ENGINEER'S REPORT Northwest Missouri Regional Airport

111 Pages·2017·8.11 MB·English

ENGINEER’S REPORT

Schedule I
Apron Reconstruction

Schedule II
Runway Safety Area Grading

MoDOT Project No. 16-002A-1

Northwest Missouri Regional Airport

Maryville, Missouri

Sponsored By:
City of Maryville
Federal Aviation Administration
MoDOT

Issued for Bid
March 30, 2017

TABLE OF CONTENTS
Page
1.  Scope of Work ................................................................................................................................ 3 
2.  Photographs ................................................................................................................................... 6 
3.  Life Cycle Cost Analysis ................................................................................................................. 7 
4.  Design Standards ........................................................................................................................... 7 
5.  Environmental Protection .............................................................................................................. 9 
6.  Soils and Grading ........................................................................................................................... 9 
7.  Drainage ........................................................................................................................................ 10 
8.  Pavement Design .......................................................................................................................... 10 
9.  Recycling ....................................................................................................................................... 12 
10.  Material Availability ...................................................................................................................... 12 
11.  Pavement Marking ........................................................................................................................ 12 
12.  Signage .......................................................................................................................................... 12 
13.  Lighting ......................................................................................................................................... 13 
14.  FAA Owned Facilities ................................................................................................................... 13 
15.  Non-AIP work ............................................................................................................................... 13 
16.  Engineer’s Estimate ...................................................................................................................... 13 
17.  DBE Participation ......................................................................................................................... 13 
18.  Buildings ....................................................................................................................................... 13 
19.  Airport Operational Safety ............................................................................................................ 14 
20.  Predesign Meeting Minutes .......................................................................................................... 14 

Issued for Bid
March 30, 2017 1 Project No: 16-002A-1
APPENDICES
A. Project Exhibits
B. Engineer’s Estimate of Probable Construction Cost
C. Subsurface Exploration Report
D. Life Cycle Cost Analysis
E. FAA 5100 Pavement Design Form & Supporting Documentation
F. Construction Safety and Phasing Plan
G. Modifications to Standards

Issued for Bid
March 30, 2017 2 Project No: 16-002A-1
1. SCOPE OF WORK
A. Narrative
The scope of work for this project includes reconstruction of the east apron and regrading of the
runway safety area (RSA) on the south end of Runway 14/32. The scope of the project will consist of
two schedules of work split into two phases. Schedule I (Phase 1) is Apron Reconstruction northeast
of the terminal building; and Schedule II (Phase 2) is Runway Safety Area Grading on the Runway 32
end.
The apron reconstruction part of this project will remove and replacement the existing concrete apron
pavement including pavement demolition, lime stabilization of the subgrade, surface drainage, and
pavement markings.
Figure 1: Project Area Exhibit

This project shall have the following schedules described below in more detail:
Schedule I – Phase 1: Apron Reconstruction

This schedule will include the reconstruction of the northeast apron pavement and the subsidiary items
associated with this new pavement, excluding the new pavement in front of the fuel farm. The
pavement area adjacent to the fuel tanks was reconstructed last year to minimize the impact to fueling
operations during the reconstruction of the remainder of the apron. Fueling operations will remain
operable during project calendar days.

Construction for this schedule is identified as Phase 1. Schedule I – Phase 1 shall be completed
concurrently with Schedule II – Phase 2 within the 75 calendar days associated with the award of
Schedule I. The closure of Runway 14/32 is not necessary for Schedule I construction; however, the
runway shall be closed for the duration of Schedule II – Phase 2.

Issued for Bid
March 30, 2017 3 Project No: 16-002A-1
Schedule II – Phase 2: Runway Safety Area Grading

This schedule will consist of grading the Runway 32 Safety Area to meet design standards. The work
area surrounds runway end 32.

Construction for this schedule is identified as Phase 2. Schedule II – Phase 2 work shall be completed
in 10 days concurrently with Schedule I – Phase 1 work. Runway 14/32 will be closed for the duration
of Schedule II – Phase 2 construction.
B. Unique and Unusual Site Conditions
There are no unique or unusual site conditions encountered on this project.
C. Age of the Existing Pavement
The Portland cement concrete apron at Northwest Missouri Regional Airport was constructed in 1985.
This was the last major maintenance/rehabilitation to the pavement. At the last MoDOT Pavement
Condition Index (PCI) inspection in 2011, it was reported that there is high-severity joint seal damage
and low-to-medium-severity LTD cracking, faulting, and shattered slabs. Joint spalling, shrinkage
cracking and corner breaks were also noted.
D. Current PCI Value
The most recent pavement evaluation, May 2011, determined that the PCI value for the northernmost
apron section was 60, which indicates the need for rehabilitation. At the time of the 2011 inspection,
it was projected that with no maintenance and due to load, climate, durability and other factors, the
PCI value in 2017 will likely be 49.
Figure 2: Northwest Missouri Regional PCI Map

Issued for Bid
March 30, 2017 4 Project No: 16-002A-1
Figure 3: Northwest Missouri Regional PCI Map

E. History of Work Performed in Project Area – Apron
This section of the apron pavement was constructed in 1985 using Portland cement concrete. No
other major work has been conducted since the initial construction.
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March 30, 2017 5 Project No: 16-002A-1
2. PHOTOGRAPHS

Figure 4: Joint spalling on apron pavement (2011).

Figure 5: Overview of apron (2011).

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March 30, 2017 6 Project No: 16-002A-1
3. LIFE CYCLE COST ANALYSIS

A Life Cycle Cost Analysis was performed for the apron pavement to evaluate the 20-year costs
comparing the reconstruction of this area with a Portland cement concrete pavement section versus a
bituminous pavement section. Based on the analysis for a 20-year design life the Concrete Alternative is
12% cheaper than the Asphalt Alternative. The reconstruction of the apron will be using a Portland
cement concrete pavement section.
The Life Cycle Cost Analysis in included in Appendix D of this report.
A. Asphalt Alternative:
5.0 inches of Bituminous Paving Course (P-401)
7.0 inches of Aggregate Base Course (P-209)
9.0 inches of Fly Ash Treated Subgrade (P-158)
B. Concrete Alternative:
6.0 inches of Portland Cement Concrete Pavement (P-501)
6.0 inches of Aggregate Base Course (P-209)
9.0 inches of Fly Ash Treated Subgrade (P-158)
The life cycle cost comparison favors the new rigid pavement on base course section due to the 20-
year overall cost, including the proposed maintenance and rehabilitation of each pavement section.
The analysis takes into consideration initial cost and maintenance of each section over a 20-year time-
period.
The comparison yielded the following results:
Initial Costs - Asphalt Alternative $46.48 per Square Yard
Initial Costs - Concrete Alternative $66.87 per Square Yard
20 Year Lifespan Cost - Asphalt Alternative $81.40 per Square Yard
20 Year Lifespan Cost - Concrete Alternative $71.41 per Square Yard

See Appendix D for supporting documentation for the Life Cycle Cost Analysis.
4. DESIGN STANDARDS

The Northwest Missouri Regional Airport apron, RSA and other items associated with the reconstruction
of this pavement are designed to meet the requirements and specifications of MoDOT Aviation, the
2011 Missouri Standard Specifications Book for Highway Construction, and the most current FAA
Advisory Circulars. The new proposed apron pavement grades will meet the pavement surface grading
requirements not to exceed a 2% slope. The RSA will tie into existing areas and will vary between 1.5%
and 5%. The Advisory Circular 5300-13A Airport Design was referenced for establishing the
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March 30, 2017 7 Project No: 16-002A-1
components of this project. The geometry used for design of aircraft taxiing pavements is that of the
Taxiway Design Group (TDG) 2. The runway is designed to meet the requirements of a Runway Design
Code (RDC) for a B-II runway.
The apron construction shall include taxilane centerline and tie down pavement markings. Included in
this project will be the painted hold bar and centerline marking for the connector taxilane at the
southernmost portion of the airfield. The centerline will connect in with the centerline of the connector
taxilane just north, that was completed in the Runway 13/31 reconstruction project of 2016. These
markings shall comply with the Standards for Airport Markings, AC 150/5340-1L.
To determine operational usage of pavement on this northeastern portion of apron pavement, autoturn
was utilized. A group I and group II aircraft path was reviewed for use over the apron area for operations
such as refueling, taxiing to and from the runway, parking at the tie down locations and taxiing to hangars.
Upon review of the pavement usage, it has been determined that the bulk of this pavement is eligible for
the project up to 27 feet from each hangar. The 27 feet of pavement in front of the existing hangar is
considered part of the building and building eligibility rules apply. Pavement removal and tie-in will be
much easier at existing concrete joints. Upon consideration of existing concrete joint layout, the actual
width reconstructed along the northeast edge of the apron will be within approximately 22’ of the hangar
entrances, at an existing concrete joint. Due to larger panel sizes, the south border of the apron in front
of the larger City-owned hangars will be reconstructed to approximately 15’ in front of the hangar. These
slight expansions of the eligible area will help to reduce construction costs for saw-cut, joint sealant, and
removal of partial panels.
Project pavements were analyzed and designed to ensure positive drainage of all pavement surfaces. All
portions of the proposed airfield pavement will be situated below the Primary Surface, Transitional
Surface and/or Approach Surface, as required by CFR Part 77.
ADG II
Runway Item Comments Standard Met?
Standard

Runway Widths 75' (14/32) Yes
Centered on the Runway
Runway Safety Area Width (RSA) 150' Yes
Centerline
Extending from both Runway
Runway Safety Area Length (RSA) 300’ Yes
Ends
Runway Object Free Area Width Centered on the Runway
500' Yes
(ROFA) Centerline

Issued for Bid
March 30, 2017 8 Project No: 16-002A-1