Why Thompson Peak Parkway Narrows Inside DC Ranch and When That Ends

Westbound on Thompson Peak Parkway, somewhere between E. Desert Camp Drive and E. Windgate Pass Drive, four lanes become two. The road crosses Reata Wash on a single bridge, and everyone driving or cycling that stretch shares it. On the far side the road opens back up, as though the squeeze never happened.

The narrowing reads like an engineering compromise. It's actually an unpaid half of a deal. DC Ranch built its share of this crossing in 2000. The City of Scottsdale's share, a second span for westbound traffic, was in the original design and never got built. On September 22, 2026, the City Council finally put that missing bridge under contract. The cost is well above what voters approved in 2019, and the city expects construction to run about a year starting this fall.

A Half Street Built in 2000

In the city's own telling, the bridge was always meant to come in pairs. Scottsdale's project page for the Thompson Peak Parkway Bridge says that when DC Ranch was built, the city and the developer signed an agreement. The developer would design both Thompson Peak Parkway bridges over Reata Wash but build only one, because the new community didn't yet produce enough traffic to justify two.

City minutes from an August 7, 2025 Paths & Trails Subcommittee meeting fill in the rest. In 2000, DC Ranch built the eastbound bridge as a "half street improvement" for its development. The original design also included a westbound bridge to be built by the City of Scottsdale. The minutes record plainly that it "did not come to fruition."

So the existing span has carried traffic in both directions for 26 years, though it was designed for one. The city's project page says that as the area grew and traffic warranted it, Scottsdale was obligated to build the second bridge. That obligation got a funding line in the 2019 bond election as Question 2, Community Spaces and Infrastructure, Project 62: "Build a Bridge on Thompson Peak Parkway Bridge over Reata Pass Wash to Improve Safety."

The squeeze itself is specific. According to the city, the four travel lanes and two bike lanes on Thompson Peak Parkway narrow to two travel lanes and two bike lanes over the existing bridge. Transportation Director Alison Tymkiw's staff report, quoted by Scottsdale Progress, describes the same merge and calls the second bridge a way to complete Thompson Peak Parkway "to its ultimate cross-section and improving safety." The city also points to growing bicycle traffic as part of what made the single bridge a safety concern for drivers and cyclists.

The Bill Came In Above the Bond

The 2019 bond figure is the baseline. Voters approved $6.3 million for this bridge. The low bid Council took up this fall, from Ames Construction, came in at about $8 million. Scottsdale Progress put it this way: bond project No. 62 "appears to be barreling far north of the original estimate."

The pieces fit together like this:

The construction contract alone runs about $1.79 million, or roughly 28 percent, above the bond allocation. The full project budget is more than double what voters set aside. The city's project page says most of the funding came from the 2019 bond and the rest from the 0.2% Transportation Sales Tax.

There's a twist. At the September 17, 2026 Transportation Commission meeting, staff said the bids had come in below the engineering estimate, according to a Citizen Portal account of that meeting. Both statements hold at once. Against the city's current estimate, the bid looks good. Against the 2019 bond figure, it's expensive. The sources don't break down why the price grew, and the city is covering the difference by adding sales-tax money to the bond funds.

Council approved the contract on its consent agenda on Tuesday, September 22, 2026. Scottsdale Signal previewed the vote as an $8 million bridge contract.

What Actually Gets Built Over Reata Wash

The new span is designed to match the 2000 bridge rather than stand apart from it. Here is what the August 2025 subcommittee minutes and the city's project page describe:

• Two 12-foot westbound travel lanes, mirroring the existing bridge
• A five-foot bike lane and a five-foot sidewalk, with a barrier between the sidewalk and traffic
• A metal design feature in place of wood, chosen for durability while keeping the existing bridge's look, as staff described it to the Transportation Commission on September 17
• A public art component and minor improvements to the current bridge, both in the scope of the contract
• A noise study during design, to decide whether a noise wall or other mitigation was needed

Once the new bridge opens, the 2000 bridge becomes eastbound only and westbound traffic moves to the new span. The city says the finished pair will give Thompson Peak Parkway a continuous four-lane road with bike lanes from Scottsdale Road to 100th Street, and will improve access to nearby parks. The subcommittee minutes also list multiuse and trail network connectivity as a project goal, and say the design will be coordinated with DC Ranch to handle where pedestrians and vehicles meet and how path and trail connections tie in.

So the crossing gains more than lane count. The 2000 bridge has been splitting its deck between two directions of cars, bikes, and people on foot. Once the second span opens, each bridge carries one direction, and the westbound sidewalk sits behind a barrier.

The Timeline So Far

The bridge has moved faster in the past 14 months than in the previous 25 years:

Taken together, the city's fall 2026 start window and roughly 12-month construction period point to completion around fall 2027. That's an estimate built from the city's own numbers. Scottsdale hasn't published a firm finish date.

What the City Hasn't Published Yet

As of early October 2026, several details that matter for a daily commute aren't public:

1. An exact start date. The October start comes from staff's comments to the Transportation Commission before Council voted. The city project page, last updated August 28, 2026, still says only "fall of 2026."
2. Lane restrictions, closures, or detours. Neither the project page nor the Council agenda describes phasing, work hours, or how traffic will move during construction. The city's traffic restrictions page was last updated May 21, 2026, and listed a Chaparral Road restriction, not Thompson Peak Parkway.
3. Sidewalk and trail impacts while work is underway. The design goals cover path and trail connections after completion. No published source says what happens to them during construction.
4. What the noise study found. The minutes say a noise study would determine whether a noise wall or other mitigation is needed. They don't record the result.

There's also a second project to keep in view. The city's separate Pima Road project from Happy Valley Road to Jomax Road covers about a mile of reconstruction, bike lanes, sidewalks and trails, and drainage work. Its page lists a construction start of Winter 2026 and completion in Summer 2027. That schedule was last updated January 22, 2026, so it's a planned overlap with the bridge work, not a confirmed one. Anyone whose regular route runs north on Pima toward Jomax could end up dealing with both projects in the same months.

The Reata Wash crossing is the last piece of a road whose final shape was set when DC Ranch's first bridge went in. The city's half has been owed since 2000, and the contract approved on September 22, 2026 sets its price at $8,085,461.26.

If you're weighing a home in Desert Camp or elsewhere along Thompson Peak while the bridge is going up, or thinking about how a year of construction fits into your listing timeline, Brent Votroubek can walk you through what's confirmed, what's still pending, and how it plays into your plans. Let's Connect.