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Home , Ambassador Bridge, Mackinac Bridge, Ralph Modjeski

MOUNT HOPE BRIDGE

Rhode Island

This bridge, designed by Robinson and Steinman, crosses Mt. Hope Bay , an arm of Narragansett Bay, between Providence and Newport with a main span of 1200 ft, side spans of 504 ft and a roadway width of 27 ft. It was opened to traffic on October 24, 1929.

MtTRope Bridge —___; *®^&£!*«t Bristol HT. , =7lf*M DELAWARE MEMORIAL BRIDGE Wilmington, DE

The Delaware Memorial Bridge was opened to traffic on August 15,1951. It has a main suspension span of 2,150 ft and side spans of 750 ft, for a total length of structure of 10,765 ft. The bridge was originally designed for six lanes of traffic but when bids came in above the estimate, the bridge was redesigned to carry only four lanes of traffic. With the opening of the New Jersey Turnpike, traffic on the bridge soon reached capacity, and a parallel bridge with similar dimensions was built to provide four lanes of traffic in each direction. The original bridge was designed by Howard, Needles, Tammen & Bergendoff with O.H.Ammann as consultant. The second bridge was also designed by HNTB with E.Lionel Pavlo as consultant.

The

World's

LongesL

Twin

Suspension

Bridge BENJAMIN FRANKLIN

BRIDGE The crosses the Delaware River between , PA and Camden, NJ. Its total length is 1.8 miles. The main span between the 385 ft high towers is 1,750 ft and provides a clearance above water of 135 ft. Originally, the bridge carried six traffic lanes, two high-speed railroad tracks and one trolley line. Now it carries seven traffic lanes and two tracks for a commuter line. Completed in 1926, the bridge was designed by .

SEP AD U.S.POSTAG. NATIONAL STAMP -•Jfl8M~03 M ETEA EXHIBITION PB,I0923o G

David Brown, 20 Worcester St Cambridge 3, Mass. UNHID STATES AIRMAIL FIRST FLIGrTi

Miss. Joyce L. Bell. 24 West Market St., Mount Union, Penna. EXPERIMENTAL PICKUP ROUTER

DELAWARE

RIVER

BRIDGE

BENJAMIN FRANKLIN BRIDGE WALT WHITMAN

BRIDGE

The Walt Whitman Bridge crosses the Delaware River south of Philadelphia. It has a main span of 2000 ft and side spans of 770 ft. Design by Amraann & Whitney / Modjeski & Masters.

RIMCR MID STEEL GROUJinG TOGETHER

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-^g.v •B| U.S.PDSTHGE JC 1

FRIENDS SELECT SCHOOL 1 16th NORTH OF CHERRY ST. PHILADELPHIA, PA. MAY 24, 25, 26*1957 Windsor

USA Canada

. .„,__. — -j^jj-'jj'AT_ NOTIFY . ' YOUR CORRESPONDENTS j OF CHANGE INTERNATIONAL GOOD OF ADDRESS£ WILL JUBILEE

by "5 K American and Canadian § Legions

On Ambassador Bridge c_

June 30, 1934

The Ambassador Bridge across the Length of main span 1850 ft connects Detroit, , with Windsor, Length of Detroit side span 973 ft (Canada), The bridge was built by the McClintic - Length of Windsor side span 817 ft Marshall Company of , PA. At the time of its Length of Detroit approach viaduct 1431 ft completion and opening to traffic on November 11, Length of Windsor approach viaduct 1419 ft 1929, the Ambassador Bridge was the longest Total length abutment to abutment 6490 ft in the world. It carries four traffic Width of roadway 47 ft lanes and one sidewalk. Clear height at mid span 152 ft

DETROIT-WINDSOR F INTERNATIONAL E

DOM I ESTI' Al :

•WJlUJg.

AMBASSADOR BRIDGE Linking Detroit, U.S.A. Windsor, Canada

MOTOR CITY STAMP AND COVER CLUB

L DETROIT INTERNATIONAL BRIDGE COMPANY

v .ife, -V R O. BOX 32666 (Datloit, CAttcktaan 48232

AMBASSADOR BRIDGE

ST. LAWRENCE SEAWAY

WAYiiE8mnipSoa__TY

THE O.W. WESCOTT II SERVICING MAIL TO <$'¥ £ THE GREAT LAKES FLEET AT DETROIT MICHIGAN, PART Or THE ST. LAWRENCE SEAWAY.

60^ Anniversary of Ambassador Bridge - Cachet shows picture of CINCINNATI - COVINGTON BRIDGE

This bridge, built by John A. Roebling, spans the Ohio River between Cincinnati, Ohio, and Covington, Kentucky. It was opened on December 1, 1866, and with a main span of 1,057 feet it was the biggest bridge in the world. It served as model for the .

Suspension Bridge, Covington, Ky

1834 COMMEMORATING THE ONE HUNDREDTH ANNIVERSARY OF THE INCORPORATION OF THE CITY OF COVINGTON, KENTUCKY

ANIEL S B2r^HElM JR 2629 NORTH 291H ST PrflUDE-.PHIJL Pfl Royal Gorge Bridge

Canon City, Colorado

The Royal Gorge Bridge is considered the world's highest suspension bridge at 1,053 ft above the Arkansas River. The unstiffened bridge was designed and built by George F.Cole in 1929 with a main span of 880 ft, side spans of 130 and 190 ft, and a total length of 1,200 ft. The photograph shows the bridge after extensive rehabilitation in 1985, with the added wind cable stiffening system. 1,200' —I NORTH

ARKANSAS RIVER ROYAL GORGE SUSPENSION BRIDGE

P& signed by D.3-J)/einmctn Com pie feci If5<3

Bui/r by American Bridge. Piv. U.S.5. and Merritf-Chapman $ Jcott Corp. Main span 3,600ft - j/de jpans 1,600ft - Total length 17,9/3 fl Mackinac Straits Bridge

^7'U«.j._^_ 24

CROSS SECTION, SUSPENDED SPAN Mackinac Straits Bridge

THE BRIDGE AT MACKINAC By D. B. Steinman / In the land of Hiawatha, / Where the white man gazed with awe At a paradise divided By the Straits of Mackinac — Men are dredging, drilling, blasting/ Battling tides around the clock, / Through the depths of icy water, / Driving caissons down to rock/ Fleets of freighters bring their jtqrgoes / From the forges and the kilns; / THE MACKINAC BRIDGE State of Michigan Stone and steel — ten thousand barge loads Spanning the Straits of Mackinac, with southern terminals From the quarries, m'mesKxnd mills/ at Mackinaw City and northern terminal at St. Ignace. Designed by Dr. D. B. Steinman, an internationally eminent Now the towers, mounting skyware, bridge engineer, this bridge is the world's largest and one of the most beautiful. Located in one of the country's most Reach the heights of airy space/ beautiful areas. This poem by Dr. Steinman is a fitting tribute to the courage and faith of those who made possible Hear the rivet-hammer/ringing/ The Bridge at Mackinac... Joining steel in stre/gth and/grace. "In the land of Hiawatha, Where the white man gazed with awe At a paradise divided High above the swir/tng currents. By the Straits of Mackinac" Parabolic strands are stpdng; From the cables, packed with power. Wonder-spans of steel are hung. Generations dreamed/ihe crossing \ Doubters fhook tKeir hepofcrin scorn. Brave men vowed thai ihey would build it From their faith a bridge was bgp- iTher* It spans the

!__• Mackinac Straits Bridge

MACKINAC

BRIDGE OPENED TO TRAFFIC IN NOVEMBER. 19.7 AND FORM­ ALLY DEDICATED IN JUNE, 1953, THE- SUSPENSION BRIDGE ACROSS THE STRAITS OF MACKINAC CON­ NECTS THE TOWN Of ST IGNACE, OH MICHIGAN'S UPPER PENINSULA.WITH MACKINAW CITY ON THE LOWE-R PENINSULA, FORMERLY LINKED ONLY BY A TEDIOUS . RUNNING TIME OF THE FERRY WAS 53MIN- UTES BUT WAITING TIME AND WEATHER DELAYS OFTEN ADDED SEVERAL HOURS TO CROSSING TIME. AUTOS NOW TRAVERSE THE 5-MILE BRIDGE IN 10 MINUTES Mackinac Straits Bridge

UNITEDSTATES POSTAGE FIG. 1. Strands in uncompacted cable (immediately below) and strand shoes in anchorage (bottom) are arranged as shown.

Strand 38 (backstay span only)

MACKINAC OLIVPI H. MACKAY STRAITS BRIDGE P. 0. Boy 1405 Oakland 4, Calif, 1 12 I 3l4 STRANDS IN UNCOMPACTED CABLE

00000

0 0 0 00

000 BBS

0 0 0 0 0 0 0

0 0 0 0 0 0 MACKINAC 0 0 0 0 0

0 0 0 0 STRAND SHOES

ZTef f f Qr**» vt/l*~

BRIDGE The Mackinac Bridge

TWENTIETH *#£&&* m ANNIVFRSARIFS ."-*J5r*S

/o JUN 25 £. fe 3-AM §

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MACKINAC 3 U NITE D STATES POSTAGE

mm

FIRST DP

um^yuyioq THE OPENING OF THE MACKINAC STRAITS BRIDGE FIRST DAY COVER Mr. George L. ..rsrm III 2 Louigbura: Square Boston b, Mass.

Mackinac Bridge

loruyiAsnq THE OPENING OF THE MACKINAC STRAITS BRIDGE FIRST DAY COVER

«__>&-.lV i-_?L**_ ./

FIRST DAY

Hugh Hoffman 13 Hillview Drive Scarsdale, N. Y.

CACHE T C/iAfr STATE ,_/r'"TS&. MICHIGAN

MACKINAC fik.k BRIDGE

OPEN NOV , ,957 A^KFp&S?™"aaT.s^ Total length including approaches (5 mMHJHJI^gK^v 26,444 Ft. Length of suspension span (with anchorages. ""'. 8,614 Ft. Length of main span 3,800 Ft. Height of main tower above water 552 Ft. Piers below water 206 Ft. Minimum clearance 148 Ft. Cables 24V." diameter, 12,580 wires in each cable. Total length of cable wire 42,000 Miles Total cost $100,000,000. G. MENNEN WILLIAMS GOVERNOR Or MICHIGAN LAN SI NO

Michigan's Mackinac Bridge

FIRST MY OF ISSUE %. WORLD'S GREATEST Dedication June 2b, 27, 26, 1958 MACKINAC BRIDGE AUTHORITY Kr.T.STAHL. *>«_. PRENTISS M. BROWN, CHAIRMAN MRS. CHARLES T. FISHER, JR. JOHN C. MACKIE MArAANN 4 vm.TtfM MEAD L. BRICKER WILLIAM J. COCHRAN GEORGE A. OSBORN MURRAY D. VAN WAGONER FIRST DA Y ISSUE NE.VJ lOftt, VAX W

<_W^5t>

Michigan's Mackinac Bridge] A small souvenir of your help in

the building of the Mackinac Bridge

by the people of Michigan. 5

Governor •

MACKINAC STRAITS BRIDGE

1958 DEDICATION

FIRST DAY OF ISSUE

Facts and figures: Location: Straits of Mackinac—between Mackinaw City and St. Ignace, Michigan Erection of Steel Superstructure Began on July 2, 1955 Opened to Traffic, November 1, 1957 Total Length of Steel Superstructure 19,205 ft. Total Length of Suspension Bridge 8,614 ft. Length of Main Span 3,800 ft. Length of North Approach (Steel) 4,310 ft. Length of South Approach (Steel) 6,281 ft. Total Length of Bridge and All Approaches 26,444 ft. Height of Main Towers Above Water 552 ft. Depth of Tower Piers Below Water 206 ft. The bridge provides a minimum clear height at center of main span of 148 ft.—sufficient to allow passage of the largest ships. Width of Roadway 48 ft. Number of Main Cables—2 Diameter of Main Cables 24 V_ inches Total Estimated Weight of Superstructure 67,300 tons Cost $96,400,033.33 Mackinac Straits Bridge

MACKINAC

STRAITS . ; 9-AM <-,, V?- I 9s 8 njj IBRIDGE V/1 .,rv\>/

It is the longest suspension bridge in trie world, between anchorages—that is, between the ends of the cables that hold up the roadway. This distance I is 8,614 feet, or 1.64 miles. It crosses Lakes Huron and Michigan, four miles of water, to connect the main part of Michigan and its forest-covered northern peninsula. The Bridge is five miles in length. Its suspension span is the second largest in the world— 3,800 feet. The cables are anchored at each end in concrete foundations each bigger than a football field. About 100 men working under Dr. David B. Steinman designed the Mackinac Bridge. It cost HUGO IFFERT more than any other bridge thus far—$99,800,000. 73 CHESTNUT STREET EMERSON, N. J.

Center Span THE MACKINAC BRIOGE The center span of a five-mile bridge being constructed across the Straits of Mackinac, connecting Michigan's two great peninsulas at Mackinaw City on the lower, and St. Ignace on the upper. Designed by Dr. D. B. Steinman, this bridge has been engineered to withstand mony times the recorded stresses of ice pressure, wind velocity, gravity and so forth. Overall length of bridge is 5 miles, has four lanes for traffic. Center span 3800 feet long between two 565-foot towers, water clearance of 150 feet. Construction started in May 1954, scheduled for opening late in 1957.

MACKINAC B RI DGE

fl*as •••- Tacoma Narrows Bridge

Washington Toll £ridge Authority. Charles E. Andrew, Chief Engineer.

3ric/qe acrojj Pudge/ Jound/ built on foundation^ of structure which collapsed under wind act/on in 1^4-0,

Mainjpan 2,300ff • J id6 jpoin5 I, I oof/. 7" Completed l?50. Totterj, and suspended structure &y 3 el hi eh em _5te&l Corp.

Cables by J. A. rZo&6lingj Jons Corp.

Jtamp piclures old Niagara tc'aitk/ay Suspension 3ridae.