New Hampshire Motor Speedway, Loudon, NH, Loudon, NH


  • Roadway Design
  • Stormwater Management Design
  • NHDES AOT Permitting
  • 401 Water Quality Certification
  • USACE Wetland Permitting
  • Environmental Monitoring
  • Environmental Reporting
  • Hazardous Waste Reporting Review
  • Public Water Supply Sampling/Reporting

Loudon, NH

New Hampshire Motor Speedway (NHMS), a multi-use complex, is located on 1,100 acres and is considered one of the largest sports facilities in New England, featuring a 1.058-mile oval speedway, with a total capacity for 105,491 spectators, and a 1.6-mile road course. The speedway hosts the only NASCAR Sprint Cup Series events held in the six-state New England region.

Nobis provided engineering services early in the tracks existence to design a permanent dewatering system for the tunnels that allow entry to the track infield as a result of existing high groundwater conditions. Nobis continues to provide groundwater quality monitoring and permitting services at the facility to assess the potential impacts of current activities on brook water quality after racing events.

The most recent engineering services provided by Nobis include  alternatives analysis for proposed improvements, the expansion of usable area within the in-field by piping an existing brook under infield activities and filling wetlands, designing a new closed drainage system with storm water treatment systems in the infield and within other areas at the facility, providing flood storage for the brook downstream of the track as a result of removing an existing weir, and upgrading entry roads to the facility to meet Homeland Security requirements.

Approximately 1,800-ft of brook was piped through 72-inch pipe under the infield to create area for media, to improve spectator site lines, and to improve safety within the infield. Wetland areas associated with the brook were filled as a result of the brook piping and storm water system design. In total, 2-acres of wetlands were filled and another half-acre of temporary wetland impacts were permitted. Nobis conducted modeling of the existing brook and the proposed storm water system improvements. As part of the modeling, Nobis designed a flood plain area for the brook to mitigate removal of a weir and impacts to the wetland function due to flood flow alteration. The floodplain mitigation area was approximately 1.7 acres in area.

As a result of the magnitude of the improvements, coordination with U.S Fish and Wildlife, U.S. Army Corps of Engineers (USACE), NHDES Wetlands and Water Quality Bureaus, NH Fish and Game, and the U.S. EPA was paramount. Permits obtained by the project team included a Town of Loudon Site Plan Permit, a New Hampshire Department of Environmental Services (NHDES) Alteration of Terrain Permit, an NHDES 401 water quality certification, and a USACE wetlands permit.

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