Includes diagrams, sketches, and details of buildings in Hamilton, warehouses, the Kerr Dam, the Hammond Building and the Northern Pacific Hospital.

Includes building details, one unknown floor plan, a plan for a dairy barn, and plans for the Home Economics Department at Missoula County High School.

Plans and details for various parts of Clark's Dam and surrounding areas.

Plans and details for various parts of Clark's Dam, a drawing of the dam and vicinity after the 1908 flood, and plans for reconstruction after that flood.

Plans for Bonner dam; big Blackfoot Milling Co. Dam; a dam near Ovando, Montana; and a proposed dam at Plateau.

Plans for Skalkaho Dam in Hamilton, Montana; Hauser Lake Dam in Helena; the Madison River dam; and the Bonner dam.

These are mostly concerned with ownership of lands in Missoula County, including the Rattlesnake Valley, Montana Power Company Rates, and water division. There are also survey notes from Waterworks Dam, drawings of the Rattlesnake Creek pipeline, a sketch of the Orr property in the Rattlesnake Valley, and information about a change at the corner of Alder and Higgins streets in Missoula.

These are drawings for electrical equipment from the Missoula Public Service Company, the Montana Power Company, and the old Bonner plant.

These are detailed drawings of electrical equipment, many related to MPC dams.

Drawings and details of governors in dams.

Detailed plans for turbines and an exciter.

General and detailed plans for turbines in several different dams.

Drawings of equipment for dams and mining.

This is a detailed drawing of the sixteen-inch pipe in Clark's Dam.

Water flow devices, including sluice gates and penstock gates, for Bonner Dam and Clark's Dam.

These drawings are all of outdoor light fixtures in Missoula. They include lights used on Main Street, Cedar Street, and Higgins Avenue.

This drawing shows the outline for an arc lamp column.

These include plans and detailed drawings of water and steam delivery systems, including steam plants, steam turbines and water mains in Hamilton and Missoula. Many of these show downtown Missoula, including the Higgins Avenue and Front Street area and the Florence Hotel.

Most of these drawings show plans for boilers and water systems. Included are the plans for the heating system at the Missoula Mercantile.

These maps show heating and water systems in downtown Missoula, Ravalli County, Hamilton, and the Missoula Mercantile Company.

These drawings of irrigation systems contain, most notably, a map of the Skalkaho tract of the Bitterroot stock farm that shows ownership in 1909.

These include a drawing of the Bitterroot Irrigation Company's canals in the Bitterroot Valley.

These maps are all of Hamilton, including a series of 1914 Sanborn Fire Insurance Maps.

These include maps of Corvallis, Darby, Florence, Hamilton, Stevensville, Victor, and Wood Side.

These maps of Milltown/Bonner include details on Riverside, the LaPointe place, the street lighting project of 1958, and one map that shows property owners.

These maps include Riverside and plats of the Thibadeau and Poitres tracts.

These maps include details of the old townsite of Missoula, the Woody addition, Bank Street, a city ward map from 1959, and details of electric pole lines.

These maps of Missoula include those showing trolley lines, Orchard Homes, the cemetery, the Garden City Brewing property, the County Fairgrounds, Pattee Canyon, Fort Missoula, and Kiwanis Park.

These include maps of roads at the university and documentation of electrical circuits.

These include a series of maps of ownership and streams, a 1930 map of Alberton, a map of territory served by the Washington Water and Power Company, a map of a Coeur D'Alene mining district, and a Forest Service map of Region 1.

These maps are of Ravalli County, Hellgate Canyon, Plains, the property of Missoula Light and Water Company, and a number of Forest Service maps. There are also three 1880s survey maps.

These documents show power lines in Hamilton-Darby, Alberton, Missoula, Florence-Hamilton, and Victor. There are also detailed maps of transmission systems and pole details like cross-arms.

These documents detail power lines near Stevensville, Hamilton, Missoula, Orchard Homes and Fort Missoula, and Lolo.

This group of documents shows details of power substations at Missoula, the Old Bonner Plant, and the switchboard wiring at Missoula Light and Water Co. Plant in Bonner.

This series includes a sketch of a proposed plant in Hamilton, a detail of the Thompson Falls plant, a transformer building plan for Missoula Light and Water Company, and one unidentified document.

This series provides information on the Northern Pacific Railroad, the Chicago Milwaukee, and the Clark Montana and S.P. Railway.

Documents in this series relate to the Northern Pacific Railroad, the Clark Montana Railway, and the Chicago Milwaukee Railway.

This group of maps of the Rattlesnake Creek drainage include those of McKinley Lake, Worden Lake, the picnic grounds, the Missoula water system, and the damsites for McKinley Lake, Lily Lake, and Carter Lake.

This series includes a plat of the Missoula Light and Water Company's property, water rights on Rattlesnake Creek, and McKinley Lake, Worden Lake, and Lily Lake.

This group of documents details the Rattlesnake drainage water system.

This series details the Rattlesnake drainage water system, particularly the 30-inch wooden pipe.

This series includes maps of the Missoula River (the Clark Fork River), including details of damage after the 1909 flood.

Most items in this series relate to land required to right-of-way for the construction of Interstate 90.

Materials in this series mostly relate to water flow in the Missoula River (Clark Fork River), the Missouri River, the Bitterroot River, the Catawba River, the Jefferson River, the Madison River, the big Blackfoot River, and the Yellowstone River. Other documents relate to flow levels at various dams.

Most of these documents relate to flume tests and other flow documentation at dams.

This series consists of documents relating to trolley equipment of the Missoula Street Railway Company.

This series consists of documents relating to trolley equipment of the Missoula Street Railway Company.

This series contains documents that show rights of way, routes, and road crossings of the Missoula Street Railway Company, including the lines to Bonner and Fort Missoula. There is also a drawing of a scene of a 1914 accident.

Documents in this series show rights-of-way for the Missoula Street Railway Company.

These records include details of fuel received and consumed, number of customers, and number of hours of operation, by month, for the Missoula steam plant.