24.01.12 PSA Stolfus & AssociatesEXHIBIT B
On-Call Agreement for Professional Services
TASK ORDER 2.6
US6 Mobility Improvement Project: Final Design – Traffic Signal Option
This Task Order pertains to the On-Call Agreement by and between the Town of Avon
(“TOWN”), and Stolfus and Associates (“CONTRACTOR”), dated On-Call Contract Execution
of September 3, 2021 (“the Agreement”).
CONTRACTOR shall perform services as provided herein and in the Agreement. This Task
Order shall not be binding until it has been properly signed by both parties. Upon
execution, this Task Order shall supplement the Agreement as it pertains to the project
described below.
Project Description: Provide preliminary engineering and concept analysis for the US6
Multimodal Safety and Mobility Improvements project. The project received the CDOT
Revitalizing Main Street Grant to slow prevailing speed on US6 and potentially install 3
pedestrian crossings as shown on the project site below.
Project Site:
Proposed Tasks: See Attachment A.
1. Final Design Plans for a Traffic Signal, Sidewalks, and Median Islands.
Budget/Proposal: ___$249,500 ____________________________________
Schedule: __Final Deliverable - Oct 2024 Solicitation for Spring 2025 Construction __
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
This Task Order is as approved by Town Council on the 12th day of January, 2024.
Town of Avon
Recommended: ________________________________Public Works Director ____Date: ______________
Eva Wilson Title
Stolfus and Associates
Approved: ________________________________________President________________ Date: ______________
Elizabeth Stolfus Title
Town of Avon
Approved: _________________________________________Avon Town Mayor ____Date: ______________
Amy Phillips Title
Town of Avon
Attest: ______________________________________________Avon Town Clerk ____Date: ______________
Miguel Jauregui Casanueva Title
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
2/12/2024
2/12/2024
2/14/2024
2/15/2024
5690 DTC Boulevard, Suite 330W
Greenwood Village, CO 80111
phone:303-221-2330 • fax: 303-221-2331
www.stolfusandassociates.com
January 4, 2024
Eva Wilson, PE, PTOE, CFM
Public Works Director
Town of Avon
Ewilson@Avon.org
Dear Eva:
Please find below a proposed Scope of Services for Stolfus & Associates, Inc. (Stolfus) to conduct design for a
modified concept for the US 6 Mobility Improvement project. Improvements include the following:
US 6 and Stone Bridge Road – a traffic signal, sidewalk on the southwest quadrant of the intersection, a
relocation of the driveway on the northeast side of the intersection further east, and raised median, where
width on US 6 allows.
River Edge Crossing - a pedestrian crossing at the transit stop with raised median from approximate MP
169.45 to MP 169.93 (landscaping where width on US 6 allows)
Eaglebend Crossing – a pedestrian crossing at the transit stop with raised median from approximate MP
170.13 to MP 170.48 (landscaping where width on US 6 allows)
Mountain Stream Crossing – a pedestrian crossings at the transit stop with raised median from
approximate MP 170.86 to MP 170.96.
Pedestrians crossings will include a median refuge, ADA compliant sidewalk and curb ramp improvements to
provide connectivity from the bus stops to the crossing, pedestrian level lighting and potential for future RRFB
installation.
It is our understanding the project is funded through a Revitalizing Main Streets and MMOF grants administered
by CDOT and will follow the CDOT Local Agency process. In addition, the project is located on a US Highway, so
CDOT design standards will apply. Compliance with CDOT Local Agency process, CDOT standards, and
coordination with CDOT staff is included in the scope of services.
The scope of work includes a single DOR submittal, and PS&E documents for approval and CDOT Clearances,
and advertisement documents. The following services are not included in this scope of services: Conceptual
Design, Traffic Analysis, Geotechnical, Pavement Design, Structures, Environmental (to be completed by CDOT),
ROW acquisition, public involvement, additional SUE investigation. (SUE QL-B and QL-A investigation at Stone
Bridge from previous design will be utilized for the traffic signal design. Lighting design will include open trench
conduit so no further QL-B investigation is required at the other improvement locations).
SCOPE OF SERVICES
The anticipated scope of services and deliverables for this project include:
1.Survey and Existing ROW Verification for sections not previously surveyed
2. Design
a.Interim (90%) Design Plans and Specifications and drainage report for the traffic signal, raised
medians and pedestrian crossings
b.Conduct a DOR Review meeting with CDOT (virtual)
3. PS&E
a.PS&E documents for approval and clearances by CDOT
b. Ad Documents
Exhibit A
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
Eva Wilson, PE, PTOE, CFM
January 4, 2024
Page 2
ELEMENTS OF THE SCOPE OF SERVICES
A. PROJECT MANAGEMENT
Stolfus will review and process invoices and provide other project administration/ management services
(coordination and product review) throughout the duration of the project. Stolfus will be responsible for day-to-day
management and coordination of the work elements. Monthly schedule, budget and project status reports will be
included in the invoices.
Stolfus will create and maintain a project design schedule. The schedule will be updated as necessary during the
design process. Stolfus will notify the Town when tasks are falling behind schedule.
The following project team meetings are included in the scope of work:
Biweekly Town coordination meetings (1/2 hour) (virtual)
2 – Progress meeting with Town and CDOT staff (virtual)
1 – DOR plan review meeting (virtual)
Stolfus will assist the Town with coordinating and scheduling meetings with CDOT. Stolfus will be responsible
for preparing meeting exhibits and participating in the meetings. Meeting notes will be generated and distributed
to the meeting attendees by Stolfus.
C. ROADWAY AND TRAFFIC DESIGN
Based on the Town’s direction and CDOT’s feedback, the design criteria for the project will be updated to
incorporate a traffic signal at Stone Bridge and raised landscape medians and submitted for review and
concurrence. Intersection and stopping sight distance triangles will be developed for each access point to confirm
pedestrian crossing locations and available landscaping zones. Proposed horizontal layout of improvements with be
developed. Centerline horizontal control for US 6 will be developed. Separate horizontal alignments for each
section may be developed. Roadway profiles are not expected to be required. Proposed medians and curb and
gutter are expected to match existing grades on US 6 with patching identified as needed to ensure positive
drainage. Vertical point data for median and curb, gutter and sidewalk will be provided in the plans. Side slopes
are anticipated to be accomplished through maximum 4:1 slopes. It is assumed that pedestrian crossing layouts
at River Edge, Eaglebend and Mountain Stream will generally match the previous design with updates to lane
widths as commented on by CDOT at the previous FOR and extension of raised median as identified by the
Town. Median lengths and widths will be determined based on the existing pavement and lane and shoulder
widths required. No widening of US 6 is planned. At Stone Bridge, the pedestrian crossing will be located at the
signalized intersection with curb and gutter and sidewalk proposed on the southwest quadrant of the intersection
up to the next access to the west. Lane configurations on US 6 will be modified for the signalized configuration
and the access on the northeast quadrant will be relocated to the same location as the previous design to allow
for a left turn deceleration lane into the property. Curb ramps will be detailed according to ADA standards at all
pedestrian crossings. Design models will be prepared to provide limits of disturbance (toes of slope) and identify
right-of-way (ROW) needs for the project. ROW needs are expected on the northeast and southwest corners of
Stone Bridge and at the River Edge crossing for lighting and curb ramp construction. Guardrail design is not
anticipated.
A signing and striping plans will be developed. Consideration for future crosswalk markings and RRFB’s will be
incorporated into the design. Pedestrian crossing warning signage is expected at each pedestrian crossing.
Pavement marking and signing designs will be consistent with MUTCD, CDOT S-standards, and CDOT R3
preferences. No special signs are anticipated. Signing for the traffic signal will be included on the traffic signal
plans. Where possible, signs will be left in place or reset.
A traffic signal design at Stone Bridge will be prepared including signal poles, mast arm lengths, signal heads,
associated signing, pedestrian push buttons and heads, controller cabinet, detection, and signal controllers. No
interconnect is anticipated. Signal hardware such as poles, mast arms, and signal heads will be consistent with
CDOT standards. Overhead lighting will be incorporated on the signal poles. It is expected that all conduit will be
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
Eva Wilson, PE, PTOE, CFM
January 4, 2024
Page 3
open trenched due to geotechnical conditions in the area. Electric power source will be identified and coordinated
with the utility company.
Construction phasing and traffic control plans will not be developed, but phasing and traffic control needs will be
investigated and quantities will be tabulated. In addition, a construction schedule will be developed to inform
quantities and specifications.
D. DOR (90%) DESIGN PLANS
Stolfus will prepare project documentation including development of 90% DOR plans, project specifications and
an opinion of probable cost. A CDOT Form 463 (Design Data) will be prepared and submitted to CDOT. Stolfus
will provide QA/QC review for the project. We will also provide technical support throughout the project in an
advisory capacity. Our review efforts will confirm appropriateness of methodologies used, accuracy of documents,
reasonableness of conclusions, document completeness, and overall clarity.
The 90% DOR Submittal will include:
- Title Sheet, Standard Plans List, General Notes, Tabulations, Typical Sections, Survey Control Diagram,
Geometric Control Plans, Removal Plans, Roadway Plans, Roadway Details, Traffic Signal Plans and
Notes, Signing and Striping Plans, Traffic Control Tabulation, Utility Plans, Drainage Plans and Profiles,
Lighting Plans, SWMP, Landscaping and Irrigation Plans, and cross-sections.
PS&E DOCUMENTS
The final design will incorporate comments from the FOR and consist of final plans, specifications, and engineer’s
opinion of probable cost. General conditions are excluded from this scope of work. The PS&E plan package will
be submitted to in electronic (PDF) format to the Town and CDOT for clearances. Minor updates will be made for the
advertisement set, as necessary, for the Town to reproduce for advertisement.
E. TOWN OF AVON AND CDOT PLAN REVIEW
Stolfus will submit plans to the Town and CDOT for formal review at 90% completion level. Reviews are assumed
to be approximately three (3) weeks unless otherwise negotiated by the Town. A formal DOR meeting will be
held with the Town and CDOT to review the plans. Comments will be summarized and a response matrix will be
prepared.
F. DESIGN STANDARDS
Drawings and designs will be in accordance with the Section 7.32 Engineering Improvement Standards of the
Town’s Municipal Code, CDOT Roadway Design Guide, MUTCD, CDOT M&S Standards, CDOT Standard
Specification for Road and Bridge Construction and other standards incorporated by reference.
G. FIELD SURVEY AND ROW
As subconsultant to Stolfus, Farnsworth will provide additional topographic survey, existing ROW and utility
locates for five additional areas along US 6 for median design. They will also prepare one additional permanent
easement with abbreviated ROW plans for CDOT that will accompany the previous easement definitions prepared
for the previous design of the project. Refer to attached Farnsworth scope for details. This contract will cover the
ROW Plans and Exhibits Task. All other work elements will be covered under the previous contract.
H. UTILITY COORDINATION
Stolfus will provide overall utility coordination/management for the project. Stolfus will review SUE plans and utility
locates with the updated designs and evaluate proposed design with existing utilities to identify impacts. Stolfus
will work with the hydraulics engineer to develop a utility conflict matrix. Stolfus will also develop utility plans to
accompany the utility conflict matrix that will identify conflicts, relocations, and responsible parties and will be
incorporated into the plan set. Stolfus will hold up to 2 Utility Coordination Meetings with the Town, CDOT and
affected utility companies to review impacts and relocations (one virtual and one in-person meeting). The in-
person meeting will be scheduled such that only one day is required to meet with all utility owners. Additional one-
on-one contacts via phone and email will be provided to coordinate relocation plans, estimates and agreements.
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
Eva Wilson, PE, PTOE, CFM
January 4, 2024
Page 4
Stolfus will work with the individual utility owners to develop utility agreements. Stolfus will also complete the utility
specification that outlines the utility impacts and actions by the contractor and/or utility company.
I. DRAINAGE AND WATER QUALITY
RESPEC will reevalaute the drainage design and updated plans, the SWMP, hydraulic report, and quantities.
Comments previously provided will be accounted for and incorporated into the updated DOR submittal. PSPs and
non-standard details will be added if necessary.
The PS&E phase will build on the analysis from the DOR phase and address any new comments provided by
reviewers. The plans, SWMP, hydraulic report, PSPs will be finalized and prepared for bid.
Permanent water quality improvement features will be incorporated at Stone Bridge Road but it is assumed that
water quality for the pedestrian crossings will not be required. The Eagle River floodplain is a FEMA Zone AE
floodplain which flows parallel to US 6, but it is contained within the existing channel and the proposed project limits
are outside of the floodplain limits.
J. LIGHTING DESIGN
Clanton will provide lighting design for three (3) pedestrian crossings at River Edge, Eagle Bend, and Mountain
Stream. Lighting at Stone Bridge will be incorporated on the traffic signal poles. Design from the previous effort are
expected to remain the same with updates based on the FOR comments from the previous effort. The lighting
scope include the following:
90% DOR
Incorporate comments from previous Avon US6 Stone Bridge FOR, up to one (1) comment response
Final lighting design
o Final lighting layout
o Lighting details
Electrical design
o Panel schedules
o One-line diagrams
o Lighting Control Centers, including short circuit calculations and feeder sizing
o Circuiting and conduit, including voltage drop calculations and conduit sizing
o Electrical details
Utility Coordination
Specifications (CDOT format)
Tabulation of Approximate Quantities
Opinion of Probable Cost
100% Bid Set (PS&E)
Incorporate comments from DOR review, up to one (1) comment response
Final lighting design
Final electrical design
Final specification revisions (CDOT format)
Tabulation of Approximate Quantities
Opinion of Probable Cost
Up to two (2) submittals (PS&E and AD Set)
K. LANDSCAPING DESIGN
DHM will provide landscaping design assuming narrower medians will be paved and larger medians will be
landscaped using a combination of shrubs, perennials, boulders and trees where appropriate. DHM will
develop details of median edges, refuge space and materials. The scope includes the following tasks:
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE
Eva Wilson, PE, PTOE, CFM
January 4, 2024
Page 5
Task 1: Landscape Concept- DHM will develop a concept plan hand sketch for the medians illustrating plant
locations and materials. Plants would be selected to be resilient with high aesthetic quality for canopy, screening
and a strong curb appeal. Trees, shrubs, perennials and grasses need to thrive in available space with
consideration to water, heat, debris from roadways. This is intended to be a rough internal sketch for DHM and
Stolfus to review prior to beginning final construction plans. This plan is needed to complete CAD construction
plans in the most efficient way.
Deliverable Products:
• Conceptual hand drawn landscape plans for medians along Highway 6 including plant palette.
Task 2: Final Design- Following approval of the concept sketch plan, DHM will prepare Final Landscape and
Irrigation Plans. Plans will include proposed median edge treatment, plant material, mulch/ rock cover and
irrigation. We assume bubbler or drip irrigation within the medians. We assume there may be multiple irrigation
taps because of the distance between medians. It’s our understanding that plans would be completed at end of
December for review meeting in January. DHM will coordinate with Stolfus throughout design as needed. DHM
has included 16 hrs. for revision time based upon review comments.
Deliverable Products:
• Draft-Final Landscape Plans and Details (10-12 sheets at 20 scale)
• Draft-Final Irrigation Plans and Details (10-14 sheets at 20 scale)
• Stamped Bid documents- Landscape Plans and Details (10-12 sheets at 20 scale)
• Stamped Bid documents- Final Irrigation Plans and Details (10-14 sheets at 20 scale)
L. CONTRACT TIME
Stolfus will complete the scope of services within seven months from receipt of notice to proceed, excluding
CDOT review and approval for advertisement. Weather delays for survey could impact the schedule.
M. DESIGN SUPPORT DURING CONSTRUCTION & PUBLIC INVOLVEMENT
This scope of services excludes public involvement, advertisement services and design services during
construction.
DELIVERABLES
Deliverables expected for this project include meeting notes; topographic survey; ROW exhibit; design
calculations; DOR (90%) plans; drainage report, quantities and opinion of probable cost; comment response
matrix; and PS&E documents in electronic format.
FEE
Stolfus and its subconsultants will perform these engineering services for a total fee of $249,500. We appreciate
the opportunity to work with the Town of Avon and would be happy to answer any questions you have on this
Scope of Services.
Sincerely,
STOLFUS & ASSOCIATES, INC.
Michelle R Hansen, PE
Consulting Services Director
DocuSign Envelope ID: 891ADA70-B1AE-4C70-93D2-6F569840B8EE