Archives West Finding Aid
Table of Contents
Milltown Dam Collection, 1906-2007
Overview of the Collection
- Title
- Milltown Dam Collection
- Dates
- 1906-2007 (inclusive)19062007
- Quantity
- 19.75 linear feet
- Collection Number
- Mss 907
- Summary
- The Milltown Dam was a hydroelectric dam located seven miles east of Missoula, Montana, at the confluence of the Clark Fork River and Blackfoot River near Milltown and Bonner, Montana. This collection contains records from a variety of sources documenting the dam's operation and impact from 1906-2006. The dam was removed in 2008.
- Repository
-
University of Montana, Mansfield Library, Archives and Special Collections
Archives and Special Collections
Maureen and Mike Mansfield Library
University of Montana
32 Campus Dr. #9936
59812-9936
Missoula, MT
Telephone: 406-243-2053
library.archives@umontana.edu - Access Restrictions
-
Researchers must use collection in accordance with the policies of Archives and Special Collections, the Maureen and Mike Mansfield Library, and The University of Montana-Missoula.
- Languages
- English
Historical NoteReturn to Top
The Milltown Dam was a hydroelectric dam located seven miles east of Missoula, Montana, at the confluence of the Clark Fork and Blackfoot rivers near Milltown and Bonner, Montana. William A. Clark, a renowned copper mine investor and U.S. Senator, built the dam in 1908, to power his sawmill located in the town of Bonner, Montana before its electrical services were extended to the surrounding communities. In 1929, Montana Power Company purchased the dam from Clark and operated it until 2003, when Northwestern Energy assumed ownership of the dam as part of a collective purchase of Montana Power Company's electric and gas network.
A few months after the dam was built, a flood washed toxic mine waste from the Anaconda Copper Mining Company's work site near Butte, Montana, 126 miles downstream before it settled in the newly formed reservoir behind the Milltown Dam. The severity of the toxic waste accumulation was not realized until 1981, when the Montana Department of Health and Environmental Science conducted its bi-annual water quality study that found high concentrations of arsenic in four residential wells in Milltown, Montana. This led to approximately 120 miles of the Clark Fork River being added to the Environmental Protection Agency's (EPA) National Priorities List (NPL), commonly referred to as a Superfund site, in September of 1983. The Milltown Dam was designated as one of three Operable Units (OU), a distinct area designated within a larger Superfund cleanup site, on the Clark Fork River. Over the next quarter of a century research and investigation into possible methods of containment, remediation, and restoration ensued as part of the most expensive Superfund cleanup operations in United States History at that time costing approximately $100 million.
Following the Milltown Dam's 1983 listing, local, state, and federal resources were focused on the containment of harmful mining waste until 1996, when a severe ice jam on the Blackfoot River scoured the reservoir's toxic sediments leading to increased public safety concerns. As a result, the EPA decided that the complete removal of the dam was the best plan of action. In 2006, contaminated sediments were moved to a disposal site in Opportunity, Montana, and the dam was removed in 2008.
Following the dam's removal, efforts to restore the watershed at the confluence of the Blackfoot and Clark Fork rivers began, and the area was designated as the 500-acre Milltown State Park. The park offers interpretive sites, historical information, and outdoor recreation opportunities. In addition to public access, efforts were made to restore native vegetation in the Clark Fork and Blackfoot river flood plains.
Content DescriptionReturn to Top
The Milltown Dam Collection contains official and unofficial records about the dam and its operation from a variety of record creators. The collection includes reports, pamphlets, receipts, logbooks and photographs of energy output, construction, breakdowns, and maintenance work carried out on the dam. It also includes safety and licensing records required by the Federal Energy Regulatory Commission.
Records in the collection include those created by William A. Clark's affiliated companies between 1908 and 1929, the Montana Power Company, which owned and operated the dam between 1929 and 2003, and Northwestern Energy, which owned and operated the project from 2003 until its shutdown in 2006.
The collection also contains risk assessment and remedial action plan reports that were generated as part of the Superfund cleanup process. This includes reports generated by third party researches, private businesses, and local, state, and federal government agencies. Also included in the collection is a record of public commentary surrounding the Superfund cleanup process. The removal of the dam is documented mainly in audiovisual formats. This includes photographs of the powerhouse shutdown, an audio recording conducted by Missoula County Environmental Health Supervisor Peter Nielson, and video footage created by Missoula Community Access Television. Missoula Community Access television and Montana Power Company videos concerning the dam's history, ice jams, and the cleanup process are also housed in this collection.
Use of the CollectionReturn to Top
Restrictions on Use
Researchers are responsible for using in accordance with 17 U.S.C. and any other applicable statutes. Non-exclusive copyright in a portion of the collection material was transferred to the University of Montana.
Preferred Citation
Milltown Dam Collection, Archives and Special Collections, Maureen and Mike Mansfield Library, University of Montana-Missoula.
Administrative InformationReturn to Top
Arrangement
This collection has been arranged into seven series, many with subseries.
Series I: Drawings and Prints, 1906-1998, 0.5 linear feet
Series II: Reports and Logbooks, 1929-2005, 9.75 linear feet
Sub-series I: Daily Reports and Logs, 1951-2002, 8.0 linear feet
Sub-series II: Monthly Reports and Logs, 1945-2005, 1.0 linear feet
Sub-series III: Hourly Logs, 1978-1986, 0.25 linear feet
Sub-series IV: Monthly Generation Reports, 1972-2002, 0.25 linear feet
Sub-series V: Generator Outage Reports, 1977-2005, 0.25 linear feet
Sub-series VI: Monthly Storage Battery Reports, 1987-2002, 0.1 linear feet
Series III: Parts Information and Maintenance Records, 1906-2005, 2.75 linear feet
Series IV: Dam Safety Records, 1972-2006, 2.0 linear feet
Series V: Environmental Protection Agency Superfund Cleanup Materials, 1970-2005, 3.75 linear feet
Series VI: Photographs, 1907-2007, 1.0 linear feet including 2 CDs
Sub-series I: Milltown Dam Photographs, 1907-2003, 0.75 linear feet
Sub-series II: Kristi Hager Photographs, Undated, 1 folder
Sub-series III: Dam and Powerhouse Shutdown, 2006, 2 CD's
Series VII: Audiovisual Materials, 1997-2006, 1 CD and 13 DVD's
Sub-series I: Audio Recordings, 2006, 1 CD
Sub-series II: Video Recordings, 1996-2006, 13 DVD's
Custodial History
This collection contains materials from accessions 2007-019, 2007-020, 2008-015, 2010-007, 2012-030, 2012-050, and 2014-054. Contact the Archives for details.
Acquisition Information
The materials in this collection were transferred to the Archives by Missoula County Environmental Health Supervisor, Peter Nielson, and Northwestern Energy.
Processing Note
These accessions were donated to the University of Montana's Archives and Special Collections with the understanding and intent that they would brought together as the Milltown Dam Collection. Original creator is indicated within each series. Duplicates were removed from the collection. Original order, when it existed, was maintained within series and sub-series.
Detailed Description of the CollectionReturn to Top
Series I: Drawings and Prints, 1906-1998Return to Top
This series contains large drawings and prints used in construction and maintenance projects. These materials were created and stored by the owners and operators of the Milltown Dam. At times related materials are grouped together in this series, but because specialized knowledge is required to accurately organize the materials in this series, the prints and drawings have been left in their original order. A drawing number key, located in box two folder one of this series, corresponds with most of the early drawings in this series up through the 1930s. Later drawings possess similar numerical identifiers, but the University of Montana Archives and Special Collections does not have the corresponding key.
Container(s) | Description | Dates |
---|---|---|
Box/Folder | ||
2/1 | Drawing Number Key for Series I: Drawings and Prints, 1906-1998 |
Undated |
drawer-folder | ||
VIII-9/1 | Scraps from Montana Power Company Drawings |
1988 |
VIII-9/1 | Plan for Power House |
1906 |
VIII-9/1 | Power House Sections and Floor Plans |
1907 |
VIII-9/1 | Wiring Diagram |
1907 |
VIII-9/1 | Conduit Wiring |
1907 |
VIII-9/1 | Toe of Dam |
1909 |
VIII-9/1 | Power House |
1908 |
VIII-9/2 | Bearing Details for Countershaft, Penstock Gates |
1912 |
VIII-9/2 | Sluice Gate for Dam |
1906 |
VIII-9/2 | Floor Plan Showing Reinforcements |
1907 |
VIII-9/2 | Flashboard Detail |
1911 |
VIII-9/2 | Flashboard Detail |
1911 |
VIII-9/2 | Penstock Gates for Exciter Turbines |
1907 |
VIII-9/2 | Steel Plate for Corners of Fore-bay Floor |
1907 |
VIII-9/2 | Emergency Flume Spillway |
1909 |
VIII-9/2 | Proposed Construction of South Abutment |
1909 |
VIII-9/2 | Exciter at Bonner Power House |
Undated |
VIII-9/2 | Flashboard Detail |
1917 |
VIII-9/2 | 2 Inch Pine Segments for Concrete Forms Against Turbine |
1907 |
VIII-9/2 | Segments for Concrete Arches |
1906 |
VIII-9/2 | 2 Inch Pine Segments for Concrete Forms Against Turbine |
Undated |
VIII-9/2 | Thimble in Concrete Wall |
1907 |
VIII-9/2 | Upstream Wall of Power House |
Undated |
VIII-9/2 | Control Switches and Solenoid on 11000 Volt Line |
1913 |
VIII-9/2 | 24 inch Crib Showing Steps |
Undated |
VIII-9/2 | Floor Beams and Reinforcement Bars |
1907 |
VIII-9/2 | Downstream Toe of Dam |
1908 |
VIII-9/3 | Sounding at Toe of Dam |
1976 |
VIII-9/3 | Section of Power House |
Undated |
VIII-9/3 | Proposed Modifications of Dam and Power Plant |
1907 |
VIII-9/4 | Clipping from a Drawing of Unit #7 |
Undated |
VIII-9/4 | Conduit Wiring |
1907 |
VIII-9/4 | Plan for Power House |
1908 |
VIII-9/4 | Drawing No. 8 |
1906 |
VIII-9/4 | Elbow Attached to Thimble to be Used for Draining Pond |
1907 |
VIII-9/4 | Section Through Spillway at Break Showing Proposed Method of Reconstruction |
1908 |
VIII-9/4 | Wiring Diagram of Generating Station |
Undated |
VIII-9/4 | Comparison of Bids for Equipment of Power House |
1906 |
VIII-9/4 | Elevations Along Breakwater |
1914 |
VIII-9/4 | Stability Diagram to Accompany Plan No. 2 for Reconstruction Work |
1907 |
VIII-9/4 | Stability Diagram of Concrete Wall Forming Upstream Side of Power House |
1907 |
VIII-9/4 | Forms and Tremie |
1930 |
VIII-9/4 | East End Power House |
1907 |
VIII-9/4 | Down Stream Elevation of Power House |
1908 |
VIII-9/4 | General Plan of Power House Walls |
1907 |
VIII-9/4 | Clark's Dam |
1906 |
VIII-9/4 | Penstock Gates for Power House |
1907 |
VIII-9/4 | Stability Diagram to Accompany Plan No. 2 for Reconstruction Work |
1907 |
VIII-9/4 | Sketch of New Breakwater Wall and Toe Reinforcement |
1930 |
VIII-9/4 | Penstock Gate |
1958 |
VIII-9/4 | Gate Slides and Seals for Penstock Tubes |
1906 |
VIII-9/4 | Drawing No. 42 |
Undated |
VIII-9/5 | Downstream Elevation of Power House |
1908 |
VIII-9/5 | Proposed Reconstruction |
1908 |
VIII-9/5 | Plan and Elevation Views |
1965 |
VIII-9/5 | Soundings |
1930 |
VIII-9/5 | Soundings |
1929 |
VIII-9/5 | Sluice pipes for Draining Dam |
1907 |
VIII-9/5 | Clark's Dam |
1906 |
VIII-9/5 | Reconstruction of Downstream Toe of Dam |
1909 |
VIII-9/5 | Abutment Wall Elevation and Cross Sections |
1965 |
VIII-9/5 | Steel Details for Penstock Gate |
1958 |
VIII-9/5 | Flashboard Detail |
1911 |
VIII-9/5 | Penstock Gate for Exciter Turbines |
1959 |
VIII-9/5 | End View Water Wheels of Exciter Unit |
1909 |
VIII-9/5 | Penstock Gate for Exciter Turbines |
1907 |
VIII-9/5 | Sketch Showing Improvements to be Made |
1908 |
VIII-9/5 | Proposed Concrete and Steel Plate Fillet for Fore-bay |
1907 |
VIII-9/5 | Wing Cribs Upstream Side of Dam and on Sides of Fore-bay |
1907 |
VIII-9/5 | General Scheme of Reconstruction |
1909 |
VIII-9/5 | Abutment Wall-Clark's Dam as Constructed |
1930 |
VIII-9/5 | Construction at Toe Dam |
1931 |
VIII-9/5 | Cut-off Wall Clark's Dam North Side Fore-bay |
1931 |
VIII-9/5 | Cross Sections Abutment Wall |
1931 |
VIII-9/6 | Tail Race Walls and Reconstruction South End |
1931 |
VIII-9/6 | Sketch Showing Rock Pile to be Removed from Clark's Dam |
Undated |
VIII-9/6 | Sounding Clark's Dam Elevations and Toe |
1930 |
VIII-9/6 | Section through Gap at South End of Dam |
1909 |
VIII-9/6 | Section Through Roof Showing Lumber and Ruberoid Required |
1907 |
VIII-9/6 | Details of Brick Work |
1907 |
VIII-9/6 | Sections of Milltown (Clark) Dam |
1938 |
VIII-9/6 | Summation Quantities |
1930 |
VIII-9/6 | Details of Grid Bars and Scheme of Holding Them Together |
1906 |
VIII-9/6 | Concrete Wall from Upstream Side of Power House |
1906 |
VIII-9/6 | Downstream Elevation of Power House Walls |
1906 |
VIII-9/6 | Section Through Power House |
1908 |
VIII-9/6 | Supplement to Conduit Drawing No.1 |
1907 |
VIII-9/6 | Conduits in Power House |
1912 |
VIII-9/6 | Grid Bar Supports |
1906 |
VIII-9/6 | West End Elevation of Power House |
1906 |
VIII-9/6 | Crest of Spillway |
Undated |
VIII-9/6 | Field Modification to 230-D-45 Tower |
1976 |
VIII-9/6 | Detail of Stem Guide and Bracket |
Undated |
VIII-9/6 | Unlabeled Drawing |
Undated |
VIII-9/6 | Exit Stem for 9x14 Sluice Gate |
Undated |
VIII-9/6 | Stability Diagram of Proposed Concreate Wall for Upstream Side of Power House |
1907 |
VIII-9/7 | Arrangement of Entrance Panels |
1907 |
VIII-9/7 | Busbar Compartment at H.T. Wiring |
1907 |
VIII-9/7 | Wooden Segments for Circular Openings Through Concrete Wall Segments |
1906 |
VIII-9/7 | Stability Diagram of Concrete Wall Upstream Side of Break in Dam |
1908 |
VIII-9/7 | Elevation of Points on Top of Breakwater to Determine Settlement and Soundings in Cribs |
1909 |
VIII-9/7 | Steel Details Penstock Gate for Exciter Turbines |
1959 |
VIII-9/7 | Gate Hoist Frame |
1957 |
VIII-9/7 | Operating Mechanism Gate 7 and 8 |
1912 |
VIII-9/7 | Penstock Gates |
1907 |
VIII-9/7 | Wiring Diagram of Generating Station |
1907 |
VIII-9/7 | Downsteram Elevation of Power House |
1908 |
VIII-9/7 | Design of Cribwork Toe of Dam |
1909 |
VIII-9/7 | Gate Hoist Instalation |
1957 |
VIII-9/7 | Gate with Steel Frame Attached for Lifting with Hydraulic Jack |
1906 |
VIII-9/7 | Detail of Form for Toe Reinforcing |
1925 |
VIII-9/7 | Roof Plan of Power House |
1911 |
VIII-9/7 | Pockets to be Cut in Concrete Wall for Steel Brace |
1907 |
VIII-9/7 | Arrangement of Transformers and Wiring |
1907 |
VIII-9/7 | Flashboard Detail |
1911 |
VIII-9/7 | Flashboard Detail |
1917 |
VIII-9/7 | Transformers and Busbar Compartments and Wiring |
1907 |
VIII-9/7 | Diagram of Switchboard Wiring in Power House |
1907 |
VIII-9/7 | Windows for Monitor of Power house |
1907 |
VIII-9/8 | Project Boundry |
1989 |
VIII-9/8 | General Plan of Dam and Plant |
Undated |
VIII-9/8 | Toe Sounding |
1975 |
VIII-9/8 | Rehabilitation Power House |
Undated |
VIII-9/8 | Milltown Plant Power Wiring Diagrams |
1953 |
VIII-9/9 | Spillway Repair 4 drawings
|
1983 |
VIII-10/10 | Dif Metering 4 drawings
|
1975 |
VIII-10/11 | One Line Diagram 3 drawings
|
1998 |
VIII-10/12 | Spillway Repair 16 drawings
|
1983 |
VIII-10/13 | Spillway Light, Project Area, Dividing Block Fore-bay 35 drawings
|
Undated |
VIII-10/14 | Sluceway Structure Intake Gates and Trash Rack 11 drawings
|
Undated |
VIII-10/15 | Exhibit L License Application 6 Drawings
|
Undated |
VIII-10/16 | Rehabilitation Prints 8 drawings
|
Undated |
VIII-10/17 | Milltown Project 9 drawings
|
Undated |
VIII-10/18 | Rehabilitation 56 drawings
|
1985 |
Series II: Reports and Logbooks, 1929-2005Return to Top
This series contains reports, records, and logs of the Milltown Dam's operations created and stored by the owners and operators of the Milltown Dam, and it is divided into six sub-series. These materials contain information on the dams energy output, weather conditions, water levels and flows, and general operation notes.
Container(s) | Description | Dates |
---|---|---|
Sub-series 1: Daily Reports and Logs 8.0 linear feet
This sub-series contains records of A.C. amps, D.C. amps, and Kilowatt output for the dam’s five generators and two exciters as well as records of water flow, reservoir elevation, and weather recorded daily.
Contents are arranged chronologically.
|
1951-2002 | |
Box | ||
OS 1 | Daily Report |
July 21- August 16, 1951 |
OS 1 | Daily Report |
April 20-June 19, 1952 |
OS 1 | Daily Report |
March 23-June 30, 1953 |
OS 1 | Daily Report |
July 1-September 29, 1953 |
OS 1 | Daily Report |
September 30-December 31, 1953 |
OS 1 | Daily Report |
January-April, 1954 |
OS 1 | Daily Report |
May-December, 1954 |
2 | Daily Report |
January, 1983 |
2 | Daily Report |
February, 1983 |
2 | Daily Report |
March, 1983 |
2 | Daily Report |
April, 1983 |
2 | Daily Report |
May, 1983 |
2 | Daily Report |
June, 1983 |
2 | Daily Report |
July, 1983 |
2 | Daily Report |
August, 1983 |
2 | Daily Report |
September, 1983 |
2 | Daily Report |
October, 1983 |
2 | Daily Report |
November, 1983 |
2 | Daily Report |
December, 1983 |
3 | Daily Report |
January, 1986 |
3 | Daily Report |
February, 1986 |
3 | Daily Report |
March, 1986 |
3 | Daily Report |
April, 1986 |
3 | Daily Report |
May, 1986 |
3 | Daily Report |
June, 1986 |
3 | Daily Report |
July, 1986 |
3 | Daily Report |
August, 1986 |
3 | Daily Report |
September, 1986 |
3 | Daily Report |
October, 1986 |
3 | Daily Report |
November, 1986 |
3 | Daily Report |
December, 1986 |
3 | Daily Report |
Undated |
4 | Daily Report |
May-August, 1987 |
4 | Daily Report |
September-December, 1987 |
4 | Daily Report |
January-April, 1988 |
4 | Daily Report |
May-August, 1988 |
5 | Daily Report |
September-December, 1988 |
5 | Daily Report |
January-April, 1989 |
5 | Daily Report |
May-August, 1989 |
5 | Daily Report |
September-December, 1989 |
6 | Daily Report |
January-April, 1990 |
6 | Daily Report |
May-August, 1990 |
6 | Daily Report |
September-December, 1990 |
6 | Daily Report |
January-April, 1991 |
7 | Daily Report |
May-August, 1991 |
7 | Daily Report |
September-December, 1991 |
7 | Daily Report |
January-April, 1992 |
7 | Daily Report |
May-August, 1992 |
8 | Daily Report |
September-December, 1992 |
8 | Daily Report |
January-April 1993 |
8 | Daily Report |
May-August, 1993 |
8 | Daily Report |
September-December, 1993 |
9 | Daily Report |
January-April, 1994 |
9 | Daily Report |
May-August, 1994 |
9 | Daily Report |
September-December, 1994 |
9 | Daily Report |
January-April, 1995 |
10 | Daily Report |
May-August, 1995 |
10 | Daily Report |
September-December, 1995 |
10 | Daily Report |
January-April, 1996 |
10 | Daily Report |
May-August, 1996 |
11 | Daily Report |
September-December, 1996 |
11 | Daily Report |
January-April, 1997 |
11 | Daily Report |
May-August, 1997 |
11 | Daily Report |
September-December, 1997 |
12 | Daily Report |
January-March, 1998 |
12 | Daily Report |
April-June, 1998 |
12 | Daily Report |
July-September, 1998 |
12 | Daily Report |
October-December, 1998 |
13 | Daily Report |
January-March, 1999 |
13 | Daily Report |
April-June, 1999 |
13 | Daily Report |
July-September, 1999 |
13 | Daily Report |
October-December, 1999 |
13 | Daily Report |
January-March, 2000 |
14 | Daily Report |
April-June, 2000 |
14 | Daily Report |
July-September, 2000 |
14 | Daily Report |
October-December, 2000 |
14 | Daily Report |
January-March, 2001 |
14 | Daily Report |
April-June, 2001 |
15 | Daily Report |
July-September, 2001 |
15 | Daily Report |
October-December, 2001 |
15 | Daily Report |
January-March, 2002 |
15 | Daily Report |
April-June, 2002 |
15 | Daily Report |
July-September, 2002 |
16 | Daily Report |
October-December, 2002 |
16 | Daily Report |
January-April, 2003 |
16 | Daily Report |
May-August, 2003 |
16 | Daily Report |
September-December, 2003 |
17 | Daily Report |
January-April, 2004 |
17 | Daily Report |
May-August, 2004 |
17 | Daily Report |
September-December, 2004 |
17 | Daily Report |
January-April, 2005 |
17 | Daily Report |
May-August, 2005 |
17 | Daily Report |
September-December, 2005 |
17 | Daily Report |
January-April, 2006 |
18 | Daily Report |
May-August, 2006 |
18 | Daily Report |
September-December, 2006 |
18 | Daily Report |
January-April, 2007 |
18 | Daily Report |
May-August, 2007 |
18 | Daily Report |
September-December, 2007 |
18 | Daily Report |
January-February, 2008 |
19 | Milltown Plant Daily Log Book |
July 27, 1995-October 1, 1999 |
19 | Milltown Plant Daily Log Book |
October 2, 1999-November 10, 2000 |
19 | Milltown Plant Daily Log Book |
November 11, 2000-May 14, 2002 |
Sub-series 2: Monthly Reports and Logs 1.0 linear feet
This sub-series contains records of temperature, water data, meter readings, and generation data.
Contents are arranged chronologically.
|
1945-2005 | |
Box | ||
OS 20 | Weather, Water, and Electrical Record Book |
November 1929-May 1945 |
OS 20 | Weather, Water, and Electrical Record Book |
June 1945-June 1997 |
OS 21 | Monthly Log |
1955-1959 |
OS 21 | Monthly Log |
1960-1963 |
OS 21 | Monthly Log |
1964-1967 |
OS 21 | Monthly Log |
1968-1971 |
OS 21 | Monthly Log |
1972-1975 |
OS 21 | Monthly Log |
1976-1979 |
22 | Monthly Log |
1980 |
22 | Monthly Log |
1981 |
22 | Monthly Log |
1982 |
22 | Monthly Log |
1983 |
22 | Monthly Log |
1984 |
22 | Monthly Log |
1985 |
22 | Monthly Log |
1986 |
22 | Monthly Log |
1987 |
22 | Monthly Log |
1988 |
22 | Monthly Log |
1989 |
22 | Monthly Log |
1990 |
22 | Monthly Log |
1991 |
22 | Monthly Log |
1992 |
22 | Monthly Log |
1993 |
22 | Monthly Log |
1994 |
22 | Monthly Log |
1995 |
22 | Monthly Log |
1996 |
22 | Monthly Log |
1997 |
22 | Monthly Log |
1998 |
22 | Monthly Log |
1999 |
22 | Monthly Log |
2000 |
22 | Monthly Log |
2001 |
23 | Monthly Log |
2002 |
23 | Monthly Summary of Daily Readings |
2003 |
23 | Monthly Summary of Daily Readings |
2004 |
23 | Monthly Summary of Daily Readings |
2005 |
Sub-series 3: Hourly Logs 0.25 linear feet
This sub-series consists of eight handwritten logbooks of data collected hourly. The contents are not clearly labeled.
Contents are arranged chronologically.
|
1978-1986 | |
Box | ||
23 | Hourly Log Book |
1978-1979 |
23 | Hourly Log Book |
1980-1981 |
23 | Hourly Log Book |
1981-1982 |
23 | Hourly Log Book |
1983 |
23 | Hourly Log Book |
1984 |
23 | Hourly Log Book |
1985 |
23 | Hourly Log Book |
1986 |
23 | Hourly Log Book |
undated |
Sub-series 4: Monthly Generation Reports 0.25 linear feet
This sub-series contains monthly reports of water data, operation data, and total energy generated by the Milltown Dam. It also provides information about plant shutdowns and the daily average load measured in Kilowatts.
Contents are arranged chronologically.
|
1972-2002 | |
Box | ||
23 | Monthly Generation Reports |
1972-1979 |
23 | Monthly Generation Reports |
1980-1989 |
23 | Monthly Generation Reports |
1990-1999 |
24 | Monthly Generation Reports |
2000-2005 |
24 | Miscellaneous Monthly Generation Reports |
1992-2002 |
Sub-series 5: Generator Outage Reports 0.25 linear feet
This sub-series contains log sheets showing the time, date, and cause of generator shutdowns.
Contents are arranged chronologically.
|
1977-2005 | |
Box | ||
24 | Generator Outage Report |
1970s |
24 | Generator Outage Report |
1980s |
24 | Generator Outage Report |
1990s |
24 | Generator Outage Report |
2000s |
24 | Generator Outage Report |
undated |
Sub-series 6: Monthly Storage Battery Reports 0.1 linear feet
This sub-series contains data sheets showing storage battery volts and amps collected monthly.
Contents are arranged chronologically.
|
1987-2002 | |
Box | ||
24 | Monthly Storage Battery Report |
1987-1989 |
24 | Monthly Storage Battery Report |
1990-1999 |
24 | Monthly Storage Battery Report |
2000-2002 |
Series III: Parts Information and Maintenance Records, 1929-1998Return to Top
This series contains drawings, prints, receipts, reports and logs related to maintenance, upkeep, and construction on the Milltown Dam. The owners and operators of the Milltown Dam generated and stored these records.
Container(s) | Description | Dates |
---|---|---|
Box/Folder | ||
24 / 11 | Alignment Survey Data Report |
1994 |
25 / 1 | Annunciator Prints |
1968 |
25 / 2 | Ballast Wiring Shop |
Undated |
25 / 3 | Battery Information |
1987-1988 and Undated |
25 / 4 | Bearings |
1971, 1977, 1981 and Undated |
25 / 5 | Bearing #1 |
1966-1967 and 1970-1971 |
25 / 6 | Bearing #2 |
1972-1973 |
25 / 7 | Bearings #2-5 |
1971-1972 |
25 / 8 | Boat Restraints |
1995 and undated |
25 / 9 | Brushes |
1962, 1965, 1995 and 2000 |
25 / 10 | Camp Well |
Undated |
25 / 11 | Commutator and Slip Ring Information |
Undated |
25 / 12 | Commutator and Slip Ring Maintenance Handbook |
1949 |
25 / 13 | Dam Reconstruction Information |
1984-1985 |
25 / 14 | Differential Relays |
1953 and Undated |
25 / 15 | Diving Inspection |
1983 |
25 / 16 | Drains Information |
1983 and Undated |
25 / 17 | Exciter Bearings |
1963, 1982, 1991 and Undated |
25 / 18 | Exciter Bearing Transparency |
Undated |
26 / 1 | Exciter Information |
1906, 1941 and 1957 |
26 / 2 | Exciter #1 Reconditioning |
1974 |
26 / 3 | Exhaust Fan Information |
1988 and 1990 |
26 / 4 | Federal Energy Regulatory Commission Inspections |
1980, 1993 and 2003 |
26 / 5 | Federal Energy Regulatory Commission Licensing |
1968-2000 |
26 / 6 | Federal Energy Regulatory Commission Monitoring Data |
1984 |
26 / 7 | Federal Energy Regulatory Commission Security Checklist |
2002 |
26 / 8 | Field Switch Information |
Undated |
26 / 9 | Fisheries Mitigation Annual Report |
2000 |
26 / 10 | Fixed Wheel Prints |
1986 |
26 / 11 | Generation Power Factor |
1969 and undated |
26 / 12 | Generator Controls and Relays |
Undated |
26 / 13 | Generator Schematic, Alarm Panel, and Exciter Panel Layout and Wiring Diagrams |
1953 and 1975 |
26 / 14 | Governor Information (1 of 2) |
1951, 1955, 1957, 1960 and 1962 |
26 / 15 | Governor Information (2 of 2) |
1951, 1955, 1957, 1960 and 1962 |
26 / 16 | Governor Wiring #4 |
Undated |
26 / 17 | Gravity Wall Seepage Report |
1997 |
26 / 18 | High Water Information |
1972 |
26 / 19 | High Water Information |
1974 |
26 / 20 | High Water Information |
1981 |
27 / 1 | High Water News Reports |
1975 |
27 / 2 | High Water Stream Flow Data |
1997 |
27 / 3 | Insurance Map of Milltown |
Undated |
27 / 4 | Leads and Field Reconductoring |
Undated |
27 / 5 | Lights Overhead |
Undated |
27 / 6 | Maintenance Annual Reports |
1993-2002 |
27 / 7 | Maintenance Major Rehabilitation |
1980 |
27 / 8 | Maintenance Schedules |
1979-1980 and 1982 |
27 / 9 | Miscellaneous Notes |
1971 |
27 / 10 | Monitoring Log and photographs |
2000 |
27 / 11 | Panel Hoist Inspection |
1994 |
27 / 12 | Panel Hoist Prints |
Undated |
27 / 13 | Panel Layout Prints |
1975 |
27 / 14 | Penstock Gate Prints |
1957 and 1959 |
27 / 15 | Penstock Monitoring Program and Logs |
1997-2006 |
27 / 16 | Plant Wiring Diagrams |
1953 and 1975 |
27 / 17 | Plugging Switches |
Undated |
27 / 18 | Pond Elevation Alarm |
Undated |
27 / 19 | Pond Level Transducer |
Undated |
28 / 1 | Project Maps |
Undated |
28 / 2 | Project 2188 Exhibits F and G |
1992 |
28 / 3 | Pump Information |
Undated |
28 / 4 | Radial Gate |
1989, 1998, 2003-2004 and Undated |
28 / 5 | Recloser |
1975 and Undated |
28 / 6 | Recreation Reports and Information |
1975 and 1987-1989 |
28 / 7 | Regulator Instructions and Prints |
Undated |
28 / 8 | Rehabilitation Phase II Request for Proposals |
1988 |
28 / 9 | Rehabilitation Proposal Drawings |
1985 |
28 / 10 | Relay Monitoring |
Undated |
29 / 1 | Reservoir Drawdowns |
1980 |
29 / 2 | Reservoir Drawdowns |
1981 |
29 / 3 | Reservoir Drawdowns |
1984 |
29 / 4 | Reservoir Drawdowns |
1985 |
29 / 5 | Reservoir Drawdowns |
1989 |
29 / 6 | Reservoir Drawdowns |
2001 |
29 / 7 | Reservoir Drawdowns |
2002 |
29 / 8 | Reservoir Drawdowns |
2003 |
29 / 9 | Reservoir Drawdowns |
2004 |
29 / 10 | Reservoir Drawdowns |
2005 |
29 / 11 | Reservoir Drawdown Requirements |
Undated |
29 / 12 | Screen Rake Hoist Inspection and Information |
1994-1998 |
29 / 13 | Sign Inventory |
1995-2006 |
29 / 14 | Silt Accumulation Chart |
1979 |
29 / 15 | Solid State Voltage Regulator |
1980 |
29 / 16 | Sounding and Leakage Tests |
1977 and 1983 |
29 / 17 | Spillway and Dividing Blocks Evaluation Graphs |
1973-1982 |
29 / 18 | Spillway Bridge Prints |
1996 |
29 / 19 | Spillway Emergency Repairs |
1986 |
29 / 20 | Spillway Gate Operation Certificate |
1996, 2000-2007 |
30 / 1 | Spillway Leveling Prints |
1980 |
30 / 2 | Spillway Rehabilitation General Construction Request for Proposals |
1986 |
30 / 3 | Tailrace Efficiency Curve |
Undated |
30 / 4 | Thermal Gun Readings |
1998 |
30 / 5 | Toe Sounding |
1981 |
30 / 6 | Toe Sounding Charts and Memorandum |
1975 and 1977 |
30 / 7 | Training Wall Prints |
1973 |
30 / 8 | Transformers |
Undated |
30 / 9 | Trash Boom |
1971-1972 |
30 / 10 | Turbine Alignment |
1980-1981 |
30 / 11 | Turbine Bearings |
1970 |
30 / 12 | Turbine Gate Control Schematic |
1969 |
30 / 13 | Turbines, Miscellaneous |
Undated |
30 / 14 | Turbine Water Wheel Specifications and Proposal |
1927 |
30 / 15 | Turbines # 3 and 4 |
1954 |
30 / 16 | Turbine # 5 |
1972 |
30 / 17 | Water Safety Boom |
1970 and 1972 |
30 / 18 | Water Supply Outlook for Montana |
1975 |
30 / 19 | Water Wheels, Turbines, and Generator Cost Sheet |
1937 |
30 / 20 | Water Utilization Factor |
1996-2002 |
30 / 21 | 12.5kv Feeder Circuit Map for Missoula, Montana |
Undated |
Series IV: Dam Safety Records, 1972-2006Return to Top
This series contains reports and emergency procedure documents from the Milltown Dam related to Federal Energy Regulatory Commission (FERC) standards. This includes documents from both the Montana Power Company and Northwestern Energy. In this series, the Milltown Dam is also referred to as the Milltown Hydroelectric Project and the FERC Project #2543.
Container(s) | Description | Dates |
---|---|---|
Box/Folder | ||
31 / 1 | Dam Safety Investigations |
1972 |
31 / 2 | Water Resource and Hazard Planning Report for the Clark Fork River Valley above Missoula |
1974 |
31 / 3 | Milltown Hydroelectric Project Engineering Evaluation |
1984 |
31 / 4 | Inspection of Project Works |
1991 |
32 / 1 | Draft Safety Analysis Report |
1995 |
32 / 2 | Community Action Plan for the Bonner Area Communities |
1996 |
32 / 3 | Inspection of Project Works |
1996 |
32 / 4 | Overtopping Evaluation |
2000 |
32 / 5 | Ice Jam Evaluation |
2000 |
32 / 6 | Alignment Survey Data Report |
2000 |
33 / 1 | Alignment Survey Data Report |
2001 |
33 / 2 | Spillway Leakage Evaluation |
2001 |
33 / 3 | Missoula County Public Opinion survey Regarding the Milltown Superfund Site |
2001 |
33 / 4 | Inspection of Project Works (1 of 3) |
2001 |
33 / 5 | Inspection of Project Works (2 of 3) |
2001 |
33 / 6 | Inspection of Project Works (3 of 3) |
2001 |
33 / 7 | Inspection of Project Works Appendix D (1 of 4) |
2001 |
33 / 8 | Inspection of Project Works Appendix D (2 of 4) |
2001 |
34 / 1 | Inspection of Project Works Appendix D (3 of 4) |
2001 |
34 / 2 | Inspection of Project Works Appendix D (4 of 4) |
2001 |
34 / 3 | Inspection of Project Works Appendix E (1 of 2) |
2001 |
34 / 4 | Inspection of Project Works Appendix E (2 of 2) |
2001 |
34 / 5 | Drilling Contract bid documents and geophysical testing proposal |
2002 |
34 / 6 | Inspection of Right Bank Seepage Conditions |
2002 |
34 / 7 | Emergency Action Plan |
2003 |
34 / 8 | Alignment Survey Data Report |
2003 |
34 / 9 | Dam Foundation Exploration Addendum 1 to 2001 Inspection Project Works |
2003 |
35 / 1 | Addendum 2 to 2001 Inspection of Project Works |
2004 |
35 / 2 | Alignment Survey Data Report |
2004 |
35 / 3 | Alignment Survey Data Report |
2005 |
35 / 4 | Alignment Survey Data Report |
2006 |
35 / 5 | Energency Action Plan Updated Replacement |
2006 |
35 / 6 | Emergency Action Plan |
Undated |
Series V: Environmental Protection Agency Superfund Cleanup Materials, 1970-2005Return to Top
This series contains research materials and reports related to the Milltown Dam's NPL status and the Superfund cleanup process. The documents were collected by Peter Nielson, Environmental Health Supervisor for Missoula County, Montana, from 1992 to 2018.
Container(s) | Description | Dates |
---|---|---|
Box/Folder | ||
36 / 1 | Cultural Resource Report |
1990 |
36 / 2 | Sediments Investigations Sampling and Analysis Plan |
1989 |
36 / 3 | Continued Releases Risk Assessment |
1994 |
36 / 4 | Exposure Survey Plan |
1990 |
36 / 5 | Application for Amendment of License Milltown Supplemental Data Supporting Design Report |
1985 |
36 / 6 | Inflatable Rubber Dam Retrofit Preliminary Engineering Report |
2001 |
36 / 7 | Milltown Dam Conceptual Channel Design Report |
2001 |
36 / 8 | Revised Final Draft Focused Feasibility Study |
2001 |
37 / 1 | Two Rivers Maps |
Undated |
37 / 2 | Milltown Feasibility Study (1 of 3) |
2001 |
37 / 3 | Milltown Feasibility Study (2 of 3) |
2001 |
37 / 4 | Milltown Feasibility Study (3 of 3) |
2001 |
37 / 5 | Milltown Focused Feasibility Study (1 of 3) |
2001 |
37 / 6 | Milltown Focused Feasibility Study (2 of 3) |
2001 |
37 / 7 | Milltown Focused Feasibility Study (3 of 3) |
2001 |
37 / 8 | Milltown Focused Feasibility Study Comments (1 of 3) |
1999-2001 |
38 / 1 | Milltown Focused Feasibility Study Comments (2 of 3) |
1999-2001 |
38 / 2 | Milltown Focused Feasibility Study Comments (3 of 3) |
1999-2001 |
38 / 3 | Milltown Combined Feasibility Comments (1 of 2) |
2001-2002 |
38 / 4 | Milltown Combined Feasibility Comments (2 of 2) |
2001-2002 |
38 / 5 | Milltown Dam Federal Energy Regulatory Commission License Surrender |
2005 |
38 / 6 | Milltown Memorandum of Understanding |
Undated |
38 / 7 | Public Service Commission (1 of 2) |
1998-2002 |
39 / 1 | Public Service Commission (2 of 2) |
1998-2002 |
39 / 2 | Milltown Superfund General Background |
1982-1995 |
39 / 3 | Risk Assessment Correspondence (1 of 2) |
1970-2001 |
39 / 4 | Risk Assessment Correspondence (2 of 2) |
1970-2001 |
39 / 5 | Milltown Federal Energy Regulatory Commission Relicensing (1 of 4) |
1987 and 2000-2005 |
39 / 6 | Milltown Federal Energy Regulatory Commission Relicensing (2 of 4) |
1987 and 2000-2005 |
40 / 1 | Milltown Federal Energy Regulatory Commission Relicensing (3 of 4) |
1987 and 2000-2005 |
40 / 2 | Milltown Federal Energy Regulatory Commission Relicensing (4 of 4) |
1987 and 2000-2005 |
40 / 3 | Environmental Protection Agency, Remedial Action Master Plan Draft |
1983 |
40 / 4 | Assessment of Damages to Anglers and other Recreators from Injuries to the Upper Clark Fork River Basin |
1993 |
40 / 5 | Draft Final Screening of Alternatives Summary Report |
1995 |
40 / 6 | Draft Addendum to the Draft Final Screening of Alternatives Summary Report |
1995 |
40 / 7 | Addendum to the Draft Final Screening of Alternatives Summary Report |
1995 |
41 / 1 | Revised Community Relations Plan |
1992 |
41 / 2 | Public Health Evaluation Work Plan, Base Line Risk Assessment |
1992 |
41 / 3 | Proposed Plan for Interim Institutional Controls |
1992 |
41 / 4 | Milltown Air Quality Monitoring Program Draft Report, Volume I |
1992 |
41 / 5 | Milltown Air Quality Monitoring Program Draft Report, Volume II |
1992 |
41 / 6 | Milltown Air Quality Monitoring Program Draft Report, Volume III |
1992 |
41 / 7 | Institutional Controls Workshop |
1992 |
41 / 8 | Public Health Evaluation Exposure Survey Results Draft |
1991 |
41 / 9 | Endangerment Assessment Work Plan |
1990 |
41 / 10 | Data Management Plan |
1990 |
42 / 1 | Sediments Investigations Sampling and Analysis Plan |
1990 |
42 / 2 | Health and Safety Plan and Site Management Plan |
1990 |
42 / 3 | Quality Assurance Project Plan |
1990 |
42 / 4 | Discussion Points Wetland Work Plan |
1990 |
42 / 5 | Draft Work Plan Continued Releases Risk Assessment |
1990 |
42 / 6 | Sampling Program at Milltown and Bonner Junction Program Overview and QA/QC |
1990 |
43 / 1 | Work Plan Scoping Document |
1989 |
43 / 2 | Technical Comments on CERCLA Documents and Remedial Investigations and Feasibility Studies |
1989 |
43 / 3 | Revised Work Plan For Negotiation Support and Oversight |
1989 |
43 / 4 | Feasibility Study Work Plan Final Draft |
1989 |
43 / 5 | Outline of the Endangerment Assessment Work Plan Draft |
1989 |
43 / 6 | Quality Assurance Project Plan |
1989 |
43 / 7 | Human Health Evaluation Work Plan Draft |
1989 |
43 / 8 | Remedial Investigation Completion and Feasibility Study Work Plan |
1989 |
44 / 1 | Cover Letter for Data Summary Report For Milltown Interim Groundwater Monitoring |
1998 |
44 / 2 | Clark Fork River Ecological Risk Assessment |
1999 |
44 / 3 | Sampling and Analysis Plan |
1988 |
44 / 4 | Ecological Risk Assessment Clark Fork River Operable Unit, Volume II |
1999 |
44 / 5 | Save Our Bridge Campaign |
2006 |
Series VI: Photographs, 1907-2007Return to Top
This series is a collection of photographs taken by Milltown Dam affiliates, photographer Kristi Hager, and other unknown photographers. It contains photographs from accessions 2010-007, 2007-019, 2007-020, and 2008-015 and is divided into three sub-series.
Container(s) | Description | Dates |
---|---|---|
Sub-series 1: Milltown Dam Photographs 0.75 linear feet
This sub-series contains images collected by the owners and operators of the Milltown Dam from 1907-2003. It includes images of the dam’s construction, maintenance, function, and recreation activities.
Contents are arranged alphabetically by folder title.
|
1907-2003 | |
Box | ||
VIII-10 | Aerial Photographs |
Undated |
Box/Folder | ||
45 / 1 | Dam Construction |
Circa 1907 |
46 / 1 | Cement Cutting |
1980 |
46 / 2 | Crest of Dam After 17 Board Break |
1973 |
46 / 3 | Dam |
1997 |
46 / 4 | Dam |
1998 |
46 / 5 | Dam Break Pictures |
1972 |
46 / 6 | Dam Exterior and Recreation |
2003 |
46 / 7 | Dam Inspection |
Undated |
46 / 8 | Dam Flashboard Failure due to Ice and Debris |
1986 |
46 / 9 | Dam Interior, Exterior, Reservoir and Maintenance |
Undated |
46 / 10 | Drawdown |
2002 |
46 / 11 | Exciter #1 Overhaul |
2001 |
46 / 12 | Exciter #2 |
1996 |
46 / 13 | Exciter #2 Broken Yoke |
1980 |
46 / 14 | Exciter #2 Clutch Assembly |
1982 |
46 / 15 | High Water |
Undated |
46 / 16 | High Water |
1997 |
46 / 17 | High Water and Debris |
1975 |
46 / 18 | Ice |
Undated |
46 / 19 | Ice Breakup |
1989 |
46 / 20 | Ice Breakup |
1996 |
46 / 21 | Plant and Unit #4 |
1971 |
46 / 22 | Plant Pictures After Interior Paining |
1974 |
46 / 23 | Sewer |
1968 |
46 / 24 | Sluice Gate, Exciter Gate, and Unlabeled Photographs |
1968 and 1970 |
47 / 1 | Spillway Repair |
1981 |
47 / 2 | Turning Down #2 Shaft After Buildup |
1972 |
47 / 3 | Unit #1 Generator Rewind |
1958 |
47 / 4 | Unit #2 |
1997 |
47 / 5 | Unit #2 Downstream Turbine |
Undated |
47 / 6 | Unit #2 Shaft Buildup at Packing Area |
1980 |
47 / 7 | Unit #2 Upstream Bearing |
1972 |
47 / 8 | Unit #3 Overhaul |
1970 |
47 / 9 | Unit #3 Overhaul |
2002 |
47 / 10 | Unit #4 Maintenance |
1998 |
47 / 11 | Unit #5 Shaft Turning and Bearing with Cap |
1972 |
47 / 12 | Unit #5 Turning Shaft Packing Area for Buildup |
1981 |
47 / 13 | Various Pictures including #1 Overhaul |
1969 |
47 / 14 | Loose Photos |
Undated |
Sub-series 2: Kristi Hager Photographs 1 folder (18 photographs and 18 negatives)
This sub-series is a collection of photographs taken by photographer Kristi Hager. It contains six color and twelve black and white photographs of the dam, powerhouse and spillway as well as the photonegatives.
|
circa 2005 | |
Box/Folder | ||
47 / 15 | Dam, Power House, and Spillway |
2006 |
Sub-series 3: Dam and Powerhouse Shutdown 2 CD's
This sub-series contains images from the powerhouse and dam shutdown.
Contents are arranged alphabetically by folder title.
|
2006 | |
electronic_file | ||
digital images | Milltown Project Final Plant Shutdown |
2006 |
digital images | Milltown Dam Shutdown |
2006 |
Series VII: Audiovisual Materials, 1997-2006Return to Top
This series contains audiovisual records concerning the Milltown Dam's history, ice jams, and removal. It includes audio and video recordings created by Missoula Community Access Television, Peter Nielson, Northwestern Energy, and the Montana Power Company. Both digital and physical copies of these materials are available. Series VII contains materials from accessions 2007-020 and 2012-030.
Container(s) | Description | Dates |
---|---|---|
drawer | ||
DVD cabinet | Milltown Ice Jam Moving image on DVD
|
1996 |
DVD cabinet | Milltown Dam Ice Flow/Jam Event Moving image on DVD
|
1996 |
DVD cabinet | Milltown Reservoir: An educational Experience Moving image on DVD
|
1997 |
DVD cabinet | EPA Milltown Cleanup Plan Moving image on DVD
|
2003 |
DVD cabinet | Groundwater Pollution in Milltown Moving image on DVD
|
2003 |
DVD cabinet | Milltown Dam Shutdown Audio recorded by Peter Nielson on CD
|
April 7, 2006 |
DVD cabinet | Milltown Dam Construction and Safety Moving image on DVD
|
2003 |
DVD cabinet | Milltown Dam Power Plant Shut Down Moving image on DVD
|
April 7, 2006 |
DVD cabinet | The Confluence of Two Rivers (2 copies) Moving image on DVD
|
2006 |
DVD cabinet | Milltown Dam Power Plant Shut Down (2 copies) Moving image on DVD
|
2006 |
DVD cabinet | Montana Power Company Ice Jam Moving image on DVD
|
Undated |
Names and SubjectsReturn to Top
Subject Terms
- Dam failures--Risk assessment
- Dam retirement--Environmental aspects
- Environmental policy--Montana--Milltown
- Hazardous waste site remediation--Montana--Milltown
- Sediment transport--Clark Fork Watershed (Mont. and Idaho)
Geographical Names
- Blackfoot River Watershed (Mont.)
- Clark Fork Watershed (Mont. and Idaho)
- Milltown (Mont.)--Environmental conditions
- Milltown Dam (Mont.)
- Missoula (Mont.)--Politics and government
Other Creators
-
Personal Names
- Nielson, Peter (creator)
Corporate Names
- Missoula Community Access Television (creator)
- Montana Power Company (creator)
- Northwestern Energy (creator)
- United States. Environmental Protection Agency (creator)
- United States. Federal Energy Regulatory Commission (creator)