« The Balancing of Power | Main | Time for Some Good News »

May 14, 2008

Comments

Willie Lowman

Larry, Great article. Water is becoming a scarce commodity everywhere in the world and we will have to pay the price. Even those previously pristine areas of the world where you could drink straight out of lakes and streams are disappearing with all the pollution we have produced. Life as we know it will die without potable water. One untried solution is to proactively and quickly mutate all life forms on earth, including humans, to adapt to consuming polluted water. The sciences that brought us plastics, radioactivity and disposable diapers will save our bacon. Hooray for science.

Nick Higgs

We can take a leaf out of Bermuda's book (scroll down http://www.bermuda-online.org/architecture.htm). By law 80% of water that falls on a roof in Bermuda must be collected in tanks. Water is strictly regulated although they also rely mainly on freshwater lenses. I remember growing up in the family islands without piped water and only living off of rainwater that we collected.

larry smith

Yes, I left out a discussion on rainwater catchment because the article was already too long and experts say it is no real solution.

Back in the day, we used a lot less water and had no option, so rainwater tanks were a big help.

They can still be useful today (for flushing purposes), but the high cost of storage and the fact that the water is not considered potable (because of toxic roofing materials) make them ineffective as a solution for current and future water consumption.

Sam Duncombe

And yet we are about to allow Albany to put a golf course on top of the islands largest water table. THeir marina also poses a threat to the watertable. Are we all just sticking out heads in the sand while we let developers do what they want with our resources? What a disgrace!

Sakina

I am from the US and of course their is a global problem with water and water politics. The problem is local apathy. Demonstrations need to be organized locally and globally for our survival. We need more than an occassional Earth Day movement and engage our local representatives.

adam bronson

My company has been lightly examining the Bahamas as we go forwards to establishing our first manufacturing facility for small to mid scale desalination units. I agree that rainwater isn't the answer. The sea is.

The problem with many countries, including the Bahamas, is that the population is scattered and there are many islands to service. Just the distribution system for a plant is often cost prohibitive enough to eliminate thoughts of a small RO plant.

The solution is many small units, either one per household, or one per group of homes, with the cost borne by the homeowener, and perhaps subsidized by the country. By becoming fully reliant on the ocean, the municipal systems need no t expand, and could eventually take a secondary place in the priorities of water policy.

We have a technology which is maintenance free. It is remarkably simple, energy efficient, and compact, and does not exhibit any membrane fouling whatsoever. Units have been in tropical operation for four years, and no breakdowns or downtime. In fact contrary to all other RO systems invented, flux doesn't dimish year on year (designed to make 10 or 20 m3 per year, it does it year after year).

If someone reading this has a dialogue with the water authority of business arm of the government, we'd be intersted in a chat. Thanks.

adam

wpms model un club

what do you guys do about the water shortage?

wpms model un club

Pipeline Proposal Aims To Fix Nassau Water Shortage
Hydro Bahamas is proposing an initial contract with the Water & Sewerage Corp. for a guaranteed minimum of 10 million gallons of fresh water per day to New Providence.

A Bahamian company is awaiting final Cabinet approval on a multi-million dollar pipeline project that could solve New Providence's increasing water problems by transporting fresh water from Andros to this island at a price that it believes will be almost 23 per cent cheaper than what the Water & Sewerage Corporation presently pays or could be delivered by a reverse osmosis plant.

Documents seen by The Tribune show that Hydro Bahamas plans to develop a new 26 million gallon wellfield in Central Andros and transport the extracted fresh water to New Providence via a deep sea pipeline, tapping into natural resources which, according to the Water & Sewerage Corporation's own research, can supply 210 million gallons of fresh water per day from north and central Andros alone.

Hydro Bahamas is proposing an initial contract with the Water & Sewerage Corporation that would see it supply a guaranteed minimum of 10 million gallons of fresh water per day to New Providence, with built-in redundancy capacity to extract a further five million gallons.

The company could eventually expand its fresh water extraction and supply business to 30-40 million gallons per day, which sources say would cover New Providence's water needs for at least "the next 50-100 years".

According to the Water & Sewerage Corporation, New Providence is projected to need 13 million gallons of water per day by 2005, yet currently only received 8.5 to nine million gallons per day. Some 4.5-5 million gallons are shipped in by two barges from north Andros, with the remainder coming from the existing Waterfields reverse osmosis plant and existing wellfields on this island.

The Corporation has forecast that by 2013, New Providence is likely to need 16 million gallons per day, almost double what it needed in 2000.

Some sources believe the real demand in 2013 could be closer to 18 million gallons of water per day.

According to the Hydro Bahamas plan obtained by The Tribune, its pipeline plan could provide a long-term solution to New Providence's water shortage problems. However, the company is understood to consider that its plans are not viable - it needs to supply a minimum of 10 million gallons per day - if the Water & Sewerage Corporation presses ahead with plans for the construction of a $20 million reverse osmosis plant at Blue Hills.

The tenders for a plant capable of producing 5 million gallons per day have already gone out, and Consolidated Water - the Cayman Islands-based company that already owns the Waterfields plant and is understood to be the front-runner for the Blue Hills contract. The Blue Hills plant could eventually be expanded to a six million gallon per day capacity.

In its recent fourth quarter results announcement, Consolidated Water said it was the lowest bidder on a 20-year contract to supply and operate a 6 to 7.2 million US gallon plant that would provide bulk water supplies to Nassau and was awaiting evaluation of its offer by the Water & Sewerage Corporation.

However, Hydro Bahamas is understood to believe that any move towards reverse osmosis does not make sense for either economic or environmental reasons, a position that appears to be backed by experts. The company believes water produced by reverse osmosis will be more expensive than the fresh water it extracts.

In a research note, Donald McCorquodale, a professor of oceanography, said: "If you have proven natural resources of fresh water in your country, I would strongly recommend that you explore this option first."

Doing so would make the Bahamas more independent and leave it less vulnerable to fluctuating oil prices.

He also warned that to produce one gallon of fresh water via reverse osmosis, at least one gallon of "salt brine" was created, meaning this had to be disposed of. Professor McCorquodale said this "could represent an environmental hazard and has therefore to be blended at 70:1 before it can be returned to the ocean".

Although desalination plants such as the one the Water & Sewerage Corporation had put out to tender had been shown to deliver good quality water, the plants were heavily energy dependent, leaving them vulnerable to increases in inputs such as oil and energy costs.

In addition, the tender document sent out to bidders by the Water & Sewerage Corporation appears to leave the Corporation responsible for picking up the winning bidder's electricity costs and diesel fuel costs whenever there is a BEC power cut.

The tender document, a copy of which has been seen by The Tribune, said that provided the successful bidder met the agreed amount of water delivered and the "KVA Maximum Demand" did not exceed guarantees made at the time of the bid, "the [Water & Sewerage] Corporation shall incur the actual net billed costs of electrical power (Kilowatt Hours and KVA Maximum Demand per annum) consumed during the Desalinated Water Delivery Period)".

The Tender added: "The Corporation shall pay all invoices presented by BEC for the electricity and maximum demand required to operate the plant during the Desalinated Water Delivery Period."

On a power cut, a Tender clause said: "In the event of BEC power supply failure or excursion, diesel fuel used by the standby diesel generator for the production of electricity for desalinated water production shall be paid by the [successful bidder] to the fuel oil supplier and the [Water & Sewerage] Corporation will reimburse the [bidder]......"

Effectively, the tender means that the Bahamian taxpayer, through the Water & Sewerage Corporation, could end up underwriting the business plan and costs of a company such as Consolidated Water, which is listed on the US-based Nasdaq stock exchange.

The tender also appears not to address how the successful bidder will dispose of any "brine" that is produced.

The Hydro Bahamas project, which has a projected overall cost of $124.4 million, will involve no capital investment or construction risk on the Government's part. Hydro Bahamas would only charge the Water & Sewerage Corporation once fresh water started to flow, with the price based on a throughput fee.

For the minimum 10 million gallon per day amount, Hydro Bahamas plans to charge $4.85 per 1,000 gallons, which is below the $6.30 per 1,000 gallons that the Water & Sewerage Corporation currently pays. If the Corporation uses more than the minimum amount, the water becomes cheaper the more it purchases, with the price above the minimum coming down to $2.85 per 1,000 gallons. Prices will be tied to the US consumer price index.

According to the documents obtained by The Tribune, Hydro Bahamas proposes to complete an Environmental Impact Assessment, feasibility study and all engineering for the first phase of the project within four months of having its Heads of Agreement approved by the Government.

In the first Phase of its project, the company to develop the Central Andros wellfield and install transmission lines between the wellfield to Coakley Town. A seven million gallon storage tank would also be built in Coakley Town. All water supplied by the company will be to the highest World Health Organisation (WHO) standards.

To provide redundancy capacity for its Androsia pipeline, Hydro Bahamas will also reassure the Government by providing for alternative tanker shipment of its freshwater supplies, constructing an offshore loading platform and two million gallon tank off Andros and an offloading facility in New Providence at Arawak Cay.

Transmission water mains would then be installed to take the delivered fresh water from Arawak Cay to pumping stations at Blue Hills and Winton. The company estimates this would be all completed within 11 months of the feasibility studies being completed.

The second phase will involve the laying of the 21-mile long Androsia pipeline between Coakley Town and Clifton Pier, which Hydro Bahamas estimates will take 24 months to complete once new feasibility studies have been done. These feasibility studies will take 12 months from the date the first phase is finished. The pipeline will be laid at a depth of up to 6,500 feet, using technology that has already helped lay deepwater pipelines at 10,000 feet in areas such as the Gulf of Mexico.

The Tribune understands that Hydro Bahamas has proposed penalties against itself if it fails to deliver, such as a $15,000 per day fine for every day it runs over the completion schedule. It has also propose that the penalty levied if it fails to deliver the stipulated amount of water be double the throughput fee it would charge the Water & Sewerage Corporation.

Hydro Bahamas is understood to be confident that the pipeline will pose no ecological threat to underwater life, while the offshore loading facility will not harm any reefs. Its business plan adds that wellfields, such as the one it proposes in central Andros, have had no negative impact on ecosystems, given that one has been located within four miles from the Lucayan National Park for the last 40 years.

larry smith

This project was vetoed long ago on technical and financial grounds. The Tribune article you posted above dates from 2004 and the claims it makes are based on hype from the investment backer - Hannes Babak.

HydroBahamas wanted a 99-lease on a vast area of central Andros - much of which is already part of our national park system. Development of the necessary well fields would require cutting miles of new roads and trenches as well as building power stations and other facilities in the wilderness.

The government already has troiuble pumping 5 million gallons a day from its existing Andros wellfield. HydroBahamas wanted to pump 15 mgd, which would have been a major technical achievement. And that does not even tough the engineering difficulties of running pipeline across the Tongue of the Ocean.

We came down on the side of RO - a tried and true technology that is easily scaleable.

The comments to this entry are closed.

Become a Fan

Welcome

  • Bahama Pundit is a group weblog that publishes the work of top Bahamian commentators. We welcome your feedback. You may link to this site but no material may be reproduced without permission.

Email this blog

Global Village

  • Global Voices Online - The world is talking. Are you listening?

Site Meter

Blog powered by Typepad
Member since 09/2005

Enter your email address:

Delivered by FeedBurner