Hazelwood is a neighborhood divided in two by railroad tracks. On one side of the tracks are Hazelwood Green, a residential enclave, and some industrial and commercial uses. This is what is across the tracks:
Second Ave
Hazelwood Ave
Other Sites:
While poking around the map collection at Chicago’s Public Library, I discovered that the structures carrying roads over the railroad tracks in Grant Park are considered viaducts. The word viaduct brings to my mind a Roman structure soaring over a valley floor and conveying a flat road on top of towering stone arches. The Chicago “viaducts” do not fit that image. To me, they look like bridges with no striking difference between them and Chicago’s river bridges other than color and style of ornamentation. Both groups of structures have fairly flat roadbeds supported by piers. I am puzzled why one set of structures is called bridges and the other viaducts.
The main difference seems to be that the bridges are crossing a body of water while the viaducts are crossing an obstacle on land. This doesn’t feel like the answer, though. I’ve walked over 50 bridges in Pittsburgh, the majority of which are over land. Not one of these structures is called a viaduct. To help find clues to solve this puzzle, I looked up the definitions of bridge and viaduct.
Merriam-Webster’s definitions are not much help:
Viaduct: a long elevated roadway usually consisting of a series of short spans supported by arches, piers, or columns
Bridge: a structure carrying a pathway or roadway over a depression or obstacle
The Oxford English Dictionary has similar definitions:
Viaduct: an elevated structure consisting of a series of arches or spans, by means of which a railroad or road is carried over a valley, road, river, or marshy low-lying ground
Bridge: a structure forming or carrying a road, path, or (in later use) a railroad, etc., which spans a body of water, a roadway, a valley, or some other obstacle or gap, and allows a person or vehicle to pass unimpeded over or across it
Based on these definitions, the features that seem to distinguish a viaduct from a bridge are elevation and short spans. This still doesn’t help solve the question of why the Grant Park structures are viaducts and the Chicago River structures are bridges.
Next, I turned to “How to Read Bridges” by Edward Denison and Ian Stewart. The glossary defines viaduct as “a type of bridge over land formed by a series of small (usually arched) spans.” This definition seems to work best for the viaducts in Chicago. They are over land and have a series of spans, though the spans are not arched.
To further develop my understanding, I paged through the nine examples of viaducts in “How to Read Bridges.” All nine examples are elevated (such as the 330-foot high Goltzsch Viaduct and the 407-foot high Garabit Viaduct) and have multiple arches or piers (such as the 21-arch Glenfinnan Viaduct, the 8-arch Wharncliffe Viaduct, and the 5-pier Busseau Sur Grusse Viaduct). All, but one, have no support system above the road deck. The exception is the Millau Viaduct, which uses a cable-stayed deck on top of seven piers that range from 253 feet to 800 feet tall. All, but one, are over land. The Garabit Viaduct spans the Truyère Valley and one-third of its length crosses the Truyère River. In another example, the approaches to the Cubzac-les-Ponts over the River Dordogne are considered viaducts, but it is a bridge that crosses the river.
I find myself again at a loss. While the definition in this book seems to work for the Chicago viaducts, the examples do not look like the Chicago structures. To help the Chicago viaducts fit in, I propose a new definition built from the three definitions and nine examples above:
Viaduct: an elevated roadway, supported by many arches or piers over land.
Yet, there are exceptions to every rule. The nine examples in “How to Read Bridges” include exceptions to the support system of the viaduct and to the obstacle spanned by a viaduct. Expanding upon this, the Chicago viaducts, which are supported by multiple piers over land, become the exception to the elevated part of the rule or definition.
My biggest take away is that it is no easier to define a viaduct than it is to define a bridge. In most cases, as with bridges, a viaduct is something you know when you see it, even if you cannot define it. However, sometimes it takes a label or a sign, such as the maps of Chicago’s viaducts and, prior to its restoration, the maps of Heth’s Run Bridge, to know what you are seeing.
Lower Hill Redevelopment in the news:
October 8, 2019, Post-Gazette: Lacing the skates: Former Civic Arena redevelopment may be ready to roll
October 9, 2019, Post-Gazette: First wave of ex-Civic Arena site redevelopment would add garage, music and maybe money for Hill projects
October 10, 2019, KDKA: Urban Redevelopment Authority To Vote On Civic Arena Site Plans
October 10, 2019, Tribune-Review: Pittsburgh redevelopment authority postpones vote on construction at Civic Arena site
October 18, 2019, Tribune-Review: Pittsburgh authority gives preliminary OK for development of former Civic Arena site
October 18, 2019, WESA: URA Vote Sets the Stage for Lower Hill Development in Spring 2020
October 18, 2019, WPXI: City board green lights former Civic Arena site redevelopment
October 21, 2019, Arena Digest: Civic Arena Redevelopment Plan Moves Forward
Lower Hill Redevelopment project sites:
Sports and Exhibition Authority
Inspired by my post from this summer, I decided to start a photographic series of Pittsburgh’s Uptown neighborhood. This neighborhood is a hodgepodge of abandoned and renovated townhomes, parking lots, car-oriented businesses, corner stores, industrial uses, and new construction residential buildings. It is predicted to be on a tipping point from being mostly ignored to experiencing intense growth fueled by activities in and around the neighborhood. These activities include:
As these projects move forward, there will likely be more investment and changes to Uptown. This photographic series is intended to capture these changes by revisiting the same sites at regular intervals over the next several years.
In the coming months, I intend to release two related series to record the progress of the CAP and the Lower Hill redevelopment.
The strongest impression from my last trip to Cardiff was the feeling that it is morally wrong to invest heavily in touristy neighborhoods while skipping the neighborhoods of the residents. Tourists may provide a bigger return per touch point, but residents have many more touch points (including voting). Perhaps I have become jaded since that trip, but I now accept that economics and morals rarely work together.
Pittsburgh’s Uptown neighborhood is trying a different approach to see if economic investment can be leveraged for the greater good. Uptown experienced disinvestment and decay for decades, despite being located between and within walking distance of Oakland and downtown, two of the largest economic engines in the state. Not to mention the main roads connecting these prosperous and growing areas run directly through Uptown. Zipping down Fifth Avenue from Oakland to downtown, it is easy to overlook or ignore the ruined home foundations turning back to forest, the wide-spread vacant lots and parking lots, and the intricate architectural details on the remaining old structures.
The bland brick and glass facade on Fifth Avenue identifies this building as another mid-century warehouse. Turning the corner, the decorative parapet wall and bricked over arched opening tell the story of an older, more interesting building.
One such structure was one of the many movie theaters dotting the city in the 1920s. In the 1950s, the adjacent buildings were demolished, and an addition was added to the theater to turn it into a storeroom. After a time as a plasma center in the 1980s and 1990s, the building sat vacant and dusty for many years. Now, it is undergoing renovations for its next life. This is just one of the many signs that investment is coming to Uptown.
The community of Uptown that held on through the economically rough times prepared for this moment. In collaboration with many partners, including local institutions such as Duquesne University and UPMC Mercy as well as the City of Pittsburgh, the community created a new neighborhood plan. This designated Uptown and West Oakland as an EcoInnovation District. One of the first actions from this plan developed a new zoning district, the first progressive zoning district in Pittsburgh. The goal of the plan and the zoning district is to leverage the coming economic investment to create an inclusive and environmentally sustainable neighborhood.
It will be interesting to watch this neighborhood over the next few years to see if the plans are successful at introducing some moral components to the economic investment.
The first place to show me how a city can be stacked like a layer cake, Chicago provided ample opportunities to explore all levels of the city. The experience of noticing the expansion joints in roads that I assumed were on solid ground opened my eyes to the possibilities of stacking uses.
A vacant lot two stories below street level solved the mystery of the expansion joints, by exposing the inner guts. Two more roads sit below street level to segregate trash pick-up and deliveries from the flow of traffic. These lover levels also provide some opportunities for parking without monopolizing valuable real estate above. Retail shops connected by pedestrian passageways are also interspersed in these layers.
At the same elevation as the “underground life,” the Chicago River flows through the heart of the city. On and along the river are a variety of activities. Pedestrian paths, cafes, housing, parks, industrial uses, and homeless encampments line the shores. Meanwhile, the river abounds with ducks, boat tours, water taxis, construction staging, and marinas.
Back up on the street level, life buzzes. Vehicular and pedestrian traffic rush passed, occasionally pealing off to visit the numerous shops, offices, museums, restaurants, cafes, parks, and trails.
Yet, more life looms above. Several of the skyscrapers have penthouse, or nearly penthouse, restaurants. Others have rooftop observation platforms. Between these and the street are many other opportunities for enjoying life including a religious sanctuary, the “L”, gardens, art, pedestrian bridges, and of course, offices, apartments, hotel rooms, and shops.
Unlike Pittsburgh, in Chicago, the public is welcome in some form on every level to gain a full experience of the city.
Last summer’s search for Roebling bridges (see Market St, Steubenville and Wheeling Suspension Bridge) came to a successful end as a golden sunset spread over Cincinnati. The reason we struck out earlier in the day is that the Cincinnati-Covington Bridge is one of the two remaining Roebling suspension bridges. The other is, of course, his most famous bridge: the Brooklyn Bridge. The first of Roebling’s five suspension bridges was built in Pittsburgh at the site of the current Smithfield Street Bridge, but lasted less than 40 years before the increased river and road traffic made it obsolete.
Between Roebling’s two remaining bridges, I found the Cincinnati bridge more appealing. Its character feels like it would fit right in on the Thames in London. I also appreciated the engaging green spaces at either end. The birds liked this bridge, too.
Sunset from the Roebling Bridge
urbantraipsing 