Enterprise Products Partners is a rock-solid dividend stock.Enterprise Products Partners (EPD -0.47%) offers investors a lucrative passive income stream. The master limited partnership's (MLP) distribution currently yields around 7%. That's several times higher than the S&P 500's 1.3% dividend yield. That high-yielding payout is on an increasingly strong foundation, which was clear in the MLP's second-quarter report.Strength all around"Enterprise reported a solid second quarter in terms of both volumes and ...