Rocky Mountain Construction

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Rocky Mountain Construction
Company type
Private
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Headquarters
Hayden, Idaho
,
United States
Area served
Worldwide
Key people
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  • Darren Torr (President/CEO)
  • Jake Kilcup (COO)
ServicesRoller coasters, water parks, specialty construction
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Number of employees
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Websitewww.rockymtnconstruction.com

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Rocky Mountain Construction (RMC) is an American roller coaster manufacturing and construction company based in Hayden, Idaho, United States. It is best known for its I-Box track and Topper Track for wooden roller coasters. Founded by Fred Grubb and Suanne Dedmon in 2001, it has built over 20 roller coasters. In 2023, it merged with amusement ride manufacturer Larson International.

History

In 2001, Rocky Mountain Construction was established by Fred Grubb and Suanne Dedmon. Fred Grubb previously had experience in the construction industry having worked on custom homes and zoo exhibits. The company has worked on several projects including the construction of roller coasters, water parks, steel buildings, miniature golf courses and go kart tracks.[1]

In 2009 Alan Schilke of Ride Centerline began providing design and engineering work for Rocky Mountain Construction. He previously worked with Arrow Dynamics (later S&S Worldwide) to design Tennessee Tornado, Road Runner Express, and X.[2][3][4] Working with Rocky Mountain Construction, Schilke and Grubb designed the I-Box track for wooden roller coasters.[5] The first installation of this track technology debuted on New Texas Giant at Six Flags Over Texas in 2011.[6]

In late 2011, Schilke announced that the company would be working on two projects throughout 2012 which would both open in 2013.[7] These were later revealed to be an I-Box retrack of The Rattler at Six Flags Fiesta Texas and a new roller coaster designed from scratch at Silver Dollar City named Outlaw Run.[8][9] The track technology used for Outlaw Run, which allows a square beam of wood to be twisted, took 4 years to develop. It allows Rocky Mountain Construction to design layouts with maneuvers that are not traditionally possible with wooden roller coasters such as heartline rolls. Grubb has stated the technology could be used for new elements in the future.[10] Some new elements were realized with the announcement of Goliath at Six Flags Great America. The ride features an 85 degree drop as well as a dive loop and a zero-g stall. The ride opened in June 2014.[11]

In 2013, Rocky Mountain Construction signed a deal with Dutch amusement ride firm Vekoma. The agreement allows Vekoma to sell Rocky Mountain Construction's roller coasters outside the North American market.[12] In 2014, Kolmården Wildlife Park in Sweden announced plans to build the first Rocky Mountain coaster in Europe called Wildfire, which opened on June 28, 2016.[13] To handle increased demand, Rocky Mountain Construction opened a new factory, twice the size of their existing one, in August 2014.[14]

In a press release on April 11, 2023, amusement ride manufacturer Larson International, known for its Fire Ball models, merged with Rocky Mountain Construction.[15]

Technology

File:RMC Track Types (26669969379) (cropped).jpg
Topper Track (left) and I-Box Track (right) display at Rocky Mountain Construction's booth at IAAPA IAE 2017, with the Raptor Track display behind them to the right
  • I-Box Track (also known as Iron Horse Track): Rocky Mountain Construction's most common product. A formation of replacement steel track for wooden roller coasters. The first installation of this track was on Texas Giant at Six Flags Over Texas.[16][17]
  • I-Box (Large Track Version): Specifically designed to run the S&S Free Spin 4D coaster clones.
  • Topper Track: Installed on several coasters around the United States.[18][19][20] The track is designed to reduce the maintenance required for a wooden roller coaster and provide a smoother ride experience.[19][21] This steel track replaces the upper layers of laminated wood.[21]
  • Wooden roller coaster trains: specifically designed to run on the company's own Topper Track, however, they could be added to other wooden roller coasters as well. The trains feature steel wheels as opposed to polyurethane wheels found on most trains.[7][8]
  • 208 ReTrak: Debuting in 2021 on Silverwood's Tremors roller coaster, similar to the I-Box track, 208 is designed to be used as a replacement for sections of old wooden coasters to decrease maintenance and add lifespan to the coaster as well as increase rider comfort and enjoyment.
  • Wild Moose: A version of the classic wild mouse coaster type using I-Box track, featuring entirely redesigned trains and a compact layout.
  • Raptor Track: A single rail steel track that features inline seating for passengers.
  • T-Rex Track: Similar to Raptor track, the T-Rex track is a single rail track. It is a larger single rail model that permits two seat-wide trains on the track rather than one.
  • Swing Axle Trains: Debuting in 2018 on Twisted Timbers, the Swing axle train features a pivoting front axle allowing for smoother transitions between elements.

List of roller coasters

As of January 2026, Rocky Mountain Construction has built or refurbished 29 roller coasters around the world.[22] As of 2026, all of them are currently operating.

Name Model Park Country Converted From Opened Status Ref Image
New Texas Giant I-Box - Steel Six Flags Over Texas Template:Flagicon United States Texas Giant 2011 Operating [23]
[6]		 File:The NEW Texas Giant.jpg
Outlaw Run Topper Track - Wood Silver Dollar City Template:Flagicon United States N/A 2013 Operating [24] File:Outlaw Run Roll.jpg
Iron Rattler I-Box - Steel Six Flags Fiesta Texas Template:Flagicon United States Rattler 2013 Operating [25]
[8]
[26]		 File:Iron Rattler 28 crop.jpg
Medusa Steel Coaster I-Box - Steel Six Flags Mexico Template:Flagicon Mexico Medusa 2014 Operating [27] File:Medusa lift hill, Six Flags Mexico.jpg
Goliath Topper Track - Wood Six Flags Great America Template:Flagicon United States N/A 2014 Operating [28] File:Goliath at Six Flags Great America (14696982188).jpg
Twisted Colossus I-Box - Steel Six Flags Magic Mountain Template:Flagicon United States Colossus 2015 Operating [29]
[30]		 File:SFMM- Twisted Colossus.jpg
Wicked Cyclone I-Box - Steel Six Flags New England Template:Flagicon United States Cyclone 2015 Operating [31]
[32]		 File:Wicked Cyclone Media Day (17745251928).jpg
Wildfire Topper Track - Wood Kolmården Template:Flagicon Sweden N/A 2016 Operating [33]
[13]		 File:WildfireKolmården2017.jpg
Wind Chaser
Formerly Storm Chaser		 I-Box - Steel Kentucky Kingdom Template:Flagicon United States Twisted Twins 2016 Operating [34] File:StormChaser Entrance.jpg
The Joker I-Box - Steel Six Flags Discovery Kingdom Template:Flagicon United States ROAR 2016 Operating [35] File:Six Flags Discovery Kingdom (27297618681).jpg
Lightning Rod Topper Track & I-Box - Wood & steel[36] Dollywood Template:Flagicon United States N/A 2016 Operating File:LightningRod-Entrance.jpg
Twisted Timbers I-Box - Steel Kings Dominion Template:Flagicon United States Hurler 2018 Operating [37] File:Twisted Timbers Sign and Lift Mar 2018.jpg
Steel Vengeance I-Box - Steel Cedar Point Template:Flagicon United States Mean Streak 2018 Operating [38] File:Steel Vengeance Drop View.jpg
Twisted Cyclone I-Box - Steel Six Flags Over Georgia Template:Flagicon United States Georgia Cyclone 2018 Operating [39] File:SFOG TwistedCyclone.JPG
Wonder Woman Golden Lasso Coaster Raptor Track - Steel Six Flags Fiesta Texas Template:Flagicon United States N/A 2018 Operating [40]
[41]		 File:Wonder Woman GLC 3.18.jpg
RailBlazer Raptor Track - Steel California's Great America Template:Flagicon United States N/A 2018 Operating [42] File:RailBlazer (44990050352).jpg
Hakugei I-Box - Steel Nagashima Spa Land Template:Flagicon Japan White Cyclone 2019 Operating [43] Hybrid_Coaster_Hakugei
Untamed I-Box - Steel Walibi Holland Template:Flagicon Netherlands Robin Hood 2019 Operating [44]
[45]		 File:Walibi Holland Untamed first drop.jpg
Zadra I-Box - Steel Energylandia Template:Flagicon Poland N/A 2019 Operating [46] File:Zadra (Energylandia) - First Drop.jpg
Stunt Pilot Raptor Track - Steel Silverwood Theme Park Template:Flagicon United States N/A 2021 Operating [47] File:Stuntpilot4.jpg
Jersey Devil Coaster Raptor Track - Steel Six Flags Great Adventure Template:Flagicon United States N/A 2021 Operating [48] File:Jersey Devil Coaster 1.jpg
Iron Gwazi I-Box - Steel Busch Gardens Tampa Bay Template:Flagicon United States Gwazi 2022 Operating [49] File:Iron Gwazi - Busch Gardens Tampa.jpg
Wonder Woman Flight of Courage Raptor Track - Steel Six Flags Magic Mountain Template:Flagicon United States N/A 2022 Operating [50] File:Wonder Woman Flight of Courage 10.jpg
ArieForce One I-Box - Steel Fun Spot Atlanta Template:Flagicon United States N/A 2023 Operating [51][52]
Wildcat's Revenge I-Box - Steel Hersheypark Template:Flagicon United States Wildcat 2023 Operating [53]
Fire in the Hole I-Box - Steel[54] Silver Dollar City Template:Flagicon United States N/A 2024 Operating [55]
Sköll & Hati Raptor Track - Steel Gyeongju World Template:Flagicon South Korea N/A 2024 Operating [56]
YoY Raptor Track - Steel Walibi Holland Template:Flagicon Netherlands N/A 2025 Operating [57] File:Walibi-holland-yoy-thrill.jpg
Fire Runner Raptor Track - Steel Lost Island Theme Park Template:Flagicon United States N/A 2025 Operating [58]
Unknown Raptor Track - Steel Family Kingdom Template:Flagicon United States N/A 2027 Under Construction [59]
Unknown I-Box - Steel Walibi Belgium Template:Flagicon Belgium Loup-Garou 2028 Under Construction [60]

Other projects

Topper Track, no layout changes

Construction

Source:[61]

Repairs

Source:[61]

Miscellaneous

File:Silverwood wavepool1.jpg
The wave pool at Boulder Beach was constructed by Rocky Mountain Construction

Source:[61]

References

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