Evening star. [volume] (Washington, D.C.) 1854-1972, 1909-09-19
BY HOWARD FISK.

NE of the many interesting ex-
hibits at the Alaska Yukon-P Pa
cific exposition is that OF the
office of public roads or the
United States Department OF
,,r;.,,1ture The exhibit is complete III
everv detail and unique in many ways.
fe.+nra Of the federal government COLI
<r,b,,tion to the exposition are the strlk-
ine examples in miniature of MODEL roaos'
IN order that the visitor might not mere
Nv Immediately appreciate the benenceh'
effects of perfected highways, but also DC
able TO understand the methods of their
construction.
Probably the most striking feature OF
the display is the miniature model of a
section of Rock Creek Park-considered
the most beautiful of the many breathing
spots in the District Of Columbia. In this
handsome miniature IS shown not only
some of Rock Creek Parks most pic
turesque landscape features. but also
some of the best examples obtalnable Oh
scientific road construction. The model IN
cludes the famous Bowlder bridge, the
Pebble bridge and one other, with Rock
creek passing beneath them and winding
In and out among the hills.
The miniature sections illustrating
every type Of road now in use. probably
appeal to the scientific road builder
more than the picturesque exhibits.
Among the types presented on view, built
to exact scale, are macadam, bitumi-
nous macadam, tarred macadam, TelfOrd,
Stag, asphalt. Stag tar, oiled macadam,
oiled earth, sand clay, burnt clay and
dragged earth. There are approximately
1875, 900 miles of earth road In the United
States out of a total mileage of 2,15O.-
QUO.
y y
The miniature of Rock Creek Park
shows the relationship of roads and
bridges to rugged topography The high
ways which cut the park are considered
splendid examples of the road-builder's
art, the grades being easy and the road
beds being surfaced with trap rock Of the
best quality. Bowlder bridge and Pebble
bridge which are shown in the model,
are picturesque ornaments, Bowlder
bridge. which fits tremendously into the
scene, being especially attractive in col
oring. as it was constructed from bowld-
ers picked from the bed of the stream. OF
all the attractive features in Rock Creek
section of the road which runs past
P.arceS old vfne-covered mill with it's
broken wheel and shimmering mill pond.
For seven miles this road follows tortuous
windings of Rock creek. each twist and
turn revealing a new vista of wild and
picturesque beauty. Passing from the
gorge through which the stream flows
this road branches into others, which by
slight detours and gentle inolines lead to
high plateaus from which the stately
Capitol may be seen in the distance.
There are also exhibited models of the
various kinds of road machinery used in
the construction OF roads and implements
to keep them m repair as they become
worn. The exhibit includes crushing
plant, in operation, wheeled road scraper,
road grader. elevating road grader and a
macadam road with road roller in opera
ton. The stone crushing plant is con-
stdered an Indispensable adjunct to the
building Of first-class stone roads, If the
work is to be we'll and cheaply done, as a
plant must be complete and conveniently