Johnson County Ionwave #2026-058

Johnson County Stormwater Management and Engineering Services

Johnson County, Kansas, is seeking qualified firms for on-call stormwater management and engineering services to support flood-risk reduction, water quality, and watershed improvements. - Government buyer: Johnson County, Kansas — Financial Management and Administration, Purchasing Division; solicitation contact identified as Kyra Smith. Work orders must be authorized by the Operations or Stormwater Management Division of Johnson County Public Works. - Services requested: Hydrologic and hydraulic modeling; floodplain mapping and management, including FEMA map changes and amendments; hydromodification and geomorphology assessments; stormwater asset management and condition assessments using the NASSCO rating system; water-quality modeling and monitoring; best management practice (BMP) design and support; watershed and integrated planning; grant assistance; ArcGIS and ArcGIS Online support; and surveying. - Illustrative study: Evaluate two alternatives for a watershed improvement project intended to remove three homes from the floodplain, reduce street flooding at two locations, and restore 1,000 feet of stream bank. Tasks include cost estimates, feasibility and effectiveness evaluation, residual Post-Project RIPP scoring, QA/QC documentation, a report, and a presentation. The sample cost proposal assumes 648 hours across personnel classifications; firms must provide billing and standard expense rates. - Products and OEMs: This is a services procurement, with no specified product quantities or part numbers. No OEMs or commercial vendors are named. FEMA and NASSCO are referenced in connection with floodplain requirements and condition-rating methods; ArcGIS and ArcGIS Online are identified as tools, but no software manufacturer is named. - Notable requirement: Digital deliverables must meet WCAG 2.1 Level A and AA accessibility standards. Scopes, schedules, deliverables, and fees will be agreed for individual assignments, which may be small or ad hoc.

Description

Johnson County is requesting proposals for comprehensive stormwater management services. Potential services include hydrology and hydraulic modeling, floodplain mapping and management, hydromodification and geomorphology, system management, and water quality modeling and monitoring. Requested work is not limited to the listed areas; individual project scopes, deliverables, schedules, and fees will be agreed upon before work begins. The response deadline is December 1, 2026, at 2:00 PM CT.

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