This page is to help people understand whats going on with our progress with the Craig Bridge resting on Highway 12. It has been some time since they have moved
to the highway location and soon we plan to have them up. Currently we have engineering prints with Paul Spangler and DNRC. The Bridge has to be engineered for
pedestrian use in the 400 foot flood plane. The requirement for a permit request has yet to be submitted due to a lawsuit currently in progress with the County and
Broadwater Estates Subdivision. We are against the proposed easement because of the proximity between the planed placement of the bridge and the easement
itself. The Bridgeworks plans on moving forward with the permit request when the lawsuit is decided. We hope in the meantime to continue fund raising and painting
the bridge as we have done since the move.
|In the fall of 2007 Our Engineer, Martin Drivdahl finished the preliminary Blueprints on the
placement proposal for the introduction of the Craig Bridge into the Ten Mile Watershed Corridor.
New Survey,New Location
The Craig Bridge may locate to a more Eastern placement
from an original survey done last year in the Western
Boundary Proposal. Martin Drivdahl has completed the first
of several layouts and elevations for the new placement
concept in the Nursery Park Flood Plane. The Bridge may
now cross in a direct North West alignment to the east
overlooking the two remaining historic glass houses.
|~ PROJECT ~
Craig Bridge Helena Montana
Project Engineer: Martin Drivdahl
This packet is to assist in initial determination of the process of re-erecting the Craig Bridge.
The stats of the bridge are as follows.
Length: Measured with one piece steel contractor tape
Section A, current western, Historic Center of Craig Bridge (136 feet, 6¼ inch) Approx. 22 Ton
Section B, current center, Historic Sterling Ranch side of Craig Bridge (136 feet, 6 ¼ inch) Approx. 22 Ton
Section C, current eastern, Historic Craig side of Craig Bridge (136 feet, 6 ¼ inch) Approx. 22 Ton
Overall Length: Sections A,B,C, (409 feet 6 ¾ inch) Approx. 66 Ton
Width: Measured with one piece steel contractor tape
Section A, current western, (18 feet, 1 ½ inch)
Section B, current center, (18 feet, 1 ¼ inch)
Section C, current eastern, (18 feet, 1 ½ inch)
Height: Measured with one piece steel contractor tape
Section A, (23 feet)
Section B, (23 feet)
Section C, (23 feet)
These physical measurements were compared to ones done by the Department of Transportation prior to their removal from piers
in 2005. The measurements are accurate to within ¼ inch
|The Bridge has attachment plates that are (14 inches square) and (3/8 inches thick) with a “tong” of the same thickness that
protrudes (7inches) centered in the back of each attachment plate, this “tong” is (6 inches) wide and has a (1 ½ inch hole) through
the center. The photo represents one of eight attachment plates on the three bridges.
|The stringers that run the length of the each bridge start (20 feet) in from the outside of the attachment plates, each stringer is a
beam (5 ½ inches wide, 15 inches tall and 18 feet 1 ½ inches long).
Each stringer is then (19 feet 5 inches) on center apart from one another.