Semi-weekly herald., 1912-02-01
ADVERTISEMENTS FOR BIDS.

Notice is hereby given that the
Board of County Commissioners of
the County of La Plata, Colorado, will
receive sealed proposals for the con-
struction of the following bridges in
La Plata County, Colorado, according
to the plans and specifications at the
office of Roy F. Goodman, County
Surveyor, at the Court House in Du-
range, Colorado, to-wit:
No. l. A bridge spanning Pine
River situated near Columbus, Colo
RADIO.
Bridge shall consist of two 60 foot
spans or 120 feet of a combination
steel and timber; the class of construc-
ton of these two spans shall conform
strictly to the bridge just completed
at the Town of Animas City and shall
,, be constructed upon tubular piers and
abutments which shall not be less than
four feet in diameter and made of
steel not less than BIG of an inch
in thickness with a good lap on all
seams and well rivited; said tubes
shall be set in excavations as far be-
low the low water line as possible
and steel rails driven inside of tube
as far below the bottom of said tube
as they will go, leaving them pro-
ject upward into tube at least five
feet.
A pile driver will be furnished by
the County for the purpose of driv-
ing these rails, etc.
| After tubes and rails have been
placed as above specified, said tubes
shall be filled with concrete composed
of mixture of one part cement to
three parts sand and five parts gravel
or crushed stone. Said tubes and con-
crete to be brought up to the proper
grade and finished with the necessary
anchor bolts, etc.
Bids shall be for the complete fin
ished bridge ready for travel, includ-
ing such as bulkheads, wing walls, rip
rapping, etc, all of which will be
shown on the plans now being pre-
pared by the County Engineer. All
earth fills to approaches to be made
by County.
BRIDGE No. 2. Spanning Pine
River near the Town of Ignacio, Colo
rado.
Bids will be asked for the replac-
ing of the two 75 foot steel spans
now being taken apart and piled near
the site of crossing and an additional
new span of 80 feet on which con-
tractor will furnish figures on com
bination steel and timber span fol-
lowing the class of construction of the
Animas City bridge, and new 90
foot steel span constructed on the
order of the two rs foot steel spans
to be replaced.
The above spans to be placed upon
piers and abutments the same as that
specified for the Columbus bridge.
Also shall figure on n galvanized
steel wire cable suspension bridge
spanning the entire river; said span
shall be $50 feet between towers and
shall carry IA foot roadway suspend
ed from main cables by steel rods;
main cable towers shall be constructed
of reinforced concrete with good lead
bearing plate for cable; cable anchors
shall be set in concrete the proper
distances from towers and shall be
set deep and connected with one an
other clear across roadway.
Contractors will be requqired to
guarantee bridge to carry load of
at least Is tons, in the shape of
traction engine with wheel base of
nine feet. All iron, wire and cables
to be painted with a heavy coat of
asphaltum tar; all bids shall be for
the complete finished bridge ready for
travel, including such as bulkheads,
wingwalls, riprapping, etc. All fills to
approaches to be made by county.
BRIDGE NO. 3. Spanning the La
Plata River below Ft. Lewis, Colo
rado.
Shall be a 50-foot span combina-
ton steel and timber after the pat
tern of the bridge just completed by
the Town of Animas City and con-
structed upon tubular abutments the
same as those specified for the Co.
lumbus bridge, and shall be finished
complete ready for travel. Fills to
approaches to be made by county.
BRIDGE NO. 4. Spanning the Ami
mas River near Bondad, Colo.
Bids will be asked for the replac-
ing of two 90-foot steel spans, remov-
ing them from their present location
and placing them on tubular piers and
abutments; said piers and abutments
shall be constructed the same as those
specified for the Columbus bridge.
Said bridge to be finished complete
and ready for travel Fills to ap-
proaches to be made by County.
In the replacing of all bridges, con-
tractors will be required to take great
care in removing floor plank, joist
ratings, etc, and must figure on re-
placing all that seem to be in good
sound condition, using new material
when necessary. Contractor shall also
figure on Strengthening all bent steel
and replacing all broken or cracked
parts Of steel structures with new.
All bidders will be required to exam |
inc the location of the proposed works, |
its advantages, and difficulties, ETC.,
etc.
All bids to be filed with Charles
H. Conroy, County Clerk and Record
or Of La Plata County, on or before