LOCATION HYDRAULIC REPORT - SWFL Roads 41...Draft LOCATION HYDRAULIC REPORT Florida Department of Transportation District One US 41 at Fruitville Road (CR 780) Intersection Improvements

Draft

LOCATION HYDRAULIC REPORT

Florida Department of Transportation

District One

US 41 at Fruitville Road (CR 780) Intersection Improvements -

PD&E STUDY

Sarasota County, Florida

Financial Project ID No.: 439025-1-22-01

ETDM No.:

The environmental review, consultation, and other actions required by applicable federal

environmental laws for this project are being, or have been, carried out by FDOT pursuant

to 23 U.S.C. §327 and a Memorandum of Understanding dated December 14, 2016 and

executed by FHWA and FDOT.

Prepared by:

Parsons Transportation Group, Inc.

201 East Pine Street

Orlando, FL 32801

August 2017

DRAFT | PRELIMINARY ENGINEERING REPORT

US 41 at Fruitville Road Intersection Improvement PD&E StudyPage i

Parsons Transportation Group Inc. Draft Location Hydraulic Report

Professional Engineer Certificate

I hereby certify that I am a registered professional engineer in the State of Florida practicing with

Parsons Transportation Group, Inc., a corporation authorized to operate as an engineering business,

Certificate of Authorization No. 1838, by the State of Florida, Department of Professional

Regulation, and Board of Professional Engineers. I have reviewed or approved the evaluation,

findings, opinions and conclusions as reported in this Location Hydraulic Report.

The Final Location Hydraulic Report includes a summary of data collection efforts and

assessments for US 41 at Fruitville Road Intersection Improvement PD&E Study. I acknowledge

that the procedures and references used to develop the results contained in this report are standard

to the professional practice of civil engineering as applied through design standards and criteria

set forth by the federal, state, and local regulatory agencies as well as professional judgment and

experience.

Parsons Transportation Group, Inc.

201 East Pine Street, Suite 900

Orlando, Florida 32801

Phone: 407.702.6869

Fax: 407.702.6950

Signature:

Name: Murray B. Santoro, P. E.

P.E. Number: 66065

Date: August 27, 2017

DRAFT | PRELIMINARY ENGINEERING REPORT

US 41 at Fruitville Road Intersection Improvement PD&E StudyPage ii


TABLE OF CONTENTS

PAGE

EXECUTIVE SUMMARY 1

SECTION 1 - PROJECT DESCRIPTION 2

1.1 Project Description 2

1.2 Corridor Description 3

1.3 Purpose and Need 3

1.4 Alternatives Considered 4

1.5 No-Build Alternative 4

1.6 Build Alternatives 4

1.6.1 Traffic Signal Improvement Alternative 4

1.6.2 2-Lane Roundabout Alternative (Interim) 4

1.6.3 Partial 3-Lane Roundabout Alternative (Ultimate) 4

SECTION 2 – FLOOD PLAINS & FLOODING 5

SECTION 3 – CONCLUSIONS 6

APPENDICES

Appendix 1 – FEMA MAP


DRAFT | PRELIMINARY ENGINEERING REPORT US 41 at Fruitville Road Intersection Improvement PD&E Study Page 1

EXECUTIVE SUMMARY



SECTION 1 - PROJECT DESCRIPTION

1.1 Project Description

The Florida Department of Transportation (FDOT) is conducting a Project Development and Environment

(PD&E) Study to evaluate intersection and multimodal improvements to US 41 at Fruitville Road (CR

780). The limits of the project extend along US 41 from 1st Street through the intersection to 5th Street.

The proposed improvements include replacing the existing intersection and drainage structures with the

development of an interim 2-lane and an ultimate partial 3-lane roundabout with an appropriate stormwater

collection and conveyance system. The project is located at the US 41 and Fruitville Road intersection in

Sections 19, 24, Township 36 South, and Ranges 17, 18 East, Sarasota County, Florida.

Figure 1-1 | Project Location Map



1.2 Corridor Description

US 41 is considered a major north-south transportation corridor that connects the cities of Bradenton,

Sarasota, and Manatee and Sarasota Counties, within the limits of this project. US 41 is also designated

as a primary hurricane evacuation route, a Florida Scenic Highway and a Multimodal Emphasis Corridor

(MMEC). US 41 is primarily a four-lane un-divided major arterial roadway south of Fruitville Road save

approximately 50 feet north of 1st Street where the existing 8-foot-wide median ends. US 41 is primarily

a five-lane undivided major arterial roadway north of Fruitville Road.

1.3 Purpose and Need

Currently, US 41 is a major roadway with high traffic volumes that will not adequately handle the existing

and future traffic demands of this growing area without roadway capacity improvements. In addition, US

41 acts as a barrier for residents and visitors between Downtown and the Sarasota Bay waterfront. For this

study, the Department is evaluating improvements to the intersection at US 41 and Fruitville Road that

would accommodate all modes of travel and provide for a better integrated multi-model transportation

system.

The purpose of this project is to conduct a feasibility analysis for roadway and intersection alternatives to

be analyzed and documented in the PD&E Study that minimize impacts to the natural, social, economic,

cultural and physical environment. Alternatives considered include: 1) a No-Build Option, 2)

modifications to the existing signal, 3) a 2-lane roundabout and 4) a partial 3-lane roundabout

configuration. Furthermore, the analysis will also include multimodal enhancements such as bicycle

accommodations on a minimum 10-foot wide shared used path located on the west side of US 41 and a

concrete sidewalk on the east side. This project is one of several projects along US 41, identified within

the City of Sarasota Downtown-Bayfront Connection study, with the overall goal of improving

connectivity between the Bayfront and downtown Sarasota with an emphasis on pedestrian comfort and

speed control.



1.4 Alternatives Considered

Four Alternatives were developed and considered during the preliminary engineering phase of this

study. A No-Build Alternative and three build Alternatives, a brief description of each are described

below.

1.5 No-Build Alternative

No improvements are made to US 41 within the limits of the study.

1.6 Build Alternatives

Each of the three “build alternatives” include a 10’ (minimum) wide shared-use path on the southbound

(west side) of US 41 and connections through the intersection to the existing bike lanes on Fruitville

Road, a 5’-6’ width sidewalk on the northbound roadway (east side) and stormwater runoff collection

and conveyance systems.

1.6.1 Traffic Signal Improvement Alternative

Reconstruct the existing Traffic Signal to accommodate additional turn lanes for the NB, SB and WB

directions. This alternate closely matches the existing intersection profile with insignificant impacts to

the surrounding ground elevations. It would also include the expansion of the existing closed drainage

system to accommodate the additional turn lanes.

1.6.2 2-Lane Roundabout Alternative (Interim)

This alternative increases the functionality of the intersection by replacing the existing intersection with

a 2-lane roundabout. This intersection improvement alternative will actually decrease the total amount

of impervious area; however, the design will require the roadway profile to be 1-2 feet above the existing

grade. This alternative will include additional drainage structures for the collection and conveyance of

stormwater runoff from the 2-lane roundabout into the existing drainage system.

1.6.3 Partial 3-Lane Roundabout Alternative (Ultimate)

This alternative increases the functionality of the intersection by replacing the existing intersection with

a Partial 3-lane roundabout. This intersection improvement alternative will decrease the total amount of

impervious area; however, the design will require the roadway profile to be 1-2 feet above the existing

grade. This alternative will include additional drainage structures for the collection and conveyance of

stormwater runoff from the 2-lane roundabout into the existing drainage system.



SECTION 2 – FLOOD PLAINS & FLOODING

Floodplain areas were identified within the study are using the Federal Emergency Management

Agency (FEMA) Flood Insurance Rate Map (FIRM). The FIRM map number is 12115C0133F for

Sarasota County, Florida with an effective date of November 4, 2016. The existing intersection

improvements are located entirely within the Sarasota Bay Coastal Watershed, designated as Zone AE

with a 100-year base flood stage elevation of 10.0’ (please refer to the FEMA Map in Appendix 1).

Minimal floodplain encroachment is anticipated with the proposed US 41 and Fruitville Road

improvements. It is anticipated that the only impact to the existing Sarasota Bay Watershed coastal

flood zone is the fill associated with the change in the roadway profile grade related to the proposed

intersection roundabout. The net encroachment into the flood plain should not adversely affect the

conveyance, storage, water quality or adjacent lands.

The project is located within the Sarasota Bay Watershed coastal flood zone; therefore, floodplain

compensation is not required.

In accordance with t h e 2 0 1 7 FDOT’s PD&E Manual, Part 2, Chapter 13, Floodplain

Statements, the corridor has been evaluated to determine the impact of the proposed hydraulic

modifications and estimated floodplain impact. The Recommended Alternative can best be

described as – “Minimal Encroachments”.

Minimal Encroachments - Minimal encroachments on a floodplain occur when there is floodplain

involvement but the impacts on human life, transportation facilities, and natural and beneficial

floodplain values are not significant and can be resolved with minimal efforts. Normally, these minimal

efforts to address the impacts will consist of applying FDOT’s drainage design standards and following

the WMD’s procedures to achieve results that will not increase or significantly change the flood

elevations and/or limits.



SECTION 3 – CONCLUSIONS

The intersection improvements recommended build option is feasible. The proposed project will reduce

the existing amount of impervious area, therefore reducing stormwater runoff. In addition, the

improvements should not encourage floodplain development due to the local (FEMA) floodplain and

SWFWMD regulations. The projects drainage design will be consistent with local County, FDOT and

SWFWMD design guidelines. Therefore, no significant changes in the areas base flood elevation within

the Sarasota Bay Watershed coastal flood zone should occur.

Based on the information collected during this study, the proposed improvement can be categorized as a

Type-5 project: Projects on existing alignment involving replacement of drainage structures in heavily

urbanized floodplains.

Replacement drainage structures for this project are limited to hydraulically equivalent structures. The

limitations to the hydraulic equivalency being proposed are basically due to restrictions imposed by the

geometrics of design, existing development, cost feasibility, or practicability. An alternative

encroachment location is not considered in this category since it defeats the project purpose or is

economically unfeasible. Since flooding conditions in the project area are inherent in the topography or

are a result of other outside contributing sources, and there is no practical alternative to totally eradicate

flood impacts or even reduce them in any significant amount, existing flooding will continue, but not be

increased.

The proposed structure will be hydraulically equivalent to or greater than the existing structure, and

backwater surface elevations are not expected to increase. Thus, the project will not affect existing flood

heights or floodplain limits. There will be no significant change in the potential for interruption or

termination of emergency service or emergency evacuation routes. Therefore, it has been determined that

this encroachment is not significant.

APPENDIX 1 FEMA Map

Documents

LOCATION HYDRAULIC REPORT - SWFL Roads 41...Draft LOCATION HYDRAULIC REPORT Florida Department of Transportation District One US 41 at Fruitville Road (CR 780) Intersection Improvements