Klingner & Associates, P.C.
Founded in 1905 to do water resources engineering on the Mississippi, and it has worked on nearly every federal levee between St. Louis and Rock Island. Its Sny Island interior drainage study is cited inside a state-published hazard mitigation plan, and it was engineer of record on the roughly $9M Muscatine Island Levee Improvement Project with USACE Section 408 permitting. It also performs FEMA levee accreditation analysis under 44 CFR 65.10.
Who runs it
- William Klingner ✓ PE, CFM - named ACEC Young Professional of the Year for managing levee reconstruction and flood protection repairs after the 2019 flood
- Joshua T. Leyh ✓ PE - engineer of record contact on the Muscatine Island Levee Improvement Project bid documents
- Gavin Risley ✓ CFM - listed with this employer in the IAFSM certified floodplain manager directory
Credentials & verification
- CFM (Certified Floodplain Manager)
- Two CFMs verified by name through the Illinois Association for Floodplain and Stormwater Management directory, which publishes employer alongside credential
- Years in business
- Founded 1905
Services
Service area
Quincy IL · Davenport IA · Muscatine IA · Hannibal MO · Mississippi River corridor · Illinois River basin
Our verification notes
Offices on both sides of the river, Quincy IL and Davenport IA, listed here as one firm rather than two. The strongest credential set found in the middle Mississippi valley: named PEs who are also CFMs, verified through the Illinois floodplain association's own directory rather than the firm's website. Note one press source expands CFM incorrectly as 'Certified Flood Manager'; the correct term is Certified Floodplain Manager.
Sources checked
- https://acppubs.com/CD/article/7C2F6403-william-klingner-of-klingner-and-associates-in-quincy-illinois-named-acec-young-professional-of-the-year
- https://www.illinoisfloods.org/about/floodplain-manager-certification/online-CFM-directory?page=8
- https://iemaohs.illinois.gov/content/dam/soi/en/web/iemaohs/recovery/documents/countyplans/plan-pikecounty.pdf
- https://projects.constructconnect.com/details/6312407-water-sewer-site-work
- https://www.wqad.com/article/news/local/muscatine-island-levee-army-corps-of-engineers-iowa-9-million-dollars/526-e0e2fcbb-fcec-48d5-b7d0-95aefe1f77dd
Last verified 2026-08-13. This is an independent listing, not an endorsement, and we are not affiliated with Klingner & Associates, P.C.. Confirm the current license, insurance and references directly before signing any contract.
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