Stormwater Management Services

The Town of Herndon, Virginia is requesting proposals for Stormwater Management Program Services under RFP 27-02, with sealed proposals due electronically September 22, 2026 at 11:00 a.m. Eastern Standard Time. A non-mandatory pre-proposal conference was held September 1, 2026; questions were due September 3, 2026.

The scope encompasses professional services to implement the Town's Stormwater Management Program and facility improvements, including support for Virginia Pollutant Discharge Elimination System permit compliance for Municipal Separate Storm Sewer Systems, ordinance and design standard updates, stormwater system studies, GIS database and BMP inventory management, feasibility studies and engineering design for infrastructure, construction administration, public meeting attendance, and assistance with federal and state grant funding opportunities. Offerors must be qualified licensed consultants. Proposals must not exceed 60 single-sided or 30 double-sided pages and must include a table of contents, cover letter, program understanding and approach, organizational chart, key personnel resumes with DPOR registration numbers, and completed proposal forms (Appendix A as Section 4). References provided must document three similar accounts completed within the previous five years.

The contract term is one year with renewal options for three additional one-year terms at the Town's discretion. Fee structure is negotiated on a task basis with hourly rates by skill level and discipline. Annual task-order spending is capped at $10 million; individual task orders are capped at $2.5 million. Fee adjustments at renewal are limited to the Consumer Price Index increase for the previous twelve months in the Washington-Arlington-Alexandria region.

Evaluation uses eight criteria: firm qualifications and experience (30 points), key personnel qualifications (20 points), staff availability (5 points), regulatory expertise (15 points), past project performance (10 points), quality assurance and control procedures (10 points), office location (5 points), and proposal quality (5 points). The Town reserves the right to award to the most qualified offeror based on best overall value, to negotiate with multiple offerors, and to reject all proposals. The incumbents are Kimley-Horn & Associates, Inc. and WSP USA Environment & Infrastructure Inc. General liability insurance of $2 million combined single limits and workers' compensation coverage compliant with Virginia law are required. Proof of non-debarred status from Virginia and the Town is mandatory. Addendum 1 clarifies that page limits apply comprehensively to all proposal materials, references must be current within five years, and Attachment B regarding proprietary information must be submitted and signed by all offerors.