State Road 666 - Tom Stuart Causeway / 150th Avenue

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Following 150th Avenue and Madeira Beach Causeway, State Road 666 totals 1.39 miles between SR 699 (Gulf Boulevard) and U.S. 19 Alternate. The four-lane boulevard spans the Intracoastal Waterway across a draw bridge and ends at a three-wye interchange with Seminole Boulevard on the Seminole city line at Bay Pines. Historically the route was an east-west branch of State Road 699.

This 1975 map excerpt shows State Road 666 as State Road 699 along Madeira Beach Causeway.
Florida State Road 666 East
An eastbound reassurance marker stands along 150th Avenue just beyond the intersection with SR 699 (Gulf Boulevard). 150th Avenue constitutes a commercial strip to Boca Ciega Bay. Photo taken 06/14/14.
Madeira Way angles between SR 666 and 699 through what could be considered Downtown Madeira Beach. Photo taken 08/15/15.
Eastbound mileage sign posted along SR 666 as the four-lane boulevard leaves Madeira Way. Control points feature destinations along U.S. 19 Alternate. Photo taken 08/15/15.
2 photos
2 photos
Several marinas line Tom Stuart Causeway leading to the Intracoastal Waterway bridge across Boca Ciega Bay. Photos taken 08/15/15.
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2 photos
The four-lane draw bridge across the Intracoastal Waterway was built in 1962. Photos taken 08/15/15.
Just east of the bridge is the intersection with Duhme Road (Pinellas County Road 321). CR 321 follows Duhme Road north to 113th Street North (New Bridge Road) into Seminole. Photo taken 08/15/15.
2 photos
2 photos
SR 666 east expands to three lanes as overheads attached to a 1974-built pedestrian bridge direct motorists to U.S. 19 Alternate. The left two lanes join the left side of U.S. 19 Alternate (Seminole Boulevard) north through the city of Seminole to Clearwater. Photo taken 12/21/03. Second photo taken 08/15/15.
A two-lane ramp carries motorists from the ending SR 666 east onto U.S. 19 Alternate (Bay Pines Boulevard) south to Bay Pines and St. Petersburg. Beyond this interchange, U.S. 19 Alternate runs east and north as a commercial arterial. Photo taken 08/15/15.
The three-wye interchange between SR 666 and U.S. 19 Alternate (SR 595) was built in anticipation of canceled plans involving an expressway through Seminole and Largo. Photo taken 08/15/15.
The ramp to U.S. 19A northbound merges onto Seminole Boulevard on the left side. Photo taken 08/15/15.
Florida State Road 666 West
A left side ramp takes drivers from U.S. 19 (Seminole Boulevard) south onto SR 666 (Tom Stuart Causeway) west. The ramp carries two lanes initially. Photo taken 08/15/15.
Two lanes join SR 666 west from U.S. 19 north to expand the state road to six lanes below a pedestrian bridge serving two adjacent schools. There is no shield for SR 666 in this direction otherwise. Photo taken 08/15/15.
Duhme Road arcs northwest from SR 666 (Madeira Beach Causeway) north to become 113th Street North at 54th Avenue North. The arterial runs north through the city of Seminole. Photo taken 08/15/15.
A four-lane draw bridge takes SR 666 across the Intracoastal Waterway. The Intracoastal Waterway follows Boca Ciega Bay southward to Tampa Bay at Tarpon Key and northward to Travatine Island at Indian Shores. Photo taken 08/15/15.
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2 photos
A $2.8-million maintenance project started in summer 2015 involved restoration of concrete support beams and the bridge foundation, repairing the bridge deck and work on the bridge tender house. Work on the 1962-opened bridge ran through fall 2016.1 Photos taken 08/15/15.
Madeira Way branches west from SR 666 (150th Avenue) to Gulf Boulevard opposite Archibald Memorial Beach Park. A number of store fronts line the short boulevard. Photo taken 08/15/15.
SR 666 west transitions from Tom Stuart Causeway onto 150th Avenue to its conclusion at SR 699 (Gulf Boulevard) in Madeira Beach. Photo taken 12/21/03.
The shield assembly for SR 699 posted along 150th Avenue west was skewed to face the adjacent parking lot by summer 2014. Photo taken 06/14/14.
SR 699 takes Gulf Boulevard north from Madeira Beach to Redington Beach, North Redington Beach, Redington Shores and Indian Shores. Photo taken 06/14/14.
SR 666 (150th Avenue) ends at SR 699 (Gulf Boulevard) opposite the Ocean Sands condominium complex. Public parking is available just to the north at Archibald Memorial Beach Park. Photo taken 06/14/14.
SR 699 presently runs south from Madeira beach to Treasure Island, St. Pete Beach and SR 682 (Pinellas Bayway) ahead of Pass-A-Grille Beach. 2014 discussion involved turning the state road over to local control. Photo taken 06/14/14.

  1. "Upgrades planned for Tom Stuart Causeway Bridge." Beach Beacon (Tampa Bay), July 22, 2015.

Photo Credits:

  • 12/21/03 by Justin Cozart.
  • 06/14/14 by AARoads.
  • 08/15/15 by AARoads.

Connect with:
U.S. 19 Alternate
State Road 699 - Gulf Boulevard

Page Updated 08-15-2015.

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