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Bridges & Viaducts Topic

 
The Golden Gate Marker image, Touch for more information
By Joseph Alvarado, November 14, 2022
The Golden Gate Marker
201 California, San Francisco City and County, San Francisco, Lincoln Park — The Golden GateDeep Sea Geology Exposed
Near El Camino Del Mar near Seal Rock Drive.
The scene before you is the result of a tectonic collision that went on for millions of years, beginning in the Jurassic period – about 200 million years ago – and ending here about 15 million years ago. During that time the Pacific seafloor . . . Map (db m210703) HM
202 California, San Francisco City and County, San Francisco, Mission Bay — Peter R. Maloney (4th Street) Bridge
On 4th Street, on the right when traveling north.
Operation of the Fourth Street Bridge The Peter R. Maloney Bridge, otherwise known as the Fourth Street Bridge, opened in 1917 after a two-year period of construction. Joseph B. Strauss, the leading designer of bascule bridges in the . . . Map (db m162761) HM
203 California, San Francisco City and County, San Francisco, Presidio of San Francisco — A Bathtub for the South Tower
Near Coastal Trail.
To reach the site of the south tower foundation, workers constructed a temporary roadway on a timber access trestle, or wharf, from the San Francisco shore. The dangers of the exposed location soon became apparent in 1933, when a freighter collided . . . Map (db m176570) HM
204 California, San Francisco City and County, San Francisco, Presidio of San Francisco — A Lasting Monument
Near Coastal Trail.
When asked how long the Golden Gate Bridge would last, Chief Engineer Joseph Strauss replied, "Forever." The Bridge was designed to be strong and durable, but to make it a lasting monument requires continual maintenance and improvements. Since . . . Map (db m176575) HM
205 California, San Francisco City and County, San Francisco, Presidio of San Francisco — All in a Day's Work
Near Coastal Trail.
Bridge construction began in 1933, in the midst of the Great Depression. The unemployment rate was 25 percent, and jobs were much sought after. With the exception of highly specialized jobs, the Bridge was built by local labor. Besides the pay, the . . . Map (db m176574) HM
206 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Art Deco on a Grand Scale
Near Coastal Trail.
The Golden Gate Bridge is one of the world’s largest examples of the Art Deco style. Named for the Exposition Internationale des Arts Décoratifs et Industriels Modernes, held in Paris in 1925, the Art Deco style was used by architect Irving . . . Map (db m176578) HM
207 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Battery Lancaster
Near Coastal Trail.
Defending the Golden Gate Battery Lancaster's mission was unique among the many artillery installations on this bluff. From 1900 through World War I, Lancaster's three guns offered the only artillery coverage from the south for the . . . Map (db m176564) HM
208 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Bridging the Gate — the Beginning
Near Coastal Trail.
San Francisco grew rapidly in the early 1900s, but the mile-wide Golden Gate Strait limited access and development to the north. Traveling north to Marin County and the Redwood Empire beyond required a lengthy trip by ferryboat. In 1923, popular . . . Map (db m176567) HM
209 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Engineering the Design
Near Coastal Trail.
In 1921, engineer Joseph B. Strauss submitted a design for a bridge that would cross the Golden Gate Strait — a hybrid bridge with a suspension span supported at each end by cantilever trusses. By 1929, consulting engineers Leon S. Moisseiff and . . . Map (db m176569) HM
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210 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Facts & Figures About the Bridge
Near Coastal Trail.
Quick Facts on the Golden Gate Bridge Period of construction: Just over four years. Construction commenced on January 5, 1933 and the Bridge was open to vehicular traffic on May 29, 1937. Cost: $35 million dollars in the 1930’s, . . . Map (db m176583) HM
211 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Fort Point Arch
Near Coastal Trail.
The curve of an arch experiences pushing forces, or compression. At the south (San Francisco) end of the suspension bridge, a large steel arch carries the roadway deck over Fort Point, the brick fort below. Fort Point was completed in . . . Map (db m176563) HM
212 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Hanging the Roadway Deck
On Coastal Trail.
The steel trusses on each side of the roadway deck structure along its length can be identified by their triangles. The trusses support beams holding up the roadway and stiffen the deck structure against wind. They span 50 feet (15 meters) between . . . Map (db m176573) HM
213 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Joseph Strauss Legacy Circle
Near Lincoln Boulevard.
The Strauss Circle commemorates the 75th anniversary of the Golden Gate Bridge and honors the legacy of Joseph B. Strauss, its first chief engineer.Map (db m195724) HM
214 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Making the Impossible, Possible: The Story of the Golden Gate Bridge
Near Coastal Trail.
Until 10,000 years ago, the sea level was over 300 ft (100 m) lower than today. An ancient river cut a canyon here, forming the Golden Gate Strait. When a warmer climate ended the Ice Age, the sea level rose and flooded the interior valley to form . . . Map (db m176566) HM
215 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Men of Vision
Joseph Strauss dreamed of a golden bridge spanning San Francisco Bay. But people opposed it fearing it would never survive the strong tides, it would lower property values, it would ruin the view. More than 2,000 lawsuits were filed to stop . . . Map (db m195723) HM
216 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Resisting the Twisting
Near U.S. 101 at Lincoln Boulevard.
Ever since the modern suspension bridge was invented in the early 1800s, one of the biggest challenges engineers have faced is preventing these flexible structures from moving too much in the wind. A storm on December 1, 1951, caused the Golden . . . Map (db m131193) HM
217 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Spinning the Main Cables
Near Coastal Trail.
By mid-1935, the north and south towers stood ready to support the two main cables. Each of the cables measured a little over 3 feet (1 meter) in diameter and weighed 12,000 tons. They were far too heavy to carry across the Golden Gate Strait on . . . Map (db m176572) HM
218 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Steel, Fog, Salt, Rust, and Paint
Near Coastal Trail.
Only rarely must the Golden Gate Bridge withstand earthquakes or strong wind, but everyday it must fight another threat: corrosion of the steel which creates a byproduct called rust. Steel is an alloy comprised principally of iron along with . . . Map (db m176579) HM
219 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Tall and Strong
Near Coastal Trail.
Tallest Bridge Towers The Golden Gate Bridge not only set the record for longest bridge span when completed in 1937, it also had the tallest towers. Honeycomb Legs — Strong, but Light This innovation introduced by the Golden Gate . . . Map (db m176580) HM
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220 California, San Francisco City and County, San Francisco, Presidio of San Francisco — The Golden Gate Bridge
Near Lincoln Boulevard.
The side view (elevation view) of the Golden Gate Bridge shown here in bronze is 1:2,000: the actual bridge is 2,000 times larger. The distance between the actual towers is 4,200 feet (1,280 m), which set the world record for the longest span when . . . Map (db m195726) HM
221 California, San Francisco City and County, San Francisco, Presidio of San Francisco — The Golden Gate Bridge: Vision, Genius and Expert Care
Near Lincoln Boulevard west of Chrissy Field Avenue.
"The Golden Gate!" Army explorer John Charles Fremont named the entrance to San Francisco Bay in 1846. His Majesty Emperor Joshua Abraham Norton decreed in 1869 a bridge be built “…across the Golden Gate to Sausalito Ridge.” Work finally began 64 . . . Map (db m31685) HM
222 California, San Francisco City and County, San Francisco, Presidio of San Francisco — The PG&E Tower
On Golden Gate Bridge, on the right when traveling north.
This tower has been named for Pacific Gas and Electric Company in appreciation of its gift of light to the Golden Gate Bridge. PG&E made the largest single private contribution toward the permanent lightning of the twin towers, installed for the . . . Map (db m243378) HM
223 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Types of Bridges
Near Coastal Trail.
Suspension bridges are the longest-spanning bridges in the world. Prior to the record set by the Golden Gate Bridge in 1937, 4,200 ft (1,280 m), the longest-spanning bridge in the world was the George Washington Bridge, with a span of 3,500 ft . . . Map (db m176582) HM
224 California, San Francisco City and County, San Francisco, Presidio of San Francisco — Working Under Water
Near Coastal Trail.
One of the greatest construction challenges took place underwater. The south tower was located more than 1,100 feet (335 meters) from the San Francisco shore. To build the south tower structures, divers played a critical role descending up to 110 . . . Map (db m176576) HM
225 California, San Francisco City and County, San Francisco, Presidio of San Francisco — World's Tallest Bridge Towers
Near Coastal Trail.
A long-span suspension bridge usually has tall towers. The height of the Bridge's towers directs the tensile (pulling) forces in the main cables upward, so that the cables can efficiently hold up the roadway deck. The 746-foot-tall . . . Map (db m176571) HM
226 California, San Francisco City and County, San Francisco, Rincon Hill — Klockars' Blacksmith Shop
On Folsom Street north of 1st Street, on the right when traveling east.
Beginning in the 1860s, foundries South of Market Street fabricated mining machinery, railroad cars, and ships. This 1912 machine shop is the last. Fred V. Wilbert forged fine tools here. Edwin A. Klockars (1898-1994), a native of Munsmo, Finland, . . . Map (db m110905) HM
227 California, San Francisco City and County, San Francisco, SoMa — Pause traveler and be greatful to Norton 1st
Near Minna Street.
Emperor of the United States and Protector of Mexico 1859-80, whose prophetic wisdom conceived and decreed the bridging of San Francisco Bay August 18 1869 Dedicated by E Clampus Vitus, Feb. 25, 1939 Map (db m241732) HM
228 California, San Francisco City and County, San Francisco, South Beach — The Bay Bridge
On The Embarcadero near Beale Street.
Begun in 1933 in the depths of the Depression, the San Francisco-Oakland Bay Bridge put hundreds of men to work on two six-hour shifts, morning and night, for three years and seven months, to finish two months ahead of schedule on November 12, . . . Map (db m92904) HM
229 California, San Francisco City and County, San Francisco, South Beach — The Francis "Lefty" O'Doul Third Street Bridge
Near Third Street south of Willie Mays Plaza.
The Francis Lefty O'Doul Third Street Bridge, City Landmark No. 194, was built in 1933. The Strauss Engineering Company, designers Of the Golden Gate Bridge, designed this heel trunnion type steel truss bascule bridge. The bridge is weighted at . . . Map (db m162763) HM
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230 California, San Francisco City and County, San Francisco, Treasure Island — SignalTom Loughlin — 2019 —
On Avenue of the Palms at 9th Street, on the left when traveling north on Avenue of the Palms.
Tom Loughlin’s sculpture repurposes steel girders and a light salvaged from the original East Span of the Bay Bridge which was opened in 1936., damaged in the 1989 Loma Prieta earthquake, and taken out of service in 2013. Demolition of the original . . . Map (db m210549) HM
231 California, San Francisco City and County, San Francisco, Yerba Buena Island — Defending the Bay for 150 Years
On Treasure Island Road north of Macalla Road, on the right when traveling north.
With a strategic location in the center of the San Francisco Bay opposite the Golden Gate, Yerba Buena Island has been home to three branches of the U.S. Military – the Army, Navy and Coast Guard. From 1867 to 1897 the Army used the island . . . Map (db m218468) HM
232 California, San Joaquin County, Clements — Mackville Road Bridge
On Mackville Road near East Jahant Road, on the left when traveling south.
County of San Joaquin Mackville Road Bridge Dedicated to the citizens of the Clements and Lockeford areas and San Joaquin County, January 1977 Board of Supervisors George L. Baker • Norman D. Shumway • Adrian C. Fondse • Clifford . . . Map (db m151208) HM
233 California, San Joaquin County, Tracy — Lincoln Highway1913 - 1928
On 11th Street (California Route 205) east of Cable Road, on the right when traveling west.
In the 1800's the United States was experiencing its industrial revolution. Inventors were running rampant. The new horseless carriage was the rage. America soon realized that the horse and buggy were a thing of the past. Bicyclists, having trouble . . . Map (db m230997) HM
234 California, San Mateo County, Burlingame — Eugene A. Doran Memorial Bridge1922 – 1959 — One-Half Mile South —
Near State Highway 280.
An officer for the Town of Hillsborough from April 1, 1956 until his untimely death on August 5, 1959, who made the supreme sacrifice at the hands of a criminal suspect whom he had apprehended.Map (db m18330) HM
235 California, San Mateo County, Half Moon Bay — First Concrete Bridge Erected in San Mateo Co1900
On Main Street, on the left when traveling south.
J. Debendetti Supervisor D. Bromfield & C. Tobey Jr. Engineers R.C. Mattingly & W. Heafey ContractorsMap (db m10713) HM
236 California, San Mateo County, Redwood City — A Feat of GravityThe Hetch Hetchy Regional Water System
After the 1906 earthquake and its resulting fires destroyed much of San Francisco, public support surged for a reliable water supply. This allowed San Francisco to look beyond the Bay Area to resolve the region’s growing need for reliable, . . . Map (db m202491) HM
237 California, San Mateo County, San Mateo — History of San Mateo’s Bridges
Near South Hart Clinton Drive.
In 1923, the cities of San Mateo, Burlingame, and Hillsborough began planning for a bridge to link the San Francisco Bay peninsula cities with East Bay and Central Valley communities. Even after the Dumbarton Bridge opened, in 1927, these . . . Map (db m28727) HM
238 California, San Mateo County, South San Francisco — Cut Stone Bridge
On Centennial Way Trail at Spruce Avenue, on the right when traveling north on Centennial Way Trail.
History The Cut Stone Bridge before you was constructed in 1863 for one of the earliest rail lines on the peninsula, the San Francisco & San Jose Railroad, which ran between the two cities of its name until it merged with the Central Pacific . . . Map (db m206367) HM
239 California, Santa Cruz County, Felton — 583 — Felton Covered Bridge
Near Covered Bridge Road, 0.5 miles south of Graham Hill Road.
Built in 1892-93 and believed to be the tallest covered bridge in the country, it stood as the only entry to Felton for 45 years. In 1937 it was retired from active service to become a pedestrian bridge and figured prominently in many films of that . . . Map (db m2348) HM
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240 California, Santa Cruz County, Felton — Roaring Camp Covered Bridge
Dedicated to the pioneer spirit of America which bridges past, present and future Designed in 1844 by Thomas Willis Pratt Constructed 1969 by Roaring Camp & Big Trees Narrow Guage RR. First Pratt-Truss covered bridge built in . . . Map (db m190688) HM
241 California, Santa Cruz County, Santa Cruz — The Wharf Links Land and SeaWelcome to the Sanctuary Scenic Trail
On West Cliff Drive at Gharkey Street, on the right when traveling north on West Cliff Drive.
You are looking at the Santa Cruz Municipal Wharf, a place where people gather for fun and relaxation. When this wharf was built in 1914, it supported commerce and transportation. Steamships loaded with freight and passengers left for ports around . . . Map (db m205960) HM
242 California, Shasta County, Anderson — Balls Ferry
On Gover Road at Ash Creek Road, on the right when traveling south on Gover Road.
Founded by Major Reading Operated by William Ball 1868 – 1897 Bridge then builtMap (db m70351) HM
243 California, Shasta County, Anderson — SHA-013 — The FlumePoint of Historical Interest — Dept. of Parks and Recreation – Reg. No. SHA-013 —
On Olinda Road, on the left when traveling west.
This aqueduct was built in 1918 as connecting link of main canal of Anderson Cottonwood Irrigation Dist., to carry water across Anderson Gulch to irrigate lands in southern Shasta Co. Aqueduct is 1249 ft. long, 8 ft. wide, 5 ft. deep and 20 ft. from . . . Map (db m70339) HM
244 California, Shasta County, Castella — 1 — Sims Bridge: A CCC First
On Sims Road.
It took a bit of grit and determination for the Forest Service and Civilian Conservation Corps (CCC) crew to build this sturdy bridge... Raymond Huber, who supervised the project remembers... “I was given a pickup and a plan of a 160-foot . . . Map (db m69821) HM
245 California, Shasta County, Redding — Diestelhorst Auto Camp / Reid’s Ferry
On Middle Creek Road at Benton Drive, on the right when traveling west on Middle Creek Road.
Two separate markers have been mounted on the same rock. Marker on the Right: Diestelhorst Auto Camp Gotlieb Justus Diestelhorst came to Shasta in 1852, to grow produce and vegetables to sell. He found the soil . . . Map (db m70331) HM
246 California, Shasta County, Whiskeytown — Toll BridgeWhiskeytown National Recreational Area — Tower House Historic District —
To cross Clear Creek in 1865 it would have cost you 10 cents to walk across, 25 cents to ride over on horseback, and $1.25 to cross by wagon. Charles Camden, the bridge owner, spent $20,000 to improve the road between here and the town of Shasta. . . . Map (db m12565) HM
247 California, Siskiyou County, Fort Jones — John F. Williams Memorial Bridge
On Scott River Road (at milepost 18), on the right when traveling north.
U S Forest Ranger John F. Williams Memorial Bridge Gave his life to save the life of a drowning girl at this location June 24, 1940Map (db m70257) HM
248 California, Siskiyou County, Tule Lake — Civilian Conservation Corps
On Hill Road, on the right when traveling north.
President Franklin Delano Roosevelt established the Civilian Conservation Corps on March 31, 1933, to provide employment for America's youth and promote the nation's economic recovery. The CCC's work involved conservation projects on forest, park . . . Map (db m547) HM
249 California, Siskiyou County, Weed — The Weed ArchTo the City of Weed from the People of Its Community
On Main Street at South Weed Boulevard, on the right when traveling north on Main Street.
The Arch is the strongest form of architecture known to Man. This steel arch replaces the original concrete arch first erected on this site in 1922. Due to the lack of maintenance over the years, surface cracks appeared. Because there were no . . . Map (db m62809) HM
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250 California, Solano County, Vallejo — The Carquinez Strait: Gateway to California's Riches
Near Dump Road at Lawes Street.
The bridges, oil refineries, factories and ports along the East Bay shoreline reflect a commercial history that dates back to the Gold Rush. The Carquinez Strait provided easy passage for ships carrying cargo and people to and from the gold . . . Map (db m232404) HM
251 California, Sonoma County, Glen Ellen — Historical Tid-bits about Glen Ellen
On Arnold Drive west of Carmel Avenue, on the right when traveling west.
Valley of the Moon is a translation of Sonoma Valley's name given by the Pomo and Coast Miwok peoples, the area's original inhabitants. Many writers and artists have found creativity here. Mary Francis Kennedy (MFK Fisher), excited by the . . . Map (db m231586) HM
252 California, Stanislaus County, Knights Ferry — 347 — Knight's Ferry← 1 Mile
On State Highway 120 at milepost 16.4 at Kennedy Road, on the left when traveling west on State Highway 120.
Picturesque mining center and trading post, 1849, once called Dentville. Early ferry to the southern mines; county seat 1862-72; rare wooden covered bridge reputedly designed by U. S. Grant, brother-in-law of the Dent brothers, 1854; old flour mill, . . . Map (db m178066) HM
253 California, Stanislaus County, Knights Ferry — Knight's Ferry BridgeNational Historic Landmark
Near Covered Bridge Road east of Sonora Road (Main Street), on the right when traveling east.
Knight's Ferry Bridge has been designated a National Historic Landmark This property possesses national significance in commemorating the history of the United States of America Knight’s Ferry Bridge is an exceptionally fine . . . Map (db m146387) HM
254 California, Stanislaus County, Knights Ferry — Knights Ferry Covered Bridge
Near Knights Ferry Road.
. . . Map (db m12013) HM
255 California, Stanislaus County, Newman — Hills FerryHistoric Landmark
On River Road, on the right when traveling north.
Founded 1849 by Judge O D Dickerson. Named for Jesse Hill Operator of the Ferry Boat that landed just upstream under the present bridge site.Map (db m58204) HM
256 California, Tehama County, Tehama — The Tehama Railroad Bridge
On C Street near Cavalier Drive, on the left when traveling east.
This turnstyle bridge served the California & Oregon Railroad Co. It was surveyed in September 1870 and was completed in August 1871. The bridge was first crossed by the steam locomotive "Falcon" and by the "Clipper" the following day with one . . . Map (db m89184) HM
257 California, Trinity County, Douglas City — Steel Bridge
Near Steel Bridge Road, on the left when traveling north.
The Union Hill Mines, which began in 1862, were located up the western slope of Union Hill from the mouth of Weaver Creek, at the head of Union Gulch. It was one of the largest placer mines in Trinity County. Water was ditched from Weaver Creek and . . . Map (db m70306) HM
258 California, Tuolumne County, Moccasin — 4 — Stevens Bar Bridge
On Jacksonville Road at River Road, on the right when traveling south on Jacksonville Road.
Beneath this bridge lies the site of the historic Gold Rush mining camp of Stevens Bar (or Stephens Bar) founded in 1849. The first bridge to span the upper Tuolumne River was constructed just above this point in 1857. Following its destruction . . . Map (db m53342) HM
259 California, Yolo County, Davis — Davis SubwayRichards Blvd. Underpass
Near Richards Boulevard, 0.5 miles south of 1st Street, on the left when traveling north.
Built in 1917-18, this entrance to Davis is among the oldest surviving examples of I-beam construction on a railroad grade separation. The underpass was part of the Lincoln Highway. The bicycle bore was added in 1978. Listed in the National Register . . . Map (db m57189) HM
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260 California, Yolo County, West Sacramento — Pony Express Bridge
Near 2nd Street.
Dedicated April 23, 2000 WEST SACRAMENTO by James Stretesky First Northern Bank Daniel F. Ramos Family Frank C. Ramos Family Dr. & Mrs. James O. Farley West Sacramento Land Company West Sacramento Chamber of Commerce Pony Express Trail . . . Map (db m15708) HM
261 California, Yolo County, West Sacramento — Tower BridgeWest Sacramento River Walk
Sacramento’s graceful Tower Bridge has spanned the river since 1936. It is the only historically significant vertical-lift bridge in California and was placed on the National Register of Historic Places in 1982. Lights added in 1986 in honor of its . . . Map (db m15711) HM
262 California, Yolo County, West Sacramento — Tower BridgeGateway to the Capitol
On Tower Bridge Gateway (California Route 275) at The American River, on the left when traveling east on Tower Bridge Gateway.
Identifying A Need By the early 1930s, Americans were moving away from trains and ships and turning to automobiles as their main mode of transportation. As a result, traffic on roadways increased dramatically. In Sacramento, M Street (now . . . Map (db m229443) HM
263 California, Yuba County, Camptonville — Marysville to Virginia City in 32 Hours49 Miles Along Highway 49
On Alleghany Ridge Road at Highway 49, on the right when traveling north on Alleghany Ridge Road.
In 1859 the rich Comstock Silver Lode was discovered in Washoe Territory, Nevada, causing many miners to quickly pack up and head east. Immediately a company was formed to construct a road connecting this area of California to the Comstock finds. . . . Map (db m65968) HM
264 California, Yuba County, Camptonville — Oregon Creek Covered Bridge
On Alleghany Ridge Road.
Built in 1860, the Oregon Creek Covered Bridge was floated from its foundations by the flood waters from the breaking of English Dam in 1883. It was restored to place by using ox teams and log rollers, but turned end for end in the process.Map (db m65967) HM
265 Colorado, Denver County, Denver, Central — Manny's Bridge
On Wynkoop Street, 0.1 miles west of 15th Street, on the left when traveling west.
This bridge symbolizes the revitalization of lower downtown Denver in the late twentieth century and represents one of the many contributions made to our community by Emanuel "Manny" Salzman. After moving to LoDo in 1980, Manny and his wife, Joanne, . . . Map (db m97412) HM
266 Colorado, Fremont County, Cañon City — Bustling Center for Trade, Transportation, and Tourism
On Royal Gorge Boulevard (U.S. 50) east of South 3rd Street, on the right when traveling east.
During the late 18th century and early 19th century, Cañon City prospered as a trade and transportation center serving the agriculture and mining industries of the region. From its earliest days, Cañon City attracted visitors to soak in warm . . . Map (db m153316) HM
267 Colorado, Fremont County, Cañon City — How the Bridge Became RoyalRoyal Gorge Bridge & Park America's Bridge ™Come Across
Near County Road 3A, 4.5 miles south of U.S. 50 when traveling south.
A Fitting Name This amazing chasm was originally known as the "Grand Cañon of the Arkansas," which was sometimes confused with the "Grand Canyon of the Colorado." In the summer of 1874, Charles Savage, a famous railroad photographer from . . . Map (db m232533) HM
268 Colorado, Fremont County, Cañon City — 141 — Royal Gorge
On County Road 3A, 4.5 miles south of U.S. 24, on the right when traveling south.
Lt. Zubulon M. Pike and his men, who traveled through this area in November and December 1806, were the first American explorers to view the Arkansas River Canyon now known as the Royal Gorge. A small party from the Maj. Stephen H. Long expedition . . . Map (db m34858) HM
269 Colorado, Fremont County, Cañon City — Royal Gorge Bridge
On County Road 3A, on the left when traveling east.
Highest suspension bridge in the world Completed in seven months - Dedicated Dec. 7, 1929 Chief Engineer George Cole Consulting Engineer O.K. Peck This property has been placed on National Register of Historic Places By U.S. . . . Map (db m39304) HM
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270 Colorado, Fremont County, Florence — Rio Grande Railroad Viaduct
On Colorado Route 120 south of Colorado Route 115, on the right when traveling south.
Paving the Way The Rio Grande Railroad Viaduct helped bring the world to the Royal Gorge. "The opening of the new bridge is hailed with joy by Florence," wrote the Florence Daily Record on July 14, 1931, as the first autos . . . Map (db m232499) HM
271 Colorado, Fremont County, Penrose — Arkansas Valley Country
On U.S. 50, 0.2 miles east of Phantom Canyon Road (County Road 67), on the right when traveling west.
Clockwise, from top • The Pioneer Museum in Florence highlights the town's industrial past. Ample coal and water made the town an optimal site fer processing ore shipped via the Florence and Cripple Creek . . . Map (db m153002) HM
272 Colorado, Fremont County, Penrose — The Royal Gorge
On U.S. 50, 0.2 miles east of Phantom Canyon Road (County Road 67), on the right when traveling west.
Royal Gorge Railroad War Racing to lay the first tracks into the Colorado Rockies in April 1878, the Denver & Rio Grande and its rival, the Atchison, Topeka & Santa Fe, reached the Royal Gorge in a dead heat. Competing construction crews . . . Map (db m152999) HM
273 Colorado, Gunnison County, Sapinero — Crossing the Canyon
On U.S. 50, on the right when traveling west.
Four bridges once stood southwest of the original town site of Sapinero. Cars and trucks used the high bridge to travel between Gunnison and Montrose. Anglers used the low bridge to access the river. The Denver & Rio Grande Railroad needed two . . . Map (db m158933) HM
274 Colorado, Jefferson County, Golden — Billy Drew Bridge
Near 10th Street, 0 miles south of Illinois Street, on the right when traveling east.
(left side) Bridging Our History This bridge is the second Billy Drew Bridge erected on this site. The original Billy Drew Bridge was built in 1976 as part of Golden’s celebration of the Centennial-Bicentennial, the nation’s 200th . . . Map (db m70396) HM
275 Colorado, Jefferson County, Golden — Bridge Load Ordinance Background
On Washington Avenue.
Colorado Transcript, September 13, 1882: “Washington Avenue Bridge was badly damaged last Saturday evening by some ignoramus driving and crowding a big drove of cattle on to it. The damage has since been repaired.” Golden . . . Map (db m49897) HM
276 Colorado, Jefferson County, Golden — Ferrell/Berthoud Home (Miners Hotel)
On Washington Avenue.
John M. Ferrell came to the Golden valley from upstate New York in June of 1859. He camped on the southeastern banks of Clear Creek and created the Washington Avenue crossing for the gold rushers. When Golden was organized, Ferrell became one of its . . . Map (db m49895) HM
277 Colorado, Jefferson County, Golden — Greeley’s Crossing
On Washington Avenue.
In June, 1859, while the first bridge was being built over Clear Creek, the famous reporter Horace Greeley passed through Golden. He attempted to cross Clear Creek from this point on the south bank. Horace embarked on his mule from the river bank . . . Map (db m49898) HM
278 Colorado, Jefferson County, Golden — Horace Greeley’s Crossing Point
Near Washington Avenue.
Before the first bridge on this site was completed, travelers forded the river just east of this bridge. It became risky during the peak of the spring river flows due to the melting snows that filled the streams and rivers. In June of 1859, . . . Map (db m50179) HM
279 Colorado, La Plata County, Durango — Baker's Bridge
On County Highway 250, 0.5 miles east of U.S. 550, on the left when traveling east.
Captain Charles H. Baker, who discovered gold in the San Juan in 1860, led a party of prospectors to this area in 1861. They placer mined on El Rio de las Animas, built the first bridge (300 feet north), and established the town called Animas . . . Map (db m177471) HM
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280 Colorado, La Plata County, Durango — Florida River Railroad Bridge No. 437
On Ranchos Florida Drive, 0.2 miles east of County Highway 222, on the right when traveling east.
The Florida River Railroad Bridge No. 437 (distance in miles from Denver, Colorado), provided an important river crossing in the Denver and Rio Grande's (D&RG) route to Denver. The Union Bridge Company fabricated the Pratt through-truss bridge in . . . Map (db m177463) HM
281 Colorado, Montrose County, Cimarron — All Aboard
On Morrow Point Dam Road, 1 mile north of U.S. 50, on the left when traveling north.
Promoters called this the "Scenic Line of the World" to entice travelers to see western Colorado by rail. The Denver & Rio Grande guidebook Around the Circle invited readers to join the trip: "Unlike many of the Colorado canyons, . . . Map (db m158937) HM
282 Colorado, Montrose County, Montrose — Building a Dam
Near East Portal Road.
Fir logs, up to 30 feet in length, formed the base for the diversion dam. Although built in the winter when the river was sluggish, pumps were needed to divert the flow around the construction site. The dam is used to fill the tunnel when the water . . . Map (db m120247) HM
283 Colorado, Montrose County, Montrose — Light at the End of the Tunnel
Near East Portal Road.
Surveyors took daily measurements to ensure that drillers, powdermen, muckers, and haulers stayed on course inching their way toward the valley. Crews at the other end plowed toward the canyon. Using points across the river, as well as in the . . . Map (db m120245) HM
284 Colorado, Montrose County, Montrose — The Gunnison Tunnel
On West Main Street at Townsend Avenue, on the right when traveling north on West Main Street.
The Tunnel That Made the Desert Bloom Early settlers in the Uncompahgre Valley found getting water to the fertile but arid soil an ongoing challenge. Originally, irrigation water from the Uncompahgre River was diverted onto the land through . . . Map (db m120134) HM
285 Colorado, Morgan County, Fort Morgan — Rainbow Arch Bridge
On State Highway 52, 0.1 miles north of Interstate 76, on the right when traveling north.
Spanning the South Platte River, the Rainbow Arch Bridge carried vehicular traffic from its completion in 1923 until its closure in 1988. Engineer James B. Marsh of Des Moines, Iowa, designed the structure in 1922. Denver bridge contractor Charles . . . Map (db m47194) HM
286 Colorado, Pueblo County, Colorado City — Greenhorn Creek BridgeThe unusual bridge offered a window to travel on one of Colorado's earliest highways
On State Highway 181 south of State Highway 165, on the left.
Built in 1928, the Greehorn Bridge carried Pueblo County Road 273/Apache City Road over Greeenhorn Creek and was a rare example of a Warren deck truss structure. Because of its association with the early route known as the Great North - South . . . Map (db m189636) HM
287 Connecticut, Fairfield County, Newtown — Washington – Rochambeau Revolutionary RouteHousatonic Crossing
On Church Hill Road (U.S. 6) at Queen Street, on the right when traveling west on Church Hill Road.
French General Jean Baptiste Donatien de Vimeur, comte de Rochambeau, and thousands of French ground and naval forces arrived in Newport in July of 1780 to assist the Americans in the War for Independence. After wintering in Newport, Rochambeau’s . . . Map (db m26915) HM
288 Connecticut, Fairfield County, Shelton — Commodore Isaac Hull Bridge
On Howe Avenue (Connecticut Route 110) at Kneen Street, on the right when traveling south on Howe Avenue.
Commodore Isaac Hull Bridge Named for the Heroic Commander Of the U.S. Frigate “Constitution” During Its Great Naval Victories In the War of 1812 Born in Derby March 9, 1773 Resided in Shelton 1785 – 1794 This . . . Map (db m25381) HM
289 Connecticut, Fairfield County, Westport — The Post Road Bridge
On Jesup Road at Taylor Place, on the right when traveling east on Jesup Road.
The Post Road Bridge 1807 Westport was a prosperous shipping community with wharves, docks, and shipyards along both sides of the Saugatuck River. The first Post Road Bridge was owned and built by the Connecticut Turnpike Company, a public . . . Map (db m30644) HM
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290 Connecticut, Hartford County, Farmington — The Farmington Aqueduct
Near Waterville Road.
The Farmington Canal crossed various topographic features- rivers, hills, roads and woodlands. Boats traveling the length of the canal passed through 28 locks that compensated for changes in elevation. Perhaps the most impressive engineering . . . Map (db m111590) HM
291 Connecticut, Hartford County, Hartford, Downtown — The Founders Bridge
Near Columbus Boulevard at State Street, on the right when traveling north.
Commemorating the men and women who traveled here in 1636 with the Rev. Thomas Hooker to found the City of HartfordMap (db m52620) HM
292 Connecticut, Hartford County, Simsbury — Weatogue Bridge
Near Old Bridge Road, 0.1 miles south of Drake Hill Road.
A toll bridge was built here in 1734 by order of the General Assembly it was the first highway bridge across the Farmington River Map (db m102001) HM
293 Connecticut, Litchfield County, New Milford — Falls Bridge
Near Still River Drive, 0.2 miles east of Pumpkin Hill Road, on the right when traveling east.
By the 1890’s New Milford’s old wooden bridges had outlived their usefulness, considering their age, the increasing amount of traffic and the coming of the horseless carriage. A sturdy and very ornate iron bridge, built by the Berlin Iron Bridge . . . Map (db m22740) HM
294 Connecticut, Middlesex County, Clinton — The Hammock Marshes
Near Osprey Commons South east of Beach Park Road, on the right when traveling east.
The Work of the Salt Marsh You are standing at the edge of an ancient marsh, above layers of peat forty feet deep. Once an inland freshwater lake, the Hammock estuary is now flooded twice daily by nutrient-rich salt tides. Tidal salt . . . Map (db m243105) HM
295 Connecticut, Middlesex County, East Hampton — Comstock Covered Bridge
On Colchester Avenue (Connecticut Route 16) at Browns Mill Road, on the right when traveling north on Colchester Avenue.
Comstock Covered Bridge Built in 1873 by the Towns of Colchester and East Hampton The Comstock Covered Bridge is one of only three historic covered bridges remaining in Connecticut. With a main span 80 feet in length (measured from the faces of . . . Map (db m84109) HM
296 Connecticut, New Haven County, Hamden — A. Frederick Oberlin Bridge
On Whitney Avenue at Armory Street, on the right when traveling north on Whitney Avenue.
. . . Map (db m28747) HM
297 Connecticut, New Haven County, Meriden — Red Bridge
On Oregon Road at River Road (Connecticut Route 70), on the right when traveling south on Oregon Road.
Length 78 feet – width 16 feet Listed on the Register of Historic Places by the U.S. Department of the Interior, National Park Service Erected in 1891 by the Berlin Iron Bridge Company Red Bridge is of lenticular pony truss . . . Map (db m26587) HM
298 Connecticut, New Haven County, Milford — Jefferson Bridge
On River Street, 0.1 miles north of West River Street, on the left when traveling north.
. . . Map (db m26441) HM
299 Connecticut, New Haven County, Milford — King’s Bridge1711
On Maple Street, 0.1 miles west of North Street, on the right when traveling west.
Site of King’s Bridge - 1711 connecting Peacocke Lane (Maple Street) to Governor’s Lane (Avenue) Freelove Baldwin Stow Chapter D.A.R. July 4, 1962 Map (db m26331) HM
300 Connecticut, New Haven County, Milford — Memorial to Three Milford Men1639     1939
On River Street, 0.1 miles north of West River Street, on the right when traveling north.
[ east side of the column ] This Bridge Dedicated On the 300th Anniversary Of the Settlement Of The Town of Milford A Memorial to Three Milford Men Who Were Governors of the Colony and State Of Connecticut [ north side . . . Map (db m26445) HM

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May. 25, 2024