S-01 S-02 S-03 S-04 S-05 S-06 S-07 S-08 S-09 S-10 S-11

Minuteman Launch Facility S-10 (Sierra-10 LF), Yoder Wyoming

Latitude: 41.941019
Longitude: -104.477865

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Site Type: Missile Launch Facility - Silo
A LF consists of a launcher and an associated launch facility support building (LFSB). All facilities are enclosed within a security fence. The sites average about 1.6 acres in size and holds one missile.

Missile Type: LGM-30B Minuteman I; LGM-30G Minuteman III; LGM-118A Peacekeeper

Parent Base: F.E. Warren AFB

Missile Wing: 90th Missile Wing; 90th Strategic Missile Wing during SAC era

Missile Squadron: 400th Missile Squadron (former Peacekeeper-converted field)

Permanent Installation Number: 8708

Installation Location Code: GHZR

Missile Activated: June, 1965


Missile Deactivated September 19, 2005


Current Site Use: Former Minuteman / Peacekeeper launch facility; missile removed; site included in New START-era Peacekeeper silo-elimination planning; present parcel-level reuse not verified.

Site Ownership: Former U.S. Air Force missile-field property; post-disposal parcel ownership not verified.

Accessible: No public access confirmed; view only from public roads where legal; do not enter the property without current owner permission.

How the Peacekeeper Missile Worked

Map showing location of Minuteman Launch Facility S-10, Wyoming
Map 1: Showing location of Minuteman Launch Facility S-10, Wyoming

Map Showing Street Level location of Minuteman Launch Facility S-10, Wyoming
Map 2: Showing Street level location of Minuteman Launch Facility S-10, Wyoming

From the road, S-10 was meant to look like almost nothing: a fenced patch of Goshen County ground, power poles, a few hardened fixtures, and a buried launch structure that gave away little about its former purpose. That understatement is the point. Launch Facility S-10 was one of Sierra Flight's unmanned missile silos, controlled from S-01, and later one of the F.E. Warren launch facilities modified for the LGM-118A Peacekeeper program. Public coordinate records place S-10 in Goshen County, Wyoming, near Yoder, at approximately 41.941019, -104.477865. A public Peacekeeper field photo listing identifies the site as Francis E. Warren AF Missile Site S-10, PIN 8708, ILC GHZR, with a DMS coordinate of 41-56-28, 104-28-40, which closely matches the KMZ-derived decimal coordinate used here.

S-10 belonged to F.E. Warren Air Force Base's Minuteman missile field, first under the 90th Strategic Missile Wing in the SAC era and later under the 90th Missile Wing. Its Peacekeeper-era squadron was the 400th Missile Squadron. The parent control site for Sierra Flight was S-01 Missile Alert Facility / Launch Control Center. S-10 is no longer an active missile facility. The Peacekeeper mission at F.E. Warren ended on 2005-09-19, and the former Peacekeeper launch facilities were later included in New START-era silo-elimination planning.

S-10 occupied open rural land in Goshen County, northwest of Yoder and west of the tighter cluster of S-05 through S-09 sites.

S-10 was an unmanned launch facility, not a crewed command post. The missile crew served at S-01, while maintenance, communications, and security teams visited S-10 as needed. Public exterior photos from 2013 show the kind of surface evidence expected at a former Peacekeeper launch facility: open-range fencing, general views across the site, the silo area, a cathodic protection control box, and power poles.

S-10 began as a Minuteman launch facility in the F.E. Warren missile field and later passed through the Minuteman III-to-Peacekeeper conversion that affected 50 former Minuteman silos assigned to the Peacekeeper force. Official Air Force history states that F.E. Warren's Minuteman III missiles replaced Minuteman I in 1975, that Minuteman II was not deployed there, and that 50 Peacekeeper missiles were brought on alert in modified Minuteman III silos in 1988.

S-10 is a decommissioned former Minuteman / Peacekeeper launch facility. The missile is gone, and the site was included in the broader New START disposal framework for former Peacekeeper launch facilities at F.E. Warren. Public Air Force documentation for the 2013 silo-elimination program explains that the former Peacekeeper silos were empty and that elimination methods included explosive implosion or backfill, with post-elimination observation requirements under New START.

For the full Sierra Flight narrative, see S-01 Missile Alert Facility / Launch Control Center

Cronology

  • 1963 - The 90th Strategic Missile Wing was activated at F.E. Warren during the Minuteman buildup.
  • 1965-06 - The F.E. Warren Minuteman force was in the fully operational era; S-10 belonged to the Sierra Flight launch-facility network.
  • 1975 - Minuteman III replaced Minuteman I at F.E. Warren.
  • 1988 - Fifty Peacekeeper missiles were on alert in modified Minuteman III silos at F.E. Warren.
  • 2005-09-19 - The Peacekeeper mission at F.E. Warren ended.
  • 2007-06 - A Tank Closure Report for Launch Facility Sierra-10, F.E. Warren AFB, Wyoming, was listed in the 2013 silo-elimination environmental assessment bibliography.
  • 2011-02-05 - New START entered into force.
  • 2013 - The Final Environmental Assessment for Minuteman III and Peacekeeper Silo Elimination addressed former Peacekeeper launch facilities and associated missile alert facilities at F.E. Warren.
  • 2013-08-18 - Public photographs of S-10 were published in the AirForceBase.net Peacekeeper field photo set.
  • 2018-02-04 - New START required covered silo-elimination work to be completed by this date.

Current Google Satellite Image of Minuteman Launch Facility S-10, Wyoming
Aerial View 1: Current Google Satellite Image of Minuteman Launch Facility S-10, Wyoming Source: Google Maps - Click to View
Map Showing Sierra Flight Missile Silos & MAF Locations
Map 3: Map Showing Sierra Flight Missile Silos & MAF Locations Red Marker Shows Sierra-10 LF Location, Black Show MAF Location, Grey Shows the other Silos in the Flight

Read about the Peacekeeper Missile at F.E. Warren AFB

All Peacekeeper Missile Silo Locations

All Minuteman/Peacekeeper Missile Silo Locations