ID this type of farm BRIDGE, please

Nifty bridge, actually several bridges strung together. Is it possible they put it so high to allow for raising the level of the lake? The COE constructed two flood control dams (3 impounds) in my county in PA. They later raised one dam/impound to store additional water for downstream nuclear plants cooling.

Here is "my" niftiest bridge:

There's a stone arch bridge across the river entering Merida, Spain, that was constructed by the Romans and is still carrying 2-lane highway traffic, including trucks. It's been a while since I was there, but I don't think it's quite as long as yours. I also remember that one arch looked like it had collapsed and been repaired. The later stone work was not as high quality as the Roman masonry.

That is a nifty bridge indeed! I've never heard of stone bridge being filled with concrete, but then again, I don't know much of anything on that subject. I'm from PA so I wanted to see were it was and found these pics:

You are obviously in misc.rural, FarmI has been posting in rec.gardens for many years and is a valuable source of information to us.

I don't think it's possible for it to rise anywhere near that high... on second look at the pictures I did just notice the high water marks that do go very high! I sometimes go boating there (there is a public boat ramp at the south end) and I'll have to take notice how much room is under the bridge from its highest water marks.

It probably fell during an earthquake. Barring that Keystone arches are some of the strongest structures you can build with stone.

The Rockville bridge's claim to fame is its length/mass. But the span of the individual arches is short, relative to stone arch bridges that are considered engineering accomplishments.

Imagine the task of taking it down. I doubt they could just blow it up because of all the sediment that would put into the river - and ultimately into the Chesapeake Bay.

"Farm1" (Fran) has been posting to misc.rural a few months short of 10 years.

Kind of a sedimental journey.

Steve southiowa

Are you really stupid or are you just trying to appear that way?

I've also been posting in misc.rural for years. But I've not noticed this 'wallace' poster there before which is why I had a chuckle at the troll comment (who's the troll: the one who's posted for years or a suddenly new name?). Wallace can't be very 'rural' if s/he has not seen the way irrigation is used as per the pic in the cite I gave. Mind you many of the posters in misc.rural aren't what I'd call 'rural'.

God! Is it really that long? I'm suddenly feeling even older than I normally do! You really know how to depress a girl Ann.

I checked by doing a lookup at groups.google.com; iirc the first post they have is Aug, 2000. Didn't look up my first post but it was in early

To now go completely off topic, do you know how much damage the volcanic ash did where Janet lives?

There you go, as expected. Your picture does not match the picture from the OP. Height of water intake and outgo matters when siphoning.

Siphon tubes have pretty much disappeared in my part of the U.S. It's just too much work and the land has to be fairly flat. We had a few when I was a kid. One thing I remember was the varmints digging and causing leaks in the ditch. I had relatives in Idaho who used a lot of siphon tubes. I think the water came from the Snake River. They had some tubes as large as 4" diameter for pasture irrigation. Pivot irrigation is by far the most common. Some farmers are trying subsurface irrigation. Gated pipe is still fairly common.

Siphon tubes was how we irrigated when I was a kid. I think the tubes were bigger then 4" tho. Or it could have been just that I was pretty little then.

Well it's nice to know that you at least know that they existed. :-)) They did take a lot of work but they were also low cost and thus had some advantages over pumps et al.