Showing posts with label pratt truss. Show all posts
Showing posts with label pratt truss. Show all posts

Saturday, March 9, 2013

Huckleberry Hill Bridge, Avon, CT

Huckleberry Hill Bridge
It's the last snow of the season, and the time is running out to get some covered bridge pictures before the last snow. The snows we have gotten this winter have either been so light to not make the trip worthwhile, or so heavy that I couldn't drive there safely.

Come the perfect storm -- so to speak -- Friday. The heavy, wet snow had made us work from home, but the weather Saturday -- today -- would be so warm that traveling wouldn't be an issue. I only needed to find a bridge to get to before the snow melted, given I had to work in the morning.

I've found a map that collects together all the covered bridges in New England, state by state. The closest covered bridge that I haven't already been to, was this pedestrian bridge in Avon.


The Huckleberry Hill Bridge in Countryside Park was built in 1968 to cross the man-made pond and waterfall. At least one site claims it is a Town truss bridge, and I can see how they got that impression, because of the non-structural lattice. A look inside the portal clears it up, it's a Pratt truss bridge.


I haven't posted since September; I have some bridges on deck that I wasn't terribly happy with, but will post. This year, though -- I'm gonna abuse the heck out of that covered bridge map.

Thursday, July 19, 2012

Railroad bridges, Hooksett, NH

Baltimore truss railroad bridge
I wasn't going to write this picture up. There's nothing particularly historical about this bridge. I didn't even know this bridge existed.

I'm on vacation, and I'd made a promise to visit my parents graves in Concord, New Hampshire, at some point during my week off. My dad would never, ever pay a toll if he could avoid it, and particularly on I-93 between Manchester and Concord. He'd always take the back road, Route 3A, through Hooksett and Bow and into Concord, where we lived.

That's how we kids were brought up. So I was toodling along on 3A, which follows the Merrimack River, just casually looking over now and again because it's a beautiful river and it was my river growing up. Through the trees, I saw an old iron railroad bridge and figured I'd better stop by.

I didn't recognize the truss design; I looked it up when I got home and saw it was a "Baltimore truss". The railroad bridges here in Connecticut all seem to be Pratt truss, so that was new.


This closed-off railroad bridge crosses the Merrimack nearly parallel to the Baltimore truss bridge. This one appears to be a three span Pratt truss bridge with extra bracing. Or it could be a Warren truss. I don't know. The cool thing is that these bridges, right next to each other, were made using entirely different designs.

Lots of people seem to have photographed these bridges (add me to that list) and/or jumped from them, but I'm not able to find any information about them online.

Just... back roads New Hampshire, I guess.

Sunday, June 24, 2012

Gold Star Memorial Bridge, New London-Groton, CT

The Gold Star Memorial Bridge crossing the Thames
Connecticut sure loves cribbing names from the mother country. London -- sorry, New London -- on the Thames? Though maybe they hadn't actually been to the original London at all, since our version of the Thames is pronounced the way it's spelled -- rhymes with games -- and not the English way, tems.

Once one of the major whaling ports in America, New London continues its maritime traditions to this day. It is the home to the US Coast Guard Academy and Global Dynamics' Electric Boat shipyard, where the US nuclear submarine fleet is built and maintained. Busy ferries carry passengers across Long Island Sound to Long Island, Fisher's Island and Block Island.

The Gold Star Memorial Bridge is a pair of steel deck truss bridges that carry I-95 over the Thames. The first bridge was constructed in 1943, and the second thirty years later. Together, they comprise the largest structure in the state of Connecticut, and by far, the longest bridge.


The bridge is just massive. See how it looms behind those warehouses. It absolutely dominates the river.

Amtrack's Thames River Bridge
Paralleling the Goldstar is the nearly as impressive Thames River Bridge, which carries Amtrak over the river. It consists of four truss spans (Wikipedia calls them Warren truss, but they look like Parker truss to me -- Warren truss bridges have no vertical members) and a lifting section in the middle -- the two towers are a dead giveaway.

Pratt truss railroad bridge
Just before the Thames River Bridge, on the New London Side, is this small truss bridge that crosses a N/S set of tracks. Completely overshadowed by the Goldstar and the Thames River Bridge. Sitting there lonely and rusting.

New London is definitely worth a visit on its own merits; there's lots of remnants of its historic past, its roles in the Revolutionary War and its aftermath. It is one of the earlier settlements in New England. Forts guard the mouth of the Thames. There's even an old sailing ship moored in the harbor.

There's no special place to park for the bridge. It's huge. You'll see it. However, if you're looking for a distinctive place to visit whilst admiring the bridge, why not stop by the Old Town Mill?

Old Town Mill
This mill, built in 1650 by the town of New London's founder, John Winthrop Jr, stands today after having been rebuilt several times in its 350+ year history, including most notably after being torched by the traitorous Benedict Arnold during the British invasion of New London in 1781.


It is literally in the shadow of the bridge.