transmission System Recommendations

This section describes the proposed improvements for the different components of the

transmission system that are described in Section 5.2. The locations of these improvements are shown in Appendix C. The recommended timing for all water system improvements is

discussed in Section 7, Capital Improvement Program, and in Section 8, Strategic Financial Plan.

5.3.1

Transmission System Mains

5.3.1.1

Jewfish Creek Bridge 36-Inch Transmission Main Relocation

Because the FKAA transmission main is within the highway right-of-way, FDOT considers that FKAA, and any other utility that has facilities within the highway right-of-way, is there for the utility’s convenience, and the utility is responsible for all costs to relocate their utilities to avoid conflict with the highway improvements or to provide easy access for maintenance and repair.

The funding for this project has already been expended, even though the transmission main is not yet relocated. FDOT requires a Joint Project Agreement (JPA) with FKAA, and all

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utilities, whereby FDOT requires the utility to provide to them up front the estimated cost to relocate the utilities. These funds are maintained in an escrow account, and gain interest until funds are withdrawn to pay for the construction. Additional funds will only be needed if the construction cost exceeds the funds in the JPA.

5.3.1.2

C-111 Canal Bridge 36-Inch Transmission Main Relocation

With the elimination of the C-111 Canal Bridge from this highway project, only minimal work relating to protection of the transmission main is anticipated, similar to what is

described below for the other 18-Mile Stretch segments below. While $100,000 in Fiscal Year 2008 is anticipated for protection of the transmission main, no CIP funding has been

allocated, as FDOT must reimburse FKAA for JPA funding that was already submitted to FDOT.

5.3.1.3

Other U.S. 1 8-Mile Stretch Highway Improvements that may Impact 36-Inch

Transmission Main

As noted previously, no transmission main relocation is anticipated for the last two seg- ments of this highway improvements project. It is anticipated that any work related to the transmission main will be minimal and will involve such items as concrete encasement and riprap placement to protect the existing transmission main during construction or after the highway construction is complete.