Project Information

Bid Title

Engineering Services for the Stormwater Management Program, RFQ 683950

Issuing Agency

Loudoun County

Location

Virginia

Published Date

Nov 5, 2025

Closing Date

Dec 9, 2025

Government Level

State & Local

Status

Closed

Ref. #

RFQ 683950

Original Source

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Bid Documents

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Project Description

Bid Number:	RFQ 683950
Bid Title:	Engineering Services for the Stormwater Management Program, RFQ 683950
Category:	Procurement
Status:	Open

Description: The intent of this Request for Proposal (RFP) is for the County of Loudoun, Virginia (County) to obtain the services of qualified engineering firms to establish one (1) or more fixed-fee, open-ended contracts for Professional Engineering Services in support of the County’s Stormwater Management Program. Services will be provided on an “as needed” basis for a one (1) year period with up to three (3) additional one (1)-year renewal options. The number of contracts awarded will depend on the number and quality of the proposals received, with a maximum of five (5) contracts. A County issued Purchase Order (PO) will precede the start of work for each individual task. Firms must demonstrate strong project management capabilities and technical competence in supporting stormwater programs that meet the Virginia Pollutant Discharge Elimination System (VPDES) Phase II Municipal Separate Storm Sewer System (MS4) General Permit requirements. Experience in the development, design, and implementation of Best Management Practices (BMPs) is essential. Publication Date/Time: 11/5/2025 3:50 PM Publication Information: Request for Proposal Closing Date/Time: 12/9/2025 4:00 PM Contact Person: Beth A. Cioni Please see the attached document RFQ 683950 for additional contact information. Download Available: See Related Documents Business Hours: 8:30 AM to 5:00 PM Related Documents: RFQ 683950 (PDF) View Solicitation Abstract (PDF)

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County of Loudoun, Virginia

REQUEST FOR PROPOSAL

ENGINEERING SERVICES FOR THE

STORMWATER MANAGEMENT PROGRAM

ACCEPTANCE DATE: Prior to 4:00 p.m., December 9, 2025 “Local Time”

RFP NUMBER:

RFQ 683950

ACCEPTANCE PLACE:

Department of Finance and Procurement

Division of Procurement

1 Harrison Street, SE, 1st Floor,

Procurement Bids and Proposals Drop Box

Leesburg, Virginia 20175

PLEASE NOTE:

A. Please contact the Contracting Officer designated on the front cover of the

solicitation with any questions regarding this process. Offerors are strongly

encouraged to check the County’s website routinely for updates.

B. Documents related to this solicitation may be downloaded from the County’s

website at https://www.loudoun.gov/bids.aspx.

Requests for information related to this Request for Proposal should be directed to:

Beth A. Cioni

Contracting Officer

(571) 627-7414

Beth.Cioni@loudoun.gov

Issue Date: November 5, 2025

IF YOU NEED ANY REASONABLE ACCOMMODATION FOR ANY TYPE OF DISABILITY

IN ORDER TO PARTICIPATE IN THIS PROCUREMENT, PLEASE CONTACT THIS

DIVISION AS SOON AS POSSIBLE.

RFP RFQ 683950

Engineering Services for the Stormwater Management Program

Page 1 of 48

REQUEST FOR PROPOSAL

ENGINEERING SERVICES FOR THE

STORMWATER MANAGEMENT PROGRAM

SECTION/TITLE

PAGE

1.0 PURPOSE ............................................................................................................ 3

2.0 COMPETITION INTENDED ................................................................................. 3

3.0 BACKGROUND INFORMATION ......................................................................... 3

4.0 (INTENTIONALLY OMITTED) ............................................................................. 4

5.0 SCOPE OF SERVICES ........................................................................................ 4

6.0 EVALUATION OF PROPOSALS & SELECTION PROCEDURES.................... 12

7.0 INSTRUCTIONS TO OFFERORS ...................................................................... 20

8.0 TERMS AND CONDITIONS ............................................................................... 26

9.0 PROPOSAL SUBMISSION FORM .................................................................... 45

Prepared By: s/Beth A. Cioni

Contracting Officer

Date: November 5, 2025

RFP RFQ 683950

Engineering Services for the Stormwater Management Program

Page 2 of 48

ENGINEERING SERVICES FOR THE

STORMWATER MANAGEMENT PROGRAM

1.0 PURPOSE

The intent of this Request for Proposal (RFP) is for the County of Loudoun, Virginia

(County) to obtain the services of qualified engineering firms to establish one (1) or

more fixed-fee, open-ended contracts for Professional Engineering Services in

support of the County’s Stormwater Management Program. Services will be provided

on an “as needed” basis for a one (1) year period with up to three (3) additional one

(1)-year renewal options.

The number of contracts awarded will depend on the number and quality of the

proposals received, with a maximum of five (5) contracts. A County issued Purchase

Order (PO) will precede the start of work for each individual task.

Firms must demonstrate strong project management capabilities and technical

competence in supporting stormwater programs that meet the Virginia Pollutant

Discharge Elimination System (VPDES) Phase II Municipal Separate Storm Sewer

System (MS4) General Permit requirements. Experience in the development, design,

and implementation of Best Management Practices (BMPs) is essential.

2.0 COMPETITION INTENDED

It is the County’s intent that this RFP permits competition. It shall be the Offeror’s (i.e.

any entity submitting a proposal in response to this RFP) responsibility to advise the

Purchasing Agent in writing if any language, requirement, specification, etc., or any

combination thereof, inadvertently restricts or limits the requirements stated in this

RFP to a single source. The Purchasing Agent must receive such notification not later

than fifteen (15) days prior to the date set for acceptance of proposals.

3.0 BACKGROUND INFORMATION

Loudoun County’s Stormwater Management Program oversees the planning, design,

maintenance, and regulatory compliance of the County-wide stormwater system. The

program is designed to manage both the quantity and quality of stormwater runoff,

with a particular focus on minimizing pollutants entering local waterways through

adherence to applicable state and federal regulations.

The County is subject to the National Pollutant Discharge Elimination System

(NPDES) Phase II Municipal Separate Storm Sewer System (MS4) Permit,

administered by the Virginia Department of Environmental Quality (DEQ). Under the

federal Clean Water Act—specifically 40 CFR §122.26—urbanized counties with

populations exceeding 50,000 are required to develop stormwater management

plans and secure discharge permits for stormwater outfalls. Currently, the eastern

unincorporated portion of Loudoun County, covering approximately 32.6 square

miles, falls within this regulatory framework. As population growth continues,

additional areas are expected to be included under Phase II regulation.

At the state level, Virginia’s DEQ issues Virginia Pollutant Discharge Elimination

System (VPDES) permits to local governments in accordance with federal and state

RFP RFQ 683950

Engineering Services for the Stormwater Management Program

Page 3 of 48

law. To comply with the Virginia Stormwater Management Act and the VPDES Phase

II MS4 General Permit, Loudoun County has adopted local ordinances and

implemented a comprehensive Stormwater Management Program that supports both

flood control and water quality protection.

The County’s program includes measures and procedures aligned with the six (6)

Minimum Control Measures (MCMs) required under the MS4 permit. Best

Management Practices (BMPs) have been developed for each MCM to guide

implementation:

• Public Education and Outreach

• Public Involvement and Participation

• Illicit Discharge Detection and Elimination

• Construction Site Runoff Control

• Post-Construction Runoff Management

• Pollution Prevention/Good Housekeeping

4.0 OFFEROR’S MINIMUM QUALIFICATIONS

Intentionally Omitted.

5.0 SCOPE OF SERVICES

All proposals must be made on the basis of, and must meet or exceed, the

requirements contained herein.

5.1 General Requirements

A. A purchase order must be issued for each task prior to the start of work.

The purchase order will constitute the notice to proceed unless

otherwise indicated.

B. Individual tasks may require the Consultant to provide the supervision,

manpower, materials, equipment, and supplies necessary to complete

the services outlined below.

C. All individuals performing work under this Contract must possess

appropriate licenses, certifications, or credentials relevant to the tasks

being performed.

D. All services shall be performed in compliance with industry standards

and all applicable federal, state, and local laws, ordinances, and

regulations, including but not limited to: Virginia State Health

Department requirements; the Virginia Uniform Statewide Building

Code (USBC); Virginia Occupational Safety and Health (VOSH)

Program and Occupational Safety and Health Administration (OSHA)

rules and regulations; and Virginia Department of Environmental

Quality (DEQ) standards.

RFP RFQ 683950

Engineering Services for the Stormwater Management Program

Page 4 of 48

E. Services under this Contract shall include, but are not limited to:

a. Evaluations, investigations, analyses, recommendations, cost

and time estimates, testing, reports, studies, designs,

preparation of documents (including drawings in latest

AutoCAD® (Computer-Aided Design) version and

specifications), and field inspections.

b. Professional involvement throughout all phases of a project,

including but not limited to: development of programs;

preparation of reports; periodic progress reports and meetings;

preparation for and participation in briefings and presentations to

staff groups, citizen groups, the County Board of Supervisors,

and federal or state agencies; timely processing of invoices for

services; and timely processing of project correspondence.

c. Coordination with County staff, other County contractors, and

related professional or non-professional services, as may be

directed by the County.

5.2 Fee/Rate Schedule

Hourly rates established under this Contract shall include:

A. Administrative items such as voice, data and video services; mailing

and printing services; courier services; and materials required for the

preparation of presentations, reports, submittals, and other expenses

typically incurred in the conduct of business.

B. Transportation to and from job sites; vehicles, fuel, and vehicle

maintenance; cell phones; personal computers; printers; cameras and

video equipment; software; general office supplies; home office and

administrative support; and all overhead and incidental costs.

5.3 Performance of the Consultant

During the term of the Contract, the County will review the Consultant’s

operations to determine compliance with contractual requirements. The

Consultant shall cooperate with and assist County representatives in

conducting these reviews. If deficiencies are identified, the Consultant shall

implement remedial action immediately. All County recommendations and

Consultant responses or actions shall be properly documented by the

Consultant.

No additional compensation shall be provided for remedial actions taken by

the Consultant to correct deficiencies identified by the County. Remedial

actions and required response times may include, but are not limited to, the

following:

A. Further subdividing assigned personnel responsibilities, reassigning

personnel, or assigning additional personnel.

B. Immediately replacing personnel whose performance has been

determined by the Consultant and/or the County to be inadequate.

RFP RFQ 683950

Engineering Services for the Stormwater Management Program

Page 5 of 48

Commodity Codes

• NAICS 541330Engineering Services

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