1st. Respecting the parts to be repaired. The extreme limits within which your operations will be confined are, the point of intersection of the road with the western boundary line of the State of Pennsylvania, and Cumberland, in the State of Maryland; the dividing line between these States will be considered as dividing the line of the road to be repaired into two divisions, and the division within the State of Pennsylvania will be subdivided into six equal sections, and that within the State of Maryland, into two; then, having made a thorough examination of each of these sections, with a view to make yourself acquainted with their exact condition, you will classify them in the order of their condition, placing the worst first, the next worst second, and so on, making the best the last. You will then make an estimate for the repairs of each of these sections, to ascertain how far the appropriation, which is one hundred and fifty thousand dollars, will go toward repairing the whole road. Separate contracts will then be made for executing the repairs, commencing with No. 1, and passing regularly through the sections, as classified, to the best section; and these repairs will be prosecuted with as much despatch as the nature of the case will allow. Should you deem it advisable, in letting out these sections, to retain any portion of them which may seem to require but slight repairs, and which repairs could be executed with greater economy by having overseers and laborers to act under your immediate direction, you are at liberty to do so, bearing in mind, however, that whenever the repairs of the road can be made with equal economy, it is the wish of the department that they should be made by contract. As soon as one or more of these sections are finished, you will notify the commissioners appointed to receive this road by the laws of Pennsylvania and Maryland, approved, that of the former on the 4th day of April, 1831, and that of the latter on the 4th day of January, 1832, that these sections are ready to be turned over to the State, and you will accordingly turn them over.
2d. Respecting the mode of repairs. In order to insure efficient and permanent repairs, they are to be made on that which is called the Macadam system; that is to say, the pavement of the old road must be entirely broken up, and the stones removed from the road; the bed of which must then be raked smooth, and made nearly flat, having a rise of not more than three inches from the side to the center, in a road thirty feet wide; the ditches on each side of the road, and the drains leading from them, are to be so constructed that the water cannot stand at a higher level than that which is eighteen inches below the lowest part of the surface of the road; and, in all cases, when it is practicable, the drains should be adjusted in such a manner as to lead the water entirely from the side ditches. The culverts are to be cleared out, and so adjusted as to allow the free passage of all water that may tend to cross the road.
Having thus formed the bed of the road, cleaned out the ditches and culverts, and adjusted the side drains, the stone, reduced to a size not exceeding four ounces in weight, must be spread on with shovels, and raked smooth. The old material should be used only when it is of sufficient hardness, and no clay or sand must be mixed with the stone.
In replacing the covering of stone, it will be found best to lay it on in strata of about three inches thick, admitting the travel for a short interval on each layer, and interposing such obstructions from time to time as will insure an equal travel over every portion of the road; taking care to keep persons in constant attendance to rake the surface when it becomes uneven by the action of the wheels of carriages. In those parts of the road, if any, where materials of good quality cannot be obtained from the road in sufficient quantity to afford a course of six inches, new stone must be procured to make up the deficiency to that thickness; but it is unnecessary, in any part, to put on a covering of more than nine inches. None but limestone, flint or granite, should be used for the covering, if practicable; and no covering should be placed upon the bed of the road till it has become well compacted and thoroughly dried. At proper intervals, on the slopes of hills, drains or paved catch-waters must be made across the road, when the cost of constructing culverts would render their use inexpedient. These catch-waters must be made with a gradual curvature, so as to give no jolts to the wheels of carriages passing over them; but whenever the expense will justify the introduction of culverts, they will be used in preference; and in all cases where the water crosses the road, either in catch-waters or under culverts, sufficient pavements and overfalls must be constructed to provide against the possibility of the road or banks being washed away by it.
The masonry of the bridges, culverts, and side walls, must be repaired, when it may be required, in a substantial manner, and care must be taken that the mortar used be of good quality, without admixture of raw clay. All the masonry to be well pointed with hydraulic mortar, and in no case must the pointing be put on after the middle of October; all masonry finished after this time will be well covered, and pointed early in the following spring. Care must be taken, also, to provide means for carrying off the water from the bases of walls, to prevent the action of frost on their foundations; and it is highly important that all foundations in masonry should be well pointed with hydraulic mortar to a depth of eighteen inches below the surface of the ground.
As the laws on the subject of this road do not seem to justify a deviation from the original location, you will be careful to confine your operations to the road as you find it located; but, as it is believed that its axis may be dropped without adding much to the expense in those places where its inclination with the horizon exceeds four degrees, you are authorized, under the exercise of a sound discretion, to make this change.
In making your contracts, it must be understood that you are to have the general supervision of their execution, and that it will be your duty to see that all labor and materials (provided for by them) be applied in the most faithful and substantial manner. These contracts must provide in their specifications for all the work that can be anticipated, and should it happen that additional stipulations are afterwards found to be necessary for either workmanship or supplies not originally provided for, the facts must be reported to this department, and, with its approbation, if obtained, new contracts will be made for the additional services and supplies required; and it must be distinctly understood by the contractors that no payment will be made for work not provided for by their contracts.
Mr. L. W. Stockton, of Uniontown, has been engaged on this road and is intimately acquainted with every part of it, as well as with the adjacent country; and, as he has offered his services, you would do well to call upon him and avail yourself of them in any capacity that may seem to you best.
As soon as it can be done, a drawing of the whole road, with details of construction, will be forwarded, to be filed in this office.
You will take up your headquarters at any point on the road where your services may appear to you to be most needed; and, as soon as you shall have completed such an examination of the road as will place you in possession of the information necessary to draw up the specifications to your contracts, you will invite proposals for those contracts through the public prints. These contracts will be closed with as little delay as the interest of the road will allow, when the work will be commenced, and the contracts, together with the proper estimates, forwarded to this office. For the mode of making these estimates, keeping your accounts, and conducting your correspondence with this office, you are referred to the regulations of the Engineer Department.