Denver Public Library Western History/Genealogy Digital Collections

- Alva B. Adams Tunnel
- View of the West Portal of the Continental Divide Tunnel (Alva Adams Tunnel), a part of the Colorado-Big Thompson Project, during construction on the east end of Grand Lake in Grand County, Colorado. The work was undertaken by the United States...
- United States. Bureau of Reclamation--Facilities.; Water diversion--Colorado--Grand County--1930-1940.; Water tunnels--Colorado--Grand County--1930-1940.; Alva B. Adams Tunnel (Colo.)--1930-1940.; Grand County (Colo.)--1930-1940.;...
- [between 1939 and 1940?]
- Moffat Tunnel. East Portal 1951
- A railroad track for the Denver & Rio Grande Railroad runs from the foreground back to the East Portal of the Moffat Tunnel on Rollins Pass in Gilpin County, Colorado. A small group of tents is in the foreground. Pine trees stand along the...
- Railroad tunnels--Colorado--Gilpin County--1950-1960.; Gilpin County (Colo.)--1950-1960.; Moffat Tunnel (Colo.)--1950-1960.; Tents--Colorado--Gilpin County--1950-1960.; Denver and Rio Grande Railroad Company.
- [1951?]
- Moffat Tunnel. East Portal 1951
- A railroad track for the Denver & Rio Grande Railroad runs from the foreground back to the East Portal of the Moffat Tunnel on Rollins Pass in Gilpin County, Colorado. A small group of tents is in the foreground. Pine trees stand along the...
- Railroad tunnels--Colorado--Gilpin County--1950-1960.; Gilpin County (Colo.)--1950-1960.; Tents--Colorado--Gilpin County--1950-1960.; Denver and Rio Grande Railroad Company.
- [1951?]
- Moffat Tunnel- West Portal, Grand County, Colo.
- View of the West Portal of the Moffat Tunnel located in Grand County, Colo. The tunnel officially opened on February 26, 1928 as part of the mainline route across Colorado for the Denver and Salt Lake Railroad. Above the entrance to the tunnel...
- Railroad Tunnels--Colorado--Grand County--2000-2010.; Moffat Tunnel (Colo.)--2000-2010.; Grand County (Colo.)--2000-2010.; Denver and Salt Lake Railroad Company--Pictorial works.; Railroad tunnels--Colorado--Grand County--Pictorial works.; Moffat...
- 2006
- Silverton
- Reproduction of ink rendering; shows Silverton, San Juan County, Colorado, and: "1. Greene Co. Smelter 2. Anvil Mountain 3. Rough 'n Ready Smelter 4. Kendall Mountain 5. Las Animas River 6. Cement Creek 7. Town T- Call 8. Melville's Lightning...
- Silverton (Colo.)--1870-1880.
- [between 1870 and 1880?]
- Colo. & Southern, Alpine Pass, office and depot at Alpine Tunnel, Colorado from tunnel (east) side, August 6, 1939
- View east of the Western Union Telegraph and Cable Office, and depot at Alpine Tunnel, (11,545 feet), Gunnison County, Colorado shows the small dilapidated front gable clapboard structure, rooftop sign, "Alpine Tunnel," remains of a railroad signal...
- Alpine Station (Colo. : Locale)--1930-1940.; Railroad stations--Colorado--Alpine Tunnel--1930-1940.; Railroad stations--Colorado--Gunnison County--1930-1940.; Telegraph offices--Colorado--Gunnison County--1930-1940.
- 1939 August 6
- West portal Continental Divide Tunnel
- View of the entrance to the west portal of the Alva B. Adams Tunnel of the United States Reclamation Bureau Colorado Big Thompson Project water diversion tunnel in Grand County County, Colorado. A sign reads: "West Portal Continental Divide Tunnel,...
- Colorado-Big Thompson Project (U.S.)--1940-1950.; Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Tunnels--Colorado--Grand County--1940-1950.
- [between 1940 and 1947]
- Municipal Facts: Volume 9 Numbers 3 and 4, 1926 March-April
- Holing through ceremonies
- Men, a woman and a boy pose at a ceremony for the completion of the the pioneer bore, a tunnel (later a water tunnel) used in the construction of the Moffat Tunnel by the Moffat Tunnel Improvement District, in Grand County or Gilpin County,...
- Moffat Tunnel (Colo.)--1920-1930.; Dedications--Colorado--1920-1930.; Tunnels--Colorado--1920-1930.; Workers--Colorado--1920-1930.
- 1927 March 10
- Holing through ceremonies
- Men and a boy sit or stand near a microphone during a ceremony for the completion of the the pioneer bore, a tunnel (later a water tunnel) used in the construction of the Moffat Tunnel by the Moffat Tunnel Improvement District, in Grand County or...
- Moffat Tunnel (Colo.)--1920-1930.; Dedications--Colorado--1920-1930.; Governors--Colorado--1920-1930.; Mayors--Utah--Salt Lake City--1920-1930.; Tunnels--Colorado--1920-1930.; Adams, William Herbert, 1861-1954.; Neslen, C. Clarence.
- 1927 March 10
- Moffat Railroad - East Portal
- 26, 1928 when the first passenger train passed through it. (Moffat died in 1911 and thus never saw his dream become a reality.) The tunnel passed under James Peak and eliminated the 27-mile trip up the steep grade of Rollins Pass, effectively ...
- Railroad tunnels--Colorado--Gilpin County--1950-1960.; Gilpin County (Colo.)--1950-1960.; Moffat Tunnel (Colo.)--1950-1960.; Passes (Landforms)--Colorado--1950-1960.; Railroads--Colorado--Gilpin County--1950-1960.; Tents--Colorado--Gilpin...
- [1951?]
- East Portal, Moffat Tunnel
- East Portal Moffat Tunnel, Denver & Salt Lake Railroad Tunnel through Continental Divide, Gilpin County, Colorado; shows tunnel entrance and ventilating plant, railroad tracks, power lines, two survey swaths cut over mountain in line with tunnel,...
- Denver and Salt Lake Railway Company--1920-1930.; Railroad tunnels--Colorado--Gilpin County--1920-1930.; Gilpin County (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1920-1930.; Railroad tracks--Colorado--Gilpin County--1920-1930.
- [1940-1949?]
- Columbine tunnel
- A miner stands in front of a wood building with a sign above the door that reads: "Columbine Tunnel", Cripple Creek District, Teller County, Colorado. A few yards away, built into the hill, is another entrance with a "Columbine Tunnel" sign and...
- Columbine Tunnel (Mine : Teller County, Colo.)--1890-1910.; Teller County (Colo.)--1890-1910.; Miners--Colorado--Teller County--1890-1910.; Mining--Colorado--Teller County--1890-1910.; Tailings embankments--Colorado--Teller County--1890-1910.
- [between 1890 and 1910?]
- East Portal, Colo., site of Moffat Tunnel
- Gable-roofed workers' residences and business buildings at the East Portal of the Moffat Tunnel in Colorado are on the north mountainside and in the valley of the approach to the tunnel. Train tracks run in front of the buildings and into the...
- East Portal (Colo.)--1920-1930.; Moffat Tunnel--1920-1930.; Dormitories--Colorado--East Portal--1920-1930.; Tunnels--Colorado--East Portal--1920-1930.
- 1926
- Tunnel No. 29 from above, Moffat Road
- Looking down on Denver, Northwestern & Pacific Railway's tunnel number Twenty-nine, Moffat Road, Colorado; push car used by L.C. McClure on standard gauge track winds along mountains and rock walls; wooden trestle, center foreground.
- Railroad handcars--Colorado--1900-1910.; Trestles--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver, Northwestern and Pacific Railway.
- [1904?]
- Tunnel No. 10, 11 Mile Canon
- View of a Colorado Midland Railway locomotive tender or caboose on narrow gauge tracks in a tunnel through a rock formation in Elevenmile Canyon (Park County), Colorado. Men, women and children pose near the tunnel opening and a sign that reads:...
- Colorado Midland Railway Company--1880-1900.; Elevenmile Canyon (Colo.)--1880-1900.; Park County (Colo.)--1880-1900.; Railroads--Colorado--Park County--1880-1900.; Rock formations--Colorado--Park County--1880-1900.; Tunnels--Colorado--Park...
- [between 1887 and 1900?]
- WPCD
- Workers stand beside railroad tracks, tools and ladders inside the the west portal of the Alva B. Adams Tunnel of the United States Reclamation Bureau Colorado Big Thompson Project water diversion tunnel (west portal of the Continental Divide...
- Colorado-Big Thompson Project (U.S.)--People--1940-1950.; Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Employees--Colorado--Grand County--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.;...
- [between 194 and 1947]
- Breast of Gold Standard Tunnel, Cripple Creek
- Miners sit and stand at the entrance of the Gold Standard Tunnel in Cripple Creek, Teller County, Colorado. Two workers hold onto Mining equipment, possibly a pump or drill used to widen the tunnel opening.
- Cripple Creek (Colo.)--1890-1910.; Gold Standard Group Mine (Teller County, Colo.)--1890-1910.; Gold mining--Colorado--Cripple Creek--1890-1910.; Miners--Colorado--Cripple Creek--1890-1910.; Mining--Colorado--Cripple Creek--1890-1910.
- [between 1890 and 1910]
- Raton Tunnel,
- View of an Atchison, Topeka and Santa Fe locomotive as it exits Raton Tunnel, near Wootton siding in Las Animas County, Colorado. Shows a mountain landscape and cattle.
- Atchison, Topeka, and Santa Fe Railway Company--1900-1920.; Las Animas County (Colo.)--1900-1920.; Raton Pass (Colo. and N.M.)--1900-1920.; Passes--Colorado--Las Animas County--1900-1920.; Railroads--Colorado--Las Animas County--1900-1920.;...
- [between 1908 and 1915?]
- Tunnel at Corno di Bo
- The tunnel at Corno di Bo was one of seven tunnels at the north end of Lake Garda. They were difficult objectives for the Tenth Mountain Division as German resistance was strong. The tunnels had built-in gun ports like the one visible to the left...
- Garda, Lake (Italy)--1940-1950.; Tunnels--Italy--1940-1950.; War casualities--Italy--1940-1950.; United States. Army. Mountain Division, 10th.; World War, 1939-1945--Campaigns--Italy.
- April 1945
- Black Hawk - 1953, Bobcat Tunnel
- View of the Bobtail Tunnel in Black Hawk, Colorado. A rectangular structure of stone construction, the Bobtail tunnel is single story with five bays on the main facade. A sign hangs above the windows: "The World Famous Bobtail Tunnel." The...
- Blackhawk (Colo.)--1950-1960.; Mining--Colorado--Blackhawk--1950-1960.; Tunnels--Colorado--Blackhawk--1950-1960.
- 1953
- West Portal, Alpine Tunnel, Gunnison County, Colo.
- View of the West Portal of the Alpine Tunnel in Gunnison County, Colo. Located above timberline near the town of Pitkin, the narrow gauge railroad tunnel was constructed in 1882 underneath the Continental Divide in order to connect to the town of...
- Alpine Tunnel (Colo.)--1990-2000.; Railroad tunnels--Colorado--Gunnison County--1990-2000.; Gunnison County (Colo.)--1990-2000.; Alpine Tunnel (Colo.)--Pictorial works.; Railroad tunnels--Colorado--Gunnison County--Pictorial works.; Gunnison County...
- 1990
- Needle's Eye Tunnel, Boulder County, Colo.
- View of Needle's Eye Tunnel located on the Continental Divide in Boulder County, Colo. near Rollins Pass a.k.a. Corona Pass. A part of the Moffat Road, it was built in the early 20th century by Daniel Moffat as part of the Denver, Northwestern...
- Railroad Tunnels--Colorado--Boulder County--1970-1980.; Needle's Eye Tunnel (Boulder County, Colo.)--1970-1980.; Boulder County (Colo.)--1970-1980.; Denver, Northwestern, and Pacific Railway--Pictorial works.; Railroad tunnels--Colorado--Boulder...
- 1974
- Moffat Tunnel, East Portal
- Close up of East Portal Moffat Tunnel, Denver & Salt Lake Railroad Tunnel through Continental Divide, Gilpin County, Colorado; shows tunnel entrance and ventilating plant, railroad tracks, power lines, "No Trespassing" sign above white rocks placed...
- Denver and Salt Lake Railway Company--1920-1930.; Railroad tunnels--Colorado--Gilpin County--1920-1930.; Gilpin County (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1920-1930.; Railroad tracks--Colorado--Gilpin County--1920-1930.
- [between 1927 and 1928]
- Colo. & Southern, Alpine Pass
- View from slope above shows the dilapidated boarding house hotel, Western Union Telegraph and Cable office and depot, and stone enginehouse at Alpine Tunnel, (11,545 feet) Gunnison County, Colorado. Two-story boarding house, built by the Colorado...
- Alpine Station (Colo. : Locale)--1930-1940.; Gunnison County (Colo.)--1930-1940.; Railroad stations--Colorado--Gunnison County--1930-1940.; Telegraph offices--Colorado--Gunnison County--1930-1940.
- August 6, 1939
- Gem - Newhouse, Colorado
- Interior view of the Newhouse tunnel, Clear Creek County, Colorado, shows two hand cars on tracks and heavily timbered tunnel walls. The Newhouse tunnel was the longest tunnel of its time, having being driven five miles from Idaho Springs to...
- Clear Creek County (Colo.)--1900-1920.; Mine railroads--Cars--Colorado--Clear Creek County--1900-1920.; Interiors--Colorado--Clear Creek County--1900-1920.; Mining--Colorado--Clear Creek County--1900-1920.
- [between 1900 and 1920?]
- Municipal Facts Bi-Monthly: Volume 5 Numbers 3 and 4, 1922 March-April
- Alpine tunnel, Pacific slope
- Men sit and pose on a Denver, South Park & Pacific railroad Engine, labeled "42", and passenger car on a stone embankment at the west portal of the tunnel near Alpine Station in the Sawatch Mountains (Gunnison County), Colorado. View shows a...
- Denver, South Park, and Pacific Railroad Company--1880-1890.; Alpine Tunnel (Colo.)--1880-1890.; Gunnison County (Colo.)--1880-1890.; Railroads--Colorado--Gunnison County--1880-1890.; Tunnels--Colorado--Gunnison County--1880-1890.
- [between 1880 and 1889?]
- Tunnel 6 and Plaines [sic], Moffat Road
- View towards Denver, Northwestern & Pacific Railway (later called Denver & Salt Lake) Tunnel Six along the Moffat Road, Colorado; distant view of the Plains; man, stack of posts and small machine (wire spool or hoist mechanism) alongside standard...
- Plains--Colorado--1900-1920.; Railroad tracks--Colorado--1900-1920.; Tunnels--Colorado--1900-1920.; Denver, Northwestern and Pacific Railway.
- [between 1904 and 1915]
- Mouth of Sutro tunnel
- Men pose at the mouth of the Sutro Tunnel which is marked by an elaborate entryway, Virginia City, Nevada. The tunnel is nine miles long and was used to drain the mines on the Comstock lode. Painted on the entry: "Commenced October 19th, 1869,...
- Sutro Tunnel (Nev.)--1870-1890.; Virginia City (Nev.)--1870-1890.; Miners--Nevada--Virginia City--1870-1890.; Mining--Nevada--Virginia City--1870-1890.; Tunnels--Nevada--Virginia City--1870-1890.
- [between 1870 and 1890?]
- Moffat Tunnel - west portal
- Denver and Salt Lake Railway tracks enter the west portal of the Moffat Tunnel in Grand County, Colorado, by sheds and tunnel maintenance buildings; signs read: "1923 Moffat Tunnel 1927," and "No Admittance Except for Employees on Shift."
- Denver and Salt Lake Railway Company--1930-1940.; Grand County (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1930-1940.; Railroad facilities--Colorado--Grand County--1930-1940.; Railroad tracks--Colorado--Grand County--1930-1940.;...
- 1934
- Colo. & Southern, Alpine Pass, view looking toward Alpine Tunnel station and hotel from west (lower) side, August 6, 1939
- View looking west toward Alpine Tunnel station, (11,545 feet) Gunnison County, Colorado, includes abandoned railroad tracks, ruins of the hand-hewn stone engine house, two-story frame boarding house, railroad signal and telegraph office. Town was...
- Alpine Station (Colo. : Locale)--1930-1940.; Railroad stations--Colorado--Alpine Tunnel--1930-1940.; Railroad stations--Colorado--Gunnison County--1930-1940.; Telegraph offices--Colorado--Gunnison County--1930-1940.
- 1939 August 6
- Tunnel 33 from Continental Divide, Moffat Road
- Bird's eye view of above timberline Tunnel Number Thirty-two (named Needle's Eye Tunnel because of its cut in ridge) and surrounding ridges; McClure misidentified tunnel number in title; shows standard gauge railroad track, lake, and forested...
- Railroad passenger cars--1900-1910.; Railroad tracks--Colorado--1900-1910.; Tunnels.; Denver, Northwestern and Pacific Railway.
- 1904
- Tunnel No. 4, Cripple Creek Short Line
- View of Tunnel Number Four, trestle and standard gauge track on Cripple Creek Short Line; push car used by L.C. McClure on track; Tunnel 4 often called the Granite Tunnel, longest of nine tunnels on the Short Line without any timbers in its 521...
- Railroad bridges--1900-1920.; Railroad handcars--1900-1920.; Railroad tracks--Colorado--1900-1920.; Trestles--1900-1920.; Tunnels--1900-1920.; Colorado Springs & Cripple Creek District Railway.
- [between 1900 and 1920]
- Men and woman by tunnel entrance
- Men and women pose in a ravine on ore car tracks, part of the canal construction of the Gunnison Tunnel Project of the U.S. Reclamation Service in Montrose County, Colorado. Women wear fitted skirts with pleats and flared hems, sailor's hats or...
- Gunnison Tunnel (Colo.)--1900-1910.; Montrose County (Colo.)--1900-1910.; Canal construction--Colorado--Montrose County--1900-1910.; Irrigation canals & flumes--Colorado--Montrose County--1900-1910.; Tunnels--Colorado--Montrose County--1900-1910.;...
- [between 1905 and 1909]
- Men in tunnel with tools
- Men pose at a tunnel, probably part of the Gunnison Tunnel Project in Montrose County, Colorado. Men wear suits or overalls, wide-brimmed hats, caps, and work boots. A box of dynamite sticks is on the ground in the tunnel. Tools are lean against...
- Gunnison Tunnel (Colo.)--1900-1910.; Montrose County (Colo.)--1900-1910.; Construction workers--Colorado--Montrose County--1900-1910.; Tunnels--Colorado--Montrose County--1900-1910.
- [between 1905 and 1909?]
- East Portal residences, Moffat Tunnel
- The East Portal of the Moffat Tunnel in Colorado is partly obscured by steam. Gable-roofed residences for the workers are on the north side of the approach to the tunnel; two sets of railroad tracks lead into the tunnel and people work around them....
- East Portal (Colo.)--1920-1930.; Moffat Tunnel--1920-1930.; Dormitories--Colorado--East Portal--1920-1930.; Tunnels--Colorado--East Portal--1920-1930.
- [1927?]
- Moffat Tunnel
- Smoke rises from a Denver & Salt Lake Railway Company locomotive at the entrance to the Moffat Tunnel at the west portal near Winter Park in Grand County, Colorado. Shows snow and icicles, the dates "1923" and "1927" carved on both sides of the...
- Denver and Salt Lake Railway Company--1920-1930.; Railroad tunnels--Colorado--Grand County--1920-1930.; Grand County (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1920-1930.; Railroad locomotives--Colorado--Grand County--1920-1930.;...
- [1928?]
- Ceremonies at completion of Moffat Tunnel
- People gather around a KOA radio broadcast microphone at a ceremony to celebrate the completion of the Moffat Tunnel at East Portal (Gilpin County), Colorado. An announcer holds a piece of paper and stands on a podium. Men wear suits and overcoats,...
- Denver and Salt Lake Railway Company--1920-1930.; Railroad tunnels--Colorado--East Portal--1920-1930.; East Portal (Colo.)--1920-1930.; Moffat Tunnel (Colo.)--1920-1930.; Dedications--Colorado--East Portal--1920-1930.;...
- [1928 February 26]
- Proposed colossus to be carved above each portal entrance to Moffat Tunnel
- Close-up view of a clay sculpture of a proposed Denver and Salt Lake Railway Company tunnel entrance to be built at both portals of the Moffat Tunnel. The figure of a nude man holds a torch in the air with one hand, and a model of probably the...
- Moffat Tunnel (Colo.)--1920-1930.; Maquettes--1920-1930.; Models--1920-1930.
- 1923, October, November or December
- Tunnel 33 from Continental Divide, Moffat Road
- Distant view of Denver, Northwestern & Pacific Railway (later became Denver & Salt Lake Railroad) passenger train approaching Tunnel Number Thirty-two (named Needle's Eye because of its cut through the ridge); tunnel number misidentified by McClure...
- Railroad passenger cars--1900-1910.; Railroad tracks--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver, Northwestern and Pacific Railway.
- [ca. 1905?]
- Hanging Rock near Tunnel 29, Moffat Road
- View down Denver and Salt Lake Railroad's standard gauge track crossing over South Boulder Creek near Tunnel Number Thirty (30); shows trestle covered with ballast to discourage sparks from starting a fire and telephone poles paralleling track;...
- South Boulder Creek (Colo.)--1900-1930.; Trestles--Colorado--1900-1930.; Tunnels--Colorado--1900-1930.; Denver and Salt Lake Railroad Company.
- [between 1904 and 1925]
- Tunnel 29, Moffat Road
- View of Denver and Salt Lake Railroad passenger train steaming out of Tunnel Number 29 (Twenty-nine) on standard gauge track; smoke in background billows out of distant tunnels; Moffat Road, Colorado.
- Railroad passenger cars--1900-1930.; Tunnels--Colorado--1900-1930.; Denver and Salt Lake Railroad Company.
- [between 1904 and 1925]
- South Boulder Creek near Tunnel 29, Moffat Road
- Looking down South Boulder Creek near Tunnel Number Twenty-nine, Moffat Road, Colorado; push car used by L.C. McClure on standard gauge track above stream in canyon; Denver and Salt Lake Railroad.
- South Boulder Creek (Colo.)--1900-1910.; Railroad handcars--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver and Salt Lake Railway Company.
- [1904?]
- Sphinx Head Rock, Tunnel 30, Moffat Road
- Sphinx Head Rock with Denver, Northwestern & Pacific engine Number 100 (one hundred) emerging from Tunnel Number Thirty; elk horns placed on oil headlight by engineer Billy Rush to distinguish his engine; standard gauge track passing over former...
- Sphinx Head Rock (Colo.)--1900-1910.; Railroad locomotives--Colorado--1900-1910.; Trestles--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver, Northwestern and Pacific Railway.
- [1904?]
- Tunnel 4, Moffat Road
- View toward Denver, Northwestern & Pacific Railway's (later became Denver & Salt Lake) tunnel Number Four, Moffat Road, Colorado; McClure had taken train to Mammoth where railroad gave him a push car & a train man; shows push car on standard gauge...
- Railroad handcars--Colorado--1900-1910.; Telegraph lines--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver, Northwestern and Pacific Railway.
- [1904?]
- Municipal Facts: Volume 2 Numbers 9 and 10, 1919 September-October
- West Port[al] CD office man at office door
- Men smile and pose at night by a metal building and a sign: "Office Platt Rogers, Inc. Contractors - Continental Divide Tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand...
- Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Men--Colorado--Grand County--1940-1950.; Metal buildings--Colorado--Grand County--1940-1950.; Night--Colorado--Grand County--1940-1950.
- [between 1940 and 1947?]
- WPCD loaded face
- View of a tunnel charged with dynamite at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
- Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Explosives--Colorado--Grand County--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.;...
- [between 1940 and 1950?]
- WPCD mucking left 3/4
- A man loads rubble onto an ore car in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
- Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.; Laborers--Colorado--Grand County--1940-1950.;...
- [between 1940 and 1950?]