Sarah Mildred Long Bridge

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Sarah Mildred Long Bridge

Sarah Mildred Long Bridge seen from Kittery, ME.
Official name	Sarah Mildred Long Bridge
Carries	US 1 Bypass
Crosses	Piscataqua River
Locale	Porthsmouth, NH and Kittery, ME
Maintained by	Maine-New Hampshire Interstate Bridge Authority
ID number	021702510010800[1]
Design	Steel Truss Lift Bridge
Total length	854.7 m (2,804 ft)
Width	9.1 m (29.9 ft)
Vertical clearance	5.09 m (16.7 ft)
Clearance below	41 m (134.5 ft) (Lift span open)
AADT	14900 (1990)
Opening date	1940
Maps and aerial photos Street map from Google Maps or Yahoo! Maps Topographic map from TopoZone Aerial image or topographic map from TerraServer-USA Satellite image from Google Maps or Microsoft Virtual Earth

The Sarah Mildred Long Bridge is a lift bridge that carries the US 1 Bypass over the Piscataqua River between Portsmouth, New Hampshire and Kittery, Maine. The bridge is a double deck truss bridge, with the US 1 Bypass road deck above and a railroad bed below.

Interestingly, the bridge actually features two separate movable spans. While the main lift span and its towers are the obvious primary moving feature, the second moving span is only apparent to water and rail traffic. On the north side of the bridge, the first non-trussed section of rail bed actually lifts up and moves south as a retractable bridge, coming to rest on top of the rail tracks inside the truss. This creates a waterway large enough for most recreational boats to pass through without the need for interruption of automobile traffic on the bridge.

Contents 1 History 2 Naming 3 Photographs 4 See also 5 References 6 External links

[edit] History

Completed in 1940, the bridge is the second to carry motor vehicle traffic between Maine and New Hampshire at Portsmouth, and replaced a river crossing dating from 1822.^[2] The bridge was the direct result of the work of the Maine-New Hampshire Interstate Bridge Authority, which had been formed in 1937. The major goal of the bridge project was to relive congestion in downtown Portsmouth and Kittery, where US 1 crossed the river via the Memorial Bridge, which had opened in 1923.

From 1960 until 1972, the bridge, along with the US 1 Bypass north of the Portsmouth Circle, filled a gap in Interstate 95, which had been designated along both the New Hampshire Turnpike and the Maine Turnpike. Although most of the Bypass is four lanes wide, the bridge itself has only has a two-lane roadbed, and combined with being a drawbridge placed the bridge far below Interstate highway standards. The turnpikes, and therefore I-95 in the two states, did not directly connect until the opening of the Piscataqua River Bridge and the extensions of I-95 leading to it in the early 1970s.

[edit] Naming

For many years, the bridge was simply known as the "Maine-New Hampshire (Interstate) Bridge". In 1987, the bridge was renamed to honor Sarah M. Long, who had been an employee of the Maine-New Hampshire Interstate Bridge Authority for 50 years. Starting with the agency in 1937 when the Authority was created, Ms. Long filled a number of positions, from secretary to executive director.^[3]

Due to its location in Portsmouth harbor between the Memorial Bridge and the Piscataqua River Bridge, the Sarah Mildred Long Bridge is sometimes simply referred to as "the middle bridge"

[edit] Photographs

[edit] See also

• U.S. Route 1 Bypass (Portsmouth, New Hampshire)

[edit] References

[edit] External links

• gencourt.state.nh.us Legislation outlining the formation of the Maine-New Hampshire Interstate Bridge Authority.
• massroads.com More pictures of the bridge, including the movable rail section in the closed position.

Bridges of the Piscataqua River
Upstream Piscataqua River Bridge	Sarah Mildred Long Bridge	Downstream Memorial Bridge