WASHINGTON -- Despite the National Park Service's best efforts, Lincoln Memorial's newly reconstructed Reflecting Pool has filled with green algae.

WTOP-FM reported on the problem last week, noting that the NPS was "boosting the amount of ozone added in the filtration stage, and have already seen the water quality improve."

The reflecting pool underwent a $34 million reconstruction that concluded in August, which included building a new foundation in addition to a filtration and drainage system that circulates water to and from the Potomac River.

As The Washington Post reported Tuesday:

[B]ecause the pool is a smaller and shallower water source, the algae cells bloom more easily there.

"This is a direct consequence of the fact that this is a green project," [NPS spokeswoman Carol] Johnson said. "The conditions are pretty good for algae, once it gets in there."

There are no water-quality, health or safety concerns because of the buildup of algae, and the pumping and circulation system is working properly, Johnson said.

Once ozone levels in the pool are fine-tuned, the NPS plans a one-time removal of the algae, much of which has died and sunk to the bottom of the pool, the Post reported.

Also on HuffPost:

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  • September 1, 2012 -- Ian writes: "This was a planned outing to go see the recently redone reflecting pool upgrades. I was partly hoping for a good sunset with pre-Isaac clouds. Instead, some storms bubbled up around sunset and continued to form into the early night. After taking refuge in the memorial I darted out into the lighter rain behind the storm and this was a 'lucky' shot--first of 2 from this angle before I pointed the camera toward the Washington Monument and Capitol."

  • People (including a ton of Boy Scouts) run for cover as a storm hits D.C. with a leading edge of strong winds in July 2010.

  • August 11, 2012 -- Ian writes: "A wall cloud underneath a strong (previously severe warned) storm passing south of Thurmont, Md. We were northwest of Walkersville and southwest of Woodsboro at the time this was shot."

  • A thunderstorm in June 2012, as seen from Cleveland Park in the District of Columbia.

  • This tornado dropped from the clouds near La Crosse, Kan., just after 10 p.m. on May 25, 2012.

  • Capital Bikeshare bikes in the snow on Jan. 11, 2011.

  • Double rainbow over Glover Park in the District of Columbia.

  • A man skiing in D.C. during 2010's "Snowmageddon" storm

  • Rain during a July 2010 storm in Cleveland Park in the District of Columbia.

  • An iconic shot of the newly rebuilt and refilled Reflecting Pool on Sept. 1, 2012.