Canadian National Railways construction, betterments, etc.

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Maynooth Subdivision Bridges.—We are officially advised that a number of bridges on the old Central Ontario Ry., located within the Maynooth Subdivision, Ontario District, C.N.R., are to be rebuilt. Following are details of the old and new structures.

Long Lake Creek, mile 4.3.—The existing structure consists of two I beam spans each 18 ft. overall on 2 masonry abutments and one masonry pier built in 1882. This will be replaced by 2 reinforced concrete slab spans, each 18 ft. overall resting on the existing substructure, which will be left unchanged. The grade will be raised about a foot.

Cold Creek, mile 7.7.—The existing structure consists of 2 through plate girder spans, each 55 ft. 7 in. overall, and originally resting on 2 masonry abutments and one masonry pier, and was built in 1882. The spans are on a skew of 66 degrees, 15 min. Some years ago an additional concrete pier was built under the center of each span. This will be repaired with four I beam spans 24 ft. deep, the ends of which will be built normal to the track and skewed on the piers. These I beam spans measured along the center line, will be respectively 27th ft., 28 1/2 ft., 28 3/4 ft. and 29 1/2 ft. Some small additions to the existing masonry piers and abutments will be necessary to accommodate them.

Moira River, mile 36.6.—The existing structure consists of 2 through plate girder spans, each 45 ft., overall, resting on 2 masonry abutments and on a masonry pier built in 1883. This will be replaced with 4 reinforced concrete slab spans, each 22 ft. 7 1/2 in. overall, 2 new concrete piers will be added to the existing substructure to carry them, and new copings will be built on the abutments. The foundations are all of solid rock. The grade is to be raised 3 ft.

Moira River, mile 46.3.—The present structure is a through plate girder span, 45 1/2 ft., overall, resting on masonry abutments, built in 1884. The new work to be done is the building of a skew pier; half-way between the abutments, the addition of copings to abutments, and the installation of 2 spans of reinforced concrete slabs each 22 ft. 10 3/4 in. long on the center line. Each span will consist of 2 slabs. The pier will rest on solid rock. The grade will be raised 2 1/2 ft.

Beaver Creek, mile 60.3.—The existing structure is a through plate girder span, 75 ft. overall resting on masonry abutments built in 1884. The new work will consist of the addition of concrete wings to the existing abutments and the replacing of the superstructure with a half through plate girder 74 1/2 ft. overall. The grade will be raised 3 ft. to give room for a more modern design of deck.

All these bridges are now too light for the locomotives which it is desired to operate over the subdivision, and are being reconstructed to Cooper's loading class E. 40, with 4000 lb. uniform load.

Railways: C.N.Rys.

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