The Arizona sentinel., 1911-07-20
San Diego & Arizona Building
 Toward Yuma Slowly But Surely

Speaking of the construction work on the San Diego and Arizona rail- road, the San Diego Union says:
 Since the ending of the revolution m Mexico affairs of the San Diego & Arizona railroad have taken such shape that construction of the road will progress at a more rapid rate than heretofore Agents recently have been busy securing right of way in the Imperial valley, and it is now eX- pected that construction of the road will be commenced at New river in the Imperial valley within the next two months and carried westward to meet he forces now at work beyond the present terminus of the line in Mexico. The management expects that trains will be running into Imperial valley and on to Yuma in two years.
 Four hundred men are employed by Robert Sherer & Co.,, grading con- tractors, just beyond the present end of the track, 36 miles from San Dieyo and q miles from Tia Juana. The company is increasing it's force of men as rapidly as possible, and eX- poets to have 500 men on the job with in the next thirty days.
 The present end of the track is at Valley Redondo Grading is being pushed from this place for distance Of eight miles to a point about eight miles from the west end of Tecate valley. Along this stretch six differ ent camps are being maintained by the contractors besides the 400 men and three huge steam shovels, about 200 head of stock and wagons and a large number of dinky engines and dump cars are being operated on the work.
 The steam shovels are used on some heavy cutting on a three-mile loop just beyond the end of the track ln the vicinity of Rock Springs. The dinky engines and dump cars haul the rock and earth away, as it is removed by the steam shovels. Beyond this the teams and wagons are at work. Val ley RLdondo and the end of the track are at the turn of the road at the east end of San of Ysidro valley. The loop where the steam shovels are at work follows the crest of mountain range and is similar to the famous Marshal pass in Colorado, but the grade is fal less.
 Many people ask why work
 does not progress faster on the
 San Diego & Arizona railroad.
 The answer is that to maintain a
 grade of one and four-tenths per
 cent and less in railroad con-
 struction through mountainous
 country is slow work. From Tia
 Juana the road passes through
 two tunnels and over numerous
 bridges, including two large steel
 viaducts. One of the tunnels in
 Mantanuco canyon is 200 feet long
 through solid rock. One half mile
 beyond this is the second tunnel
 POO feet long. These are the only
 tunnels on the line until Campo
 creek, 55 miles from San Diego is
 reached. From Jacumba Hot
 Springs up through Carisso gorge
 paralelling the San Diego Imperial
 county line, the tunnel work is
 especially heavy.
 Beyond the tunnels in the Manta nuco canyon, where the work was eX ceptionally heavy, the main track an several sidings follow San Ysidro val ley and along the mountain ranges Il where the main grading camps are 'c cated.
 On the sidings near Rock Spring great piles of steel rails, ties, spike and fish plates are ready~to be haule to the front as the railroad COT pany's force of so to 100 men pro gross laying track.
 The main track and numerous s1t ings and switches are laid to wher the grading on the loop is in progre'! In the construction of this road tn contractors haul few supplies by tean As there are few accessible roads tn track layers follow on the heels of tn