WWYK263009_65 Design Analysis_Part1.pdf

MH+MH Joint Venture 1616 East 5th Street, Tulsa, OK 74120 The Mason & Hanger Group Inc. 300 West Vine Street, Suite 1500 Lexington, KY 40507 t 859.252.9980 f 859.253.0781 masonandhanger.com

Mead & Hunt Inc. 2440 Deming Way Madison, WI 53562 t 608.273.6380 f 608.273.6391 meadhunt.com

DESIGN ANALYSIS

65% DESIGN SUBMITTAL

Bomber Agile Common Hangar (BACH) Tinker AFB, Oklahoma

Date:

20 November 2024

Project Number:

WWYK263009

Prepared For:

USACE Tulsa District 2488 East 81st Street Tulsa, OK 74120-6008

U.S. Army Corps of

Engineers Tulsa District

Bomber Agile Common Hangar (BACH) Project No.: WWYK263009 Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 2

BOMBER AGILE COMMON HANGAR (BACH)

TINKER AIR FORCE BASE, OKLAHOMA

65% DESIGN SUBMITTAL

TABLE OF CONTENTS

Description Page

SECTION 0 - GENERAL 6

0.1 PURPOSE 6

0.2 AUTHORIZATION 6

0.3 PROJECT DESCRIPTION 6

0.4 GENERAL DESIGN GUIDANCE AND CRITERIA 7

SECTION 1 - DESIGN QUALITY CONTROL PLAN 13

1.1 DQCP 13

SECTION 2 - CIVIL 14

2.1 GENERAL PARAMETERS 14

2.2 DESIGN CRITERIA 14

2.3 CIVIL AIRFIELD – DESIGN ANALYSIS 14

2.4 CIVIL SITE - FUNCTIONAL AND TECHNICAL REQUIREMENTS 37

2.5 ENVIRONMENTAL 38

SECTION 3 - STRUCTURAL 40

3.1 GENERAL 40

3.2 DESIGN CRITERIA 40

3.3 LIST OF REFERENCES 40

3.4 DESIGN LOADS 40

3.5 MATERIALS OF CONSTRUCTION 42

3.6 ANTITERRORISM DESIGN CRITERIA 43

3.7 STRUCTURE DISCUSSION 43

SECTION 4 - ARCHITECTURAL 46

4.1 GENERAL PARAMETERS 46

4.2 DESIGN CRITERIA 49

4.3 CODE ANALYSIS 49

4.4 ACCESSIBILITY GUIDELINES 50

4.5 FUNCTIONAL REQUIREMENTS 50

4.6 DESIGN OBJECTIVES 51

4.7 GUTTER AND DOWNSPOUT CALCULATIONS 52

4.8 PLUMBING FIXTURE CALCULATIONS 61

4.9 DESIGN CALCULATIONS 63

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Design Analysis - 3

4.10 CONCLUSION 68

SECTION 5 - INTERIOR DESIGN 69

5.1 GENERAL PARAMETERS 69

5.2 DESIGN CRITERIA 69

5.3 INTERIOR DESIGN 69

5.4 CONCLUSION 72

SECTION 6 - MECHANICAL 73

6.1 DESIGN CRITERIA 73

6.2 DESIGN CONDITIONS 74

6.3 HVAC BUILDING DESCRIPTIONS 80

6.4 HVAC CONTROLS 84

6.5 SUSTAINABILITY 84

6.6 COMMISSIONING 84

6.7 PLUMBING 85

6.8 ENERGY MANAGEMENT SYSTEM 91

SECTION 7 - ELECTRICAL 92

7.1 DESIGN CRITERIA 92

7.2 EXTERIOR ELECTRICAL DISTRIBUTION 93

7.3 INTERIOR ELECTRICAL DISTRIBUTION 96

SECTION 8 - TELECOMMUNICATIONS 100

8.1 DESIGN CRITERIA 100

8.2 SITE TELECOMMUNICATIONS SERVICE 100

8.3 INTERIOR TELECOMMUNICATIONS DISTRIBUTION 101

8.4 CABLE TELEVISION (CATV) SERVICE 101

8.5 AUDIO VISUAL (AV) SERVICE 101

8.6 ELECTRONIC SECURITY SYSTEM (ESS) SERVICE 101

SECTION 9 - LIFE SAFETY - FIRE PROTECTION 102

9.1 GENERAL PARAMETERS 102

9.2 DESIGN CRITERIA 102

9.3 ANTI-TERRORISM AND FORCE PROTECTION (AT/FP) 103

9.4 BUILDING AND LIFE SAFETY CODE ANALYSIS 103

9.5 WATER SUPPLY FOR FIRE PROTECTION 103

9.6 FIRE SUPPRESSION SYSTEMS AND OTHER EXTINGUISHING

EQUIPMENT 104

9.7 MASS NOTIFICATION, FIRE ALARM DETECTION, REPORTING AND

COMMUNICATION 105

9.8 DRAFT CURTAINS 105

9.9 FIRE AND SMOKE DAMPERS 106

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Design Analysis - 4

9.10 INTERIOR FINISHES 106

9.11 ILLUMINATION OF MEANS OF EGRESS 106

9.12 EMERGENCY LIGHTING 106

9.13 MARKING MEANS OF EGRESS 106

9.14 ELEVATORS 106

9.15 ACCESSIBILITY REQUIREMENTS 106

SECTION 10 - ANTITERRORISM / FORCE PROTECTION 108

10.1 APPLICABLE CODES AND STANDARDS 108

10.2 PERIMETER AND ENTRANCES 108

10.3 MASS NOTIFICATION 108

10.4 ANTI-TERRORISM / FORCE PROTECTION 109

SECTION 11 - CYBERSECURITY 114

11.1 GENERAL 114

11.2 DESIGN CRITERIA 114

11.3 CONTROL SYSTEMS 114

SECTION 12 - ENERGY CONSERVATION 117

12.1 EXECUTIVE SUMMARY 117

12.2 APPLICABLE CODES AND STANDARDS 117

12.3 METHODOLOGY 117

12.4 LCCA BASE CASE DESIGN 118

12.5 ALTERNATIVES EVALUATED 119

12.6 RECOMMENDATIONS 121

SECTION 13 - SUSTAINABLE DESIGN 123

13.1 GENERAL 123

13.2 DESIGN CRITERIA 123

13.3 COMPLIANCE SUMMARY 124

13.4 THIRD-PARTY VALIDATION 125

13.5 GUIDING PRINCIPLES SUMMARY 125

13.6 EMPLOY INTEGRATED DESIGN PRINCIPLES 125

13.7 OPTIMIZE ENERGY PERFORMANCE 126

13.8 PROTECT AND CONSERVE WATER 127

13.9 ENHANCE INDOOR ENVIRONMENTAL QUALITY 128

13.10 REDUCE ENVIRONMENTAL IMPACT OF MATERIALS 129

13.11 ADDRESS CLIMATE CHANGE RISK 131

SECTION 14 - APPENDICES 132

14.1 DD FORM 1391 133

14.2 MEETING MINUTES 138

14.3 REQUESTS FOR INFORMATION RESPONSES 562

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14.4 TINKER AFB FACILITY STANDARD 724

14.5 CIVIL APPENDIX 837

14.6 STRUCTURAL APPENDIX 866

14.7 INTERIOR DESIGN APPENDIX 1575

14.8 QUALITY ASSURANCE APPENDIX 1758

14.9 SUSTAINABILITY APPENDIX 1797

14.10 ELECTRICAL APPENDIX 1860

14.11 MECHANICAL APPENDIX 1996

14.12 CYBERSECURITY APPENDIX 2608

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PART I - – GENERAL DESCRIPTION

SECTION 0 - GENERAL

0.1 PURPOSE

The purpose of this design analysis is to present the 35% redesign of the Bomber Agile Common Hangar (BACH) without the requirements of Executive Order 14057. The project is located east of South Douglas Boulevard at Tinker Air Force Base, Oklahoma.

This design analysis submittal presents only a narrative description of the redesigned project with respect to only those design disciplines that were affected. This DA is presented without calculations, outline specifications and other supporting data. This is as discussed with and agreed to by USACE and Tinker staff.

0.2 AUTHORIZATION

The project is being administered through the Tulsa District of the U.S. Army Corps of Engineers under a design contract with the Tulsa District of the Corps of Engineers. The scope of work is dated 7 August 2023. The contract number is W912BV20-D-0032, Task Order Number W912BV23F0177. It is authorized as a FY2026 project with a Project Number of WWYK263009 and DD Form 1391 dated 5 May 2023.

Complete construction plans are required.

The current DD 1391 provides a Programmed Amount (PA) of $282,000,000 which includes a 5.0% construction contingency and 6.5% for Corps of Engineer Supervision, Inspection and Administration. The contract Scope of Work requires that any construction cost estimate base bid that exceeds 80% of the PA have bid options.

0.3 PROJECT DESCRIPTION

The project shall construct an aircraft maintenance hangar for four (4) B-52 aircraft, with flexibility in the future to support the B-21. The facility will consist of a single-story structural steel framed hangar bay with interior steel columns and trusses on a cast-in-place concrete slab. Support spaces to include single-story back shops with a second story administration on one side constructed as a steel framed system, including restrooms and lockers, private offices, administrative space, breakroom and FEMA storm shelter, and hazardous material storage space. The hangar bay to be comprised of a standing seam metal roof with the support areas having a low slope single ply membrane roof. Special deep foundations consisting of piers and driven piles are required.

Supporting facilities to include all necessary utilities and connections, site demolition and earthwork, apron pavements, fencing, and site improvements

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 7 to provide a complete and usable facility. For reference and design information, this project shall utilize the information contained within the Bomber Campus Master Development Plan for the B-21 Campus Area for this facility and infrastructure, which includes the location of this facility.

The project will comply with DoD antiterrorism/force protection requirements per UFC 4-010-01 and High Performance and Sustainable Building Requirements per UFC 1-200-02. Comprehensive building and furnishings related interior design services are required. Access for individuals with disabilities will be provided. Cyber Security measures will be incorporated into this project.

The design of this project shall adhere to and abide by Executive Order (EO) 14057 ‘Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability.’ This EO states the directive for decarbonization and electrification of Federal facilities.

The site for the Bomber Agile Common Hangar (BACH) is to be located at Tinker Air Force Base, Oklahoma.

The sitework for the project will include additional parking lots and utilities.

Refer to Section 2 – Civil for additional information.

Electrical utility design will be coordinated with the utility provider by the M&H+M&H JV team. The construction contractor will install the electrical service entrance from pad mounted transformers to the service entrance equipment. The design and construction will be reviewed and coordinated with Oklahoma Gas and Electric (OG&E). Refer to Section 7 – Electrical, for additional information.

Domestic and fire water and sanitary sewerage for the facility will be provided by Oklahoma City Water Utilities Trust (OCWUT). Refer to Section 2 – Civil, for additional information on domestic water and sanitary sewer systems and to Section 9 – Life Safety - Fire Protection, for additional information on fire water systems.

Per the direction of Executive Order 14057 (see reference in table below), natural gas will not be provided to this facility. The design of this facility is all-electric.

The Executive Oder 14057 will not apply to this project as noted in Section

0.1. The AE was directed to redesign the facility to allow for natural gas.

0.4 GENERAL DESIGN GUIDANCE AND CRITERIA

EP 715-1-7 Architect-Engineer Contracting 22 May 2007 http://140.194.76.129/publications/eng-pamphlets/ep715-1-7/toc.htm

Contract Appendix A, date as noted above in paragraph ‘Authorization.’

DD Form 1391, for the project dated 5 May 2023.

According to the Jacobs PCR (Planning Charette Report), a SCIF in this http://140.194.76.129/publications/eng-pamphlets/ep715-1-7/toc.htm

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 8 facility is not required. However, at the design charrette, a SCIF element was appended to the program with the addition of the LO Storage, PMD, Server, Checkout, Secure Vestibule, and Man Trap. These spaces will be designed for compliance with current SCIF requirements but will not be accredited nor designated as such once construction of this project is completed. The intent is to provide provision(s) for the future B-21 mission requirements.

Reference Guidance Documents Name

Description

ALL DESIGN DISCIPLINES

10 CFR Part 436 10 CFR Part 436, Subpart A: Methodology and Procedures for Life-Cycle Cost Analysis

Executive Order 14057 Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability

DOD's ABA Accessibility Standards

ABA Accessibility Standard for Department of Defense Facilities 31 October 2008 https://www.access-board.gov/guidelines-and-standards/buildings-and-sites/about-the-aba-standards/aba-standards

AR 190-11 Physical Security of Arms, Ammunition, and Explosives 1/17/2019

ASCE 7-16 Minimum Design Loads and Associated Criteria for Buildings and Other Structures

ASHRAE 15

ASHRAE 55 Thermal Environmental Conditions for Human Occupancy 2020

ASHRAE 62.1 Ventilation and Acceptable Indoor Air Quality 2022

ASHRAE 90.1-2019 Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 189.1-2014 Standard for the Design of High-Performance Green Buildings

ASHRAE Handbook HVAC Systems and Equipment 2020

ASHRAE Handbook Fundamentals 2021

ASHRAE Handbook HVAC Applications 2023

BICSI TDMM 14TH edition Telecommunications Distribution Methods Manual

A/E/C CADD Standards https://tsc.wes.army.mil/products/standards/aec/AE https://tsc.wes.army.mil/products/standards/aec/AECR30Updates.asp

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Release CR30Updates.asp

DoDI 4170.11 Installation Energy Management, 31 August 2018

DoD Utilities Meter Policy 14 January 2021 2 - USA002541-20_TAB A_DoD Utilities Meter Policy as of 8 Jan 2021.pdf (osd.mil)

EPA CPG Program Comprehensive Procurement Guideline (CPG) Program Comprehensive Procurement Guideline (CPG) Program | US EPA

EPA Energy Star Program ENERGY STAR | The simple choice for energy efficiency.

EPA SNAP Program Significant New Alternatives Policy (SNAP) Program Significant New Alternatives Policy (SNAP) Program | US EPA

EPA WaterSense Program https://www.epa.gov/watersense

FEMA P-361 Safe Rooms for Tonadas and Hurricanes, Fourth Edition 2021

Federal Energy Management Program

Federal Energy Management Program (FEMP) Federal Energy Management Program | Department of Energy

IBC International Building Code, 2021 (as adopted by

UFC 1-200-01)

IC Tech Spec ICD/ICS 705 Version 1.5.1

Technical Specifications for Construction and Management of Sensitive Compartmented Information Facilities, 26 July 2021

ICC 500 Standard for the Design and Construction of Storm Shelters, 2014

ICC IMC International Mechanical Code, 2021

IEEE C2 National Electrical Safety Code (NESC), 2023

IES Lighting Handbook Illuminating Engineering Society - The Lighting Handbook, 10th Edition

IgCC International Green Construction Code, 2018

IPC International Plumbing Code, 2021

MII (M-CACES 2nd generation)

Updated version of Micro-Computer Aided Cost Estimating System (MCACES) second generation (MII). http://www.miisoftware.com/

NECA/FOA 301 Installing and Testing Fiber Optic Cables 2016

NECA 607 Standard for Telecommunications Bonding and Grounding Planning and Installation Methods for Commercial Buildings

NECA/BICSI 568 Installing Commercial Building Telecommunications Cabling

NFPA 10 Standard for Portable Fire Extinguishers, 2022 https://tsc.wes.army.mil/products/standards/aec/AECR30Updates.asp https://www.acq.osd.mil/eie/Downloads/IE/DoD%20Utilities%20Meter%20Policy%2014%20Jan%202021.pdf https://www.acq.osd.mil/eie/Downloads/IE/DoD%20Utilities%20Meter%20Policy%2014%20Jan%202021.pdf https://www.epa.gov/smm/comprehensive-procurement-guideline-cpg-program https://www.epa.gov/smm/comprehensive-procurement-guideline-cpg-program https://www.energystar.gov/ https://www.energystar.gov/ https://www.epa.gov/snap https://www.epa.gov/snap https://www.epa.gov/watersense https://www.energy.gov/femp/federal-energy-management-program https://www.energy.gov/femp/federal-energy-management-program http://www.miisoftware.com/

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NFPA 13 Standard for Installation of Sprinkler Systems, 2022

NFPA 24 Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2022

NFPA 70 National Electrical Code®, 2023

NFPA 70B Recommended Practice for Electrical Equipment Maintenance, 2023

NFPA 70E Standard for Electrical Safety in the Workplace, NFPA 72 National Fire Alarm and Signaling Code®, 2022

NFPA 90A Standard for the Installation of Air-Conditioning and Ventilating Systems 2024

NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems 2024

NFPA 101 Life Safety Code, 2024

NFPA 409 Standard on Aircraft Hangars, 2022

NFPA 780 Standard for the Installation of Lightning Protection System, 2023

NIST Handbook 135 NIST Handbook 135, Life-Cycle Costing Manual for the Federal Energy Management Program

PCASE Version 7.0.6, 27 September 2023

TI 800-01 Design Criteria, 20 July 1998

SMACNA Standard HVAC Duct Construction Standards, Metal and Flexible, 4th Edition

SMACNA Standard 016 HVAC Air Duct Leakage Manual 2012

SMACNA Guideline Roof Mounted Outdoor Air-Conditioner Installations

UFC (index)

Index of Unified Facilities Criteria (UFC), current listing.

http://www.wbdg.org/ccb/browse_cat.php?o=29&c=

UFC 1-200-01 w/ Chg 2 DoD Building Code, 01 September 2022, with Change 2, 12 June 2023

UFC 1-200-02 w/Chg 2 High Performance and Sustainable Building Requirements, 1 December 2020, with Change 2, 01 June 2022

UFC 2-100-01 Installation Master Planning

UFC 3-101-01 w/ Chg 3 Architecture, 16 December 2020, with Change 3, 2 October 2023

UFC 3-110-03 w/ Chg 5 Roofing, 1 May 2012, with Change 5, 12 June 2020

UFC 3-201-01 Civil Engineering, 20 December 2022

UFC 3-201-02 Landscape Architecture with Change 1, 09 http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4 http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

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February 2021

UFC 3-210-10 Low Impact Development, 28 August 2023

UFC 3-220-01 w/ Chg 3 Geotechnical Engineering, with Change 1, 3 November 2021

UFC 3-250-01 Pavement Design for Roads and Parking Areas, 14 November 2016

UFC 3-250-03 Standard Practice Manual for Flexible Pavements, 30 May 2018

UFC 3-250-04 w/ Chg 2 Standard Practice for Concrete Pavements, with Change 2, 29 July 2009

UFC 3-250-11 Soil Stabilization and Modification for Pavements, 30 November 2020

UFC 3-260-01 w/ Chg 1 Airfield and Heliport Planning and Design, with Change 1, 5 May 2020

UFC 3-260-02 Pavement Design for Airfields, 30 June 2001

UFC 3-260-04 Airfield and Heliport Marking, 16 May 2018

UFC 3-400-02 Design: Engineering Weather Data

UFC 3-410-01 Heating, Ventilation, and Air Conditioning Systems, with Change 8, 21 July 2021

UFC 3-410-02 Direct Digital Control for HVAC and Other Building Control Systems, Change 2, 12 Apr 2021

UFC 3-420-01 Plumbing Systems, 1 April 2021

UFC 3-420-02 Compressed Air, 8 November 2022

UFC 3-440-01 Facility-Scale Renewable Energy Systems, 1 July

UFC 3-450-01 Noise and Vibration Control 2022

UFC 3-490-06 w/ Chg 1 Elevators, 8 June 2018 with Change 1, 13 January

UFC 3-501-01 w/ Chg 1 Electrical Engineering, 6 October 2015 with Change 1, 01 November 2019

UFC 3-520-01 w/ Chg 2 Interior Electrical Systems, 6 October 2015 with Change 2, 12 April 2021

UFC 3-530-01 Interior and Exterior Lighting Systems, 09 February

UFC 3-535-01 w/ Chg 4 Visual Air Navigation Facilities, 11 April 2017 with Change 4, 25 April 2023

UFC 3-550-01 w/ Chg 3 Exterior Electrical Power Distribution, 1 September 2016 with Change 3, 01 November 2019

UFC 3-560-01 w/ Chg 3 Operation And Maintenance: Electrical Safety, 24 July 2017 with change 3, 15 May 2023

UFC 3-575-01 w/ Chg 1 Lightning and Static Electricity Protection Systems, Tinker Air Force Base, Oklahoma 65% Design Submittal

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01 July 2012 with change 1, 01 October 2021

UFC 3-580-01 w/ Chg 1 Telecommunications Interior Infrastructure Planning and Design

UFC 3-600-01 w/ Chg 6 Fire Protection Engineering for Facilities, 08 Aug 2016, with Change 6, 6 May 2021

UFC 3-740-05 Handbook: Construction Cost Estimating, 12 September 2022

UFC 4-010-01 w/ Chg 2 DoD Minimum Antiterrorism Standards for Buildings, 12 December 2018, with Change 2, 30 July 2022

UFC 4-010-05 SCIF/SAPF Planning, Design, and Construction, 26 May 2023

UFC 4-010-06 CyberSecurity of Facility-Related Control Systems 10 October 2023

UFC 4-021-01 w/ Chg 1 Design and O&M: Mass Notification Systems, 09 April 2008, including Change 1, January 2010

UFC 4-021-02 w/ Chg 1 Electronic Security Systems

UFC 4-022-03 Security Fences and Gates, 1 October 2013.

UFC 4-211-01 w/ Chg 3 Aircraft Maintenance Hangars, 13 April 2017, with Change 3, 20 April 2021

USACE ECB 2023-08 Electrification, Decarbonization, and Executive Order (E.O.) 14057., 22 June 2023

USDA BioPreferred Program BioPreferred

Southwest Division Architectural and Engineering Instructions Manual

(SWD-AEIM) January 2023 http://www.swd.usace.army.mil/capabilities/swdeng ineeringcriteria/index.htm (This manual is on-line only.)

72 ABW/SC COMM.RM-STANDARD V3.2

Tinker Air Force Base Facility Standard, 2023 Edition

See Appendix 14.16 https://www.biopreferred.gov/BioPreferred/

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Design Analysis - 13

PART II - – DESIGN REQUIREMENTS AND PROVISIONS

SECTION 1 - DESIGN QUALITY CONTROL PLAN

1.1 DQCP

The Design Quality Control Plan (DQCP) was developed earlier in the project as a stand-alone document. The DQCP is included as an appendix to the Design Analysis.

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Design Analysis - 14

SECTION 2 - CIVIL

2.1 GENERAL PARAMETERS

This project provides for the construction of a new Bomber Agile Common Hangar (ACH) and supporting facilities at Tinker Air Force Base (TAFB). The hangar is designed for depot maintenance activities necessary for B-52 modernization and B-21 activation. Supporting facilities required for the project include all necessary utilities and connections, site demolition and earthwork, apron pavements, fencing, and site improvements to provide a complete and useable facility.

2.2 DESIGN CRITERIA

Refer to separate Section GENERAL, Subsection "General Design Guidance and Criteria" located at the beginning of this Design Analysis narrative for general references.

PCASE Version 7.0.6, 27 September 2023

UFC 3-201-01 Civil Engineering, 20 December 2022

UFC 3-201-02 w/ Chg 1 Landscape Architecture with Change 1, 09 February 2021

UFC 3-210-10 Low Impact Development, 28 August 2023

UFC 3-220-01 w/ Chg 1 Geotechnical Engineering, with Change 1, 3 November 2021

UFC 3-250-01 Pavement Design for Roads and Parking Areas, 14 November 2016

UFC 3-250-03 Standard Practice for Flexible Pavements, 30 May 2018

UFC 3-250-04 w/ Chg 2 Standard Practice for Concrete Pavements, with Change 2, 29 July 2009

UFC 3-250-11 Soil Stabilization and Modification for Pavements, 30 November 2020

UFC 3-260-01 w/ Chg 1 Airfield and Heliport Planning and Design, with Change 1, 5 May 2020

UFC 3-260-02 Pavement Design for Airfields, 30 June 2001

UFC 3-260-04 Airfield and Heliport Marking, 16 May 2018

UFC 4-010-01 w/ Chg 2 DoD Minimum Antiterrorism Standards for Buildings, 12 December 2018, with Change 2, 30 July 2022

UFC 4-022-03 Security Fences and Gates, 1 October 2013.

2.3 CIVIL AIRFIELD – DESIGN ANALYSIS

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2.3.1 Introduction

Section 2.3 encompasses all the applicable requirements for an Airfield Pavements Design Analysis as outlined in Appendix B of UFC 3-260-02, Pavement Design for Airfields.

2.3.2 Site Description

2.3.2.1 Location

TAFB is situated within Oklahoma County and borders the suburban areas of the cities of Oklahoma City, Midwest City, and Del City. The primary aircraft operating at TAFB are the E-3, E-6B, and KC-135R. TAFB also hosts B-1B, KC-46A, and B-52H flying operations in support of Program Depot Maintenance. TAFB is the planned depot location for the B-21 Raider. There are two active runways at TAFB: primary Runway 18/36 is 11,100 feet long by 200 feet wide and crosswind Runway 13/31 is 10,000 feet long by 200 feet wide. Future airfield projects include the reconstruction of Runway 31 overrun to full-strength pavement and construction of a new taxiway from Runway 31 end to accommodate the future B-21 Raider maintenance depot at the Maintenance Repair Overhaul Technology Center (MROTC) site. TAFB is classified as a Class B Runway installation as its primarily intended for high-performance and large, heavy aircraft per Table 3-1 of UFC 3-260-01, Airfield and Heliport Planning and Design.

The proposed ACH is sited in the future B-21 bomber campus, located to the east of S Douglas Blvd and to the north of SE 59th Street. The western elevation of the ACH abuts the existing MROTC apron and extends east to land being acquired by TAFB. Aircraft access the proposed hangar site via an existing 45-foot wide towway that crosses S Douglas Blvd from the ALC Parking Apron, east of Runway 18/36. S Douglas Blvd is currently a public road that has gated access for the towway crossing. Future plans include the privatization of S Douglas Blvd and routing public traffic around the future B- 21 Bomber Campus.

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The extent of proposed construction includes full depth demolition of a northeast portion of MROTC apron to allow for siting of the proposed ACH footprint and to accommodate the required grade change from the existing apron to the finished floor elevation. The project includes construction of a new towway and shoulder north of the ACH to provide access to the east side of the hangar. Two hangar access aprons extend south from the northern towway to the east and west sides of the hangar to access the four hangar bays of the ACH. The existing 45-foot wide towway is to be widened 15-feet on each side to total 75-feet wide of PCC and includes the construction of 50-foot asphalt shoulders each side to accommodate the outrigger wheel on the B-52. Lastly, additional PCC pavement is provided to support Aerospace Ground Equipment (AGE) parking and a B-52 parking spot located outside the hangar to the southeast. The additional B-52 parking spot is also to be utilized for aircraft stand staging area. DD Form 1391 lists 39,052 square meters of apron pavement planned for this project however, the addition of 50-foot shoulders to the existing towway, additional AGE parking, and the additional B-52 parking spot outside the hangar was not included in the original 1391 quantities. These additional items were identified during the project charrette as either missing from the original project program or as new project requirements that need to be included in this design.

All aircraft accessing the ACH and future bomber campus are to be towed only. The geometrics of the airfield pavements shall be designed to accommodate up to a 185-foot wingspan with the required 25-foot wingtip clearance per wing in accordance with towway criteria from Table 5-6 of UFC 3-260-01. This design criteria locates the towway centerline a minimum distance of 118 feet from the ACH. Aircraft that have larger wingspans than 185-foot can still utilize the northern towway if towed at a distance of 136.5 feet from the ACH, or 11.5 feet north of the centerline shown in the project drawings. Utilizing an 11.5-foot offset centerline accommodates up to a C-5 aircraft. The offset centerline also still meets the required 5 feet of clearance from the edge of main gear to the pavement width of towway.

A coordinate location to site the northwest corner of the ACH was provided from Tinker Civil Engineering (X=-97.368207, Y= 35.410208), so that the facility will integrate with the siting of future B-21 campus facilities.

In general, the proposed towway design conforms or exceeds minimum dimensional requirements of a Class B runway as stated in UFC 3-260-01, Table 5-6, as follows:

• Minimum width of towway to be outside gear width of towed mission aircraft plus 10 feet (5 feet each side).

• Total width of shoulders (paved and unpaved) to be at least 25 feet.

• Longitudinal grade of towway and shoulders to be at a maximum 3.0 percent.

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• Rate of longitudinal grade is to be maximum 1.0 percent per 100 feet.

• Longitudinal Point of Intersections (PI) of vertical curves to be not less than 500 feet between successive PIs, with no two PIs having the same separation. Up to a 0.4 percent change of grade is allowed without a vertical curve.

• Transverse grades to be between the minimum of 2.0 percent to a maximum of 3.0 percent with slope pavement downward from centerline of towway.

• Towway turning radius to be 150-foot radius.

• Fillet radius at intersection to be 100-foot radius.

• A 1.5-inch drop-off at paved shoulders is to be provided from edge of paved shoulder to turfed surfaces to improve drainage off the paved surfaces.

• Shoulders are to have a minimum transverse slope of 2 percent, to a maximum of 4 percent.

• Horizontal clearance from towway centerline to fixed or mobile obstacles to be ½ the wingspan of the towed mission aircraft + 25 feet.

• Vertical clearance from towway pavement surface to fixed or mobile obstacles to be height of towed mission aircraft + 10 feet.

• Grade between towway shoulder and towway clearance line to be between the minimum of 2.0 percent prior to channelization to a maximum of 10.0 percent.

In general, the proposed hangar access apron design conforms to the requirements of a Class B runway as stated in UFC 3-260-01, Table 6-6, as follows:

• Minimum length of hangar access apron to exceed the apron clearance distance, see item 7 below.

• Total width of apron to be at least as wide as the hangar door width.

• Grades in direction of drainage to be a minimum of +/- 0.5 percent to a maximum of +/- 1.5 percent.

• Width of shoulders (total width including paved and unpaved) to be 25 feet.

• A 1.5-inch drop-off at paved shoulders is to be provided from edge of paved shoulder to turfed surfaces to improve drainage off the paved surfaces.

• Shoulders are to have a minimum transverse slope of 2 percent, to a maximum of 4 percent.

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 18

• Clearance from apron boundary marking to fixed or mobile obstacles to be ½ the wingspan of the towed mission aircraft + 25 feet.

• Grade between access apron shoulder and wingtip clearance line to be a maximum of 10.0 percent.

Existing conditions linework of the site to include pavements, buildings, utilities, etc., was compiled from the Guy Engineering topographic survey dated September 4, 2024, and available GIS database layers provided by Tinker AFB.

2.3.2.2 Topography/Drainage of Site

The existing MROTC site is relatively flat with grades sloping towards the northeast. There is minimal existing storm drainage infrastructure other than several 24-inch and 30-inch culverts crossing under S Douglas Blvd, the existing towway, and under the installation perimeter fence. Runoff flows to grassy swales or larger drainage ditches within the site before discharging offsite to Soldier Creek. The ditches to the north of the MROTC Apron falls within the 100-year Federal Emergency Management Agency (FEMA) floodplain. The floodplain is considered a special flood hazard area, Zone A, per FEMA Map Number 40109C0340H. A base flood elevation has yet to be determined in Zone A. Storm drainage design and hydraulic modeling will comply with local, state, and federal requirements to address floodplain impacts.

The topographic survey to include all existing contours data within the drawing set was conducted by Guy Engineering, dated September 4, 2024.

The existing MROTC apron and towway appear to contain a drainage layer as underdrain cleanouts and as-builts indicate an underdrain system, however no borings or Airfield Pavement Evaluation Reports indicate a drainage layer is present. According to current pavement design criteria contained in UFC 3-260-02 “Pavement Designs for Airfields,” along with UFC 3-250-01, “Pavement Design for Roads and Parking Areas” and TSPWG M 3- 260-02, 11-4 “Airfield Pavement Drainage Layers,” a drainage layer is to be incorporated into all new designs unless the infiltration rate of the underlying soils is greater than 20 feet per day and in a non-frost area.

2.3.2.3 Climate

TAFB’s climate is officially classified by the United States Department of Agriculture (USDA) as a warm subhumid with pronounced day-to-day changes and gradual seasonal changes, although the changes of season weather are very dramatic. Oklahoma City’s weather conditions are characterized by hot summers, cold, often snowy winters, and thunderstorms in the spring. Temperatures can fall below 0 F in the winter and reach above 100 F in the summer. On average, the warmest month is July, January is the coolest month, and the maximum average precipitation occurs in May. The

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 19 average amount of measurable precipitation is almost entirely offset by evapotranspiration. Winds on the average are from 12-14 mph and predomination direction is from the south – southeast.

CLIMATE DATA FOR TINKER AFB, OKLAHOMA

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Record high

°F

80 85) 91 98 104 106 10

107 107 98 84 85 109

Average high °F

46 52 60 71 78 87 92 92 84 74 60 50 70.5

Average low

°F

27 32 39 51 59 68 72 71 64 53 40 31 50.6

Record low

°F

−7 −1 -1 25 35 51 53 56 37 26 11 0 −7

Precipitation inches

1.3 1.3 2.3 3.1 6.1 4.1 3.3 2.3 3.3 2.9 1.9 1.4 33.3

Avg. rainy days

5 6 7 7 9 8 6 6 7 6 5 5 77

Source #1: 2020 Tinker INRMP Source #2: Weatherbase.com (Midwest City) 4]

2.3.2.4 Vegetation

Much of the ACH project site has been previously developed as part of the original 2006 MROTC construction. Trees will be impacted in the land to be acquired, east of MROTC. The detention basin is optimally sited to limit impact to trees and to utilize existing topography. Tree mitigation is required for any tree removal. Any trees requiring removal will need to be done within the tree cutting season, typically August 1 through March 31st due to migrating bats and birds.

2.3.2.5 Geology

Per the 2020 Tinker INRMP, early aerial photographs indicate the majority of land currently occupied by TAFB was used for agricultural purposes. Soil was borrowed from various on-base locations to build up facility foundations and level the airfield. Borrow is evident in the construction of the MROTC during 2006. The MROTC site’s soil is primarily comprised of Renthin-Grainola- Peidmont (CL), which is a deep and moderately deep, well-drained, clayey soils on prairie uplands.

2.3.3 Field Investigations

2.3.3.1 Subgrade Explorations

Subsurface Exploration to include geotechnical testing was performed by A&M Engineering. Subsurface exploration included a total of 20 – 10-foot borings to account for the proposed rigid parking apron/towways and for the flexible shoulder and parking lots. Approximately 6 samples were obtained in the upper 10 feet of each bore. To collect samples, a thin-walled tube was http://en.wikipedia.org/wiki/Precipitation http://en.wikipedia.org/wiki/Enid,_Oklahoma#cite_note-24

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 20 used. SPT testing was also performed at each bore location and results included on the boring logs. Refer to the Civil Appendix for the complete Geotechnical Report.

2.3.3.2 Borrow Explorations for Fill

The site does not contain any satisfactory materials as defined in specification 31 00 00 Earthwork. Unsatisfactory materials may be utilized in pond embankments, however, borrow in all other areas under load bearing pavements, hangar, and grass shoulder shall be provided from source locations off base property by the contractor.

Geotechnical Engineer recommends that all fill material shall have a maximum particle size less than 2-inches, the liquid limits less than 35, the plasticity index 15 or less, and the material contain at least 15 percent fines.

2.3.3.3 Availability of Construction Materials

The contractor will be required to investigate all proposed materials to be used in this project, along with investigating the source of concrete aggregates that will meet the stringent requirements of the concrete specification UFGS 32 13 14.13 “Concrete Paving for Airfields and Other Heavy-Duty Pavements.” Martin Marrietta and Vulcan Materials both have granite quarries in Mill Creek, Oklahoma approximately 100 miles south of Tinker AFB. These quarries are connected by rail which is anticipated to be utilized to get material delivered to the base.

2.3.3.4 Evaluations of Existing Pavements

Not applicable to this project.

2.3.4 Testing

2.3.4.1 Laboratory

Selected samples of the subsurface soils were tested in the laboratory to include but not limited to visual and textural examinations (ASTM D-2488), classification (ASTM D-2487), moisture content (ASTM D-2216), Atterberg limit tests (ASTM D-4318), percent passing the No. 200 sieve (ASTM C-117), and unit weight (ASTM D-7263). Refer to the Civil Appendix for the complete Geotechnical Report Testing Results and boring logs in drawing set. All tests were performed in accordance with current ASTM standards by a US Army Corps of Engineers approved soils testing laboratory.

2.3.4.2 Field

In-situ plate bearing tests (PBTs) were conducted around the centerline of the proposed apron area to acquire modulus of subgrade reaction. A double ring infiltrometer test was also performed to determine infiltration rates for detention and underdrain requirements. Additional testing to include but not limited to Hydrometer (ASTM D-422), Modified Proctor (ASTM D1557), Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 21

Permeability (ASTM D-1557), and California Bearing Ratio (CRD C-654-95) were performed on representative samples.

2.3.5 Results of Investigation Testing

2.3.5.1 Material Characterization

The soils encountered near the top 15 feet from surface consist of lean to fat clay (CL, CH). The soils are moist and plastic with approximate PI’s of 30.

Optimum moisture ranged from 10.7% to 15.9% with an average maximum dry density of 118.16 pcf. CBR value of 2 and k-value of 35 pci was utilized for pavement design based on testing results and geotechnical experience with soils like those encountered on site. Refer to the Civil Appendix for the complete Geotechnical Report Testing Results.

2.3.5.2 Groundwater and Subsurface Drainage Conditions

Groundwater was observed in observed in some bore holes for the short duration the borings remained open. However, this does not necessarily mean the borings terminated above the upper saturated zone, or the water levels summarized above are stable groundwater levels. Due to the low permeability of the soils encountered in the borings, a relatively long period may be necessary for a groundwater level to develop and stabilize in a borehole. Long term observations in piezometers or observation wells sealed from the influence of surface water are often required to define groundwater levels in materials of this type. Groundwater can exist at varying depths during other times of the year depending upon climatic and rainfall conditions.

It is possible that seasonal variations will cause fluctuations or a water table to be present in the upper soils. Additionally, perched water may be encountered in discontinuous zones within the overburden or near the contact with bedrock. Water accumulation should be removed from excavations by pumping. Most of this site will be in a substantial fill condition and includes a drainage layer and an underdrain system to assist with any seasonal high groundwater levels.

2.3.5.3 Frost Considerations

Frost design was considered during the pavement section modeling for this project. Weather Station - Tinker_Afb_Airport was selected in PCASE modeling software for frost modeling input data. Frost code F3/F4 was selected for the onsite natural subgrade, fat clay (CL). Both Reduced Subgrade Strength and Limited Frost Subgrade Penetration was calculated, however the Non-Frost Design Thickness was thick enough that neither frost design methodology governed the pavement section layer thickness design.

2.3.5.4 Existing Pavement Evaluation/Characterization

Not applicable to this project.

2.3.5.5 Design Parameters

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 22

As mentioned above a CBR value of 2 and k-value of 35 pci was utilized for pavement design. For all other pavement design parameters, refer to the PCASE pavement design output reports in the Civil Appendix.

2.3.6 Pavement Thickness Design Criteria

2.3.6.1 Load

According to UFC 3-260-02 and the PCASE program, the PCC towway and hangar access aprons have been designed using Heavy Load Criteria. The use of Heavy Load was confirmed during the project design charrette meeting as this facility will be primarily used during the initial years for B-52 modernization. This facility is designed to accommodate all current and future airframes of the Air Force, so the pavement is designed to not limit the facility capability and to provide agility by accommodating all airframes. The table below provides loading and passes of the Air Force Standard Traffic, Heavy Load, which is to be used on all aircraft rated PCC for this project. Traffic Areas for this project are selected based on Heavy Loading criteria in accordance with Chapter 3 of UFC 3-260-02. Air Force Heavy Load is based on 20-year design life.

Airfield pavements are grouped into four different traffic areas dependent on weight of aircraft and channelization of traffic. The airfield pavements for this project consist of a towway north of the ACH, hangar access aprons to the west and east of the ACH, and the hangar floor. For Heavy Load airfields the towway, hangar access apron, and hangar floor are grouped into Type C Traffic Areas. Type C traffic areas are defined as those in which the volume of traffic is low, or the applied weight of the aircraft is generally less than the design weight. This definition is consistent with discussions during the charrette as the aircraft will not be full of fuel when accessing the ACH. One key distinction between this project and UFC 3-260-02 is the UFC only requires the main gear path of hangar access aprons and hangar floors are to be designed for Type C traffic with Heavy Load, with the remainder of the hangar access apron and hangar floor being designed to Type C Traffic Area and Light Load. As discussed during the design charrette Type C Traffic Area with Heavy Load is to be used for the full width of hangar access aprons and hangar floor to accommodate the various widths of main gear and parking configurations for the multiple aircraft types that will utilize the ACH.

Heavy Load Airfield Pavements

Design Aircraft

Traffic Area A Traffic Area B Traffic Area C Traffic Area D Overruns

Weight (Pounds)

Passes Weight

(Pounds) Passes

Weight (Pounds)

Passes Weight

(Pounds) Passes

Weight (Pounds)

Passes

F-15 E 81,000 100,000 81,000 100,000 60,751 100,000 60,751 1,000 60,751 1,000

C-17A 585,000 200,000 585,200 200,000 438,751 200,000 438,751 2,000 438,751 2,000

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 23

B-52H 480,000 120,000 480,000 120,000 359,999 120,000 359,999 1,200 359,999 1,200

*Per UFC 3-260-02 and PCASE

In addition to the aircraft rated PCC, Airfield Access PCC will be required within the wingtip clearance to the north of the ACH and for maintenance vehicles to the south. The traffic loading for the Airfield Access PCC utilizes the same pavement traffic contained within the KC46A Kitting Geotech Report in order to have the same loading capability at this facility. The traffic loading USACE provided for the KC46A Kitting Facility design that will be utilized for this project. The traffic loading utilizes a 20-year pavement design lift and consists of the following:

Airfield Access Drives Traffic Volume (Around Hanger)

• B1200 Aircraft Tow Tractor – 5 per week; 5,200 passes for design life

• 10-Ton Fuel Truck – 4 per day; 29,120 passes for design life

• P-23 Fire Rescue Truck – 1 per week; 1,040 passes for design life

• 3-Axle Truck – 2 per day; 14,560 passes for design life

• 5-Axle Truck – 2 per day; 14,560 passes for design life

• Large Truck/SUV – 4 per day; 29,120 passes for design life

Load of Airfield Access Pavements

Traffic Weight

(Pounds) Passes

B1200 Aircraft Tow Tractor 120,000 5,200

M978, HEMTT, 10-Ton Fuel Truck, 8x8

59,000 29,120

P-23 Crash Truck (Fire Truck) 77,880 1,040

Truck, 3 Axle 52,000 14,560

Truck, 5 Axle 102,000 14,560

Truck, Large Pickup or SUV 20,000 29,120

The new asphalt shoulders are according to UFC 3-260-02, Table 3-1, which requires a pavement section designed to handle 5,000 coverages of a 10,000-pound, single-wheel load having a tire pressure of 100 pounds per square inch (psi).

As previously mentioned, the predominate underlying subgrade material consists of a fat clay, (CL). The 2023 Airfield Pavement Evaluation Report

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 24 reports this material as a fat clay that was lime stabilized for the construction of the existing towway and MROTC apron. The existing subgrade is proposed to be stabilized with 4% lime across the entirety of the project site to aid in constructability and to meet the compaction efforts of fill material. In general, the existing soils are marginally suitable in supporting airfield pavement due to frost susceptibility, moisture sensitivity, and swell potential concerns.

The A&M Engineering Geotech report recommends a CBR value of 2 and a k-value of 35 pci for pavement designs. In all new pavement sections required, the subgrade is be prepared in accordance with UFC 3-260-02 “Pavement Design for Airfields” and according to the USACE’s PCASE program for all pavement reconstruction areas. The prepared subgrade compaction requirements appropriate to each individual pavement design will meet the requirements provided by the PCASE program and UFC 3-260-02.

According to current pavement design criteria, a drainage layer is to be incorporated into all new designs unless the infiltration rate of the underlying soils is greater than 20 feet per day and in a non-frost area, or if placement of a drainage layer along with an underdrain system is not practical due to cost.

The existing underlying subgrade material does not meet the infiltration rate, thus according to this design an underdrain system is shown with outlet pipes being primarily located in conjunction with storm drainage structure or pipe locations.

Drainage layers conforming to the slope of the hangar access aprons and towway, will allow water to travel to proposed edge drains. The edge drain design includes perforated and non-perforated piping, manholes, flushing risers, and backfill in accordance with UFC 3-250-01 “Pavement Design for Roads and Parking Areas.”

2.3.7 Pavement Thickness Design

2.3.7.1 Flexible Pavement Design

The flexible pavement design included in this project is for the required flexible shoulder for the existing towway widening and the shoulder of the proposed towway, north of the ACH. The pavement design was modeled in PCASE Version 7.0.6 and the PCASE generated report is in the Pavement Design Appendix. The 3.5-inch-thick asphalt will be specified to be constructed with a 2-inch gradation 2 surface course and 1.5-inch gradation 2 intermediate course. Asphalt binder will conform to ASTM D6373 for Performance Grade PG 70-28. Tack and Prime coats will be required between lifts with material requirement options as listed in project specifications. Grooving is not required for this project.

Summary of Pavement Cross Section for Shoulder Construction

Pavement Type/Description Heavy-Load Airfield

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 25

Flexible w/o Drainage and

Separation Layer

3.5-inch HMA

6-inch Graded Crushed Agg.

Base Course

8-inch Lime Stabilized Subgrade

(4%)

6-inch Subgrade Compaction at

95% Relative Compaction

2.3.7.2 Rigid Pavement Design

The three rigid pavement designs included for this project comprise of the PCC Towway/Hangar Access Apron, Hangar Floor, and Airfield Access Pavement. All pavement design were modeled in PCASE Version 7.0.6 and the PCASE generated reports are in the Pavement Design Appendix.

Specified flexible strength of rigid pavement designs is 650 psi. All jointing for new PCC meets the joint spacing requirements of UFC 3-260-02 with a typical slab size of 18.75 feet by 18.75 feet. Joint sealants are specified as preformed compression sealant at new PCC joints and self-leveling silicone sealant at abutting new PCC and existing PCC joints or along asphalt shoulders. Grooving is not required for this project.

Summary of Pavement Construction for Type C Traffic Areas

Towway / Hangar Access Apron

Rigid w/ Drainage Layer and

Separation Layer

22-inch PCC

5-inch Drainage Layer

7-inch Separation Layer

8-inch Lime Stabilized Subgrade

(4%)

6-inch Subgrade Compaction at

95% Relative Compaction

Hangar Floor

Rigid w/ Base Course

23-inch PCC

6-inch Aggregate Base Course

8-inch Lime Stabilized Subgrade

(4%)

6-inch Subgrade Compaction at

95% Relative Compaction

Summary of Pavement Construction for Airfield Access Pavement

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 26

Maintenance Pavement Around

Hangar

Rigid w/ Drainage Layer and

Separation Layer

12.5-inch PCC

5-inch Drainage Layer

6-inch Separation Layer

8-inch Lime Stabilized Subgrade

(4%)

6-inch Subgrade Compaction at

95% Relative Compaction

2.3.7.3 Overlay Design

Not applicable to this project.

2.3.7.4 Frost Design

Frost design was considered during the pavement section modeling for this project. Weather Station - Tinker_Afb_Airport was selected in PCASE modeling software for frost modeling input data. Frost code F3/F4 was selected for the onsite natural subgrade, fat clay (CL). Both Reduced Subgrade Strength and Limited Frost Subgrade Penetration was calculated, however the Non-Frost Design Thickness was thick enough that neither frost design methodology governed the pavement section layer thickness design.

2.3.8 Drainage Design

2.3.8.1 General Criteria

The stormwater management system must adhere to legal and regulatory mandates designed to safeguard water quality, prevent flooding, and support healthy ecosystems in downstream receiving waters. Given that the project is federally funded, located on federal land, and lacks public infrastructure, the stormwater drainage design is primarily guided by the Unified Facilities Criteria (UFC) developed by the Department of Defense. TAFB also operates its own MS4 permit that must comply with ODEQ regulations.

Any construction or renovation of Government facilities for the Department of Defense must be compliant with UFC 3-201-01 and UFC 3-210-10. The stormwater design requirements specified in these documents that are applicable to this project are summarized below:

• As the proposed storm sewer system will be located within a large building campus defined by large facilities and paved aprons, the airfield design storm is not appropriate. A 10-year design storm will be used for the storm sewer system.

• The maximum ponding depth above apron inlets during the design storm shall be limited to 4 inches.

• Storm drainage piping must not pass under buildings and must be a

Tinker Air Force Base, Oklahoma 65% Design Submittal

Design Analysis - 27 parallel distance of at least 10 feet from building foundations.

• To meet EISA 438 and UFC 3-210-10 the increase in runoff rate and volume between pre- and post-development conditions on the project site must be managed, to the maximum extent technically feasible, through interception, infiltration, storage, or evapotranspiration processes.

• The middle 50 percent of taxiways must not be inundated for a 10-year event.

• For channels with flows greater than 100 cfs, provide 1 foot of freeboard.

While local regulations do not apply to a majority of the project, they were referenced during design…