The stairs to the top of the Weldon Spring Site Disposal Cell are now open.

Visitors can once again climb the stairway to the top of the 75 feet high disposal cell during daylight hours, with a panoramic view of portions of both St. Charles and St. Louis counties. Visitors can also walk around the cell's 41-acre perimeter or visit the Interpretive Center. The site is free and open to the public.

A native plant garden with paths and benches welcomes visitors to the site. The 150-acre planted Howell Prairie features a wide variety of plants and wildlife and may be viewed from several trails and the disposal cell. 

The site serves as a trailhead to the multiuse 6-mile Hamburg Trail with connections to Missouri Department of Conservation trail systems, the Great Rivers Greenway trail network, and the historic Katy Trail State Park trail that stretches across the state along the Missouri River.

Busch-Weldon Greenspace Map

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LM’s Weldon Spring Site in Missouri represents a long legacy of service and a commitment to site cleanup and restoration.

Department of Energy Office of Legacy Management

Monday to Friday: 9 a.m. to 5 p.m.
Saturday and Sunday: 10 a.m. to 4 p.m.

Closed on federal holidays, New Year’s Day, Easter, and Christmas Day.

The Weldon Spring Site Interpretive Center is located in southwestern St. Charles County, Missouri, approximately 30 miles west of St. Louis. It is located on Missouri State Route 94, 2 miles south of the Route 94 and U.S. Highway 40/61 junction.

Weldon Spring Site Interpretive Center driving directions map.

The Weldon Spring Site Interpretive Center provides pre-K through collegiate educational programming at no charge. The interpretative center provides science, technology, engineering, math, history, and environmental science programs at multiple grade levels, all tied to the Next Generation Science Standards. On-site programs include hands-on activities and other engaging opportunities. Virtual programs are also available.

The Weldon Spring Site Interpretive Center permits non-profit and community groups to host events on-site free of charge. This includes the meeting rooms, the Weldon Spring Site Pavilion and Outdoor Education Area, and the secondary parking lot. You must apply to use these spaces. Please read through the Special Use Permission Policy before filling out the Meeting and Event application. Contact the interpretive center to submit an application and ask questions.

In consideration of federal property and the safety of visitors, please understand the following:

  • Video surveillance is conducted 24/7.
  • Authorization is required for any organized group activity.
  • Pets must be leashed at all times and are not permitted inside facilities (except trained service animals).
  • Gas- and battery-powered mobility devices are not allowed on trails or grounds (allowances made for disability requirements).


  • Alcohol
  • Illegal drugs
  • Campfires
  • Firearms
  • Hunting
  • Hot air balloons
  • Off-road access
  • Digging/cutting/removing
  • Overnight overflow parking
  • Remote-controlled items
  • Unmanned aerial systems

Violators will be prosecuted in accordance with Title 18 of the United States Code.

For more site information, or to report a site-related problem, call (636) 300-2601 during business hours.

Prohibited Activities

By authority of Title 41 Code of Federal Regulations (CFR) Part 102-74, packages, briefcases, and other containers in the immediate possession of visitors, employees or other persons arriving on, working at, visiting, or departing from Federal property may be inspected. Persons in and on property must at all times comply with official signs of a prohibitory, regulatory, or directory nature. All persons entering in or on this property are prohibited from the following:

(A) Loitering and exhibiting disorderly conduct

(B) Improperly disposing of rubbish, willfully destroying or damaging property, stealing property, creating hazards, throwing articles from or at a building, or climbing upon any part of the building

(C) Gambling

(D) Being under the influence of any drug or alcohol other than prescription medication

(E) Operating a motor vehicle on the property while under the influence of alcohol or drugs

(F) Soliciting, except: funds authorized by 5 CFR Part 950; by employees on authorized bulletin boards; labor organizations authorized by the Civil Reform Act of 1978

(G) Distributing free samples of tobacco products, as mandated by Section 636 of Public Law 104-52

(H) Posting, affixing or distributing materials, such as pamphlets, handbills, or flyers, except as authorized in 41 CFR Part 102-74.410, or when these displays are conducted as part of authorized government activities or by official permit

(I) Photographs of workspace for commercial or non-commercial purposes without permission

(J) Animals, other than authorized service animals

(K) Blocking entrances, driveways, walks, loading platforms, or fire hydrants

(L) Parking without authority, parking in unauthorized locations or in locations reserved for other persons, or parking contrary to the direction of posted signs

(M) Carrying or possessing explosives, or items intended to be used to fabricate an explosive or incendiary device, either openly or concealed, except for official purposes

(N) The possession of firearms or other dangerous weapons by all persons not specifically authorized by 18 United States Code 930. Violators will be subject to fine and/or imprisonment for periods up to five (5) years

A person found guilty of violating any rule or regulation in this subpart while on any property shall be fined under Title 18 United States Code, imprisoned for not more than 30 days, or both.

Weldon Spring Site Interpretive Center
7295 Highway 94 South, St. Charles, MO 63304
(636) 300–2601

For media, government officials, or community stakeholders’ inquiries, email: