Notes:Lothrop Street
Named for Sylvanus Lothrop
- Photograph descriptions from Historic Pittsburgh: "The structure [Lothrop Hall] and street are named for Sylvanus Lothrop, an important Pittsburgh engineer and businessman who built the first locks and a number of major bridges on the Monongahela River during the 1830s and 1840s."
- https://pittnews.com/article/26145/archives/lothrop-street-dedicated-to-dr-starzl/
1916-02-27: Source:Fleming-canal: "The map [of Barbeau and Keyon] records that S. Lothrop was the architect of the aqueduct bridge."
1916-06-25: Source:Fleming-old-citizens mentions Sylvanus Lothrop six times.
1916-07-02: Source:Fleming-old-allegheny: "His [Hezekiah Nixon's] next important contract was the erection of the mill of Sylvanus Lothrop, James Anderson and Henry Blake, spoken of last week as the first rolling mill on the North Side, built in 1826–1827. This was at the outlet of the canal at Darragh street on the river bank."
1941: Source:Old-allegheny-city
- pp. 59–60: "Allegheny Town was still a struggling frontier settlement of about 800 persons when other industries came to the village. One of these, the Juniata Rolling Mill, was erected in 1826 on what later became West Robinson Street. The founders, Henry Blake, Sylvanus Lothrop, and James Anderson were lured to the Allegheny bank of the river by the proximity of iron ore deposits. The plant was taken over in 1834 by John Bissell, [p. 60] William Morrison and Edward W. Stephens, and operations were expanded from the original blooming mill to include a nail factory and a puddling process department. The plant prospered until the growth of the city caused it to move to Ohio just prior to the outbreak of the Civil War. At its peak of production the mill employed about 60 men."
- p. 136: "He [Colonel James Anderson] was one of the projectors of the first iron mill erected within the limits of Allegheny Town. Built on the west side of Darrah Street (Dasher Street), it extended from Robinson Street to the Allegheny River, near the Columbus outlet of the Pennsylvania Canal. The mill began operations in 1827 and was conducted by the founders, James Anderson, Sylvanus Lothrop and Henry Balke [sic]. Balke [sic] sold his interest to William Steward and the new firm continued business until 1834 and then sold out to John Bissell, William Morrison and Edward W. Stephens."
2013: Source:Rooney-peterson, p. 8: "Iron manufacturing also became an important part of Pittsburgh's economy in the early nineteenth century. Allegheny Town's first iron mill was the Juniata Rolling Mill, built by Colonel James Anderson, Sylvanus Lothrop, and Henry Blake in 1826–27 on the western part of the present PNC Park site. By 1833, the Juniata Rolling Mill employed seventy-five men and was the third-largest iron mill of approximately thirty then operating in the Pittsburgh area. Under a succession of owners and managers, the Juniata Rolling Mill made nails, some lower-quality steel, and iron blooms—the crude masses from which wrought iron was made—until 1859."
2018: Source:Engineering, pp. 39–40: "After sending a committee to the state capital to lobby, the canal commissioners adopted a plan to bring the canal into the village of Allegheny and turn left at a basin to outlet into the river at a location about seven hundred feet downstream of the Sixth Street Bridge. To avoid the toll for wagons crossing the Allegheny River Bridge, the canal commission awarded a contract for a [p. 40] canal aqueduct over the Allegheny River to William LeBaron and Sylvanus Lothrop on June 3, 1827. With seven spans each 160 feet long, the aqueduct was constructed across the Allegheny River along what is now the upstream side of the Norfolk Southern bridge into Eleventh Street. The aqueduct had a wooden trough with heavy, two-and-a-half-inch-thick white pine planks that were laid diagonally in two courses to hold the water. A sidewalk was located along one edge of the aqueduct, and a towpath was located along the other. A roof protected the trusses from the weather."
