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CapexCue · Public evidence · Printed 11 Nov 2026
Explore projects / Project dossier

Boysen Unit of the Pick-Sloan Missouri Basin Program

United States · Energy

In-depth research Release 1

Project scope

The unit consists of Boysen Dam, Boysen Reservoir, and Boysen Powerplant. The dam is described as a 220-foot zoned earthfill structure with a radial-gate-controlled overflow spillway and outlet works. The reservoir has 802,000 acre-feet of total controlled storage capacity at elevation 4,725 feet. The powerplant has 15,000 kW of installed capacity in two 7,500-kW units. The separate 1908 concrete dam described in the history was about 1.5 miles downstream of the present dam site and was removed in 1948; it is not part of this scope.

Reported status and procurement

Reported development

Construction of Boysen Dam and Powerplant, including relocation of the CB&Q Railroad, began September 19, 1947, and was completed December 11, 1952. The construction account also describes relocation of 13.5 miles of track, a 1.25-mile tunnel, seven bridges, and two sidings.

Procurement availability
Unknown / not established

A source report alone does not establish current progress or an open buying window.

Project summary

The Boysen Unit of the Pick-Sloan Missouri Basin Program comprises Boysen Dam, Boysen Reservoir, and Boysen Powerplant on the Wind River in Wyoming. The source places the unit about 20 miles south of Thermopolis and separately describes the reservoir as about 20 miles upstream from Thermopolis. The dam is described as a 220-foot zoned earthfill structure, the reservoir as having 802,000 acre-feet of total controlled storage, and the powerplant as having 15,000 kW of installed capacity in two units. The historical construction account gives a start date of September 19, 1947, and completion date of December 11, 1952.

Evidence limits and unknowns

The supplied page text has no publication date, so current operating condition is not established.

The page does not establish current construction, rehabilitation, procurement, financing, or contract status.

The linked Boysen Unit PSMBP document and page media, including images and captions, are not covered by the supplied evidence.

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Project metadata

Country
United States
Based on reviewed release evidence
Region
North America
Category
Energy
Derived from released evidence
Physical assets
Hydropower

Based on this release's supporting evidence. Unresolved fields remain unclassified; these labels do not establish current progress or a buying window.

Released facts and supporting evidence

Each fact retains its source, uncertainty and time context. If a publisher page moves or is unavailable, use the recorded quotation and observation date below.

Project name

Source reported

Boysen Unit of the Pick-Sloan Missouri Basin Program

Attributed to USBR Boysen agency project narrative.

Source: US Bureau of Reclamation screened government project narrative · publication date not recorded · observed 2026-10-03

Sources and evidence · US Bureau of Reclamation screened government project narrative
Source published: Not recordedObserved: 2026-10-03

US Bureau of Reclamation screened government project narrative
Attributed to USBR Boysen agency project narrative

Technical record · Boysen Unit of the Pick-Sloan Missouri Basin Program
Evidence location
/html/body/div/div[4]/div/div[2]/div[3]/div[1]/h1
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
fe416739-b292-4562-81cc-17a0c4553ba3
Evidence reference
3a3846bb-5216-47a1-8dae-6efdcfc49fd6
Source revision
43ecf576-d8ce-492f-ab5e-8b58fc128da2
Content fingerprint
acbc5bd4c0656bfff0f9c7ed3a91f6b6dc308f875aaf7862079221e3cf70cdc5
Source address
https://www.usbr.gov/projects/index.php?id=500

Scope

Source reported

The unit consists of Boysen Dam, Boysen Reservoir, and Boysen Powerplant. The dam is described as a 220-foot zoned earthfill structure with a radial-gate-controlled overflow spillway and outlet works. The reservoir has 802,000 acre-feet of total controlled storage capacity at elevation 4,725 feet. The powerplant has 15,000 kW of installed capacity in two 7,500-kW units. The separate 1908 concrete dam described in the history was about 1.5 miles downstream of the present dam site and was removed in 1948; it is not part of this scope.

Attributed to USBR Boysen agency project narrative.

Source: US Bureau of Reclamation screened government project narrative · publication date not recorded · observed 2026-10-03

Sources and evidence · US Bureau of Reclamation screened government project narrative
Source published: Not recordedObserved: 2026-10-03

US Bureau of Reclamation screened government project narrative
Attributed to USBR Boysen agency project narrative

Technical record · The unit consists of Boysen Dam, Boysen Reservoir, …
Evidence location
/html/body/div/div[4]/div/div[2]/div[3]/div[4]/p[2]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
a664945c-fe9e-4b6b-8810-260c2fdb44d3
Evidence reference
f0df2dd3-2457-4f99-b59f-958e785868e9
Source revision
43ecf576-d8ce-492f-ab5e-8b58fc128da2
Content fingerprint
acbc5bd4c0656bfff0f9c7ed3a91f6b6dc308f875aaf7862079221e3cf70cdc5
Source address
https://www.usbr.gov/projects/index.php?id=500

Current activity

Reported as actual

Construction of Boysen Dam and Powerplant, including relocation of the CB&Q Railroad, began September 19, 1947, and was completed December 11, 1952. The construction account also describes relocation of 13.5 miles of track, a 1.25-mile tunnel, seven bridges, and two sidings.

Attributed to USBR Boysen agency project narrative.

Source: US Bureau of Reclamation screened government project narrative · publication date not recorded · observed 2026-10-03

Sources and evidence · US Bureau of Reclamation screened government project narrative
Source published: Not recordedObserved: 2026-10-03

US Bureau of Reclamation screened government project narrative
Attributed to USBR Boysen agency project narrative

Technical record · Construction of Boysen Dam and Powerplant, including relocation …
Evidence location
/html/body/div/div[4]/div/div[2]/div[3]/div[6]/p[2]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
dd246aab-85b3-4b2b-8a06-728de5ec21fe
Evidence reference
38abeb96-7faf-4d50-9b94-9877d1b31b3f
Source revision
43ecf576-d8ce-492f-ab5e-8b58fc128da2
Content fingerprint
acbc5bd4c0656bfff0f9c7ed3a91f6b6dc308f875aaf7862079221e3cf70cdc5
Source address
https://www.usbr.gov/projects/index.php?id=500

Location

Source reported

Wyoming, on the Wind River. The page places the unit about 20 miles south of Thermopolis; its recreation description places the reservoir about 20 miles upstream from Thermopolis.

Attributed to USBR Boysen agency project narrative.

Source: US Bureau of Reclamation screened government project narrative · publication date not recorded · observed 2026-10-03

Sources and evidence · US Bureau of Reclamation screened government project narrative
Source published: Not recordedObserved: 2026-10-03

US Bureau of Reclamation screened government project narrative
Attributed to USBR Boysen agency project narrative

Technical record · Wyoming, on the Wind River. The page places …
Evidence location
/html/body/div/div[4]/div/div[2]/div[3]/div[1]/div[2]/p[1]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
73d0c6ad-eee5-4b02-be87-cb3ba7e3b207
Evidence reference
0a9e8bfb-96d7-458f-b867-c92a8bfbd4c5
Source revision
43ecf576-d8ce-492f-ab5e-8b58fc128da2
Content fingerprint
acbc5bd4c0656bfff0f9c7ed3a91f6b6dc308f875aaf7862079221e3cf70cdc5
Source address
https://www.usbr.gov/projects/index.php?id=500
Source report history

Prior and superseded states remain labelled. Dates below identify source publication when known, otherwise source observation. They are not assumed event dates; each fact retains its own time qualifications.

  1. No material timeline events have been released.

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