Question:  The Jesse Stuart Memorial Bridge and the Greenup Lock and Dam are located how far from Pittsburgh? 

Context paragraphs:
Varney's Falls Dam: Varney's Falls Dam is a historic lock and dam structure located on the James River near Gilmore Mills, Botetourt County, Virginia.  It was built in 1851, and is a massive limestone structure.  The lock chamber measures 100 feet long between gate recesses, 15 feet wide, and approximately 21 feet from the top on the upriver end to ground level.  Associated with the lock are the lock and dam abutment structures, the remaining towpaths, canal bed, berm bank, towpath culvert and remnants of a towpath bridge.  The dam was destroyed in 1881, and the lock gates removed in 1885.

Montgomery Locks and Dam: Montgomery Locks and Dam is a lock and dam on the Ohio River, located 32 miles downstream of Pittsburgh.  There are two locks, one for commercial barge traffic that's 600 feet long by 110 feet wide, and the recreational auxiliary lock is 360 feet long by 56 feet wide.  Montgomery locks averages about 300 commercial lock throughs every month and 150 lock throughs a month on the recreational auxiliary lock.  The average cost to keep the lock and dam operationally ready averaged $5.8 million per year from the years 2010-2014.

Lacey V. Murrow Memorial Bridge: The Lacey V. Murrow Memorial Bridge is one of the Interstate 90 floating bridges that carries the eastbound lanes of Interstate 90 across Lake Washington from Seattle to Mercer Island, Washington.  Westbound traffic is carried by the Homer M. Hadley Memorial Bridge running parallel to it.  The Lacey V. Murrow Memorial Bridge is the second-longest floating bridge on Earth at 6620 ft , whereas the longest is the Governor Albert D. Rosellini Bridge—Evergreen Point just a few miles to the north on the same lake, opened 76 years later.  The third-longest is the Hood Canal Bridge, also in Washington State, about 30 miles to the northwest of the Evergreen Point Floating Bridge.

Jesse Stuart Memorial Bridge: The Jesse Stuart Memorial Bridge is a viaduct bridge on top of the Greenup Lock and Dam on the Ohio River.  The bridge, named after author and Greenup County, Kentucky native Jesse Stuart, was completed in 1984 and carries Kentucky Route 10 (unsigned) from the AA Highway/U.S. Route 23 intersection to the bridge itself, where it becomes State Route 253 to U.S. Route 52.  The Ohio approach has a ramp to a rest area operated by the Ohio Department of Transportation.  There is also a park on the Kentucky side of the bridge, which is open for fishing and recreation.  This park is operated by the United States Army Corps of Engineers.  Both facilities, and the bridge itself, were briefly closed after the September 11 attacks due to terrorism concerns since they are all part of the Greenup Locks and Dam complex.  They have since reopened; however, access to the observation platforms on both sides of the dam is no longer permitted.

Ohio State Route 253: State Route 253 (SR 253, OH 253) is a very short east–west state highway in the southern part of the U.S. state of Ohio.  With an overall length of just 0.56 mi , the majority of SR 253 is a part of the Jesse Stuart Memorial Bridge, which crosses over the Ohio River near Franklin Furnace, Ohio.  The western terminus of SR 253 is at about the midspan of the bridge, where it crosses the Kentucky State Line and becomes Kentucky Route 10 (KY 10).  The eastern terminus of the highway is at a diamond interchange with U.S. Route 52 (US 52) near the eastern landing of the Ohio River crossing.  The current SR 253 was established in the late 1980s.  However, an earlier version of the highway existed in the Medina vicinity from the early 1920s until the late 1950s.

Marion Memorial Bridge: The Marion Memorial Bridge was a 4-span metal truss bridge which formerly carried U.S. Route 41 in Marion County, Tennessee.  It was built in 1929.  The main span was 369 feet, and the bridge had a total length of 1870 feet.  The bridge was historic, and the Marion Memorial Bridge was listed on the National Register of Historic Places on October 25, 2007.  The bridge featured an unusual truss configuration that is a hybrid of the Parker and K-Truss configurations.  This bridge crossed the Tennessee River and Nickajack Lake.  The bridge was replaced by a new concrete and box girder span which opened in November 2014, slightly delayed from its original completion date of August 2013 by conditions encountered in the construction of the replacement bridge footings.  Since the construction of the new bridge's footings would involve blasting within 30 feet of the Marion Memorial Bridge, state officials closed the bridge to vehicle and pedestrian traffic on January 9, 2012, with traffic being re-routed to the Interstate 24 bridge south of the span.  All of the metal trusses of the bridge were demolished and removed by June 2015.  The bridge was delisted from the National Register in June 2016.

Kentucky Route 10: Kentucky Route 10, also known as KY 10, is a highway maintained by the Kentucky Transportation Cabinet that runs from Alexandria, Kentucky (a suburb of Cincinnati, Ohio) to the Jesse Stuart Memorial Bridge at Grays Branch, roughly north of Greenup, Kentucky, where the route continues into Ohio as State Route 253.

Lock and Dam No. 15: Lock and Dam No. 15 is a lock and dam located on the Upper Mississippi River.  It spans the river between Rock Island, Illinois and Davenport, Iowa.  Lock and Dam 15 is the largest roller dam in the world, its dam is 1203 ft long and consists of nine 109 ft non-submersible, non-overflow roller gates and two 109 ft non-submersible overflow roller gates.  It is unusual among the upper Mississippi River dams in that it has only roller gates, has different sizes and types of roller gates, it is not perpendicular to the flow of the river and is one of the few facilities that has a completed auxiliary lock.  The main lock is 110 ft wide by 600 ft long and its auxiliary lock is 110 ft wide by 360 ft long.  In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 15 Historic District, #04000175 covering 3590 acre , 2 buildings, 9 structures, and 1 object.

Lock and Dam Number 53: Lock and Dam 53 was the 20th lock and dam upstream from the confluence of the Ohio River and the Mississippi River.  It was located 962 miles downstream from Pittsburgh.  Lock and Dam 53 had two locks for commercial barge traffic, one that was 1,200 feet long by 110 feet wide, the other 600 feet long by 110 feet wide.  The lock will be demolished and Olmsted Lock and Dam will replace it.

Greenup Lock and Dam: Greenup Lock and Dam is the 11th Lock and dam on the Ohio River, located 341 miles downstream of Pittsburgh.  There are 2 locks, one for commercial barge traffic that's 1,200 feet long by 110 feet wide, and the auxiliary lock is 600 feet long by 110 feet wide.

Supporting paragraphs: Jesse Stuart Memorial Bridge Greenup Lock and Dam
Answer: 341 miles