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Harmar Township is a township in Allegheny County, Pennsylvania, United States. It contains the communities of Acmetonia, Harmarville, Harmar Heights, and Chapel Downs. The population was 3,136 at the 2020 census. The township was named after Harmar Denny, a U.S. congressman and son of Ebenezer Denny.

The BladeRunners Ice Complex was a group of ice hockey rinks and sports facilities which were located in Western Pennsylvania.

Allegheny Islands State Park is a 43-acre (17 ha) Pennsylvania state park in Harmar Township, Allegheny County, Pennsylvania in the United States. The undeveloped park is composed of three alluvial islands located in the middle of the Allegheny River northeast of Pittsburgh. The islands are just north of the boroughs of Oakmont and Plum, and southwest of Cheswick. Bridges for the Pennsylvania Turnpike (Interstate 76) and the Bessemer and Lake Erie Railroad Branch of the Canadian National Railway cross the Allegheny River at the middle island.

The Allegheny River Turnpike Bridge carries Interstate 76 (Pennsylvania Turnpike) over the Allegheny River. The structure features a pair of twin 2,350’ cast-in-place concrete segmental bridges. This is the first of its type in Pennsylvania. It was constructed between 2007 and 2010 and is the second bridge to stand on this site. The original truss bridge was built between 1949 and 1951 by the engineering firm Modjeski & Masters; the crossing predates the Interstate System by several years. The replacement bridge was designed by the engineering firm Figg and built by Walsh Construction. The purpose of the new structure was to increase the capacity of traffic from two lanes in each direction to three; this was done to eliminate a bottleneck at the exit with Pennsylvania Route 28, which branches off at the bridge approach on the Harmar side of the river.[1] The replacement eastbound bridge opened in November 2009. It carried both eastbound and westbound traffic across the Allegheny River until the project was finished one year later. On Tuesday, July 13, 2010, just after 10 a.m., the old steel structure of the Allegheny River Bridge was imploded with controlled demolition explosives. Roadway traffic was stopped for approximately 15–20 minutes, and river traffic was stopped for 24 hours for cleanup of the debris from the bridge.

The Bessemer & Lake Erie Railroad Bridge is a truss bridge that carries the Canadian National Railway's Bessemer and Lake Erie Railroad division across the Allegheny River between the Pittsburgh suburbs of Plum and Harmar Township, Pennsylvania. In 1897, a single-track trestle and viaduct was built on this site; in 1918, the original piers were doubled in width, the current double-tracked structure built alongside, and then slid into place. The original north trestle approach was buried in slag dumped from an adjacent temporary filling trestle.

The Allegheny Valley School District is a small, suburban, public school district located in Allegheny County, Pennsylvania. It covers Cheswick and Springdale boroughs and Harmar and Springdale townships in Allegheny County, Pennsylvania. The district encompasses approximately 10 square miles (26 km2). According to 2000 federal census data, it serves a resident population of 10,771 people. In 2009, the district residents’ per capita income was $22,071, while the median family income was $45,562. In the Commonwealth, the median family income was $49,501 and the United States median family income was $49,445, in 2010.

Deer Creek is a tributary of the Allegheny River located in both Allegheny and Butler counties in the U.S. state of Pennsylvania.

Acmetonia is a community within Harmar Township, Allegheny County, Pennsylvania, United States. Acmetonia Primary School as well as the Allegheny Valley School District administrative offices are located on Pearl Avenue in Acmetonia. The natural southern boundary of Acmetonia is the Allegheny River and the primitive Allegheny Islands State Park is nearby. The community is served by the Cheswick post office with the ZIP code of 15024.

The 1951 PGA Championship was the 33rd PGA Championship, held June 27 to July 3 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh. Sam Snead won the match play championship, 7 & 6 over Walter Burkemo in the Tuesday final; the winner's share was $3,500 and the runner-up's was $1,500.It marked the first time the PGA Championship returned to a venue; Oakmont had hosted in 1922 (at the time, it had also hosted two U.S. Opens and three U.S. Amateurs). It was the third and final win for Snead in the PGA Championship, and the fifth of his seven major titles. At age 39, he was the oldest at the time to win the PGA Championship, passing his old record of two years earlier. Burkemo won the title in 1953 and was runner-up again in 1954. Defending champion Chandler Harper lost in the first round to Jim Turnesa in a match that went to 23 holes. Turnesa, the runner-up to Snead back in 1942, won the title following year in 1952, and displaced Snead as the oldest champion by a few months. Snead's win was the last by a former champion for twenty years, until Jack Nicklaus won his second PGA Championship in 1971. Claude Harmon, Lloyd Mangrum, and Pete Cooper tied for the lowest score in the stroke play qualifier at 142 (−2). Harmon won the $250 medalist prize on the third hole of a sudden-death playoff.The British Open in 1951 was held in the first week of July in Northern Ireland. Its mandatory two-day qualifier was held the same days as the PGA's semifinals and finals, which prevented participation in both events.

The 1978 PGA Championship was the 60th PGA Championship, played August 3–6 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh. John Mahaffey won his only major championship in a sudden-death playoff over Jerry Pate and Tom Watson.Watson led the tournament each day and held a five-shot lead after 54 holes, but he faltered on Sunday with a 73 (+2) in his best opportunity for a PGA Championship, the only major he has never won. Pate had a four-foot (1.3 m) putt for a par and the victory on the 72nd hole, but it lipped out. After opening with a four-over 75 on Thursday, Mahaffey rebounded to go 12-under for the next three rounds, including a five-under 66 in the final round to gain the seven strokes on Watson. He had a history of hard luck in majors: at the U.S. Open, he lost the 18-hole playoff in 1975 and was the 54-hole leader in 1976, won by tour rookie Pate. Mahaffey broke that streak when he birdied the second extra hole to win the playoff at Oakmont. It was the second of three consecutive playoffs at the PGA Championship. Like Arnold Palmer, Watson won numerous majors but never the PGA Championship, the only leg missing for a career grand slam. At this time he had won three of his eight majors; his next best finish at the PGA Championship came fifteen years later in 1993, placing fifth at Inverness. Pate finished in the top five for the third straight year (and would again the next year) but never won another major. Jack Nicklaus, age 38, shot a 79 in the first round and missed the cut by five strokes in one of his worst performances in a major. Four-time champion Nicklaus was a pre-tournament favorite: in his previous majors at Oakmont (two U.S. Opens), he won in 1962, his first major and first win as a professional, and tied for fourth in the 1973. At the previous year's PGA Championship at Pebble Beach, he finished third, one stroke out of the playoff. This was the eighth major held at Oakmont and its third PGA Championship; the previous two in 1922 and 1951 were match play events.

The 2007 United States Open Championship was the 107th U.S. Open, held June 14–17 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh.Ángel Cabrera won his first major championship, one stroke ahead of runners-up Jim Furyk and Tiger Woods, who were unable to birdie the 72nd hole to force a Monday playoff. Cabrera's victory marked the first U.S. Open won by an Argentine or a South American. It was the first of his two major titles; he won the Masters in a playoff in 2009. This was the eighth U.S. Open and eleventh professional major held at Oakmont.

The 1994 U.S. Open was the 94th U.S. Open, held June 16–20 at Oakmont Country Club in Oakmont, Pennsylvania, a suburb northeast of Pittsburgh. Ernie Els, age 24, won the first of his four major titles on the second sudden-death hole to defeat Loren Roberts, after Colin Montgomerie was eliminated in an 18-hole playoff. (Both Roberts and Montgomerie were winless in major championships, but each won several senior majors while on the Champions Tour.) It was the seventh U.S. Open and tenth major held at Oakmont, and was Arnold Palmer's final U.S. Open as a participant.