September 14, Coshocton County Regional Airport Authority Richard Downing Airport I Airport Rd. Coshocton, OH 43812

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1 Coshocton County Regional Airport Authority Richard Downing Airport I Airport Rd. Coshocton, OH September 14, 2017 Attn: Bethel R. Toler, Airport Manager RE: Pavement Condition Index Inspection Mr. Toler: The Office of Aviation conducted a Pavement Condition Index (PCI) inspection of your airport on 04/12/2017. It is our preference to schedule inspections on a three year rotating cycle. This inspection gives the airport and Office of Aviation a definitive picture of the current conditions of your airport pavement and the maintenance necessary to preserve them. This inspection is also an important component of the selection process for airport projects under Federal and State grant programs. The PCI values presented were generated using PAVER software. Your pavement inspection was conducted by: Mr. Russell Glenn Neice Sr. under contract to ODOT. Included below are observations on the current pavement conditions and recommended maintenance suggestions as follows: Runways: RWY 04/22 A & B both rated in satisfactory condition. The stress relief joints that were transversely cut and sealed on regular intervals are failing and allowing moisture to begin to compromise the substructure. We recommend rehabilitation of these joints to preserve the remainder of the runway pavement.

2 We also noted an occurrence of pop-outs on your newest asphalt runway pavement section. The surface loss of aggregate could be a sign of aggregate durability, other material or installation issues. This condition leaves surface voids that are and will continue to retain water, promoting premature environmental damage. A surfaceseal/seal-coat should be considered to preserve the remaining useful life of the pavement. Taxiways: The runway to parallel taxiway connector pavement sections were split consistent with the FAA initiative to address all work within the runway environment with any major rehabilitation projects while the runway is closed. Several Branch and Section identifiers have changed as well, consistent with current FAA design criteria and nomenclature. TWY A1-1, A1-2, & B1-3 all rated in good condition with the noted combination of environmental distresses such as weathering and transverse cracking (Stress Relief Joints) as the controlling distress. The remainder of your Taxiway sections TWY B1-1, B1-2 & C1-2 all rated in satisfactory condition. The distresses noted include weathering and longitudinal/transverse cracking consistent with the pavements age, use and maintenance levels. We recommend you document your Pavement Management Plan, then continue to monitor and maintain your taxiway pavements consistent with that plan.

3 Aprons: Based on use and marking, several Apron Taxilane pavement sections were split from the adjacent apron and/or taxiway sections consistent with current FAA design criteria. Several Branch and Section identifiers have changed as well, consistent with current FAA design criteria and nomenclature. ATL A scored a PCI value of 78 and is rated in satisfactory condition ATL D rated in fair condition with longitudinal and transverse cracking as the controlling distress. APR A & C are rated in satisfactory condition. Distresses include longitudinal/ transverse cracking and block cracking, which are predominately environmentally related. These asphalt pavement sections have also been saw-cut and sealed with stress relief joints, contributing to the distress density.

4 APR B rated in fair condition. Distresses include longitudinal/transverse cracking and block cracking at slightly higher distress densities than adjacent sections. APR D carries a PCI of 46 and is rated in poor condition. Distresses include weathering, raveling, longitudinal/transverse cracking and block cracking. These asphalt pavement sections also have been saw-cut and sealed with stress relief joints, contributing to the distress densities noted. Successive sealcoats on this pavement section have cracked and are retaining water at and just under the surface contributing to the noted delamination of the surface sealcoat and raveling of the underlying asphalt pavement. We recommend this pavement for Rehabilitation/Reconstruction.

5 Hangar Areas: While Section identifiers have remained constant, the description has changed in your hangar areas consistent with current FAA design criteria and nomenclature. T-Hangar Apron & Taxilane section T/H A was rated in fair condition. The distresses noted include weathering, longitudinal/transverse cracking and low severity block cracking, and are primarily environmentally related. T/H B rated fair showing similar distresses but with slightly lower densities. We suggest a crack-seal/seal-coat for both T/A A and B. T/H C rated poor with a PCI of 42. This unused pavement section is experiencing a variety of environmental and structural distresses with the controlling distress of depressions and swelling due in part to frost heave. If this pavement is to be retained it will require rehabilitation or reconstruction.

6 General Remarks: Drainage should be a consideration in any paving project. In some areas, the turf berm adjacent to the pavement has grown to the point of holding water at the edge of your pavement for extended periods of time, contributing to aggressive environmental damage in these areas. We recommend you initiate a project to address this issue thus extending the life of the adjacent pavement. We noted other areas where the drop-off at the edge of pavement exceeds the FAA allowed maximum. While the edge of pavement may be considered low traffic areas for aircraft movement, it is heavily trafficked by maintenance, snow removal and mowing activities. While this condition and maximum drop is primarily for aircraft safety, it also contributes to pavement edge cracking due to reduced lateral support and should be corrected. In addition we further recommend all future paving projects be designed to bring the pavement and adjacent safety areas into compliance with FAA design criteria. Our observations strongly indicate that preventative maintenance projects have been undertaken at your airport, demonstrating you have an understanding what preventative maintenance can do to extend the life of your pavements when done on a regular scheduled basis. A lapse in pavement maintenance could ultimately cost your airport, the State and FAA more in the long run by shorting the usable life of your pavement. However we do not have a copy of your Pavement Management Plan (PMP) on file with our office. A simplified Pavement Management Plan template has been made available and can be found as Appendix K to the State Grant Application, or on our web site at: Airports with active preventative maintenance programs for their pavements usually rank higher in the grant selection process. In order to better position your airport for future grant projects, we recommend you implement and refine an Airport Pavement Management Plan. If you have questions on your PCI inspection call our office at (614) or contact me direct at (614) Your pavement inspection can also be found on ODOT s web site under the Airport Pavement & 5010 link. ( Respectfully, John Stains P.E. Transportation Engineer Encl. PCI Exhibit