Marion Roundabout Enhancements


Hall & Hall Engineer’s (HHE) landscape architecture team led the design of this premier roundabout which incorporates a collection of integrated components including landforms, sculptures, plants and walls working harmoniously together.

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Dynamic movement of changing forms, planes, and lines of the centerpiece is visually experienced from various vantage points. The eighty-three-foot diameter green space harkens to the rolling topography and agrarian heritage of eastern Iowa. HHE worked closely with the sculpture artist throughout the design process creating a unified theme through both art and landforms.

Services Provided

  • Landscape Architecture
  • Bidding Services
  • Construction Staking



Located in Ames, IA, the CyRide facility was sited in a floodplain and required the addition of concrete walls with removable flood gates to protect the building. If floodwaters did threaten in the future, gates will be installed to keep out up to four-vertical-feet of water. In serendipity, the concrete walls double as privacy walls for the building’s dining patio, adjacent to a high-traffic bus garage next door.

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These concrete walls also, double as privacy walls for the building’s dining patio, adjacent to a high-traffic bus garage. Prior to the merger with Hall & Hall Engineers, Loren Hoffman, of Hoffman Design Consultants, lead the site design of this project.

The CyRide’s design employed sustainable practices wherever possible, obtaining LEED Gold status, and was honored with an AIA Iowa Excellence in Sustainable Design Award in September 2008.

Services Provided

  • Underground cistern: catches, holds and recycles stormwater runoff for low-volume irrigation on the site.
  • Trees planted outside offices with East-facing windows to lend shade and reduce energy consumption
  • Native landscaping: absorbs pollutants and infiltrate stormwater



The City of Dyersville selected Hall & Hall Engineers (HHE) to provide master planning services for flood prone areas in the heart of their community.

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Immediately following the flood, the City and FEMA offered a voluntary buyout of the properties damaged. Thirty property owners participated in this program.

After the buyout, new strict guidelines limited redevelopment within the buyout areas to primarily green space. HHE carefully prepared a viable park plan and turned this significant greenbelt into a valuable asset for the community.

A number of amenities are proposed within the fifty-five-acre green space including disc golf, passive recreation areas with native prairie plots, community gardens, a community orchard and a farmers market pavilion. Walking trails also link the green space with the surrounding neighborhoods and invite social belonging, offering a quality of life that will attract people to live in the Dyersville community. When complete this green “necklace” will be a significant attraction that few other communities can match.

Elements of Master Plan

  • Active play areas
  • Disc Golf Course & Bocce and chess board courts
  • Considerations as a result of FEMA buy-out program
  • Farmers market pavilion & Community orchard
  • Edible public landscape
  • River walk and trails



The Prospect Meadows group selected Hall & Hall Engineers (HHE) began to create a vision for a ‘One-of-a-kind’ regional recreation destination sports complex. It will provide a new level of service nationally through the Perfect Game amateur baseball organization.

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Unusual for a sports field complex, the site’s elevation varies by forty-five (45) feet. Hall & Hall created several grading design iterations to minimize retaining walls and still maintain adequate site drainage.

The project’s tight timeline necessitated a change in scope from a “traditional” design into “design-build” midway through. HHE, then, worked closely with the ownership group to identify and hire a general contractor and prioritize the design activities. This allowed the majority of the site work to be completed at the critical deadlines, minimizing unnecessary design time.

The 140-acre project site includes seventeen ballfields, one miracle field, a lake, walking trails, a playground, a grand entry plaza, and many other site amenities. The lake will capture stormwater for storage and irrigation, and double as an amenity. Several elevated viewing plazas will blend into the site topography, showcasing vistas.

Services Provided

  • Master Planning
  • Civil Engineering
  • Land Surveying
  • Landscape Architecture
  • Construction Administration & Construction Staking



Kirkwood Community College requested Hall & Hall Engineers to create a unique and meaningful gateway design feature for their Linn County campus. The innovative wall design emulates mechanical gears and sprockets, capturing the essence of Kirkwood Community College‘s beginning as an educational institution.

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Technology and agriculture, in the past and still today, are integral parts of the Kirkwoods’ legacy.


  •  Landscape Architecture
  • Bidding & Construction Services
  • Construction Staking
  • Monument Signage Layout & Design
  • Theme Development
  • Detailed Site Grading