Cage 754

Washington Water Power (Avista Corp.)

Historic technical drawings

Collection, circa 1900-1972

Acquisition And Processing Information

Avista Corporation donated these drawings to the Washington State University Libraries in 2003 (MS 2010-23). Cheryl Gunselman processed the collection in 2010.

Extent/Quantity Information

Number of Containers: 2 boxes plus 30 rolls

Linear Feet of Shelf Space: 9

Approximate number of items: 360

Project Histories

All three projects represented in this collection are hydroelectric developments of Washington Water Power Company (now Avista Corporation), an investor-owned utility.

Monroe Street Dam: This was the first hydroelectric development completed by Washington Water Power Company, at a natural waterfall on the Spokane River; it began generating power in 1890. The dam was rebuilt in 1974.

Nine Mile Dam: This project, originally developed in 1908 to supply power for the Spokane and Inland Empire electric railway system, was purchased by Washington Water Power Company in 1925.

Long Lake Power Station: Another early hydroelectric development, the Long Lake Dam was completed in 1915.

Collection Description

The collection consists of approximately 360 technical drawings related to three Avista Corporation hydroelectric developments on the Spokane River: Nine Mile Dam (at Nine Mile Falls on the Spokane River), Monroe Street Dam (in downtown Spokane), and the Long Lake Power Station (about 30 miles northwest of Spokane). It includes a wide range of drawing types, from architectural plans to designs for individual equipment parts.

Collection Arrangement

The collection is arranged in three series, by project:

All items have been kept in the arrangement created by Avista Corporation, in groups of rolled and flat drawings, each consisting of items related to a single development. The original roll numbers assigned by Avista have been retained.

A detailed list of the collection contents, with an itemized list of most of the individual drawings, is included in the collection (Box 1).


Avista Corp. — Archives
Hydroelectric power plants — Design and construction
Hydroelectric dams — Washington (State)
Electric power production — Washington (State)
Construction drawings
Design drawings
Mechanical systems drawings


This collection is open and available for research use. Reproduction of some items, particularly large fragile drawings, may be limited.

Rights note, July 2003: "Avista Corporation reserves a perpetual, royalty-free license with the right to use, copy or sublicense any and all intellectual property associated with the sujbect collection which Avista Corporation holds at the time of this assignment, including any copyrights and any derivative works to be completed in the future."

Preferred Citation

The suggested citation for the collection is:

[Item Description]
Washington Water Power (Avista Corp.) historic technical drawings collection
Manuscripts, Archives, and Special Collections
Washington State University Libraries
Pullman, WA

Related Materials

Washington Water Power Company papers, 1888-1965 (Cage 297). Collection guide available here: Cage 297.

Washington Water Power Company informational kits, circa 1954 (Cage 91).

Huntington family papers, circa 1921-1950 (Cage 4864).

Location Note (MASC Staff Use)

Boxes are located in main Cage sequence. Rolled drawings are stored separately.


Items are in English.

Container List:

Container Description
  Series 1: Monroe Street Dam
Box 1 Monroe Street dam drawings
Rolls 3-7 Monroe Street dam drawings
Roll 9-15 Monroe Street dam drawings
Box 2 Monroe Street dam drawings
Rolls 16-26 Monroe Street dam drawings
Rolls 27-30 Monroe Street dam drawings
  Series 2: Nine Mile Dam
Roll 1 Sanderson and Porter drawings
Roll 2 Westinghouse drawings
Box 2 Other Nine Mile Dam drawings
  Series 3: Long Lake Power Station
Roll 8 Long Lake Power Station drawings
Box 2 Long Lake Power Station drawings
Box 1 Detailed list of collection contents (2003)