07/08-30
DANNY L. KOLHAGE
CLERK OF THE CIRCUIT COURT
DATE:
October 31, 2008
TO:
Peter Horton, Director
Airports
Pamela G. Ha~
Deputy Clerk (J
FROM:
At the October 15, 2008, Board of County Commissioner's meeting the Board granted
approval and authorized execution of Purchase/Service Order No. 07/08-30 between Monroe
County and URS for an Environmental Assessment, Phase 1 Aviation Noise Evaluation, for the
Florida Keys Marathon Airport.
Enclosed is a copy of the above-mentioned for your handling. Should you have any
questions, please do not hesitate to contact this office.
cc: County Attorney
Finance
File.!
PURCHASE / SERVICE ORDER
FOR
MONROE COUNTY
To:
URS
Purchase Service Order No. 07/08-30
Re: PSA Agreement - Dated: 1-1-02
Resolution
Project Name:
MTH EA PHASE I AVIATION NOISE EVALUATION
Description of Services:
(See Attached Scope of Services)
Multiple of Direct Salaries
Lump Sum X
Reimbursable Expense
Days to Complete
270
Fee this Service Order
$59.922.00
Payment for Services shall be in their entirety as per PSO.
Prepared by:
Milfo~
Date: 9- 2-d'
Date:
Recommended by:
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Accepted by:
Approved by:
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Date: October 15. 2008
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SCOPE OF SERVICES
2008 PRELIMINARY AVIATION NOISE EVALUATION
Florida Keys Marathon Airport
The Proposed Project will extend Runway 07-25 from its current length of 5,008
feet to 5,708 feet through the utilization of the existing 400-foot paved overrun
areas located beyond each end of the runway. In order to determine the effects
of the proposed runway extension at the Florida Keys Marathon Airport (MTH), a
preliminary noise analysis will be conducted. This noise analysis will determine if
the proposed project will require an Environmental Assessment, or if the action
will meet the requirements to be approved as a Categorical Exclusion, as noted
in Federal Aviation Administration Order 1050.1 E, Policies and Procedures for
Considering Environmental Impacts. The consultant will perform tasks
necessary to develop preliminary DNL noise exposure contours for the most
recent 12-months (or calendar year) and for two future years that are to be
determined, with and without the proposed runway extension. The consultant will
compare the No-Action DNL noise exposure contours to the Proposed Project
DNL noise exposure contours to determine if there will be a potential for
significant adverse noise impacts resulting from the Proposed Project.
Task 1
Collect Aircraft and Airport Operations Data
Aircraft and airport operations data will be collected for the most recent 12-
months, or calendar year, to develop an existing condition DNL noise exposure
contour map. Initial estimates of existing aircraft activity levels will be obtained
from the Federal Aviation Administration's (FAA) Terminal Area Forecast (TAF)
and FAA Form 5010 data, and validated by Marathon airport personnel. In
addition, fleet mix data will be further validated using data obtained from the
Flight Explorer@ flight data recording system. Additional data concerning the
operating environment at the Airport will be obtained from the ongoing Master
Plan Update and through consultation with Airport staff. Existing and future
airport layout information, consisting of runway endpoints and runway declared
distances, will be obtained from the draft Airport Layout Plan. Aircraft operational
data to be collected and analyzed will include the following:
· Fleet mix
· Number and type of operations
. Flight tracks usage
. Day/night usage
· Current noise abatement procedures
. Ground run-up and maintenance activities
· Runway end utilization
2008 Preliminary Noise Evaluation
Page 2 of 4
Task 2
Forecast of Future Aircraft and Airport Operations Data
This scope does not include development of an independent forecast by the
consultant. In addition, the Preliminary Noise Evaluation for MTH will assume
that the Proposed Project would not induce activity, materially alter the fleet mix,
or increase operations when compared to the No-Action Alternative. Future
operational levels for the to-be-determined (TBD) two future years will be
obtained from the State of Florida Department of Transportation's Florida
Aviation System Plan forecast of operations for MTH.
If this preliminary noise evaluation determines the necessity of preparing an
Environmental Assessment, a complete independent forecast will need to be
performed, with the additional possibility of having to change the future forecast
years.
Task 3
Develop GIS Database
The Geographic Information System (GIS) will be developed to delineate current
land use, population, housing, airport related easements, and airport
facilities/property. Field review will be accomplished, if needed, in order to verify
current land uses within the DNL noise exposure contours and in the vicinity of
the airport. The GIS will be used to quantify the potential impacts by comparing
the No-Action Alternative impacts for the TBD future year to the Proposed Project
impacts for the TBD future year, for each TBD future year. Comparison of
contours will be based on the cumulative area, expressed in acres, within each of
the contour intervals modeled.
Task 4
Generate DNL Noise Exposure Contours
Task 4.1
Develop Baseline DNL Noise Exposure Contours
Airport and aircraft operations data for the most recent 12-month period (or most
recent calendar year), prepared in Task 1 to represent the existing conditions,
will be complied and analyzed to determine the operational characteristics for the
average annual day. This information will be formatted for input into the FAA's
Integrated Noise Model (INM), Version 7. INM standard database aircraft
departure and approach profiles will be used to model existing aircraft operations
at MTH. Noise exposure contours will be generated using the DNL metric at
DNL 65, 70, and 75 dB levels.
Task 4.2
Develop Future Condition DNL Noise Exposure Contours
Airport and aircraft operations data, prepared in Task 2 to represent the two
future years, will be compiled and analyzed to determine the operational
characteristics for the average annual day. This information will be formatted for
input into the FAA's Integrated Noise Model (INM), Version 7. INM standard
2008 Preliminary Noise Evaluation
Page 3 of 4
database aircraft departure and approach profiles will be used to model future
condition aircraft operations at MTH. Noise exposure contours will be generated
at DNL 65, 70, and 75 dB. For each future year, a No-Action condition and the
Proposed Project will be modeled.
Task 4.3 Evaluate and Compare Impacts of DNL Noise Exposure
Contours
The DNL 65, 70, and 75 dB noise exposure contours, which were developed in
Tasks 4.1 and 4.2, will be superimposed over the GIS land use base map in
order to more accurately quantify noise exposure in terms of population,
households, and land use. Comparisons of the noise exposure estimates for
existing condition, future No-Action, and the Proposed Project will be provided in
tabular format. Graphics will also be provided to compare the No-Action and
Proposed project noise contours, superimposed over the base mapping and land
use.
In addition, DNL noise exposure difference contours will be developed to
determine if any noise-sensitive areas located within the DNL 65 dB and greater
noise contour experience an increase in DNL noise exposure of 1.5 dB or
greater. This increase has been determined, by the FAA, to represent a
significant impact requiring additional analysis and/or mitigation.
Task 5
Document Preparation
The Preliminary Aviation Noise Evaluation document will be prepared to describe
the existing and future condition aircraft operations, and the operational
conditions used to complete the noise modeling. Graphics will be provided for
the existing condition DNL noise exposure contours, and to compare the No-
Action and Proposed Project noise exposure contours, superimposed over the
base mapping and land use. Comparisons of the noise exposure estimates for
the existing conditions, future No-Action and Proposed Project will be provided in
tabular format.
This document will include a recommendation as to whether a Categorical
Exclusion is an appropriate course of action or if an Environmental Assessment
should be prepared.
Task 5.1
Airport Review Document (Version 1)
Version 1 of the Preliminary Aviation Noise Evaluation document will be prepared
and submitted to the airport staff for review and comment. Five (5) copies will be
prepared - two (2) for the airport staff and three (3) for the consultant. Exhibits
within the document will be provided in color as appropriate.
2008 Preliminary Noise Evaluation
Page 4 of 4
Task 5.2
Final Document (Version 2)
Version 2 of the Preliminary Aviation Noise Evaluation document will incorporate
the airport staffs comments and will be the final document prepared and
submitted to the airport staff for their use and distribution to the FAA. Fifteen
copies will be prepared (five (5) each for the airport staff, the FAA, and the
consultant). Exhibits within the document will be provided in color as
appropriate.
The consultant will conduct a conference call with County and FAA personnel to
discuss the findings and recommendations of this preliminary noise evaluation.
Task 6
Project Management
This task involves the coordination and management of the non-technical
aspects of the project.
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