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lennart 389957 301 Building a wetland pond either
Building a wetland pond
The winter 2005/6 we build a wetland pond in a drainage channel that crosses our farmland. It was in a section which were piped in the late 60's by my father. It is funny - in the end of the 1800's the farmers in our area get paid by the municipality to drain their land and to build this channel. My father got subsidies to pipe it and now I got EG-subsidy to dig it up and build a wetland.:-\:-)
This picture is taken day two after they have build a working road.
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Start of digging work. The excavator is a brand new Daewoo 340 ECW owned by a contractor. My farm in the background.
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The top soil were mowed to the farmland next to the pond by two articulated haulers, one Volvo 5350 and one Volvo A20, both from the contractor.
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When the top soil were removed the clay beneth the topsoil were digged out and transported to a coming waste landfill area. The clay should work as a protection shield so waste water from the dump area could be collected and cleaned. As there were around 20 km to the dump area lorries were used, some days up to ten!
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After one week the hole looked like this. The excavator had great capacity and with less than 8 lorries the excavator had to wait between the loads. The calculation was to remove app. 8.000 cu mtrs. - area total 5000 sq mtrs, 3000 full depth and the rest built as a teracce.
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Due to heavy rainfall the top soil could not be planned out directly. It took only half an hour from rain started until the haulers couldn't move!
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The other half of the pond digged out. Here you can see the terrace. The working road were supposed to lay right over the pipes, and though there were no marks we managed to sucsess!
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Here a picture of the excavator loading a lorry. After the rainfall the lorries could not drive on the dump area with trailers, so now the excavator got much more waiting time.
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More sandy and lighter soils was rejected from the dump area, but some neighbours took the chance and fetched some material so they could fill up som "holes". Here is one neighbour with a Valtra 6850 and a Metsjö trailer.
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Another neighbour fetching materials with an old articulated hauler, a Volvo BM 860. In front a friends backhoe, a Hydrema. We had to correct some drainage and soakaways.
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Another pic of the 860 dumper.
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A study of my friend digging with the Hydrema backhoe.
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This is the same view as in the first picture after three weeks of work.
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It's time to start digging the pipes up....
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... and look how a skilled driver carefully uncovered the pipes! The pipes is not weak but with this big excavator it had not been any match to destroy them!
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The first pipes taken up and the both halves connected to each other and the drainage channel. From now they have to dig in water.
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The Daewoo excavator.
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"Deepsea" digging...;-)
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Due to the wet clay the road soon became a "wetland" itself!
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Another pic of "deepsee" digging. The depth is 4 m from ground, waterlevel here is app. 2 m below ground. Here they have been working for little more than a month.
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Here you can see the blue clay, the operator put the clay to dry until the next lorry comes.
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Loading another lorry..... Total when finished app. 1000 loads, 10.000 qu mtrs.
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Due to the wet clay and leaking lorrys the road became very slippery. To clean the road we used the slurry tank and flushed the road backwards. Functioned very well!
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Alternative use of telehandler - as road block! We didn't want any car to meet the tanker flusing the road.
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The last days of work we had some snow and the gound frooze. This was perfect to plan the soil around the pond. The authorities send out an inspector, and he had opinions about the terasse, so we had to put some clay back!
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