Unfortunately, my camera broke shortly after the previous blog was posted (end of June), so many parts of the final construction went without photographs. Luckily, however, our generous Rotary Club partners and various Peace Corps Volunteers who came on site for visits allowed me to put a memory card into their cameras, and I was able to come away with these.
Enjoy!
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We hope this is the FINAL CLEANING we ever have to do of our 40,000 liter water storage tank.
From now on, clean water only will be held in this tank. This is except, of course, during times when we have major, yet-to-be repaired leaks in the village and we must bypass the new filters in order to meet volume demands of the community. This has happened about once a week since the filters have been functional (for approximately 6 weeks now), but we hope to install a bypass line from the roughing filter directly into the tank in the near future so the tank is never this dirty again.
Turaganikoro demonstrates just how muddy our old water could be (just in case you couldn't tell from previous pictures and entries).
The muddy residue left on our bodies after jumping inside the previously-dirty tank.
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FINAL TOUCH-UPS FOR THE STRUCTURE.
Collecting gravel to use for a cement platform underneath the particle filters in the appropriate way: from a river bed that crosses into our Mataqali (village family clan) land.
And perhaps a more questionable gravel collection method...
That's a lot of gravel.
Once we finished building a box frame and filling it with rocks, we hand mixed cement from the gravel we collected (see above) and sand from the beach to cover the top and make a smooth surface. Working with cement is truly an under-appreciated art.
Inserting a section of 3"x10" Vesi (very hard wood) to serve as a barrier between the Sky Hydrants and the cement. Later we drilled steel rods in to hold them in place.
I'm not sure how we managed to avoid everyone signing their names sloppily in the cement foot, but in the end, the village guys let me carve in the month and year as our only permanent stamp on the structure.
Our Carpenter had freedom to design whatever railings he wanted for safety purposes on the tank platform. We would have been happy with simple rope, but I like his solution much better now that it's finished.
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ROUGHING FILTER CONSTRUCTION: Filling the green tank with rocks and sand to filter large particles out before the water reaches our Sky Hydrant, .01 Micron filters down below.
A LOT of sand. I shoveled at least half of it myself, but I won't kid myself into thinking that I did most of the work: the boys had to carry it up from the beach to a suitable parking spot and load it into a truck!
Getting the gravel and sand up onto the tank platform.
Our Rotary Club engineer, Jeff, designed this interesting "manifold" piping system to filter the water into the roughing tank in such a way as to reduce channel-producing jets of water through the sand (thus possibly disrupting filtration).
Steve (the other Rotary Club partner guy) and some of the boys gluing together the manifold.
Manifold in place inside the green tank.
Meanwhile, down on the ground, I was supervising the sifting of our beach sand to ensure some sort of uniformity in size. To do this, the boys and I designed a rough screen from spare 2"x4"s and some crab-trapping mesh wire overlapped several times.
Then, we spent the next couple hours sifting bags of sand, loading the new product into sacks, and hoisting them up onto the tank for the pour-into-green-tank crew.
Once all raw materials were in place inside the now-insanely-heavy green tank, we framed the roof to protect our creation from weather and animals.
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FINAL LUNCH AT THE TANK FOR THE WORK CREW.
Jeff and Steve were nice enough to drive down to the village so the ladies wouldn't have to carry their heavy pots and dishes all the way up to the tank to serve us.
A pretty standard meal: Waci vaka Lolo (boiled Taro Root leaves in coconut milk) with fish and boiled Dalo (Taro Root) and Uvi (Wild Yam).
Yummy. Those lunches are what I'll miss most about the construction phase of this project. Without a doubt.
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FINISHED PRODUCT.
Final piping scheme.
I would try to explain it all here, but it is really as confusing as it looks. You have to be here in person, then I can show you. So come visit, okay?!
Final product. Roof on. Fence in place. Gate constructed.
Jimi, our oldest Village Foreman, shows off the bottled-water-quality clarity (!) of our new, clean, water.
Ilimo, the village leader of the project, drinks clean water straight from the check valve.
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NOTES ON THE WATER SITUATION AS IT STANDS NOW
(a.k.a. on-going challenges)
So, approximately 6 weeks after construction I wish I could write that everything has been peachy with the new system. But, unfortunately, this is a work-in-progress.
Two Sky Hydrant filters can produce 40 cubic meters of water in a 24-hour period under ideal conditions (meaning zero head loss and friction between the filter output and the pipelines, and when they are freshly cleaned). Our Roughing Filter (the gravel and sand inside that elevated green tank) was intended to ensure that we could go at least a week between manual cleanings of the Sky Hydrants (by trapping potentially-clogging particles). We are learning now, however, that there are some important steps we might have missed in the ideal design of a Roughing Filter. Hopefully we (Rotary Guys and I) will be able to adapt what we have already constructed to make our now mandatory every-two-day cleanings less frequent. That way, I will feel more confident that the project is fully sustainable.
Furthermore, the village usage (as we know from all that elaborate testing I did with the Village Water Committee back in October-December 2009) is, on average, 27 cubic meters a day. Additionally, last year we were experiencing almost 800% additional leakage (which we know because we observed water level drops in the middle of the night when inflow pipes were removed and nobody in the village was using any water). After extensive leakage repair by Ilimo and myself (yes, I am basically a plumber now), we have reduced that number to about 50%. That means, on average, our community is using about 42 cubic meters of water a day. The filters produce 38 when they are clean (which I mentioned above is not all the time due to hiccups in our Roughing Filter scheme and the distance of the filters to make daily manual cleanings a realistic option).
Furthermore, this is a village that has approximately 3-6 km of piping ranging from the filter construction site and all the houses connected to our source. This system was first begun 15 years ago when the resevoir tank was built. Since then, each individual family has shouldered the cost of their own connections and piping. This means, that corners were cut. In almost every case, PVC (white plastic) pipeline is directly connected to (black rubber) Poltane pipeline through parts such as threaded T's and Elbows. Unfortunately, Poltane must be connected to PVC through galvanized fittings in order to create a true seal. Now that major leaks have been repaired, and consequently the water pressure has drastically increased throughout the village, each one of these fittings is starting to leak, and repairs are both costly and time consuming (imagine replacing an existing T that must be screwed into three buried lines... it's galvanized socket and union-central around here). To make matters worse, many of the lines are very shallowly dug (out of shear laziness), and because their locations are unmarked, there are frequent accidents with digging forks and cane knives. This means, our line of literally-misfit pipe connections is also riddled with punctured pipeline that has been "repaired" with tubing (essentially black rubber strips wound around the line and tied off).
If you followed that at all (and I don't blame you at all if you didn't, because I'm not exactly proficient in technical, english, plumbing language), you might guess that it's a seriously uphill battle at this point. Fixing our leakage beyond 50% of usage (thus ensuring that we always have enough water in the village) seems impossible because every time we fix something, two something-else's pop up.
That all said, this is exactly why Peace Corps is a two-year program. We understand that change (and especially behavior-change like water conservation) doesn't happen in a day, and so we are committed to the long-haul to ensure sustainability of our projects. I'm not pretending like I don't want to tear my hair out, though, knowing that this project is going to continue to consume my service for the remainder of my time here! When all is over, though, I will have something pretty amazing to show for all my hard work--and my community will have clean, safe, and (hopefully) plentiful water for generations to come.
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As always, I thank you for visiting my blog.
Missing everyone lots.
xx
Milika
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