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NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Catalog of Images

5850 thumbnail picture
Launch wiredrag operations. L to r - guide launch, tender, end launch. Launches off of PATHFINDER
Washington, Guemes Channel, Anacortes 1958
5851 thumbnail picture
Diagram of wiredrag operations ca. 1980. Basically the same system as devised in the early Twentieth Century
5852 thumbnail picture
Chain drag operation - hung up on obstruction. Launches off of PEIRCE
Delaware Bay 1985
5853 thumbnail picture
Pole signal with tin cone for reflecting sunlight. Constructed by survey crews under direction of Ferdinand Hassler. Sketch by Assistant John Farley - view looking to south across Long Island Sound
Connecticut shore 1837
5854 thumbnail picture
Tripod signal with tin cone for reflecting sunlight. At signal West Base, west end of Great Fire Island Base Line. Constructed by survey crews under direction of Ferdinand Hassler. Sketch by Assistant John Farley - view looking to east
Fire Island, New York 1837?
5855 thumbnail picture
Wooden tower within a tower. Outer tower supports personnel - inner tower supports instrument. First devised by Assistant Edmund Blunt to see over marshes in Delaware Bay area
1855
5856 thumbnail picture
Survey tower with signal pole and tin cone. At west end of Epping Base Line. Survey monument shows below tower. Stakes on graded surface were for aligning base measuring instruments
Maine, Epping Plains 1857
5857 thumbnail picture
Signal pole with flag and tin cone for reflecting sunlight. Epping Plains area of Maine
1857
5858 thumbnail picture
Signal at Stillpond, Maryland. Instrument height of 120 feet - top of signal 275 feet. 39th Parallel Survey. Record signal height from wooden tower
Maryland 1880?
5859 thumbnail picture
Field sketch of signal pole on tree stump. Sketch by Cephas Sinclair
Louisiana, Atchafalaya River, 1888
5860 thumbnail picture
129 foot wooden tower at Station Tate. Horse and buggy at lower right corner for scale. Triangulation party of A. T. Mosman
Ohio, Clermont County 1892
5861 thumbnail picture
Station Tate showing attached signal pole. Top of signal pole is 175 feet above ground. Triangulation party of A. T. Mosman
Ohio, Clermont County 1892
5862 thumbnail picture
Station Greene, Indiana. Instrument height is 152 feet above ground. 39th Parallel Survey. Triangulation party of George A. Fairfield
Jennings County, Indiana 1890
5863 thumbnail picture
Station Greene, Indiana. Instrument height is 152 feet above ground. 39th Parallel Survey. Triangulation party of George A. Fairfield
Jennings County, Indiana 1890
5864 thumbnail picture
Great Caspar Signal - built around tree trunk. Note boatswain chair transporting man to top. 135-foot signal --- main wood scaffold supports instrument. Tree trunk supports small scaffolding and observer at top. Western terminus of 39th Parallel Survey
Northern California 1878
5865 thumbnail picture
Wooden signal being built in Alaska.
Alaska 1943?
5866 thumbnail picture
Jasper Bilby setting up 60' reconnaissance pole. At Station Elbow - connecting with 98th Meridian Survey
Minnesota 1903
5867 thumbnail picture
John F. Hayford observing from 60' reconnaissance pole. On 98th Meridian Survey. Checking for intervisibility between stations. Helping plan for necessary height of tower at station
Minnesota 1903
5868 thumbnail picture
Jasper S. Bilby observing from short reconnaissance pole attached to tree. On 98th Meridian Survey. Checking for intervisibility between stations. Helping plan for necessary height of tower at station
Minnesota 1903
5869 thumbnail picture
Jasper S. Bilby observing from reconnaissance pole attached to tree. Top of pole is 104 feet above ground. Checking for intervisibility between stations. Helping plan for necessary height of tower at station
Minnesota 1903
5870 thumbnail picture
Beginning to erect tower at Station Hugo. Lines snapped dropping pole seconds after picture. Triangulation party of William H. Burger
The Devils Backbone, Hays County, Texas 1903
5871 thumbnail picture
Raising one side of instrument tripod at Station Hugo. Triangulation party of William H. Burger
The Devils Backbone, Hays County, Texas 1903
5872 thumbnail picture
Raising third leg of instrument tripod at Station Hugo. Triangulation party of William H. Burger
The Devils Backbone, Hays County, Texas 1903
5873 thumbnail picture
Framing first and third leg of instrument tripod at Station Hugo. Triangulation party of William H. Burger
The Devils Backbone, Hays County, Texas 1903
5874 thumbnail picture
Completed instrument tripod at Station Foss. Photo #1 of sequence
Minnesota, Wilkin County 1904
5875 thumbnail picture
First side of observer scaffolding being raised at Station Foss. Photo #2 of sequence
Minnesota, Wilkin County 1904
5876 thumbnail picture
Both sides of observer scaffolding in place at Station Foss. Photo #3 of sequence
Minnesota, Wilkin County 1904
5877 thumbnail picture
Putting ties on scaffolding at Station Foss. Photo #4 of sequence
Minnesota, Wilkin County 1904
5878 thumbnail picture
Completed tower with internal instrument tripod at Station Foss. This station took 1 and 1/2 days to complete. Photo #5 of sequence
Minnesota, Wilkin County 1904
5879 thumbnail picture
Station Pen in Washington. Triangulation party of O. B. French - occupied by J. S. Hill. Instrument was mounted on tree trunk. Instrument remained steady in azimuth but unsteady in level
Washington 1905
5880 thumbnail picture
Station Gibuson - a 68 foot tree signal. Party of John F. Pratt - off of PATHFINDER
Philippines 1910
5881 thumbnail picture
White River West Base on the 141st Meridian Survey. International Boundary Commission surveyors
Alaska-Canada Boundary 141st Meridian 1911
5882 thumbnail picture
Rock cairn signal at divide between two main forks of the Ladue River. International Boundary Commission surveyor
Alaska-Canada Boundary 141st Meridian 1911
5883 thumbnail picture
Platform and stand built between two trees on Olympic Peninsula. Note man standing on platform. Triangulation party of H. A. Seran
Olympic Peninsula, Washington 1914
5884 thumbnail picture
The crow's nest at Station Moclips - 215 feet above the ground. Note spikes driven into tree - builders would drive spikes and go hand over hand . Triangulation party of H. A. Seran. According to Seran: "It took men of uncommon nerve to do this work."
Olympic Peninsula, Washington 1914
5885 thumbnail picture
239-foot tower built on Bugsuk Island in southwest Philippines. This tower was built completely from native timber cut on location. It took 19 men off the PATHFINDER three weeks to build this signal. This was the largest wooden tower ever built by the C&GS. Used for both observing and as a signal
Philippine Islands 1915
5886 thumbnail picture
Wind tarps draping tower at Station Bippus. Wind tarps protect inner instrument tower from wind. Triangulation party of Earl O. Heaton
California, Death Valley area 1921
5887 thumbnail picture
Removing wind tarps at Station Umbarger. Wind tarps protect inner instrument tower from wind. Triangulation party of Earl O. Heaton
Randall County, Texas 1921
5888 thumbnail picture
100-foot tower at Bozeman NW Base. Note man at top. Triangulation party of William M. Scaife
Montana, Bozeman 1922
5889 thumbnail picture
115-foot tower built around tree on Sarangani Island.
Philippine Islands 1923
5890 thumbnail picture
Tower at Station Mangal. Topographic party working on the beach
Philippine Islands 1924
5891 thumbnail picture
Tower with signal flag at Station Bint. At Bihintinusa Island off the south coast of Basilan. Built by crew off the MARINDUQUE
Philippine Islands 1924
5892 thumbnail picture
Station Mangal from offshore. Built by crew off the MARINDUQUE
Philippine Islands 1924
5893 thumbnail picture
Building crew after finishing the tower. Party off the MARINDUQUE
Philippine Islands 1924
5894 thumbnail picture
Building a tower. Party off the MARINDUQUE
Philippine Islands 1924
5895 thumbnail picture
The finished tower - note guard in lower left of tower. Party off the MARINDUQUE
Philippine Islands 1924
5896 thumbnail picture
A finished large tripod signal - note the guards. Party off the MARINDUQUE
Philippine Islands 1924
5897 thumbnail picture
115-foot tower built around tree on Sarangani Island.
Philippine Islands 1923
5898 thumbnail picture
Another view of tower built around a tree on Sarangani Island
Philippine Islands 1923
5899 thumbnail picture
Small tower on a coral islet
Philippine Islands 1926?

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Last Updated:
November 10, 2017