Richmond enquirer. [volume] (Richmond, Va.) 1815-1867, 1833-04-26
NEW ADVERTISEMENTS.
DEPARTMENT, !


FUNHE President of the United States having decided
- on the plan Of the Bridge authorized TO be built
across the Potomac River, the City OF Washington
Proposals, sealed and endorsed will be received by the
Secretary Of the Treasury until the 10th OF May inclu-
sve for the materials and Workmanship the same
ably to the terms and specific atoms the work.
The Bridge will have Ill archie. and 2 draws AZ piers
and abutmens with their half piers. The arches
96 feet and 20 feet rise above the sprDgng ne and
TO be curves OF several centes semi eipses The pi-
ers a abutmens to rise feet above low WATER and be
OF sufficient breadth to sustain each the force depen
dent arch.
The draws to be each 65 feet wide;one to be placed
at the Maryland Washington channel the at the
Virginia channel The bridge be SO feet wide between
the parapets, and the carriage
tai from sbutment TO abument The piers arches and
abuments to be oil granite, and to be founded on piles
the solid rock according to the nature of the bottom
The parapets to be each Is inches thick and feet
above the roadway. The arches be feet inches
thick at the key, aud feet inches the springng line;
except the facing ring stones the extrados Of which
viii be segment OF circle TO be described with the
greatest radius OF curvature.
The launches to be filled in with good rubble mason
ry, laid in mortar TO height that shalt be sufficient i'm ad-
dition to the weight of the dead wang together with
that OF the parallel brick walls backs &C. to ba
lance or equaliberate the arches.
The road way TO be nine inches thick MacamzeJ and
TO rest on flat stones laid the brick spandrell als
The foot ways to be raised above the level of tho carriage
way and tagged The water TO be carried oil by suf-
cien drains and pipes the backs the arches and
through the piers and abutments.
On the alling, the piers forming the facing
OF the pier-heads, pasters of granite be placed
The piers to be at least IL feet broad and 80 long
the spinging line, and to be l9 feet broad low water
The pier heads TO be uncated semi cones capped-he
upper radius feet inches and the lower such that the
pier-head shall batter in than feet below
low water
The draw piers TO be % feet broad the springn ing
line and TO batter in the all the other pie
except on the side of the draw which is be vertical
TO feet below low water.
The piers at greater depth than feet below low
WATER TO batter in H. and have sufficient osets all
around them
The abutmens to have the thickness the draw
piers exclusive of the thickness of the half piers The
masonry OF the piers, half piers and abutlnens TO be of
rough range work OF hard granite ofvery large
laid in hydraulic cement The arch stones piIasters
don, and pafapets TO be range work, rough hammered
The parallel walls the back of arches and piers
be OF hard brick and together with all the other masonry
above the spingng line be laid in the best lime mortar
The timber to be used in the foundations to be yellow
pine white oak.
The masonry of the piers and abumens be carried to
the depths indicated by the following table, which exhi-
bits also the depth of the aluvia deposit distances
1l5teet proceeding from the Washington abument