Vendors and consultants
The firms that served the city: its engineers, attorneys, planners, auditors and financial advisors, the contractors who built its projects, and its utilities, with how long the records show them working for Tiffin, what the payables lists show the city paid them, and the projects and contracts they appear in.
106firms and agencies
84with payments on the payables lists
$45.3Mpaid to them Derived
12with a stated role (City Engineer, City Attorney …)
106 of 106 firms.
| Firm | Role | Years | Role on record | Paid |
|---|---|---|---|---|
| 3e Electrical… also 3e Electrical Engineering |
Engineering | 2023–2026 | $9,283 | |
| 80/380 Commerce Park also 80/380 Commerce Park, LLC |
Developer | 2017–2026 | $371k | |
| Action Sewer & Septic… also Action Sewer & Septic Ser |
Construction and contracting | 2008–2026 | $18k | |
| All American Concrete also All American Concrete, In |
Construction and contracting | 2017–2025 | $252k | |
| Alliant Energy | Utility | 1997–2026 | $1.77M | |
| Andersen Development Inc. | Developer | 2016–2026 | — | |
| At & T Mobility | Utility | 2023–2026 | $27k | |
| Atura Architecture | Architecture | 2023–2026 | $763k | |
| BerganKDV also Bergankdv |
Audit and accounting | 2023–2026 | Auditor 2023–now | $92k |
| Boomerang Corp | Construction and contracting | 2019–2026 | $7.03M | |
| Brain Engineering, Inc | Engineering | 2018–2026 | $1,594 | |
| Carew Landscaping &… also Carew Landscaping & Tru |
Construction and contracting | 2003–2026 | $250 | |
| Carter & Associates | Construction and contracting | 2020–2022 | $85k | |
| Cipco | Utility | 2023–2023 | $4,016 | |
| City of Coralville | Government agency | 1974–2026 | $148 | |
| City of North Liberty | Government agency | 1998–2026 | $22k | |
| Clear Creek Amana school district | Government agency | 1999–2026 | — | |
| Colony Plumbing… also Colony Plumbing Heating |
Construction and contracting | 2025–2025 | $1,217 | |
| Concrete Fusion | Construction and contracting | 2023–2024 | $14k | |
| Concrete Polyfix | Construction and contracting | 2023–2026 | $4,738 | |
| Cornerstone Excavating | Construction and contracting | 2013–2026 | $170k | |
| Corridor Energy… also Corridor Energy Coopera |
Utility | 2025–2026 | $50k | |
| Courts Fore Sports | Construction and contracting | 2021–2026 | $81k | |
| Cr Face Painting | Construction and contracting | 2021–2022 | $60 | |
| Dorsey & Whitney LLP also Dorsey & Whitney; Dorsey Whitney |
Legal, Bond counsel | 1998–2026 | Bond counsel 2011–now | $194k |
| East Central Iowa Council of Governments (ECICOG) also ECICOG; East Central Iowa Council of Governments |
Planning, Consulting, Government agency | 1986–2026 | Grants and planning 1990–now | $900 |
| Electric Motors of Iowa… also Electric Motors of Iowa C |
Construction and contracting | 2022–2025 | $571 | |
| Electric Pump | Construction and contracting | 2021–2021 | $328 | |
| Electronic Engineering | Engineering | 2021–2025 | $1,802 | |
| Engineered Equipment… also Engineered Equipment So |
Engineering | 2022–2026 | $34k | |
| Engineered Operations &… also Engineered Operations & Se… |
Engineering | 2023–2023 | $2,200 | |
| Engineering Services &… also Engineering Services & Prod… |
Engineering | 2022–2023 | $2,600 | |
| Ever-Green Landscape | Construction and contracting | 2008–2026 | $21k | |
| Fema | Government agency | 2021–2024 | — | |
| Freeman Construction… also Freeman Construction, Inc |
Construction and contracting | 2003–2026 | $106k | |
| Goodwin Law Office PC | Legal | 2018–2025 | $189k | |
| Grace Excavation | Construction and contracting | 2008–2021 | $8,238 | |
| Half Moon Landscaping | Construction and contracting | 2024–2026 | $45k | |
| Hart-Frederick Consultants also Hart Frederick Consultants; Hart Fredrick Consultants … |
Engineering | 1983–2026 | City Engineer 1983–now; City Engineer (annual appointment) 2010–2022 | $628k |
| HBK Engineering also HBK; HBK Engineering, LLC |
Engineering | 2014–2019 | — | |
| Hightower Development | Developer | 2019–2026 | — | |
| Holland, Michael, Raiber & Sittig PLC also Holland Michael Raiber; Holland, Michael, Raiber … |
Legal | 1984–2023 | City Attorney 1984–2023 | $135k |
| Iowa City Landscaping | Construction and contracting | 2021–2026 | $1,468 | |
| Iowa Department of Natural Resources | Government agency | 1990–2026 | — | |
| Iowa Department of Transportation | Government agency | 1981–2026 | — | |
| Iowa Development Group | Developer | 2018–2026 | $136k | |
| Iowa One Call | Utility | 2008–2026 | $7,663 | |
| Iowa State Revolving Fund (IFA/DNR) | Government agency | 2000–2026 | — | |
| Johnson County | Government agency | 2025–2025 | — | |
| Johnson County Board of Supervisors | Government agency | 1968–2026 | — | |
| Johnson County Conservation Board | Government agency | 2017–2021 | — | |
| Johnson County Council of Governments (JCCOG) also JCCOG; Johnson County Council of Governments … |
Planning, Government agency | 1970–2014 | Regional planning liaison 1977–1983 | — |
| Johnson County Sheriff's Office | Government agency | 1974–2026 | — | |
| Kline Electric Inc | Construction and contracting | 2023–2023 | $4,200 | |
| Kma Trucking & Excavating | Construction and contracting | 2015–2015 | — | |
| Kondora Plumbing &… also Kondora Plumbing & Heat |
Construction and contracting | 2023–2025 | $2,220 | |
| L.L. Pelling Company also L L Pelling; L.L. Pelling … |
Construction and contracting | 1962–2026 | $308k | |
| Linn County REC | Utility | 2004–2026 | $264k | |
| Logan Contractor… also Logan Contractor Supply |
Construction and contracting | 2024–2026 | $8,325 | |
| Martin Gardner Architecture | Architecture | 2018–2023 | $92k | |
| Master Built Concrete | Construction and contracting | 2016–2026 | $200k | |
| Masterbuilt Concrete… also Masterbuilt Concrete Do |
Construction and contracting | 2011–2022 | $3,989 | |
| Maxwell Construction | Construction and contracting | 1990–2025 | $9,656 | |
| McComas-Lacina Construction | Construction and contracting | 2023–2024 | — | |
| Mediacom | Utility | 2001–2026 | $17k | |
| Metro Pavers | Construction and contracting | 2011–2021 | — | |
| Midamerican Energy | Utility | 2008–2026 | $61k | |
| Midwest Home Builders | Construction and contracting | 2015–2024 | $3,350 | |
| Miron Construction Co | Construction and contracting | 2024–2026 | $9.54M | |
| MMS Consultants also MMS; MMS Consultants Inc … |
Engineering | 1988–2026 | $21k | |
| MSA Professional Services also MSA; MSA Professional Services, Inc. |
Engineering | 2011–2026 | City Engineer 2022–now | $4.77M |
| Mulford Plumbing &… also Mulford Plumbing & Heat |
Construction and contracting | 2023–2023 | $331 | |
| Neumiller Electric Inc | Construction and contracting | 2016–2026 | $412k | |
| Nolan's Lawn Care | Construction and contracting | 2020–2025 | $463k | |
| Northland Securities also Northland Securities, Inc. |
Financial advisor | 2011–2026 | Financial advisor 2011–now | $9,125 |
| Office of Auditor of State of Iowa also Auditor of State; Office of Auditor of State … |
Audit and accounting | 1966–2026 | Auditor (FY2016–17) 2017–2018 | $21k |
| Opn Architects | Architecture | 2024–2025 | $15k | |
| Phelan Tucker Law LLP also Phelan Tucker; Phelan Tucker Law |
Legal | 2023–2026 | City Attorney 2024–now | $103k |
| Portzen Construction | Construction and contracting | 2017–2024 | — | |
| Powers & Associates also Powers and Associates |
Engineering | 1962–1965 | Engineers (sanitary sewer plans) 1963–1965; Engineers (water system plan) 1964–1965 | — |
| Price Industrial, LLC | Construction and contracting | 2018–2026 | $1,000 | |
| Rathje Construction | Construction and contracting | 2014–2026 | $4.12M | |
| Rogers Concrete | Construction and contracting | 2022–2022 | $1,750 | |
| Shawver Well Company also Shawver Well Company, In |
Construction and contracting | 2021–2024 | $329k | |
| Shive-Hattery also Shive Hattery; Shive, Hattery Associates … |
Engineering, Architecture | 1978–2025 | Consulting engineers 1978–1979 | $30k |
| Snyder & Associates | Engineering | 2007–2020 | — | |
| South Slope Cooperative also South Slope Cooperative T |
Utility | 1998–2026 | $164k | |
| Steve's Electric | Construction and contracting | 2018–2026 | $87k | |
| Streb Construction also Streb Construction Compa… |
Construction and contracting | 1980–2025 | $2,342 | |
| Sulzco LLC | Construction and contracting | 2016–2017 | — | |
| Sutphen Corporation | Construction and contracting | 2023–2025 | $831k | |
| T-Mobile | Utility | 2026–2026 | $403 | |
| Terracon Consultants… also Terracon Consultants, Inc |
Engineering | 2025–2025 | $21k | |
| Tnt Landscaping LLC | Construction and contracting | 2025–2026 | $51k | |
| Trey Electric | Construction and contracting | 2021–2021 | $7,460 | |
| Tri-City Electric… also Tri-City Electric Company |
Construction and contracting | 2023–2026 | $5,503 | |
| Tricon Construction Group | Construction and contracting | 2021–2026 | $9.70M | |
| Triple B Construction | Construction and contracting | 2018–2020 | — | |
| US Cellular | Utility | 2018–2026 | $9,247 | |
| Veenstra & Kimm | Engineering | 2014–2025 | $94k | |
| Verizon | Utility | 2013–2024 | $23k | |
| Vieth Construction Corp | Construction and contracting | 2018–2022 | $109k | |
| Westech Engineering… also Westech Engineering, LLC |
Engineering | 2023–2023 | $154 | |
| Woodruff Construction | Construction and contracting | 2012–2026 | $1.08M | |
| Workforce Solutions | Consulting | 2021–2021 | $9,788 | |
| Wrh Inc | Construction and contracting | 2014–2018 | — |
How this list is made
A firm is listed when its name or its part in a project says what it does: a payee named as an engineering, law, architecture, accounting, planning, construction or utility firm, a project's engineer, contractor, architect, attorney or agency, a contractor of a city contract, or a firm a person added with its role and source page. General suppliers are in Spending. Payments to private individuals and to city staff are never counted here (privacy).
Years run from the first to the last time the firm shows up anywhere: named in minutes, agendas, resolutions, memos and contracts (claims lists not counted), on a payables list, in a contract or project, or in a role term. Paid is the sum of the payables lines read (2018, and 2021 to today); earlier payments are not in the archive's lists. Firms that changed their name or merged are one entry, with the former names listed.
Data last updated October 16, 2026. Built from the archive's documents; see how the data is built.