Municipal Facilities

Jean Oxley Linn County Public Services Center


Following the devastating flood of 2008, Linn County Public Services Center went through a major renovation. It was imperative to incorporate innovative ways to manage stormwater while maximizing parking at the congested site.

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Hall & Hall Engineer’s (HHE) site design included pervious paver parking stalls, separate parking stalls for low-emitting and fuel-efficient vehicles, low-maintenance landscaping, and a reduction of construction waste through construction management techniques.

Project highlights

  • LEED Silver Rating
  • Pervious paver parking lot: rainwater filters through pavement stratum to underlying soils capturing pollutants
  • Art/Sculpture: HHE staff served on Linn County Public Arts Board during the selection of the artists for interior and exterior art pieces
  • Native landscaping: low to no irrigation needs

Fairfax Pedestrian Bridge & Trail


In the past decade, the City of Fairfax, IA has been growing to the north, but the new growth is separated from the older city core by Prairie Creek. Hall & Hall Engineers (HHE) provided the city with a design for a new pedestrian trail and bridge to span Prairie Creek, offering pedestrians and bicyclists a safe connection between the new and old areas of Fairfax.

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The trail and bridge included quarter-mile of eleven-foot wide x six-inch thick PCC trail and a 230’ long, fourteen-foot wide, pre-engineered steel truss trail bridge. It is the first of a multi-phase project to complete the connections between the northern and southern portions of the city and it utilized federal funding through the Transportation Enhancement portion of the Surface Transportation Program.

HHE assisted Fairfax through each phase of the project, including concept planning, identifying funding sources, property acquisition, permitting, design, and construction engineering.

 Services Provided

  • Assistance in applying for and securing Federal funding
  • Boundary & Topographic survey
  • Property acquisition services
  • Wetland delineation
  • Civil & Structural design
  • Construction administration & observation



Hall & Hall Engineers collaborated with the City of Coralville, IA and a local architect to provided professional engineering services, site design and layout for Coralville’s new Transit and Parks facility. A LEED Silver Certification was obtained via green strategies in stormwater management and by using native, low-maintenance vegetation.

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Services Provided

  • Site Design and Layout
  • Utility Infrastructure
  • Green Drainage and Parking Areas
  • Detailed Site Grading



The 2008 flood damaged the Cedar Rapids Public Works Building so severely it was determined the only viable option to demolish and replace the building upon the same site. The city selected Hall & Hall Engineers for the  $35M facility consolidated several departments into a single 360,000-SF facility.

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The project includes office space for 400 employees and a combined maintenance-storage facility for over 500 municipal service vehicles.

As encourages by city leaders, the facility showcased innovative and energy efficient design in a new facility receiving many daily visitors. Stormwater management is handled through infiltration processes in Bio-retention cells dispersed amongst the parking lot islands handles stormwater management through infiltration processes. The cells remove silt and harmful chemicals before the rainwater leaves the site by using a free draining soil medium and native plantings.

Project Features

  •  LEED Silver
  •  Bio-retention cells
  •  Native landscaping
  •  Entry plaza and courtyard
  •  Floodplain management



Hall & Hall Engineers provided the site design services for the new Hiawatha City Hall and considered ways to minimize construction and urban impacts to the environment, including the nearby McCleod Run. The McCleod Run is a protected 2.5-mile urban trout stream located in Cedar Rapids.
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HHE’s design includes the mitigation of stormwater run-off and a way to increase of on-site infiltration. Curb cuts lead into a bio-swale island and capture runoff from the parking lot; another bio-retention area near the front entrance manages site run-off from the south half of the parking area. Porous concrete parking stalls remove stormwater pollutants from vehicles and the surrounding site.

Native forbs and grasses keep maintenance low and provide visual interest throughout the seasons.

Services Provided

  • Bio-swale to capture parking lot run-off
  • Bioretention cell to manage water across steep grades.
  • Porous concrete stalls in rear parking lot