Worcester Regional Airport CAT-III Instrument Landing System and Taxiway Project Environmental ...

185 Pages·2015·10.22 MB·English

by  Hoag, Deborah

Worcester Regional Airport
CAT-III Instrument Landing System and
Taxiway Project

Environmental Assessment

Prepared for
Massachusetts Port Authority
East Boston, Massachusetts

Prepared by
Watertown, Massachusetts

Boston, Massachusetts
March 2015
Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Final Environmental Assessment

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Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

Worcester Regional Airport
CAT-III Instrument Landing System and
Taxiway Project

This Environmental Assessment (EA) becomes a Federal document when evaluated,
signed, and dated by the Responsible FAA Official.

March 17, 2015
Responsible FAA Official Date
Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

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Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINSTRATION
FINDING OF NO SIGNIFICANT IMPACT

Category III ILS and Taxiway Improvements Project
Worcester Regional Airport
Proposed Action
The Massachusetts Port Authority (Massport) is the sponsor of the Worcester Regional Airport Category III
Instrument Landing System and Taxiway Improvement Project. The purpose of the project is to enhance aviation
safety and increase aeronautical access and the reliability of air service to the Worcester Regional Airport (ORH) during
the very low visibility weather conditions that frequently occur due to the Airport’s unique location and elevation.
The proposed safety improvements include:
• Constructing a partial jug-handle taxiway at the Runway 11 end. The taxiway will be built on a new terrace
supported by a mechanically stabilized earth retaining wall.
• Upgrading the approach lighting system to a high intensity system with flashing lights (ALSF-2 system) by retaining
old towers and placing new towers at 100-foot intervals. Upgrading the approach lighting system also requires
installing buried electrical conduit and a new generator building.
• Relocating the glide slope antenna to meet Category III criteria on a new fill terrace retained by a mechanically
stabilized earth wall system.
Massport also proposes upgrading the localizers at both the Runway 11 and 29 ends and installing taxiway centerline
lighting. The project includes constructing a temporary haul road on airport property to provide short term construction
access.
Federal Actions include approval of revisions to the Airport Layout Plan and a Department of the Army Section 404
Permit (Massachusetts General Permit). Massport and FAA prepared an Environmental Assessment (EA) to assess the
proposed action. The proposed action will require permits under the Massachusetts Wetlands Protection Act and the
Massachusetts Endangered Species Act. The proposed action will require a Water Quality Certificate Variance (Section
401 of the Clean Water Act) for placement of fill in Outstanding Resource Waters (issued by the Mass DEP).
Alternatives Considered
The EA included a review of alternatives to the proposed action, including a No-Action Alternative.
The alternatives considered for the jug-handle taxiway included a full length taxiway, a partial taxiway, fill slopes, and
retaining walls. Alternative widths and offsets for the taxiway placement were considered. The proposed jug-handle
taxiway was chosen because it meets the project purpose and need, increases safety and reliability of operations, and
avoids all impacts to wetlands.
Alternatives to the approach lighting system included replacing the tower array with all new towers. The proposed action
will utilize existing tower structures and has been designed to minimize impacts to wetlands. Electrical duct bank
alternatives were evaluated to minimize impacts to natural resources and maximize reliability of service. These included
conduit buried in line with the towers as well as placing the conduit on an elevated structure along the tops of the towers.
The proposed action will place the conduit within the footprint of the existing ILS access road, and will minimize
impacts to wetlands while maintaining reliability of service. Impacts from the lighting system and conduit will be limited
to 227 sf of unavoidable impacts to wetlands.
i Finding of No Significant Impact
Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

The glide slope antenna and reflective surface will have approximately 3,295 sf of wetland impacts. The location of the
glide slope is fixed by FAA requirements and cannot be moved away from the wetlands to avoid these impacts.
Alternative designs included a fill slope and a retaining wall option. The proposed action includes the retaining wall to
minimize impacts to adjacent wetland resources.
Assessment and Mitigation
EA Section 4 Environmental Consequences and Section 5 Mitigation evaluated the environmental consequences of the
proposed action. Together with the proposed mitigation, all impacts to resource categories are anticipated to less than
significant, based on the significance thresholds defined in FAA Order 1050.1E. Other than during construction, no air
quality or noise impacts will occur since the proposed project will not increase airfield capacity.
The proposed action includes mitigation for unavoidable impacts to wetlands. The project will result in 3,522 sf
(0.08 acres) of unavoidable impacts to wetlands. Massport has committed to providing a minimum of 2 square feet of
wetland replacement for every square foot of impact within the Town of Leicester.
The proposed action will unavoidably alter areas that have been identified as habitat for state-listed grassland bird
species. Habitat replacement or enhancement at a ratio of 2:1 (replacement:loss) will be provided through on-site and
off-site measures. In accordance with NHESP’s comment letter (Appendix D of the EA), Massport will coordinate with
NHESP to develop a Conservation and Management Plan to mitigate impacts to this species.
All other impacts discussed in the EA are minor, construction related impacts that are temporary in nature. Massport
commits to follow appropriate construction management practices to minimize minor temporary construction-related
impacts.
Finding of No Significant Impact
I have carefully and thoroughly considered the facts contained in the EA. Based on that information, I find the proposed
Federal action is consistent with the existing national environmental policies and objectives of Section 101(a) of the
National Environmental Policy Act of 1969 (NEPA) and other applicable environmental requirements. I also find the
proposed federal action will not significantly affect the quality of the human environmental or include any condition
requiring consultation pursuant to Section 102(2)(C) of NEPA. As a result, FAA will not prepare an EIS for this action.
APPROVED:

______________________________ 3/17/15
Richard Doucette, Date
Environmental Program Manager, FAA New England Region

DISAPPROVED

_____________________________ _____________
Richard Doucette, Date
Environmental Program Manager, FAA New England Region
ii Finding of No Significant Impact
Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

Table of Contents
1 Introduction.................................................................................................................... 1-1
1.1 Project Description .............................................................................................. 1-1
1.2 Worcester Airport Overview .............................................................................. 1-2
1.3 Permits and Approvals ........................................................................................ 1-4
1.3.1 Permits and Approvals - Federal .......................................................... 1-4
1.3.2 Permits and Approvals - State............................................................... 1-7
1.4 Coordination ......................................................................................................... 1-8
1.5 Summary of Project Impacts and Mitigation Measures ................................. 1-9
2 Purpose and Need .......................................................................................................... 2-1
2.1 Project Purpose .................................................................................................... 2-1
2.2 Need for the Project ............................................................................................. 2-1
2.2.1 Safety ........................................................................................................ 2-1
2.2.2 Reliability ................................................................................................. 2-2
3 Alternatives .................................................................................................................... 3-1
3.1 Introduction .......................................................................................................... 3-1
3.2 Alternatives Analysis - Taxiway ....................................................................... 3-1
3.2.1 Locational and Full-Length Taxiway Alternatives ............................ 3-2
3.2.2 Partial Taxiway Alternatives ................................................................. 3-2
3.2.3 Jug-handle Taxiway Alternative (Proposed Action) ......................... 3-5
3.3 Alternatives Analysis – Cat III ILS .................................................................. 3-9
3.3.1 Approach Lighting System .................................................................... 3-9
3.3.2 Glide Slope Antenna............................................................................ 3-11
3.4 No-Action Alternative ...................................................................................... 3-15
3.5 Description of the Proposed Action .............................................................. 3-15
3.5.1 Jug-handle Parallel Taxiway .............................................................. 3-15
3.5.2 ILS and Navigational Aids ................................................................. 3-16
3.5.3 Construction Haul Road....................................................................... 3-20
4 Affected Environment and Environmental Consequences ......................................... 4-1
4.1 Introduction .......................................................................................................... 4-1
4.2 Project Location and Setting ................................................................................ 4-1
4.3 Air Quality ............................................................................................................. 4-5
4.3.1 ILS Installation Conformity Requirements .............................................. 4-6
4.3.2 Taxiway Construction Conformity Requirements ................................... 4-7
4.4 Noise ...................................................................................................................... 4-7
4.5 Fish, Wildlife and Plants ........................................................................................ 4-9
4.5.1 Affected Environment .............................................................................. 4-9
4.5.2 Environmental Consequences ................................................................ 4-11
4.5.3 Regulatory Compliance ....................................................................... 4-15
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Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

4.6 Historic and Archaeological Resources ......................................................... 4-16
4.6.1 Affected Environment .......................................................................... 4-16
4.6.2 Environmental Consequences ............................................................. 4-17
4.6.3 Regulatory Compliance ....................................................................... 4-17
4.7 Light Emissions and Visual Impacts .............................................................. 4-17
4.7.1 Affected Environment .......................................................................... 4-17
4.7.2 Environmental Consequences ............................................................. 4-18
4.8 Water Quality ..................................................................................................... 4-18
4.8.1 Affected Environment .......................................................................... 4-19
4.8.2 Environmental Consequences ............................................................. 4-26
4.8.3 Regulatory Compliance ....................................................................... 4-33
4.9 Wetlands and Floodplains ................................................................................ 4-35
4.9.1 Affected Environment .......................................................................... 4-35
4.9.2 Environmental Consequences ................................................................ 4-43
4.9.3 Regulatory Compliance ....................................................................... 4-48
4.10 Construction Impacts ........................................................................................ 4-52
4.10.1 Description of Construction ................................................................ 4-52
4.10.2 Air Quality ............................................................................................. 4-53
4.10.3 Construction Noise ............................................................................... 4-57
4.11 Cumulative Impacts........................................................................................... 4-66
4.12 Summary of Environmental Consequences ................................................... 4-66
5 Mitigation ....................................................................................................................... 5-1
5.1 Fish Wildlife and Plants ..................................................................................... 5-1
5.2 Natural Resources and Energy........................................................................... 5-1
5.3 Water Quality ....................................................................................................... 5-2
5.4 Wetlands and Waterways ................................................................................... 5-2
5.5 Construction Period ............................................................................................. 5-5
5.5.1 Air Quality ............................................................................................... 5-5
5.5.2 Noise ......................................................................................................... 5-6
5.5.3 Hazardous Materials and Solid Waste ................................................. 5-7
5.5.4 Water Quality .......................................................................................... 5-7
5.5.5 Transportation and Traffic ..................................................................... 5-8
5.5.6 Wetlands and Waterways ...................................................................... 5-9
6 Distribution List ............................................................................................................. 6-1
7 List of Preparers ............................................................................................................ 7-1
7.1 Massport ................................................................................................................ 7-1
7.2 VHB ....................................................................................................................... 7-1
7.3 Jacobs Engineering Group, Incorporated ......................................................... 7-1
7.4 Green Environmental .......................................................................................... 7-1
8 References ....................................................................................................................... 8-1
9 Acronyms ........................................................................................................................ 9-1

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Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

List of Tables
Table No. Description Page

Table 1-1: Permits and Approvals ............................................................................................. 7
Table 2-1: Usable Hours Percent of Time ................................................................................. 3
Table 4-1: Resource Category Applicability ............................................................................. 4
Table 4-2: Grassland Habitat ................................................................................................... 12
Table 4-3: Existing Drainage Area Characteristics .................................................................. 25
Table 4-4: Post Construction Drainage Area Characteristics ................................................... 30
Table 4-5: Peak Runoff Rates (cfs) .......................................................................................... 33
Table 4-6: Recharge Characteristics ........................................................................................ 34
Table 4-7: Project Area Wetlands ............................................................................................ 37
Table 4-8: Summary of Wetland Impacts ................................................................................ 47
Table 4-9: Estimated Construction Statistics ........................................................................... 53
Table 4-10: General Conformity de minimis Threshold .......................................................... 54
Table 4-11: Existing Pollutant Concentrations ........................................................................ 55
Table 4-12: Construction Period Air Quality Impacts ............................................................. 57
Table 4-13: Construction Equipment Reference Sound Levels, dB(A) ................................... 58
Table 4-14: Ambient Sound Levels, Leq, dB(A) ................................................................... 61
Table 4-15: On-Site Construction Activity Sound Levels, dB(A) ........................................... 63
Table 4-16: Off-Site Construction Activity TNM Model Sound Levels, dB(A) ..................... 65
Table 4-17 Summary of Environmental Consequences ........................................................... 67
Table 4-17 Summary of Environmental Consequences (Continued) ....................................... 68

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Worcester Regional Airport – CAT III Taxiway and ILS Improvements
Environmental Assessment

List of Figures
Figure No. Description Page

Figure 1-1 Airport Location ......................................................................................... 1-3
Figure 1-2 Airport Layout ............................................................................................ 1-5
Figure 1-3 Proposed Action ......................................................................................... 1-6
Figure 3-1 Full Length Taxiway Alternative ............................................................... 3-3
Figure 3-2 Partial Taxiway Alternative ....................................................................... 3-4
Figure 3-3 Jug-handle Taxiway Alternatives ............................................................... 3-7
Figure 3-4 Proposed Jug Handle Taxiway ................................................................... 3-8
Figure 3-5 Proposed Glide Slope Antenna ................................................................ 3-13
Figure 3-6 Proposed Stormwater System ................................................................... 3-17
Figure 4-1 Environmental Resources ........................................................................... 4-3
Figure 4-2 Grassland Impacts .................................................................................... 4-13
Figure 4-3 Existing Drainage Areas........................................................................... 4-23
Figure 4-4 Proposed Drainage Areas ......................................................................... 4-27
Figure 4-5A Existing Wetlands and Floodplains .......................................................... 4-39
Figure 4-5B Existing Wetlands and Floodplains .......................................................... 4-41
Figure 4-6 Wetland Impacts, Approach Light System ............................................... 4-45
Figure 4-7 Obstruction Removal Locations ............................................................... 4-49
Figure 4-8 Locations of Construction Noise Analysis ............................................... 4-60
Figure 5-1 Proposed Wetland Mitigation Location .............................................. 5-3

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