Seattle City Light Skagit Hydroelectric Project Records, 1908-1975
Table of Contents
Overview of the Collection
- Creator
- Seattle City Light
- Title
- Seattle City Light Skagit Hydroelectric Project Records
- Dates
- 1908-1975 (inclusive)1908-19751908-1975
1921-1957 (bulk)19211957 - Quantity
- 2.0 cubic feet, (5 boxes)
- Collection Number
- 1206-12
- Summary
- Records of Seattle City Light's hydroelectric projects on the Skagit River
- Repository
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Seattle Municipal Archives
Seattle Municipal Archives
Office of the City Clerk
City of Seattle
PO Box 94728
98124-4728
Seattle, WA
Telephone: 2062337807
Fax: 2063869025
archives@seattle.gov - Access Restrictions
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Records are open to the public.
- Languages
- English
- Sponsor
- Funding for processing this record series was provided through a grant from the National Historical Publications and Records Commission.
Historical Note
City Light provides electricity and electrical and conservation services to its public and private customers. It is the largest public utility in the Pacific Northwest. Public responsibility for electrical energy dates to 1890 with creation of the Department of Lighting and Water Works. In 1902, Seattle voters passed a bond issue to develop hydroelectric power on the Cedar River under the administration of the Water Department. Electricity from this development began to serve Seattle in 1905. A City Charter amendment in 1910 created the Lighting Department. Under the leadership of Superintendent James D. Ross, the department developed the Skagit River hydroelectric project which began supplying power in 1924. Both public and private power was supplied to Seattle until 1951 when the City purchased the private electrical power supply operations, making the Lighting Department the sole supplier. The Boundary Project in northeastern Washington began operations in 1967 and supplied over half of City Light's power generation. By the early 21st century, approximately ten percent of City Light's income came from the sale of surplus energy to customers in the Northwest and Southwest with the remainder of City Light's financial support coming from customer revenue. The current name of the agency was adopted in 1978 when the Department was reorganized.
Content Description
Correspondence, reports, test data, hydrographic data, project applications, photographs , maps and related material concerning planning and construction of dams and hydroelectric generating plants on the Skagit River. Projects include Diablo, Gorge and Ross dams.
Use of the Collection
Preferred Citation
[Item and date], Seattle City Light Skagit Hydroelectric Project Records , Record Series 1206-12. Box [number], Folder [number]. Seattle Municipal Archives.
Administrative Information
Return to TopDetailed Description of the Collection
The following section contains a detailed listing of the materials in the collection.
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1206-12: Skagit Hydroelectric Project Records, 1908-1975
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Description: Bothell Substation - Ross - Bothell Transmission Line (Includes PhotographsDates: 1951-1953Container: Box/Folder 1/1
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Description: Cascade River and Copper Creek ApplicationDates: 1949Container: Box/Folder 1/2
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Description: Cost of Delay of Ross Units 42, 43 and 44Dates: 1952-1957Container: Box/Folder 1/3
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Description: Diablo - Hydraulic Calculations, Water Storage, Power ProducedDates: undatedContainer: Box/Folder 1/4
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Description: Diablo Power PlantDates: 1931-1960Container: Box/Folder 1/5
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Description: Diablo Plant - Hydroelectric GenerationDates: 1941Container: Box/Folder 1/6
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Description: Diablo ReservoirDates: 1929-1959Container: Box/Folder 1/7
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Description: Diablo - South Substation ( Includes Aerial Photographs)Dates: 1937-1965Container: Box/Folder 1/8
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Description: Diamond DrillingDates: 1935-1961Container: Box/Folder 1/9
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Description: Diamond Drilling - Maps and DiagramsDates: undatedContainer: Box/Folder 1/10
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Description: Diamond Drilling - Blueprint MapsDates: 1933-1936Container: Box/Folder 1/11
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Description: Gorge Dam and TunnelDates: 1925-1961Container: Box/Folder 2/1
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Description: Gorge Dam - General InformationDates: 1921-1960Container: Box/Folder 2/2
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Description: Gorge High Dam Study and MiscellanyDates: 1953-1962Container: Box/Folder 2/3
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Description: Gorge Hydroelectric GenerationDates: 1918-1937Container: Box/Folder 2/4
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Description: Gorge - North SubstationDates: 1935-1939Container: Box/Folder 2/5
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Description: Gorge Power PlantDates: 1921-1961Container: Box/Folder 2/6
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Description: Gorge Plant ExpansionDates: 1947-1955Container: Box/Folder 2/7
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Description: Gorge Plant Shut-Down for Tunnel Work StudyDates: 1947-1949Container: Box/Folder 2/8
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Description: Gorge ReservoirDates: 1960-1962Container: Box/Folder 2/9
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Description: Gorge Switching Station SpecificationDates: 1950Container: Box/Folder 2/10
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Description: Gorge Units PerformanceDates: 1951-1954Container: Box/Folder 2/11
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Description: Loss of Power Caused by Delay of Ross Units 44, 43 and 42Dates: 1952-1956Container: Box/Folder 2/12
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Description: Recreation, GardenDates: 1965-1967Container: Box/Folder 2/13
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Description: Ross Basin ClearingDates: 1936-1950Container: Box/Folder 2/14
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Description: Ross Basin ClearingDates: 1951-1953Container: Box/Folder 2/15
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Description: Ross Basin Clearing Photographs and NegativesDates: undatedContainer: Box/Folder 2/16
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Description: Ross Dam Additions - Addition Height, Tunnels, PenstocksDates: 1943Container: Box/Folder 2/17
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Description: Ross Dam ConstructionDates: 1933-1942Container: Box/Folder 3/1
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Description: Ross Dam ConstructionDates: 1944-1960Container: Box/Folder 3/2
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Description: Ross Dam Construction PhotographsDates: undatedContainer: Box/Folder 3/3
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Description: Ross Dam Economic StudiesDates: 1931-1943Container: Box/Folder 3/4
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Description: Ross Dam Financing and CostsDates: 1933-1946Container: Box/Folder 3/5
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Description: Ross Dam, First Step - ConstructionDates: 1939Container: Box/Folder 3/6
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Description: Ross Dam General DimensionsDates: 1936-1940Container: Box/Folder 3/7
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Description: Ross Dam General InformationDates: 1933-1960Container: Box/Folder 3/8
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Description: Ross Dam - Mr Pettits (Facts and Statistics)Dates: undatedContainer: Box/Folder 3/9
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Description: Ross Dam Priorities DataDates: 1942-1944Container: Box/Folder 3/10
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Description: Ross Dam Spillway, Discharge CurvesDates: 1952-1953Container: Box/Folder 3/11
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Description: Ross Dam Valves - WorksheetsDates: 1950Container: Box/Folder 3/12
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Description: Ross - Discharge From Gibson TestsDates: 1954Container: Box/Folder 3/13
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Description: Ross Generators - Maximum Loan TestsDates: 1956-1957Container: Box/Folder 3/14
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Description: Ross Generators - Maximum Loan TestsDates: 1956-1975Container: Box/Folder 4/1
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Description: Ross Power Plant Efficiency TestsDates: 1954-1957Container: Box/Folder 4/2
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Description: Ross Power Plant Unit 41 Turbine and Butterfly Valve Acceptance TestsDates: 1957Container: Box/Folder 4/3
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Description: Ross PowerhouseDates: 1946-1950Container: Box/Folder 4/4
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Description: Ross Reservoir (Ruby Basin)Dates: 1936-1955Container: Box/Folder 4/5
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Description: Ruby Basin Roads and TrailsDates: 1932-1946Container: Box/Folder 4/6
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Description: Ruby Dam CorrespondenceDates: 1935-1941Container: Box/Folder 4/7
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Description: Ruby Dam Design - Lars Jorgensen Correspondence and ClaimDates: 1935-1937Container: Box/Folder 4/8
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Description: Skagit - Agreement, Washington Department of FisheriesDates: 1946Container: Box/Folder 4/9
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Description: Skagit Basin Timer (US Forest Service Settlements, Canadian Timber)Dates: 1926-1951Container: Box/Folder 4/10
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Description: Skagit Basin Timber PhotographsDates: undatedContainer: Box/Folder 4/11
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Description: Skagit BoatsDates: 1948-1952Container: Box/Folder 4/12
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Description: Skagit ClippingsDates: 1957-1968Container: Box/Folder 4/13
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Description: Skagit Data, MapsDates: 1921-1956Container: Box/Folder 4/14
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Description: Skagit MapsDates: undatedContainer: Box/Folder 4/15
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Description: Skagit DevelopmentDates: 1927-1928Container: Box/Folder 5/1
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Description: Skagit Drainage Area Rain Fall and Run-OffDates: 1934-1945Container: Box/Folder 5/2
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Description: Skagit GardensDates: 1939Container: Box/Folder 5/3
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Description: Skagit HistoryDates: 1917-1935Container: Box/Folder 5/4
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Description: Skagit Hydraulics - InflowDates: 1942Container: Box/Folder 5/5
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Description: Skagit Hydro - Contracts, Agreements, FPC Form No. 45 Schedule 23Dates: undatedContainer: Box/Folder 5/6
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Description: Skagit Power Development, Diablo Dam - Proposals, SpecificationsDates: 1927Container: Box/Folder 5/7
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Description: Skagit Power Pool, Water Storage and Other Interconnection ProblemsDates: 1943Container: Box/Folder 5/8
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Description: Skagit Railroad ExtensionDates: 1919-1927Container: Box/Folder 5/9
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Description: Skagit River HydrographyDates: 1950Container: Box/Folder 5/10
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Description: Skagit River Power and Flood Control Project - Application to Administrator of Public WorksDates: 1933Container: Box/Folder 5/11
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Description: Skagit River Power Development Early Proposals, Great Northern Railway (Copies)Dates: 1908-1913Container: Box/Folder 5/12
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Description: Skagit River Power Development - Information For Preliminary Report including Load And Flow DataDates: 1942-1943Container: Box/Folder 5/13
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Description: Skagit River Project - Application to Administrator of Public Works, Exhibits, EstimatesDates: 1933Container: Box/Folder 5/14
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Description: Skagit River Project CorrespondenceDates: 1918-1919Container: Box/Folder 5/15
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Description: Skagit River Project For Power and Flood Control, Plan (includes Photographs)Dates: 1933Container: Box/Folder 5/16
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Description: Skagit River Project SummaryDates: undatedContainer: Box/Folder 5/17
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Description: Skagit Transmission Lines D-1 and D-2Dates: 1939Container: Box/Folder 5/18
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Description: Transmission Right-Of-WayDates: 1931-1944Container: Box/Folder 5/19
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Description: Turbine Flowmeters at Ross, Diablo, GorgeDates: 1957-1959Container: Box/Folder 5/20
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Description: PhotographsDates: undatedContainer: Box/Folder 5/21
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Names and SubjectsReturn to Top
Subject Terms
- Diablo Dam (Wash.)
- Gorge Dam (Wash.)
- Hydroelectric power plants--Washington
- Reservoirs--Washington
- Ross Dam (Wash.)
- Skagit River Hydroelectric Project
- Water-power--Washington
Corporate Names
- Seattle City Light
Geographical Names
- Seattle (Wash.)
- Skagit River (B.C. and Wash.)
Form or Genre Terms
- Negatives
- Photographic prints
