Get a daily rundown of the top stories on Urban Milwaukee

How do you landscape the area around an 840-square-foot building that sits at a foot of a bridge and abuts a railroad, with little land of its own? For a century the answer was, “you don’t!” and that is what transpired at the old Chicago & North Western Railway Interlocking Tower located at the foot of N. Jefferson St. in the Historic Third Ward.

This was true urban grit, just blocks from Downtown, on a riverfront jammed with warehouses, and C&NW Swing Bridge #1556 that spun back and forth accommodating the conflicting demands of maritime vessels and the northwest-bound trains emanating from the nation’s busiest railroad hub, 90 miles to the south, in Chicago.

But in a move that would have been surprising even a decade ago, landscaping will now adorn the property to the west of this tiny building in the form of the $1.2 million Trestle Park, as my colleague Jeramey Jannene reported in July. (“Eyes on Milwaukee: Trestle Park Will Cost $1.2 Million“)

The primary beneficiary of the landscaping will be the public, which for the first time will have safe and legal access to the 40-foot-by-150-foot railroad trestle, and the proposed greenspace between it and the DoMUS apartment building that is half again as large. All is to be rehabilitated and decked with greenery, seating and walking areas according to the plans drawn by Jim Shields of HGA Architects. It’s a miniature version of New York City’s catalytic High Line Park, Jannene reported Whitney Gould saying..

Home Owned for 25 Years

The secondary beneficiary will be Gregory Martin, an independent design professional, now in his early 50s, who has owned this improbable morsel of a building ever since buying it from the railroad for $16,200 in 1991. According to a Milwaukee Journal Sentinel article of March 5th, 1995, Martin first encountered the vacant structure in February, 1989 wandering through what was then a deserted neighborhood while taking pictures of old buildings. (“‘It’s a habit of mine,’ he says.”) This one captured his heart:

On an open stretch along the river he spied “this tall thin building” standing near some train tracks that led out toward a railroad turnbridge. He stopped his car and started photographing. He remembers that his heart was pounding. “If you can fall in love with a building, that’s what I did,” he says, laughing.

Martin spent years doing the rudimentary work of converting a railroad building into a passable (if small) studio and residence. He patched the roof, later upgrading it to steel from the original asphalt shingles, and added skylights.

He installed plumbing and an interior staircase. Both were firsts for the building. According to the article:

“It was Siberia down here, but I loved it,” he says. “I cooked in an electric wok and washed dishes outside with a hose. You’d be surprised what you can cook in a wok.”

The Assessor Pays a Visit

Of course, the new construction obliged the Assessor to pay a visit to the tiny property so it would pull its proper weight on the tax rolls of this town. The bread and butter of the assessment business lies in “comparable sales” — the many thousands of ordinary, more-or-less similar, and frequently identical residential units that make up the bulk of the city’s taxable property.

Determining value is relatively easy when the property in question is a Bungalow, or Ranch House, since so many change hands in arms-length transactions, but when the residence in question is a former Interlocking Tower for the Chicago & North Western Railway, the Assessor must dig deep into the well of his training to come up with a fair market value. This is complicated by the fact that there are likely fewer than 100 of these buildings remaining nationwide. With the exception of this one, none of the few towers to have been restored appear to be in residential use.

This did not deter our much-suffering public servant. You can see the gears spinning as the assessor addresses the pros and cons of this building in his field notes from 1995:

Roof new. Brick needs tuckpointing. Concrete sills very deteriorated. Very small lot is “remnant” size and directly up against tracks. First floor is galley kit., 3/4 bath, table space refrig. and stack washer dryer under stairwell. Up is all studio area with a sleeping loft tucked under coved ceiling. Possibilities are severely limited by small amount of space available and owner’s funds. No closets or storage space. Walls are about 18 inches thick. Nice view from 2nd floor, though.

“Nice” view? Even in 1995, with the surrounding area desolate and worth maybe $5 million in total, Martin effused about the view in his Journal Sentinel interview:

“There are always seagulls flying around. Outside my window I’ve got a 360 view of downtown, the river, the Allen-Bradley clock, the 3rd Ward, the Hoan Bridge, Summerfest, you name it.”

Soon, the view will include one of the most intensively detailed small outdoor spaces in the city — a $1.2 million park that will grace the setting of this small building, now appraised at $15,000 and its 3,750 square foot lot, which is valued at $112,500.

Financing will come from the $20 million Erie Jefferson Riverwalk Tax Incremental Financing District 56, created in 2004. At that time the assessed value of the district, which runs along the east bank of the river from the Broadway Bridge to the lake, was about $10 million. In 2015, following the construction of new buildings, and the rehabilitation of old ones, the district’s assessed valuation stood at $127,731,400.

The Home Today

The home today appears to be every bit the construction site that it has been for the past 26 years. The improvements visible from the outside include new windows and doors, with the potential for a nice deck on the river. The majority of the site consists of a parking lot. To the east the Riverfront Pizzeria Bar & Grill occupies a portion of the old Hansen Storage building. Access to the Riverwalk lies between the two buildings, and a portion of the future Trestle Park is accessible beyond. Landscaping is observed in the breech, with vines and junk plants obscuring the view of the river. The building has a disconcerting feature consisting of a glass door on the second floor with no stairs leading to it. Formerly the exterior stairway here was the only access to the switching room above. When the owner incorporated an interior staircase, he was surprised to find that the rebar on the second floor consisted of rails, such as those that the C&NW trains rode as they passed this building for decades.

What is an “Interlocking Tower”?

When the subject in question is any aspect of railroading, the researcher can always be confident that somebody out there is an expert who is positively consumed with the topic under investigation, no matter how obscure.

Thanks to NorthAmericanInterlockings.com , where such passion is shown for structures like this, we learn that “the first interlocking machine is credited to Sirwho is also the inventor of the [railway] semaphore. His original installation at Bricklayers’ Arms Junction [England] in 1843 was the first time an ‘arrangement of switch, lock and signal appliances so interconnected that their movements must succeed each other in pre-determined order’ was ever used.”

The apparatus prevents “conflicting movements through an arrangement of tracks such as junctions or crossings,” according to one definition.

The goal was safety, and the orderly operation of the rails. The systems were absolutely crucial when a single track carried trains in both directions.

In other words, the Interlocking Machine was a sort of circuit board, albeit one that required musclepower to operate the many switches and levers that comprised a system. The Interlocking Towers were usually located at busy bottleneck points or railroad junctions. Here is a video of one in operation.

When Was it Built?

City of Milwaukee records date this building to 1900, but that seems like just a guess, especially since this structure does not appear on a 1910 map. The 1995 Journal Sentinel article suggested the building dated to 1927, but did not offer a citation. More likely the structure dates to 1915 when the C&NW RR Swing Bridge #1556 was constructed, replacing an 1898 bridge that carried traffic between Chicago and the Twin Cities and beyond. Prior to the construction of the bridge, temporary tracks were laid to divert the traffic to the north. The old bridge was cut from its moorings, and floated to its new location, while the present structure was constructed in situ. Upon completion, trains then ran on the new bridge, and the old was abandoned and dismantled. Traffic was disrupted for only a few hours.

Photo Gallery

The Rundown

Owner: Gregory Martin

Location: City of Milwaukee

Neighborhood: Historic Third Ward

Subdivision: None Found. Complicated riparian site.

Year Built: According to City: 1900; However building most likely dates to construction of adjacent bridge in 1915, according to Engineering News November 26, 1915, p. 1051. Structure does not appear on maps of 1894 and 1910.

Architect: Unknown. Originally built as an Interlocking Tower for the Chicago & North Western Railway serving Railroad Swing Bridge #1556

Style: Neoclassical

Size: 840 square feet of finished living area, but due to 18″ thick walls, probably less interior space. Lot size: 3,750 square feet

Fireplaces: None

Bedrooms: None. A sleeping loft beneath rafters

Bathrooms: “3/4 Bath” (Shower only, no tub.)

Rec Room: No

Assessment: Land: 3,750 square foot lot is valued at $112,500 ($30.00/sq. ft.). Improvements: $15,000. Total assessed valuation: $127,500.

Taxes: $4,484.96. Includes $1,186.45 in “Special” charges for Delinquent City Services ($289.25), Delinquent Stormwater fees ($179.08), DNS Miscellaneous fees ($507.00) and BID#2 assessment ($211.12) Paid on the installment plan

Garbage Collection Route and Schedule: N/A

Polling Location: Frank P. Zeidler Municipal Building, 841 N Broadway

Aldermanic District: 4th Robert Bauman

County Supervisory District: District 5th Marcelia Nicholson

Walk Score: 81 out of 100. “Very Walkable” Most errands can be accomplished on foot. City Average: 62 out of 100.

Transit Score: 59 out of 100. “Good Transit” Many nearby public transportation options. City average: 49 out of 100.

Photos 1993, 1995

How Milwaukee Is It? The residence is one mile south of Milwaukee City Hall