Florida State Road 666
|Tom Stuart Causeway / 150th Avenue|
|Maintained by FDOT|
|Length:||1.391 mi (2.239 km)|
|West end:||SR 699 in Madeira Beach|
US 19 Alt. in Seminole
State Road 666 (SR 666) is a short state road in Pinellas County. Locally known as Tom Stuart Causeway, the route crosses Boca Ceiga Bay from Seminole to Madeira Beach. The bridge crossing Boca Ceiga Bay is a Bascule Drawbridge with 11 spans. The route ends with an interchange with Alternate US 19 in Bay Pines(originally built for the formerly proposed Pinellas Belt Expressway). The southwestern terminus of the route is at State Road 699 in Madeira Beach, in front of the Ocean Sands hotel.
The entire route is in Pinellas County.
|Madeira Beach||0.000||0.000||SR 699 (Gulf Boulevard) – Redington Beaches|
|Tom Stuart Causeway over Boca Ciega Bay (Gulf Intracoastal Waterway)|
|0.887||1.427||Duhme Road (CR 321 north)|
|Seminole||1.2||1.9||Exit to school (EB only)|
US 19 Alt. (SR 595) – Seminole, Clearwater, St. Petersburg
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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