Archives West Finding Aid
Table of Contents
Seattle City Light Load and Flow Data, 1905-1995
Overview of the Collection
- Creator
- Seattle City Light
- Title
- Seattle City Light Load and Flow Data
- Dates
- 1905-1995 (inclusive)19051995
- Quantity
- 10.4 cubic feet, (11 boxes)
- Collection Number
- 1206-11
- Summary
- Data from City Light hydroelectric projects.
- Repository
-
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
-
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 NoteReturn to Top
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 DescriptionReturn to Top
Records of the Power Management Branch, consisting of data on stream discharge and flows, lake and reservoir elevations, energy generation, load estimates and forecasts, and power studies on system capability. Data pertains to the Skagit Basin, Cedar River, Boundary Dam and other sources.
Flow data for Boundary Dam may also be found in Boundary Dam Project Records, series 1206-07.
Use of the CollectionReturn to Top
Preferred Citation
[Item and date], [Seattle City Light Load and Flow Data , Record Series 1206-11. Box [number], Folder [number]. Seattle Municipal Archives.
Administrative InformationReturn to Top
Detailed Description of the CollectionReturn to Top
The following section contains a detailed listing of the materials in the collection.
1206-11: Load and Flow Data, 1905-1995Return to Top
Container(s) | Description | Dates |
---|---|---|
Box/Folder | ||
1/1 | Big Beaver Creek
Measurement |
1934-1942 |
1/2 | Cedar River
Hydrography |
1909-1931 |
1/3 | Cedar River
Hydrography |
1905-1933 |
1/4 | Cedar River
Hydrography |
1919-1933 |
1/5 | Cedar River
Hydrography |
1919-1934 |
1/6 | Cedar River
Hydrography |
1905-1934 |
1/7 | Cedar River Daily
Discharges |
1963-1964 |
1/8 | Cedar River Daily
Discharges |
1960-1963 |
1/9 | Cedar River Annual Runoff
Summary |
1926-1940 |
1/10 | Cedar Lake Water
Elevations |
1919-1920 |
1/11 | Cedar Lake Stream
Gaging |
1945 |
1/12 | Daily Discharge Tables -
USGS |
1932-1962 |
1/13 | Diablo Lake, Cedar Lake, Ruby
Storage Dams Elevations |
1919-1946 |
1/14 | Diablo Lake
Elevations |
1928-1935 |
1/15 | Diablo Lake
Elevations |
1929-1960 |
1/16 | Diablo Lake Storage, Daily
Change |
1932-1937 |
1/17 | Diablo Lake Water
Levels |
1929-1940 |
1/18 | Diablo Reservoir
Hydrographs |
1929-1937 |
1/19 | Diablo Reservoir - Skagit
Runoff, July 1 to June 30, 39 years (unregulated) |
1946-1963 |
1/20 | Diablo Reservoir - Skagit
Runoff, Aug 1 to July 31, 39 year (unregulated) |
1946-1963 |
1/21 | Diablo Reservoir - Skagit
Runoff, Oct 1 to Sep 30, 40 year (unregulated) |
1945-1963 |
1/22 | Diablo Reservoir Water
Levels, Discharge |
1931-1955 |
1/23 | Annual Runoff At Ferry
Bar |
1935-1959 |
1/24 | Annual Runoff At Ferry
Bar |
1935-1936 |
1/25 | Ferry Bar Flow
computations |
1950-1956 |
1/26 | Ferry Bar Flow
computations |
1945-1949 |
1/27 | Monthly Discharge At Ferry
Bar |
1953-1954 |
1/28 | Gorge (Newhalem) Annual
Runoff |
1930-1963 |
1/29 | Gorge (Newhalem) Annual
Runoff |
1929-1933 |
1/30 | Annual Runoff at Gorge -
Newhalem Stream Gaging Station Remote Registration |
1946-1948 |
1/31 | Annual Inflows Between Ross
and Diablo |
1950-1962 |
1/32 | Annual Inflows Between Ross
and Newhalem |
1953-1962 |
1/33 | Ross Dam Annual
Runoff |
1946-1958 |
1/34 | Hydrographs of Skagit at Ross
Dam Site |
1919-1953 |
1/35 | Ross Dam - Mass Diagram
Data |
1933-1942 |
1/36 | Ross Lake
Elevations |
1928-1940 |
1/37 | Ross Lake
Elevations |
1940-1966 |
1/38 | Skagit Runoff - Ross
Reservoir, July 1 to June 30, 39 Years (Unregulated) |
1946-1963 |
1/39 | Skagit Runoff - Ross
Reservoir, August 1 to July 31, 39 Years (Unregulated) |
1946-1963 |
1/40 | Skagit Runoff - Ross
Reservoir, Oct 1 - Sep 30, 40 Year (Unregulated) |
1942-1964 |
2/1 | Ross Reservoir Pondage and
Stream Flow Study |
1927 |
2/2 | Ross Reservoir |
1931-1951 |
2/3 | Ross Reservoir Spillway,
Preliminary Study |
1944 |
2/4 | Skagit River Above Devil's
Elbow Measurement |
1940-1941 |
2/5 | Skagit River At Reflector
Bar |
1914-1943 |
2/6 | Skagit Below Ruby,
Flows |
1939-1944 |
2/7 | Skagit - Bert De Shaw's
Notes |
1932-1942 |
2/8 | Skagit - British Columbia
Discharge Notes |
1932-1954 |
2/9 | Skagit Below Ruby Discharge
Sheets and Thunder Creek Gage Heights |
1925-1930 |
2/10 | Skagit Above Ruby, Gage
Height |
1931-1934 |
2/11 | Skagit
Hydrography |
1947-1948 |
2/12 | Skagit
Hydrography |
1948-1949 |
2/13 | Skagit
Hydrography |
1949-1950 |
2/14 | Skagit
Hydrography |
1950-1951 |
2/15 | Skagit
Hydrography |
1951-1952 |
2/16 | Skagit
Hydrography |
1952-1953 |
2/17 | Skagit
Hydrography |
1953-1954 |
2/18 | Skagit
Hydrography |
1954-1955 |
2/19 | Skagit
Hydrography |
1955-1956 |
2/20 | Skagit
Hydrography |
1956-1957 |
2/21 | Skagit
Hydrography |
1957 |
2/22 | Skagit
Hydrography |
1958-1959 |
2/23 | Skagit Runoff
Data |
1939-1941 |
2/24 | Skagit Runoff
Summaries |
1952-1958 |
2/25 | Skagit Runoff -
Diablo |
1933-1960 |
2/26 | Skagit Streamflow |
1928-1948 |
2/27 | Skagit Stream
gaging |
1931-1948 |
2/28 | Skagit Stream gaging -
Thunder Creek and Newhalem Creek |
1962-1963 |
2/29 | Skagit - Fisheries Minimum
Flow Agreement |
1980-1981 |
2/30 | Skagit - Fisheries Minimum
Flow Agreement |
1973-1979 |
2/31 | Skagit - Fisheries Minimum
Flow Agreement |
1974-1981 |
2/32 | British Columbia Stream
Gaging |
1941-1957 |
2/33 | Skagit River British Columbia
and Dominion River Stage Gages - Photographs and Notes |
1954 |
2/34 | Low Water Complaint -
Darigold Creamery At Burlington |
1949 |
2/35 | Summary Info For Northwest
Power Pool - Skagit and Cedar Lake Runoff |
1953-1955 |
2/36 | Northwest Power Pool Flow
Data - 25 Year Record, Skagit and Cedar Rivers |
1953-1954 |
2/37 | Northwest Power Pool Flow
Data - 27 Year Record |
1956 |
3/1 | Northwest Power Pool Flow
Data - 29 Year Record Skagit and Cedar Rivers |
1956-1958 |
3/2 | Northwest Power Pool Flow
Data - 31 Year Record Skagit and Cedar Rivers |
1960 |
3/3 | Northwest Power Pool Flow
Data - 33 Year Record Skagit and Cedar Rivers |
1960-1964 |
3/4 | Stream gaging and Hydrography
Correspondence (Includes Photographs) |
1935-1946 |
3/5 | Conversion, AC to DC,
Annual |
1920-1957 |
3/6 | Conversion and
Self-Consumed |
1963-1964 |
3/7 | Current Used In
Operation |
1963-1964 |
3/8 | Generated KW and
Power |
1926-1946 |
3/9 | Load Studies |
1920-1950 |
3/10 | Load Studies |
1930-1959 |
3/11 | Operating
Statistics |
1915-1961 |
3/12 | Daily Load Curves |
1934-1961 |
3/13 | Daily Load Curves |
1939-1963 |
3/14 | Federal Secondary Energy
Combined With Boundary and Skagit |
1962 |
3/15 | Special 36-37 Analyses -
Gorge Tunnel |
1962 |
3/16 | Load / Flow Reports and
Summaries |
1971-1972 |
3/17 | Load Data |
1937-1946 |
3/18 | Load Data Reports |
1943-1948 |
3/19 | Future Growth Forecasts,
Curves |
1935-1938 |
3/20 | Load Data |
1972 |
3/21 | Load Data Book |
1928-1950 |
3/22 | Hydro System
Out-Put |
1939-1940 |
3/23 | Flow of Power - Account Form
- Annual Records |
1926-1951 |
3/24 | Flow of Power - Account
Form |
1941 |
3/25 | Flow of Power - Annual
Records |
1920-1943 |
3/26 | Flow of Power
Summary |
1963-1964 |
3/27 | Load Data |
1940 |
3/28 | Load Data (1,2,3,4) Original
Sheets |
1959 |
3/29 | Load Data
(1,2,3,4) |
1963 |
3/30 | Load Data
(1,2,3,4) |
1964 |
3/31 | Load Data |
1913-1962 |
3/32 | Load Data |
1963 |
3/33 | Load Data |
1964 |
3/34 | Load Forecasts |
1944-1945 |
3/35 | System Forecasts |
1946 |
3/36 | System Load
Curves |
1937-1950 |
3/37 | Ship Yard and System Load
Curves |
1918-1919 |
3/38 | Maximum Load
Demands |
1917-1939 |
3/39 | Load Durations and Energy
Curves |
1959-1961 |
3/40 | Load Frequency Graphs, Load
Curves - Seattle and Tacoma |
1963 |
3/41 | Load Frequency Graphs, Load
Curves - Seattle and Tacoma |
1964 |
3/42 | Load Frequency Graphs, Load
Curves - Seattle and Tacoma |
1965 |
3/43 | Load Frequency Graphs, Load
Curves - Tacoma |
1966 |
4/1 | Operating Conditions, Load
Curves |
1941-1942 |
4/2 | Operating Reports |
1942 |
4/3 | Operating Condition Reports -
Interchange, BPA Allocations |
1969 |
4/4 | Operating Condition Reports -
Interchange, BPA Allocations |
1970 |
4/5 | Net Seattle Load,
Monthly |
1948-1965 |
4/6 | Net System Weekly
Load |
1950-1964 |
4/7 | Coordinated Operation Report
- Loads and Resources |
1963-1964 |
4/8 | Coordinated Operation Report
- Loads and Resources |
1964-1965 |
4/9 | Coordinated Operation
Report |
1965 |
4/10 | Transit System |
1963-1964 |
4/11 | Daily Load
Worksheet |
1989 |
4/12 | Daily Load
Worksheet |
1990 |
4/13 | Daily Load
Worksheet |
1990 |
4/14 | Daily Load
Worksheet |
1990 |
4/15 | Daily Load
Worksheet |
1990 |
4/16 | Daily Load
Worksheet |
1991 |
4/17 | Daily Load
Worksheet |
1991 |
4/18 | Daily Load
Worksheet |
1992 |
4/19 | Daily Load
Worksheet |
1992 |
4/20 | Daily Load
Worksheet |
1992 |
4/21 | Daily Load
Worksheet |
1993 |
4/22 | Daily Load
Worksheet |
1993 |
5/1 | Daily Load
Worksheet |
1993 |
5/2 | Daily Load
Worksheet |
1994 |
5/3 | Daily Load
Worksheet |
1994 |
5/4 | Daily Load
Worksheet |
1994 |
5/5 | Daily Load
Worksheet |
1995 |
5/6 | Daily Load
Worksheet |
1995 |
5/7 | Daily Load
Worksheet |
1995 |
5/8 | Kilowatt Hour Production
Statements |
1920-1941 |
5/9 | Load Data, Annual (FPC -
12E) |
1952-1974 |
5/10 | Boundary Plant Generation
Summaries |
1974-1975 |
5/11 | Columbia, Kootenay and Pend
Oreille River Regulation, for Rev. Base With Full Storage |
1961 |
5/12 | FPC Power Statements (Form
12E-1) |
1974 |
5/13 | Bonneville Power
Administration Statements |
1974 |
5/14 | Bonneville Power
Administration Letters re Computed Demand |
1974-1975 |
5/15 | Bonneville Power
Administration Allocation Table No. 32 |
1962-1963 |
5/16 | Allocation Tables and
Correspondence |
1964-1973 |
5/17 | Snoking Loss Data |
1967 |
5/18 | Special Jobs
(Calculations) |
1966-1975 |
5/19 | Completed Assignment
(Calculations, etc.) |
1961-1970 |
5/20 | Load Forecast For Northwest
Power Pool |
1959-1965 |
5/21 | Load Estimating For Northwest
Power Pool |
1955-1965 |
5/22 | Load Estimates For Northwest
Power Pool |
1964-1965 |
5/23 | Load Estimates For Northwest
Power Pool, July 1963 - June 1965 |
1963 |
5/24 | Loads, Actual and
Estimated |
1968-1969 |
5/25 | Reservoir Operation and
Calculations - Seattle and Tacoma |
1958 |
5/26 | Regulation Studies - Hydro
Capabilities |
1936-1959 |
5/27 | Computed Demand,
Loads |
1956-1961 |
5/28 | Computed Demand
Studies |
1957-1958 |
5/29 | Computed Demand Studies With
and without Ross 4th Unit |
1956 |
5/30 | Computed Demand
Programs |
1961-1973 |
6/1 | Capability Studies -
Loads |
1956-1961 |
6/2 | Seattle and Tacoma Load
Estimates |
1956-1963 |
6/3 | Seattle and Tacoma Load
Estimates |
1957 |
6/4 | Capability Studies By Tacoma
Public Utilities |
1960-1962 |
6/5 | Seattle Capabilities In
Regard To Combined Seattle - Tacoma Contract With BPA |
1943-1944 |
6/6 | Capability Studies -
System |
1950 |
6/7 | Capability Studies - Total
System |
1947-1950 |
6/8 | Capability Studies - Total
System |
1947-1950 |
6/9 | Capability Data |
1930-1948 |
6/10 | Seattle and Tacoma Systems
Computed Demands |
1937-1952 |
6/11 | Seattle and Tacoma Systems
Computed Demands |
1937-1952 |
6/12 | Priest Rapids Critical Year
Capability |
1963-1964 |
6/13 | Capability Studies -
Ross |
1947-1950 |
6/14 | System Capability, Without
Ross Dam |
1937-1942 |
6/15 | System Capability, With Ross
Dam To 1380' |
1942-1943 |
6/16 | System Capability, With Ross
Dam To 1525' |
1942-1947 |
6/17 | System Capability, Ross Dam
To Various Elevations |
1937-1945 |
6/18 | System Capability, Ross Dam
To Various Elevations |
1930-1949 |
6/19 | System Capability, Ross Dam
To Various Elevations |
1950 |
6/20 | System Capability, Ross Dam
To Various Elevations |
1949-1950 |
6/21 | System Capability, Ross Dam
To Various Elevations |
1949 |
6/22 | System Capability, Ross Dam
To Various Elevations |
1944-1950 |
6/23 | System Capability, Ross Dam
To Various Elevations |
1937-1944 |
6/25 | System Capability, Ross Dam
To Various Elevations |
1937-1951 |
6/26 | System Capability Without
Ross Dam |
1934-1940 |
6/27 | System Capability, With Ross
To 1380' |
1939-1941 |
6/28 | System Capability, With Ross
Dam To 1525' |
1942 |
6/29 | System Capability, With Ross
Dam To 1600' |
1946 |
6/30 | System Capability, With Ross
Dam To 1630' |
1944 |
6/31 | High Ross Dam and Columbia
River Study Summaries |
1962 |
6/32 | High Ross Dam Capability
Study Coordinated With Base System Study |
1962 |
6/33 | High Ross Dam and Columbia
River Study |
1962 |
6/34 | Columbia, Kootenay, Pend
Oreille and Skagit Rivers Regulation |
1962 |
7/1 | Loss Incurred by Coordination
Agreement |
1963-1964 |
7/2 | Coordination Study of Federal
- Tacoma Hydro Systems |
1963 |
7/3 | Northwest Power Pool Hydro
Probability Study |
1963 |
7/4 | Northwest Power Pool Hydro
Probability Study |
1964 |
7/5 | Northwest Power Pool Hydro
Probability Study |
1964 |
7/6 | Northwest Power Pool Hydro
Probability Study |
1964 |
8/1 | Load Computations and System
Load Data |
1936-1941 |
9/1 | Boundary Base Duration
Curves |
1961-1971 |
9/2 | System Power Study - Base
System (Sequence VI) |
1960 |
9/3 | Power Study - Base System
(Sequence VI) - BPA |
1958 |
9/4 | Power Study - Base System
Plus Mica, Arrow Lakes, and Duncan Lake, BPA |
1960 |
9/5 | Power Study - Sequence III-J
Columbia River Base System With Mica, High Arrow Lakes and Duncan
Lake |
1960 |
9/6 | Power Study - Columbia River
Base System Plus |
1960 |
9/7 | Power Study - Hydro
Regulation 75-14 U.S. Storage Only |
1964 |
9/8 | Power Study - Hydro
Regulation 75-11 U.S. Storage Only |
1964 |
10/1 | Discharge Data - Sauk River
Above Whitechuck, 1912-1982 |
undated |
10/2 | Discharge Data - Wynoochee
River / Lake, 1966-1982 |
undated |
10/3 | Discharge Data - Calawah
River Near Forks, 1898-1979 |
undated |
10/4 | Discharge Data - Hoh River At
US 101, 1961-1979 |
undated |
10/5 | Discharge Data - Soleduck
River Near Fairholm, 1918-1980 |
undated |
10/6 | Discharge Data - Trout Lake
Creek, 1910-1969 |
undated |
10/7 | Discharge Data - White Salmon
River, 1959-1969 |
undated |
10/8 | Discharge Data - White Salmon
River, 1957-1979 |
undated |
10/9 | Seattle and Tacoma Systems
Computed Demand Studies, 1961-1976 |
undated |
10/10 | Computer Studies
Tabulations |
1955-1958 |
10/11 | Seattle and Tacoma BPA
Computed Demands, 1961-1976 |
1961 |
10/12 | Northwest Power Pool
1960-1961 Hydro Probability Study |
1960 |
10/13 | Study of Skagit and Boundary
Capabilities, Water years 1928-1948 |
1959 |
10/14 | Study of Skagit and Boundary
Capabilities, Water years 1928-1948 |
1959 |
11/1 | Discharge Data - Dewatto,
1959-1981 |
undated |
11/2 | Discharge Data - Dow Creek,
1950-1954 |
undated |
11/3 | Discharge Data - Nooksack
River, 1956-1979 |
undated |
11/4 | Discharge Data - Bacon Creek,
1943-1950 |
undated |
11/5 | Discharge Data - Skookum
Creek Near Wickersham, 1950-1969 |
undated |
11/6 | Discharge Data - Big Quilcene
River, 1971-1981 |
undated |
11/7 | Discharge Data - South fork
Tolt River, 1961-1981 |
undated |
11/8 | Discharge Data - Morse Creek
Near Port Angeles, 1967-1979 |
undated |
11/9 | Discharge Data - Snow Creek,
1952-1979 |
undated |
11/10 | Discharge Data - North Fork
Stillaguamish, 1928-1979 |
undated |
11/11 | Discharge Data - Pend Oreille
River Near International Boundary, 1967-1983 |
undated |
11/12 | Power Study |
1985 |
11/13 | Power Study |
1984 |
Names and SubjectsReturn to Top
Subject Terms
- Cedar River (King County, Wash.)
- Electric power--Washington--Seattle
- Pend Oreille River
- Reservoirs--Washington (State)
- Rivers--Washington (State)
- Ross Dam (Wash.)
- Skagit River (B.C. and Wash.)
- Skagit River Hydroelectric Project
- Streamflow--Washington (State)
Corporate Names
- Seattle City Light
- Seattle (Wash.). Lighting Dept.
- Tacoma (Wash.). Dept. of Public Utilities
Geographical Names
- Seattle (Wash.)