Class 1 (Locobase 12469)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 23, p. 197. Works number was 18555, 18650 in January 1901 and 18699 in February 1901.

Jointly owned by the Chicago, Burlington & Quincy and the Chicago, Milwaukee & St Paul, the DRI & NW was a terminal railroad in the Tri-Cities area that spanned the Mississippi between Iowa and Illinois.

The two owners divvied up the class in 1903-1904.

The 1 came onto the Milwaukee Road roster in 1904 and was joined by the 3 in 1906. The pair was placed in its own H7-c class, numbered 521-522, 746-747, and finally 731-732 and operated for that railroad into the 1920s. Both were scrapped in September 1928.

The Burlington took the #2 in 1903, classed it as A-6, and numbered it 479. Later renumbered 200, the ex-2 was scrapped in April 1923.

Class H3 (Locobase 9873)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 575 in July 1872, 586 in October, 587-590 in in November, 597 in January 1873, 604 in March; 615-616, 618 in June; 621-622 in July, 623-624 in August, 633 in January 1874, and 637 in March..

Not long after their delivery, their purchaser underwent a renaming, emerging as the readily recognizable Chicago, Milwaukee & Pacific. A few bore names, at least initially. 163 was Marion, 164 John Gray, 182 D C Greene, 187 Mason City, 189 A J Earling.

On average, the class served the Milwaukee Road for at least a quarter of century and several remained on the roster into the 19teens.

Class H3 (Locobase 9875)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Some sources estimate Pittsburgh works numbers 381-382.

Over their long lives, this pair was renumbered twice. 107 was scrapped in December 1917, 108 in April 1918.

Class H3 (Locobase 9876)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 10, p. 20. Works numbers were 5049, 5052 5063, 5067 in April 1880p; 5092, 5097, 5120, 5123 in May; and 5134-5135 in June.

Most of these operated for more than 30 years before being scrapped in the 'teens. Ex-304 was sold to Ozone Lumber in 1913.

The Milwaukee Road diagram says that the tube heating surface area was 725 sq ft (67.35 sq m), but shows the same number of tubes of the same diameter and length as in the specs. It's possible that the H3's later boiler had 19 or 20 fewer tubes, but Locobase cannot confirm.

Class H3 (Locobase 9877)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 587-590 in 1872, 597 in 1873.

A small Massachusetts builder secured the contract for this quintet and delivered classic American locomotives of the time. Three had left the Milwaukee Road roster by 1899 when the 166 received new number 1284 and 169 took 1310. The latter was scrapped in February 1901.

1284 endured two more renumberings (1450 in 1910, 147 in 1913) before being scrapped in 1918.

Class H4 (Locobase 9878)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 and CM&StP List and Description of Locomotives 1886 supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 1065-1066 in September 1877; 1091, 1093 in August; 1102-1104 in September; 1273-1274, 1276, 1278-1284 in September 1880; 1322, 1324 in February 1881; 1563-1572 in May 1882.

Data above comes from the 1930 diagram and reflects the consolidation of several locomotive batches under a common update. All the Eight-wheelers came from Schenectady in 1877-1882 as passenger locomotives, but the details vary.

The first set -- 209-210, 221-225 in 1877 were delivered with 17"x 24" cylinders, grates measuring 15.8 sq ft (1.47 m) in area, 160 tubes (209-210) or 170 tubes (221-225), each 11 ft 4 in (3.45 m) long, and 61" (1,549 mm) driver centers--3" tires would yield a 67" driver diameter. They would be upgraded to the specs shown in the data table.

The other batches -- road numbers 358-367, 392-393, 538-547--defined the H4s as shown in the data. Changes from the first group included taller drivers, more cylinder volume, 5" inch longer grates and three more tubes. Adhesion weight rose by 3,400 lb (1,542 kg) and engine weight increased by 5,000 lb (2,271 kg).

All were scrapped inthe 1914-1918 period.

Class H5 - long pattern (Locobase 9881)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 1004

1090 in 1882; 1137-1138 in 1883.

This quartet of New Hampshire engines joined the 90 Rhode Island locomotives (Locobase 9880) equipped with the longer 11 ft 10 in (3.61 m) tubes.

Three were scrapped in 1918. 408 served nearly another decade before being broken up in July 1927.

Class H5 - short pattern (Locobase 9879)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 788-792 in July 1879, 795-799 in September, 800-804 in October.

Fifteen Ocean Staters had what the Milwaukee Road diagram described as a short pattern of tubes. Two years later, the Milwaukee repeated the design, but added 6 1/2" (165 mm) to the tubes; see Locobase 9880.

By that time, presumably, this class had been paid for and so served the Milwaukee Road through several renumberings and up to and beyond four decades. The first were scrapped in May 1918, the last (304) in July 1927.

Class H5-a - long pattern (Locobase 9880)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 963-972, 1016-1045, 1134-1183 in 1881-1882.

After delivering fifteen Eight-wheelers with 11 ft 3 1/2 in (3.44 m) long tubes, the Ocean State builder delivered six times as many locomotives with the 11 ft 10 in (3.61 m) tubes. A likely reason was to gain more heating surface for the cylinder volume without having to adjust the rest of the balance. The change increased the engine wheelbase by 6" (152 mm).

Lke the H-5s, the H-5a class served the Milwaukee for decades.

Class H5-c (Locobase 9882)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

NB: The Milwaukee Road's diagrams for older locomotives show tube heating surfaces derived from the inside (fire side) diameters of the boiler tubes. In this entry, that amounts to 786 sq ft (73.02 sq m). Added to the firebox heating surface area, total evaporative heating surface area comes to 892 sq ft (82.87 sq m). For easier comparison, Locobase's tube area is based on the external (water side) diameter given in the original diagrams.

Class H6 (Locobase 9883)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. This class had many fathers: 10 from Rhode Island (works numbers 1687-1696, road numbers 684-693), 10 from Brooks (works numbers 1148, road 705, 10 from Cooke (works numbers 1754-1763. road 721-730), 10 from Grant produced in December 1887, road numbers 731-740).

Class H7 (Locobase 9884)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 1179-1183, 1272-1281,

1289-1293, 1304-1306, 1470-1471, 1676-1677.

Eighteen Eight-wheelers with mixed-traffic dimensions, these engines clearly satisfied requirements as to fitness for their duties and, apparently, solid construction. It may have helped that these were the only Milwaukee Road 4-4-0s fitted with cylinders as big as 18" in diameter.

All served for at least 40 years and several passed their 50th birthdays before being scrapped in the late 1930s.

Class H7-b (Locobase 9886)

Data from Milwaukee Road 1930 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 2962-2965 in December 1889, 2966-2971 in January 1890.

Other than the relatively high boiler pressure in the 1930 specs, which likely represents a replacement boiler, these engines had all the hallmarks of a typical American-type Eight-wheeler of the time.

All ten remained in Milwaukee Road service for more than 30 years before going to the scrapper beginning in July 1927 (721) and ending with the 724 in August 1933.

Class H8 (Locobase 9874)

Data from Milwaukee Road 1945 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also "Locomotive Building," The Railroad Gazette, Vol XXXVIII, No 17 (28 April 1905), p 149.

This set of relatively large Eight-wheelers came from the Paterson, NJ builder as the CS was completing its construction from Chicago due south to Quaker, Ill (near Dana). Its incorporation in September 1904 soon led to three years of construction before it opened in November 1907.

The 1905 order description for this set of Eight-wheelers included a count of 270 2" tubes, which resulted in a higher heating surface area than the 1945 diagram showed. The 1945 diagram revealed that the firebox heating surface included 12 sq ft of arch tubes.

The CS was reorganized with the Southern Indiana Railroad in 1910 as the Chicago, Terre Haute & Southeastern. And in 1921, the Milwaukee Road negotiated a 999-year lease on CTH&SE. That's when this nonet received its H8 class ID and higher road numbers.