Rock Creek Park
— National Park Service, U.S. Department of the Interior —Peirce Mill Dam was completed in 1906 to create a scenic waterfall on Rock Creek. Since its construction, the dam has prevented spawning herring and other migratory and resident fish from swimming further upstream. A Denil fishway was installed in 2006 to provide fish access to the upper reaches of the creek. This fishway consists of a series of baffles inserted into a concrete channel. The channel passes between the stone walls located on the east side of the dam. The baffles act like rungs in a ladder. Now the fish can swim from level to level up and over the dam. Arrows point to the fishway entrance and exit. This fishway and the removal or alteration of other obstacles has restored the "Herring Highway", the ancestral spawning route of Blueback herring and Alewife.Pierce Mill is 4.4 miles upstream from the Potomac River.Rock Creek meanders 33 miles from its source in Montgomery County, Maryland through suburban and densely populated urban areas until it reaches the Potomac River. From there the water continues to flow southeast 112 miles to the Chesapeake Bay and another 80 miles to the Atlantic Ocean.
|Placed By||Chesapeake Bay Gateways Network-Alice Ferguson Foundation-Woodrow Wilson Bridge Project|
|Marker Condition||No reports yet|
|Date Added||Tuesday, October 7th, 2014 at 7:01am PDT -07:00|
|UTM (WGS84 Datum)||18S E 322155 N 4312170|
|Decimal Degrees||38.94045000, -77.05201667|
|Degrees and Decimal Minutes||N 38° 56.427', W 77° 3.121'|
|Degrees, Minutes and Seconds||38° 56' 25.62" N, 77° 3' 7.26" W|
|Driving Directions||Google Maps|
|Closest Postal Address||At or near 2569-2599 Tilden St NW, Washington DC 20008, US|
|Alternative Maps||Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap|
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