8E - Robert St. Ditch - Approval of Design ProposalCITY OF ATLANTIC BEACH
CITY COMMISSION MEETING
STAFF REPORT
AGENDA ITEM II BE
MARCI r 10,2014
AGENDA ITEM: Robert Street Ditch -Approval of Design Proposal
SUBMITIED BY: Rick Carper, P.E ., Public Works Director ;(..i.-
DATE: January 31, 2014
STRATEG IC PLAN LINK: Stormwater Master Plan Projects
BACKGROUND: During Budget workshops for the current year, Staff was directed to
contact FOOT to ascertain if a cost sharing agreement was possib le for the desired bank
stab ilization project. Staff obtained a cost proposal for design of the project from
Hanson Professiona l Serv ices, one ofthe City's General Engineering Consultants (GEC).
Hanson was selected because they are also an FOOT GEC. After Staff rev i ew and
revision, the draft proposal was submitted to FOOT for review. FOOT has committed to
sharing costs for the proposed bank stabilization proj ect with Atlantic Beach paying for
Design and Permitting and FOOT paying actual construction costs. The attached scope
from Hanson Professional Services is for design and permitting services that will then be
constructed by FDOT . The fee proposed by Hanson for this work is $43,066.90, of which
approximately $14,000 is for sub consultant work effor ts (survey and geotechnica l
engineering).
RECOMMENDATION: That the Commission authorize Staff to direct Hanson to proceed with
design and permitting as discussed in the attached Scope Proposal.
BUDGET: The current budget contains $50,000 in Stormwater Account 001-5002-541-
6300 des i gnated for Robert Street Ditch Improvements.
ATIACHMENTS: 1. Roberts Street Ditch Scope of Services -Hanson
Exhibit "A"
SCOPE OF SERVICES
Robert Street Outfall
AGENDA ITEM# 8E
MARCH 10, 2014
SR AlA I Mayport Road from Robert Street to Dudley Street
Duval County
I. DESCRIPTION
The City of Atlantic Beach, hereinafter called the COAB, requires professional services for
the preparation of a complete set of construction documents for the ditch improvements
between Robert Street and Dudley Street in Duval County. The plans and specifications will
conform to the FDOT Standards and guidelines. It is the Consultant's responsibility to
utilize the very best engineering judgment and practices during prosecution of the work
commissioned under this contract.
The Consultant shall demonstrate good management practices while working on this project.
These include communication with the COAB, the FDOT and others as necessary;
documentation; and management of time and resources. The Consultant shall set up and
maintain a contract file throughout the design of the project.
II. BACKGROUND
The FDOT ditch work area is approximately 550 linear feet in length beginning at Robert
Street and terminating at Dudley Street. Within this area, there are a number of areas
exhibiting bank erosion and shoaling, which the COAB wishes to correct. The ditch
currently has vegetated embankments.
III. OBJECTIVES
The Consultant has been requested by the COAB to provide a complete set of construction
documents for the following ditch improvements:
• Stabilization and regarding of both banks and bottom of ditch from Robert Street to
Lewis Street and from Lewis Street to Dudley Street in an effort to recreate the
historical cross sectional area. Stabilization is proposed to be achieved through use of
a Geoweb Channel Protection System. This is a cell containment system with topsoil
in fill to stabilize the 1.5:1 embankments. Additional non-standard anchorage is
required at the crest of the slope due to limited right-of-way width.
• Complete and submit all required permit applications to The St. Johns River Water
Management District (SJRWMD) and the Army Corps of Engineers. No flow
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AGENDA ITEM# 8E
MARCH 10, 2014
analysis is included in this effort. It is anticipated that there will not be a need to
demonstrate to the SJR WMD that proposed improvements will not adversely affect
drainage conditions, both upstream and downstream ofthe project area and complies
with the COAB Master Stormwater Plan. The original construction plans will be
provided as evidence of this project falling under a maintenance dredge classification.
The permit application with the SJRWMD will be filed as a Notice General ERP
Permit.
• COAB Design Submittals to be at 30%, 60%, 100% and Final milestones.
IV. DELIVERABLES TO INCLUDE:
• Survey tasks will include Topographic Survey from Robert Street to Dutton Island
Road and establishing Right-of-Way lines and preparing Temporary Construction
Easements (TCE) as necessary from Robert Street to Dudley Street.
• A geotechnical exploration will be performed to provide subsurface data to evaluate
potential dredging conditions and erosion control measures. This effort will include 2
Standard Penetration Tests (SPT) for slope stability and 2 hand auger borings to
determine subsurface soil conditions. The geotechnical analysis will include
determination of native soil properties such as angle of internal friction, cohesion,
unit weight and angle of shearing resistance.
• Construction Plans will be prepared in accordance with COAB, FHW A and FDOT
Standards, policies, procedures, memorandums and directions from the Department's
Project Manager for the COAB and FDOT. Construction plan set will include:
o Cover Sheet
o Typical Section Sheet
o General Notes
o Project Layout
o Plan/Profile Sheets (to also reflect erosion control features)
o Miscellaneous Drainage Detail Sheets
o Cross Sections-Assumes@ 50' intervals
• Drainage Technical Memorandum
• Complete Project Specifications including the Geoweb Channel Protection System
• Preparation of quantities and Engineer Estimates
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