Consultant Demand Services on an Annual Contract

RP016-26 Page 1
May 13, 2026
REQUEST FOR PROPOSAL
RP016-26
The Gwinnett County Board of Commissioners is soliciting competitive sealed proposals from qualified
consultants for Consultant Demand Services on an Annual Contract for the Department of Water
Resources.
Proposals must be returned in a sealed container marked on the outside with the Request for Proposal
number and Company Name. Proposals will be received until 2:50 P.M. local time on July 29, 2026, at the
Gwinnett County Financial Services - Purchasing Division - 2nd Floor, 75 Langley Drive, Lawrenceville,
Georgia 30046. Any proposal received after this date and time will not be accepted.
The proposal opening will be virtual ONLY. To access the proposal opening virtually, visit the following link:
https://teams.microsoft.com/meet/289473811163273?p=81u85LYUXE9A2vkbon,
or dial 323-676-6170 and enter Conference ID 849 179 439#. A list of firms submitting proposals will be
available the following business day on our website www.GwinnettCounty.com.
A virtual pre-proposal conference is scheduled for 10:00 A.M. on June 18, 2026. To access the pre-
proposal conference virtually, visit the following link:
https://teams.microsoft.com/meet/244203200616854?p=7mFsQz7LNmXX5BfewX or dial 323-676-
6170 and enter Conference ID 652 100 697#. All consultants are urged to attend.
Questions regarding proposals should be directed to Anna West, Purchasing Associate II at
Anna.West@GwinnettCounty.com or by calling 770-822-7862, no later than June 10, 2026. Proposals are
legal and binding upon the vendor when submitted. One unbound original and five (5) copies should be
submitted.
Successful consultants will be required to meet insurance requirements. The Insurance Company should
be authorized to do business in Georgia by the Georgia Insurance Department, and must have an A.M. Best
rating of A-10 or higher.
Gwinnett County does not discriminate on the basis of disability in the admission or access to its programs
or activities. Any requests for reasonable accommodations required by individuals to fully participate in
any open meeting, program or activity of Gwinnett County Government should be directed to the ADA
Coordinator at the Gwinnett County Justice and Administration Center, 770-822-8165.
The written proposal documents supersede any verbal or written prior communications between the
parties.
Selection criteria are outlined in the request for proposal documents. Gwinnett County reserves the right
to reject any or all proposals to waive technicalities, and to make an award deemed in its best interest.
Award notification will be posted after award on the County website, www.gwinnettcounty.com and
companies submitting a proposal will be notified via email.
We look forward to your proposal and appreciate your interest in Gwinnett County.
Anna West
Purchasing Associate II

RP016-26 Page 2
I. INVITATION TO SUBMIT PROPOSALS
A. The Gwinnett County Department of Water Resources (GCDWR) hereby requests Proposals from
consultants for Consultant Demand Services on an Annual Contract with four options for renewal. This
submission will assist Gwinnett County in selecting consulting firms to provide demand services for the
County in its implementation of its capital improvement and operating programs.
GCDWR needs sufficient information to determine that your firm is adequately staffed and capable of
providing annual consultant demand professional services for one or more of the following service
categories where your firm may attempt to qualify.
* Service Category A - Water and Water Reclamation Facilities and Pump Station Services
* Service Category B - Water Line, Sewer Line and Reuse Water Line Services
* Service Category C - Watershed and Stormwater Infrastructure Services
* Service Category D - Dam Services
* Service Category E - Asset Management, Data Management, Planning and Modeling Services
* Service Category F - Programmatic Rehabilitation Management Services
* Service Category G - Specialized Support Services
Gwinnett County has a separate annual contract for "Comprehensive Materials & Field Testing and
Miscellaneous Services" which includes geotechnical services. Providing geotechnical services are not
required under any of the above listed Service Categories.
Gwinnett County intends to select a minimum of three (3) firms under each of the Service Categories.
Depending on the number of proposals and different types of specialized services submitted for Service
Category G, there is no specified minimum or maximum number of firms to be selected under Service
Category G. The minimum numbers noted above are not guaranteed, Gwinnett County reserves the right
to award to a smaller or larger number of firms, if in the County's best interest.
A separate proposal is required for each Service Category from firms if they wish to be considered for
that specific Service Category. Consultants shall submit one independent proposal for each Service
Category addressing criteria requested under Section IV. PROPOSALS and one independent fee
schedule for each Service Category as required under Section V. PROPOSAL FEE SCHEDULE.
B. Partnering, Teaming, and Subconsultants
Partnering, teaming and subconsultants will be permitted as part of the proposal for every category with
the exception of Category G - Specialized Support Services. For Service Categories A through F, if
partnering or teaming, all of the teaming partners, and/or subconsultants must be clearly identified and
the reasons and benefits to the County for this teaming arrangement presented.
C. Proposal
One (1) unbound original - single sided (designated as the original), five (5) bound copies (may be double
sided), and one (1) electronic version of the proposal should be submitted on a thumb drive. All copies
of the proposal must be identical. The electronic version should be one .pdf file that is identical to the
hard copies and not multiple files.
The full cost of proposal preparation is to be borne by the proposing firm. The original proposal must be
signed in ink by a company official who has authorization to commit company resources. These officials
will also be individuals noted as authorized to sign Work Authorizations.

RP016-26 Page 3
Proposals shall be submitted in a sealed envelope/package. Envelope/package shall be addressed to
the following and labeled as shown below:
Gwinnett County Purchasing Division
Gwinnett Justice and Administration Center - Second Floor
75 Langley Drive
Lawrenceville, Georgia 30046
RP016-26 Consultant Demand Services on Annual Contract
Service Category (insert Service Category Letter - Category Name)
Company Name
D. Proposal Fee Schedule
The Proposer is to submit, in a separately sealed envelope, one (1) original copy of their Proposal Fee
Schedule per category proposing. Envelope/package shall be addressed to the following and labeled as
shown below:
Gwinnett County Purchasing Division
Gwinnett Justice and Administration Center - Second Floor
75 Langley Drive
Lawrenceville, Georgia 30046
RP016-26 Consultant Demand Services on Annual Contract
Service Category (insert Service Category Letter - Category Name)
Company Name
FEE SCHEDULE
E. Consultant Proposal Development and Submittal Responsibilities
Request for Proposal Questions: All questions concerning this RFP should be directed IN WRITING by
the date indicated on the cover page of the invitation.
Where appropriate, County responses to formal questions will be in writing and will be distributed to all
firms on our record as having received a copy of this RFP.
Please note that it is the Consultant's responsibility to confirm with the Purchasing Associate that the
Proposer is on record as having received a copy of this RFP and associated addendum. In each case of
formal questions, the County will determine whether a response is appropriate or necessary. If questions
require a formal response or changes are made to the RFP, an Addendum(s) will be issued to all
proponents via email to the address on file.
Proposal Development Costs. Gwinnett County will not pay any Consultant or Subconsultant for work
done in preparation of this proposal submittal.
Proposal Submittal. Sole responsibility rests with the firm to ensure that their proposal(s) are received
on time at the above stated location.
Proposals submitted by alternate means other than those specified in this solicitation will be rejected
and disposed of accordingly. This includes proposals sent by facsimile, email, or any other electronic or
telegraphic means. If the County receives a proposal through such alternate means, the County does not
assume any burden or liability to notify the Consultant that the proposal has been rejected.

RP016-26 Page 4
Proposers are to follow the instructions outlined in this solicitation and failure of the Proposer to do so
may result in the County deeming the Proposer's submittal as non-responsive. Firms are expected to
allow adequate time for delivery of their proposals either by hand delivery, postal service or other means.
Late proposals will not be accepted and will be returned to the Proposer. If hand delivering, allow extra
time as you will be required to go through security.
F. No Communication Period
Between the date of the issuance of the solicitation and the date of the final contract award by the Board
of Commissioners, individuals, firms and businesses seeking an award of a Gwinnett County contract
may not initiate or continue any verbal or written communications regarding a solicitation with any
County officer, elected official, employee or other County representative without written permission of
the Purchasing Associate named in the solicitation. Violations will be reviewed by the Purchasing
Director. If determined that such communication has compromised the competitive process, the offer
submitted by the individual, firm or business may be disqualified from consideration for award. This
process is to ensure that all prospective respondents have the same level of knowledge relative to the
RFP, as well as ensuring any additional data is made available to all proposers.
G. Proposals Received
Submitted proposals and all documentation regarding the proposals will not be made available to the
public until such time that an official action has been taken by the Gwinnett County Board of
Commissioners to award or reject this solicitation. All proposals and supporting materials, as well as
correspondence relating to this RFP, become property of Gwinnett County when received and will be
subject to the Georgia Open Records Act.
H. Legal
All applicable State of Georgia and Federal laws, City and County ordinances, licenses and regulations of
all agencies having jurisdiction shall apply to the consultants and services throughout and incorporated
herein by reference. The Agreement with the selected firm, and all questions concerning the execution,
validity or invalidity, capacity of the parties, and the performance of the Agreement, shall be interpreted
in all respects in accordance with the Charter and Code of Gwinnett County and the laws of the State of
Georgia.
I. Work Authorizations
Following award of the selected firms under each Category of this contract, firms will be contacted based
upon their qualifications and experiences to develop an approach and fee for Work Authorizations for a
specific project. For each work authorization, the County will select the most qualified firm to submit a
Work Authorization proposal that it deems would provide the best service/value for the specified project
and/or is in the best interest of the County. GCDWR will be mindful of the current level of participation
and equitable distribution of work in Service Categories A through F.
Based on the County's current needs, the County does not anticipate requesting competing work
authorization proposals from multiple consultants for a single project unless the County and the
Consultant cannot agree to the project specific terms and conditions.
For approved Work Authorizations spanning more than one calendar year, a Purchase Order will be issued
for the initial calendar year using the cash flow forecast amount presented by the Demand Service
Consultant. The Purchase Order will be increased each calendar year based on the cash flow forecast
until the Work Authorization has reached its Not-to-Exceed amount or the contract term is ended. For
approved Work Authorizations that will be completed within a single calendar year, the Purchase Order
will be issued for the full Work Authorization amount.

RP016-26 Page 5
No minimum or maximum amount of work is guaranteed for each selected firm under this solicitation,
and work will be procured on an as-needed basis via Work Authorization approvals per request. GCDWR
will be mindful of equitable work distribution among the selected consultants for Service Categories A
through F. Gwinnett County will not pay any Consultant or Subconsultant for work done in preparation
of work authorization proposals.
II. INSTRUCTIONS TO CONSULTANTS
A. Consultant Qualifications
No proposal shall be accepted from and no contract will be awarded to any person, firm, or corporation
that is in arrears to Gwinnett County, upon debt or contract that is a defaulter, as surety or otherwise,
upon any obligation to Gwinnett County or that is deemed irresponsible or unreliable by Gwinnett County.
If requested, consultant shall be required to submit satisfactory evidence that they have a practical
knowledge of the particular service proposed upon and that they have the necessary staffing and
financial resources to provide the proposed service category called for as described in Section III.
DESCRIPTION OF SERVICES of this RFP
B. Annual Consultant Demand Services Agreement
The Consultant will be expected to sign an Annual Consultant Demand Services Agreement for
professional services developed by Gwinnett County (Sample Annual Consultant Demand Services
Agreement included). The proposal should contain a statement that the Consultant has carefully
reviewed the agreement, can meet all insurance and other requirements, and if selected, will sign the
agreement. No modifications to the agreement will be permitted. This information must be included in
the cover letter as referenced in Section IV. PROPOSALS of this RFP.
Selected consultant(s) are required within ten (10) days of the Notice of Award to provide the
following:
* Certificate of Insurance specified in proposal
* Two (2) sets of properly executed contract documents.
C. Local Small Business
Gwinnett County Government encourages the participation of all businesses in offering their services
and/or products. The Gwinnett County Government has the goal to fairly and competitively procure the
best product at the most reasonable cost. The County also desires to identify Local Small Business
participation in our contracts and to quantify that participation. The Consultant is requested to indicate
any Local Small Business in your submittal, on the firm information page. A Local Small Business is
defined as any business or firm that is independently owned and operated with either 100 or fewer
employees or $10 million or less in gross receipts per year, and that has an office located within the
boundaries of Gwinnett County or a municipality within Gwinnett County and holds a current Gwinnett
County Occupational Certificate or its equivalent issued by a municipality within Gwinnett County.
III. DESCRIPTION OF SERVICES
A. Service Category A - Water and Water Reclamation Facilities and Pump Station Services
The consultant shall provide professional services as requested by the County to improve, repair, expand
and modify County water facilities, water reclamation facilities, pump stations, and other facilities. Linear
infrastructure integral to facility operations may also be included in projects in this category.

RP016-26 Page 6
This effort will include, but not be limited to, project scope development, review of records, research of
design criteria and investigation of materials, construction methods and equipment, and other necessary
functions related to the specific project; coordination of reports in written and graphic form; preparation
of Opinion of Probable Construction Cost (OPCC) using AACE Class 1, 2, 3, 4 standard; Design
Development Services; Basis of Design reports; instrumentation and control design and support services;
standard operating procedures for input into Gwinnett County GCDWR's Electronic O&M platform;
preparation of a summary for the Basis of Design report; preparation of construction contract documents
suitable for bid conforming to applicable Federal or State regulations and Gwinnett County ordinances;
and bid phase services including bid advertisement, bidders pre-qualifications, response to questions
from suppliers, manufacturers, and potential bidders, preparation of addendum and conformed
documents, preparation of agenda and meeting minutes, bid tabulation, and recommendation for award
of contract and permitting.
The consultant will perform surveys as requested by the County in support of the design of water, water
reclamation and pump station facilities under this contract and as otherwise required for the operation
of these systems. These surveys may include cadastral surveys, topographical surveys, engineering
surveys, hydrographic surveys, boundary surveys, seismic refraction surveys, as-built surveys, surveys
for definition of easement areas - both existing and proposed, and construction surveys for line and
grade of proposed pipelines.
The Consultant may perform subsurface investigation and related tasks in obtaining applicable
underground utility information and data required under this service category. These include:
investigations to be performed throughout Gwinnett County on an as-needed and as-requested basis;
provide subsurface utility designating and reporting; provide all engineering services in identifying and
evaluating features and properties of unknown underground utilities and other subsurface facilities;
provide engineering report of findings; provide subsurface utility location coordination and reporting;
provide all engineering services in determining horizontal and vertical alignments of underground utilities;
and provide engineering report of findings.
Additional services provided may include, but are not limited to, professional opinions and filing survey
documents with the appropriate departments/agencies. Survey services shall be offered with billing rates
to address conventional services as well as survey grade versus mapping grade GPS services.
Construction management services and Engineering Services during construction will include, but not
be limited to, project scope development; provision of administrative management and/or management
assistance throughout construction; review and monitoring of construction schedules provided by
successful bidders; construction monitoring for adherence to the contract documents; review of
contractor's shop drawings and submittals; conducting warranty inspections of all construction based on
contract documents; as-built and record drawing document development and monitoring; pay
application review and approval; inspection and verification of stored materials; review of RFI's, RFP's,
FO's and change orders; review and management of punch list items; development and submission of
asset management reports; coordination of start-up, training, and commissioning; review and approval
of O&M manuals; and observation of construction to ensure contract compliance.
The consultant may be asked to provide immediate professional services in response to an emergent or
urgent need as requested by the County, on an as-needed basis when required. This effort may include,
but not be limited to, Conceptual Design; Basis of Design; Detailed Design; preparation of construction
contract documents suitable for bid conforming to applicable Federal or State regulations and Gwinnett
County ordinances; and bid phase services including bid advertisement, bidders' pre-qualifications,
response to questions from suppliers, manufacturers, and potential bidders, preparation of agenda and
meeting minutes, bid tabulation, and recommendation for award of contract and/or permitting.

RP016-26 Page 7
The consultant may provide services to assist the County in complying with Federal, State and/or local
environmental policies and environmental science issues. The consultant may provide miscellaneous
environmental services including, but not limited to, permit compliance submittals to Federal, State
and/or local regulatory agencies, project scope development, biological assessments including
modeling, water quality impact evaluations, wetland determinations, threatened and endangered species
assessments, cultural and archaeological assessments, land management, light and sound attenuation
reports, air quality monitoring and reporting, dredge and fill permitting and disposal, NPDES permitting,
stormwater pollution prevention plans, monitoring reports, mitigation design and mitigation construction
management, stream buffer and trout stream issues. Efforts could include data collection, impact
assessments, alternative evaluations, report preparation, agency coordination, wetland design, plans and
specifications, bidding support, environmental policy and planning documents, permit application
preparation and submittal, and public involvement.
Associated services may include review of reports, design and related work performed by others,
including, but not limited to, value engineering, bid ability, and constructability reviews.
The Consultant may be required to develop draft communications for customers, residents, the media
and other departments, working closely with the County. Services to be provided may include
participation in site visits and public meetings; providing draft press releases; development of
presentations; development of facility brochures; and writing articles for newsletters or developing award
applications.
The Consultant may perform evaluations of treatment processes, equipment and facilities, and may
provide engineering opinions regarding optimization and re-design of plant operations, equipment and
facilities. This includes services such as conducting water/water reclamation related research, BioWin
Model development, chemical and microbial analysis of water/wastewater quality, characterization,
treatability, and contaminant mitigation; water/ water reclamation facility process evaluations, including
new/innovative treatment techniques, efficacy studies, regulatory compliance, and permit validations;
sludge/residuals studies, including both water plant and water reclamation facility residuals; hydraulic
models of water treatment facilities, water reclamation treatment facilities and pump stations;
environmental hygiene studies; environmental safety investigations; chemical kinetics studies to
determine formation potentials of disinfection byproducts and other contaminants. Deliverables will
include written research reports, design recommendations and guidelines, Standard Operating Procedure
manuals, position statements, white papers, and statements of opinion concerning potential outcomes
of various actions. Results may be presented in the form of papers at technical conferences and
published in related technical journals.
Work may include presentation support, professional development and Gwinnett County employee
training and any additional services meeting the intent of this category. Work also may include any other
additional services not mentioned which could reasonably be expected to be provided under this Service
Category.
Types of Projects Expected:
* Water/Water Reclamation facility hydraulic modeling and analysis
* Water/Water Reclamation process unit operation performance evaluation, analysis and
optimization including: screening, grit removal, primary and secondary clarification, biological
processes, solids separation and handling, chemical feed systems, disinfection (UV, Ozone,
chemical), pump systems and process mechanical equipment evaluation (blowers, boilers,
pumps, fans)
* Regional pump station condition assessment, evaluation and rehabilitation

RP016-26 Page 8
* Pressure management initiatives for water distribution including pumping, storage and
system monitoring and control
B. Service Category B - Water Line, Sewer Line and Reuse Water Line Services
The Consultant shall provide design services as requested by the County to assess, improve, repair,
extend and modify the County sanitary sewer collection system, water distribution and transmission
system, reuse water line system, pumping and lift stations, and other components of the water, sanitary
sewer, and reuse water line systems.
This effort will include, but not be limited to, project scope development, review of records, research and
development of design criteria and investigation of materials, construction methods, and other necessary
functions related to the specific project; coordination of reports in written and graphic form; preparation
of Opinion of Probable Construction Cost (OPCC) using AACE Class 1, 2, 3, 4 standards ; Design
Development Services; Basis of Design reports; instrumentation and control design and support services;
preparation of a summary for the Basis of Design report; preparation of construction contract documents
suitable for bid conforming to applicable Federal or State regulations and Gwinnett County ordinances;
and bid phase services including bid advertisement, bidders pre-qualifications, response to questions
from suppliers, manufacturers, and potential bidders, preparation of agenda and meeting minutes, bid
tabulation, and recommendation for award of contract and permitting.
The Consultant will perform surveys as requested by the County in support of the design of water, sewer
and departmental facilities under this contract and as otherwise required for the operation of these
systems. These surveys may include cadastral surveys, topographical surveys, engineering surveys,
hydrographic surveys, boundary surveys, seismic refraction surveys, as-built surveys, surveys for
definition of easement areas - both existing and proposed, and construction surveys for line and grade
of proposed pipelines.
The Consultant may perform subsurface investigation and related tasks in obtaining applicable
underground utility information and data required under this service category. These include:
investigations to be performed throughout Gwinnett County on an as-needed and as-requested basis;
provide subsurface utility designating and reporting; provide all engineering services in identifying and
evaluating features and properties of unknown underground utilities and other subsurface facilities;
provide engineering report of findings; provide subsurface utility location coordination and reporting;
provide all engineering services in determining horizontal and vertical alignments of underground utilities;
and provide engineering report of findings.. Subsurface Utility Engineering (SUE) investigations are
limited to Quality Levels B, C, and D only as defined in CI/ASCE 38-02 Standard Guideline for the Collection
and Depiction of Existing Subsurface Utility Data.
Additional services provided may include, but are not limited to, professional opinions and filing survey
documents with the appropriate departments/agencies. Survey services shall be offered with billing rates
to address conventional services as well as survey grade versus mapping grade GPS services.
Construction management services will include, but not be limited to, project scope development,
provision of administrative management and/or management assistance throughout construction;
review and monitoring of construction schedules provided by successful bidders; construction
monitoring; review of contractor's shop drawings and submittals; conducting warranty inspections of all
construction based on approved specifications; as-built development and monitoring; pay application
review and approval; inspection and verification of stored materials; arrangement of groundbreaking
ceremonies; review of RFI's, RFP's, FO's and change orders; review and management of punchlist items;

RP016-26 Page 9
development and submission of asset management reports; coordination of start-up and training; review
and approval of O&M manuals; and observation of construction to ensure design compliance.
The Consultant may provide services to assist in complying with Federal, State and/or local
environmental policies and environmental science issues. The consultant may provide miscellaneous
environmental services including, but not limited to, project scope development, biological assessments,
water quality impact evaluations, wetland determinations, threatened and endangered species
assessments, cultural and archaeological assessments, land management, noise reports, air quality
reports, dredge and fill permitting, NPDES permitting, stormwater pollution prevention plans, monitoring
reports, mitigation design and mitigation construction management, stream buffer and trout stream
issues. Efforts could include data collection, impact assessments, alternative evaluations, report
preparation, agency coordination, wetland design, plans and specifications, bidding support,
environmental policy and planning documents, permit application preparation and submittal and public
involvement.
Associated services may include review of reports, design and related work performed by others,
including but not limited to, value engineering, bid ability, and constructability reviews.
The Consultant may be required to develop draft communications for customers, residents, the media
and other departments, working closely with the County. Services to be provided may include
participation in site visits and public meetings; providing draft press releases; development of
presentations; development of facility brochures; and writing articles for newsletters or developing award
applications.
Work may include presentation support, professional development and Gwinnett County employee
training and any additional services meeting the intent of this category. Work also may include any other
services not mentioned which could reasonably be expected to be provided under this Service Category.
Types of Projects Expected:
* Gravity Sanitary Sewer Collection Mains and Interceptors
* Sanitary Sewer Force Mains
* Potable Water Distribution and Service Mains
* Potable Water Transmission Mains
* Pressure Zone Enhancements
* Utility Coordination with State and County DOT Projects
C. Service Category C - Watershed and Stormwater Infrastructure Services
The consultant shall provide professional services for the implementation of stormwater infrastructure
and/or watershed improvements projects.
1. Watershed Improvement Program
The consultant will provide services as requested by the County to implement the County's Watershed
Improvement Program. Tasks performed within this category fall into two major categories: Project
Implementation and Programmatic include, but not be limited to project identification and
prioritization, hydraulic and hydrologic modeling, conceptual planning, survey including utility
location, detailed design, permitting, preparation of bid documents bid phase support and
construction management and administration support. , and inspections. These tasks will be
performed on watershed improvement projects to include green infrastructure and other stormwater
BMPs, stream restoration/rehabilitation employing natural channel design techniques, wetland

RP016-26 Page 10
restoration/rehabilitation, stormwater infrastructure, and mitigation banks. Monitoring services are
also included in this category, comprised of biological assessments (fish, macroinvertebrate, habitat,
etc.), erosion assessment, water quality sampling and Best Management Practices (BMPs)
performance determination. Additional services provided may include, but are not limited to, public
education and outreach support, landscape and planting plans, operations and maintenance plans
and training, watershed studies, dashboard development, professional opinions, plan review, bid
phase services, value engineering and constructability reviews.
2. Stormwater Conveyance System
The consultant may provide design services as requested by the County to repair and/or modify the
County's network of drainage pipes and other conveyances. These services could include, but are not
limited to, project scope development, culvert design, piped drainage system design, survey,
stormwater Best Management Practices (BMP) design, open channel design, , permitting, hydrologic
and hydraulic analysis, no-rise certifications, Federal Emergency Management Agency (FEMA) map
revision submittal and approval, cost estimation, construction document preparation, preparation of
bid documents, bid phase support and construction management and administration support..
Additional services provided may include, but are not limited to, utility coordination, traffic control
plans, professional opinions, plan review, value engineering, and constructability reviews.
This category will also be utilized to maintain, update and refine the County's stormwater
infrastructure (SWMM) and floodplain (HEC-RAS) models as needed. This may include, but is not
limited to, incorporating land use and infrastructure updates related to development and
redevelopment and design storm updates. Also included are maintenance and update of the GIS and
cost databases supporting the modeling and project scoping cost tool. This effort will include project
scope development, review of records, research, field work as required to update and add GIS
inventory, pipe level of service determination and development of system upgrade scenarios to meet
the desired level of service. Other tasks may include stormwater infrastructure master planning,
floodplain and floodway determination and analysis, predictive flood mapping, flood risk modeling,
hydrologic and hydraulic analysis, floodplain and floodway mapping, FEMA map revision submittal
and approval, flood study review, general support of Gwinnett County's flood study program,
dashboard development, professional opinions and cooperating with the legal department,
appraisers and other design consultants. Tasks assigned may also include monitoring culverts for
model validation/calibration, to include installation and maintenance of temporary monitoring
equipment as needed.
3. Regulatory Support
The consultant may provide MS4 Permit Program support. This could include public education and
outreach, administration support, monitoring, inspections, literature searches, illicit discharge
investigations, ordinance reviews, coordination with other internal/external workgroups for MS4
related activities, inspection and maintenance training, and other assistance in complying with MS4-
related environmental regulations and policies.
The consultant may aid reviewing as-built hydrology reports and as-built surveys for stormwater
BMPs, variances, and encroachments on an as needed basis to confirm stormwater infrastructure
and BMPs are constructed in conformance with the authorized design plans and hydrology study.
Variances will be reviewed to confirm that installation will not adversely impact the safe operation
and maintenance of the stormwater infrastructure.