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Rock or concrete protective armour
Look up riprap in Wiktionary, the free dictionary. Riprap (in North American English), also known as rip rap, rip-rap, shot rock, rock armour (in British
Riprap
Natural phenomenon
weakening the overall riprap, the side slope of the bank being too steep for the riprap to resist the displacing forces, or gradation of riprap being too uniform
River_bank_failure
Ridge or wall to hold back water
engineering Honeycomb sea wall Hudson's equation KOLOS Mole Pier Revetment Riprap Seawall Tetrapod Training wall Van der Meer formula Wave-dissipating concrete
Levee
Anti-flooding structure
Coastal bulkheads are most often referred to as seawalls, bulkheading, or riprap revetments. These manmade structures are constructed along shorelines with
Bulkhead_(barrier)
Nuclear reactor that killed 3 people in 1961
SL-1 burial site in 2003, capped with riprap
SL-1
Erosion of sediment near bridge foundations by water
while riprap, gabions, articulated concrete blocks and grout-filled mattresses can mechanically stabilize the pier and abutment slopes. Riprap remains
Bridge_scour
Defunct cemetery in Philadelphia, Pennsylvania, US
tombstones. Many of the remaining headstones, and the monument, were used as riprap during the construction of the Betsy Ross Bridge and can be seen on the
Monument_Cemetery
Cultural theme park in Baguio, Philippines
traditions and folklore. The park gained attention for its distinctive riprap-style stone walling and for representing elements of Igorot culture. It
Igorot_Stone_Kingdom
Harbor in San Mateo County, California
Pillar Point Harbor is a boat harbor created by a riprap breakwater in San Mateo County, California, immediately north of Half Moon Bay. It is used by
Pillar_Point_Harbor
Structures designed to absorb energy
to prevent damage during periods of floods or heavy seasonal rains (see riprap). Many materials may be used: wooden piles, loose-piled boulders or concrete
Revetment
Sub-discipline of civil engineering
Riprap lining a lake shore
Hydraulic_engineering
1987 bridge collapse in Montgomery County, New York
footing was not filled with riprap stone, but instead was back-filled with erodible soil and topped off with dry riprap. Riprap protection, inspection, and
Schoharie Creek Bridge collapse
Schoharie_Creek_Bridge_collapse
Species of mammal
Pyrenees National Park examined changes in desman populations before and after riprap reinforcement of the banks of the Gave d'Aspe in the Aspe Valley. The works
Pyrenean_desman
Suspension bridge in Kobe, Japan
a thickness of 2 m in a range of 10 m around the caisson, covered with riprap of 8 m thick. The bridge has three spans. The central span is 1,991 m (6
Akashi_Kaikyo_Bridge
Practice of preventing soil erosion in agriculture and land development
land that is being used by people. One way that this is done is by placing riprap or gabions along the bank. Examples of erosion control methods include the
Erosion_control
Association of surface rocks with stream beds or beaches
hydrological armor occurs naturally; however, a man-made form is usually called riprap, when shorelines or stream banks are fortified for erosion protection with
Armor_(hydrology)
Equation in coastal engineering
an equation used by coastal engineers to calculate the minimum size of riprap (armourstone) required to provide satisfactory stability characteristics
Hudson's_equation
Major river in central United States
The Missouri River near New Haven, Missouri, looking upstream – note the riprap wing dam protruding into the river from the left to direct its flow into
Missouri_River
2002 murder in Modesto, California, US
Bay in Richmond. The following day, a jogger spotted a human torso in the riprap along the shoreline of Point Isabel Regional Park, approximately one mile
Murder_of_Laci_Peterson
United States historic place
in three stepped sections. Below the bridge in the river is visible some riprap, stone remnants of the old bridge's abutments and central pier. The bridge
Morey_Memorial_Bridge
Suspension bridge in New York City
towers were to fail. According to MTA officials, piles of rocks (known as riprap) around the towers' bases would ground a stray ship before it could hit
Verrazzano–Narrows_Bridge
Form of coastal defence
them to become undermined. Mound Mound type seawalls, using revetments or riprap, are used in less demanding settings where lower energy erosional processes
Seawall
Former amusement park in New Orleans, Louisiana, United States
general public, having been deemed hazardous due to underwater drop offs and riprap which pose dangers for swimmers. Water quality had increased dramatically
Pontchartrain_Beach
Lighthouse in Connecticut, U.S. (1902)
of rocks from the excavation of Radio City Music Hall were added to the riprap foundation. The light was added to the National Register of Historic Places
Greens_Ledge_Light
Shoreline management based on sustainability principles
Vegetated riprap is a soft shoreline engineering technique that is an alternative to conventional riprap for erosion protection. Conventional riprap is a form
Soft_engineering
United States historic place
Hurricane Katrina destroyed the marina in 2005. The fort is now protected by riprap. It needs structural stabilization to reverse the previous damage. In February
Fort_Macomb
Changes to a shoreline by accretion and erosion
with cemented walkway, mud revetment stabilized with grass, and gravel riprap armament at the base. Groynes are the walls perpendicular to the coastline
Beach_evolution
National Scenic Byway in Shenandoah National Park, Virginia, US
142.6 Horsehead Overlook 90.0 144.8 Calvary Rocks Overlook 91.4 147.1 Riprap Overlook Albemarle 92.0 148.1 Moormans River Overlook Augusta 92.6 149
Skyline_Drive
Public university in Philadelphia, Pennsylvania, US
a monument to George Washington and Marquis de Lafayette, were used as riprap for the Betsy Ross Bridge. This land is now an athletic field, student recreation
Temple_University
Headland on the east coast of England
erosion and methods to protect the coast. Protection includes a sea wall, a riprap, groynes and a permeable groyne as well as drainage. The cliff at the Naze
The_Naze
American poet (born 1930)
Han Shan; this work appeared in chapbook form in 1959, under the title Riprap & Cold Mountain Poems. Snyder met Allen Ginsberg when the latter sought
Gary_Snyder
Cemetery in Rockledge, Montgomery County, Pennsylvania
new grave sites. The majority of the remaining headstones were used as riprap during the construction of the Betsy Ross Bridge and can be seen on the
Lawnview_Memorial_Park
island in river sometimes connected to west bank by mud flat accreted by riprap. Arkansas Louisiana Texas 33°1′9″N 94°2′35″W / 33.01917°N 94.04306°W
List of tripoints of U.S. states
List_of_tripoints_of_U.S._states
Lighthouse in Maryland, United States
shaking from ice floes. This lens was replaced, and the additional piles and riprap were placed around the foundation in order to protect it. By 1964 it was
Thomas_Point_Shoal_Light
Type of artificial dam
include concrete overtopping protection systems, timber cribs, sheet-piles, riprap and gabions, Reinforced Earth, minimum energy loss weirs, embankment overflow
Embankment_dam
Island in New York City
the 100-year flood plain, and replacing the old sea wall with a layer of riprap to better mitigate wave action. A 2023 study found that Governors Island
Governors_Island
Suspended passenger train operated by Via Rail between Montreal and Gaspé, Quebec
2024), and Port-Daniel-Gascons to Gaspé (which will begin in 2023 with riprap work along the line).[needs update] The tracks this train operated on have
Montreal–Gaspé_train
Building in San Francisco, California, United States
dislike the building because it was irregularly shaped. A smaller, cheaper riprap was completed by the end of 1935. A guard tower and a catwalk from Hill
Model_Industries_Building
River in north western Iran
above Maku, forming the Maku-Barun reservoir. The dam is rammed earth and riprap with a clay lining 78 metres (256 ft) high, impounding some 135,000,000
Zangmar_River
Concrete breakwater element
playing at with the dolos?). Wikimedia Commons has media related to Dolosse. Riprap Humboldt Bay – Bay on the North Coast of California – jetties were reinforced
Dolos
Moving mudpot near Niland, California
to be sunk to a depth of 400 feet (120 m) to hit gas. They also dumped riprap into the western edge, pumped surface water away at a rate of 40,000 gallons
Niland_Geyser
Category 5 Atlantic hurricane in 2005
storm surge along the dam, which caused $20 million worth of damage to the riprap, or support structure. Operators released water levels by 4 ft (1.2 m) to
Hurricane_Rita
Dark-colored, fine-grained, non-granitic igneous rock
used as ballast for railroad track bed and hydraulic engineering rock (riprap) in coast and bank protection for paving embankments. It is also used for
Trap_rock
Concrete breakwater element
wind on open waterPages displaying short descriptions of redirect targets Riprap – Rock or concrete protective armour Seawall – Form of coastal defence Shoal –
Tetrapod_(structure)
Tributary of the Los Angeles River
under West Greenleaf Boulevard, it changes to an earth-bottom section with riprap banks. Joined near its end by East Compton Creek, the creek ultimately empties
Compton_Creek
Mathematical expression for the stability of rocks in water currents
November 2023 – via TU Delft Repository. Verhagen, H.J.; Mertens, M. (2010), "Riprap stability for deep water, shallow water and steep foreshores", Coasts, marine
Izbash_formula
United States historic place
site is not known. It is known that additional panels may be protected by riprap laid along the river bank; these panels are also sometimes protected from
Bellows_Falls_Petroglyph_Site
Island in British Columbia, Canada
pool area to facilitate tidal flushing; and upgrading 250 metres of rock riprap along the foreshore to protect against erosion due to waves caused by Fraser
Kirkland_Island
Interface between land and a river or stream
Riparian-zone restoration – Ecological restoration of river banks and floodplains Riprap – Rock or concrete protective armour Várzea forest – Seasonal floodplain
Riparian_zone
Area-denial weapon
blocks shaped like caltrops, which interlock when piled up. They are used as riprap in the construction of breakwaters and other sea defences, as they have
Caltrop
Building in Manhattan, New York
began on June 20, 1923. Because the site was mostly artificial fill with riprap buttressing, water from the Hudson River sometimes leaked through to the
Barclay–Vesey_Building
Lighthouse in Maryland, United States
in 1884 and 1894, leading to the piling of 790 cubic yards (600 m3) of riprap around the piles. The light was automated in 1949, and fell into disrepair
Seven_Foot_Knoll_Light
Underground warehouse in Kansas, U.S.
2 km) south of downtown Atchison, Kansas. Initially, the company produced riprap for the Chicago, Burlington and Quincy Railroad, one of several railroads
Atchison_Storage_Facility
Nyren and crew build a farmer's wall across the old driveway opening and a riprap retaining wall at the bank cut for the new drive, and landscaper Roger Cook
List of This Old House episodes (seasons 11–20)
List_of_This_Old_House_episodes_(seasons_11–20)
Bridge in Solana, Cagayan
painting of the landmark structure and the construction of the grouted riprap and the road approaches. First Lady Imelda Marcos opened the bridge to vehicular
Buntun_Bridge
Vehicle used for carrying cargo or passengers on a rail transport system
wagon). Side dump cars: used to transport roadbed materials such as ballast, riprap, and large stone, and can unload anywhere along the track. Tippler (UK):
Railroad_car
Coastal town in Suffolk, England
includes beach nourishment, new groynes on the south side of the pier and riprap to the north. It is overlooked by brightly painted beach huts. The fictional
Southwold
Natural gas pipeline in Canada
itself, construction activities near and around waterways like blasting and riprap armouring could harm the fish population. According to the Canadian Broadcasting
Coastal_GasLink_pipeline
State park in Hampden County, Massachusetts
Civilian Conservation Corps worked in the watershed from 1935 to 1937, adding riprap to the reservoir, planting trees, and creating roads, trails, and pedestrian
Chicopee_Memorial_State_Park
Park and stream restoration project
of Little Sugar Creek became hidden by houses, factories, parking lots, riprap, highways, and culverts. The stream also became very polluted by runoff
Little_Sugar_Creek_Greenway
Lighthouse in New York, United States
southern end of Kingsland Point Park. A 100-foot (30 m) pedestrian bridge and riprap breakwater connects it to the shore. To its immediate east is a large residential
Tarrytown_Light
Development Co. Acquired by WP&YR in 1901. Last used in 1927. Placed as riprap in Yukon River at Whitehorse, Yukon in 1931. Machinery recovered from river
List of steamboats on the Yukon River
List_of_steamboats_on_the_Yukon_River
Irreversible transformation of energy into forms less capable of doing work
like small waterfalls or cascades, where water flows vertically or over riprap to lose some of its kinetic energy. Important examples of irreversible processes
Dissipation
River in the U.S. state of New York
creek was realigned and reshaped for approximately 1,056 feet (322 m) and riprap was added where needed. The existing channel of the creek was slightly reshaped
Mohawk_River
Reservoir in Kansas, United States
elevation. Cedar Bluff Dam is a rolled earth-fill embankment dam with rock riprap on its upstream face. It has a structural height of 202 feet (62 m) and
Cedar_Bluff_Reservoir
Underwater vortex
identified by the Dutch, who observed kolks hoisting several-ton blocks of riprap from dikes and transporting them away, suspended above the bottom. The Larrelt
Kolk_(vortex)
Beach in the U.S. state of Massachusetts
County survey of 1880. Portions of the shore have been stabilized with riprap to deter further erosion. Most of this work was done immediately after Hurricane
Popponesset_Spit
Broken stone (very course aggregate) used in hydraulic engineering
Lagasse, P. F.; Clopper, P. E.; Zevenbergen, L. W.; Ruff, J. F. (2006). Riprap design criteria, recommended specifications, and quality control. NCHRP
Armourstone
materials but also for decorative purposes. Today, it is mainly used to make riprap, such as blocks for the dikes of the ports of Saint-Raphaël and Fréjus,
Esterellite
Textile material used in ground stabilization and construction
seawalls, under precast concrete erosion control blocks, beneath large stone riprap, and in other erosion control situations. He used different styles of woven
Geotextile
Reservoir in Pennsylvania, United States
weir that discharges into a concrete lined stilling basin and then into a riprap lined earth channel. The lake was drained in March 2013 after deficiencies
Meadow_Grounds_Lake
granite and volcanic rocks have been quarried locally for road base metal, riprap, armour stone and asphalt, although the main purpose now is for concrete
Geography_of_Hong_Kong
1930–1935 industrial disaster in the U.S. state of West Virginia
Dark Secrets of Johnson & Johnson. First edition. Random House, 2025. "RIPRAP: A screening and conversation with David Kelley". UCI Claire Trevor School
Hawks_Nest_Tunnel_disaster
United States historic place
(about 1,000 feet (300 m)) consisting of earthen embankments lined with riprap and puddle clay. Near its center is a spillway area consisting of a series
Mystic_Dam
Pit to allow surface waste water to drain
zone such as sand. Simple dry wells consist of a pit filled with gravel, riprap, rubble, or other debris. Such pits resist collapse but do not have much
Dry_well
Swiss mechanical engineer
For example, Strickler's equation has been used to estimate n-values for riprap lined channels from stone gradation. The equation also describes the scaling
Albert_Strickler
Concrete breakwater element
Placing with a crane Monitoring Breakwater (structure) Erosion control Riprap Artificial reef Coastal erosion Ocean surface wave Seawall KOLOS Xbloc MEDUS
Accropode
Navigation structures in Michigan, United States
piers are stone filled timber cribs, each 24 feet wide and 100 feet long Riprap is placed on both sides of the crib. Inland of the cribs, the remaining
Navigation Structures at Saugatuck Harbor
Navigation_Structures_at_Saugatuck_Harbor
Pacific typhoon in 2024
losses due to the flooding. Soil erosion occurred in Baguio, damaging a riprap. Strong winds impacted Olongapo, toppling electrical poles. A downed tree
Typhoon_Gaemi
American composer (born 1991)
f(x) = xsin2x+x (2010) Circadian Rhythm (2011) Tidalwave Kitchen (2012) Riprap (2013) for marimba and string orchestra Tumblebird Contrails (2014) Rust
Gabriella_Smith
Conjoined islands in New York City
as being present across the island. The island is surrounded by piles of riprap or rocks. By the 19th century, the southern end of Wards Island was known
Randalls_and_Wards_Islands
City in New York, United States
able to secure grants from the state's Environmental Protection fund for riprap to stabilize the shoreline. In the early 1960s, city manager Joseph McDowell
Newburgh,_New_York
Mixed-use development in Calgary, Alberta, Canada
engineering of polders, Quarry Park was built with an insulated, reinforced riprap berm designed to withstand a one-in-100 year flood event. Other precautions
Quarry_Park
Natural freshwater lake in Florida, United States
drainage canals, raising the levee to 31 feet (9.4 m), covering it with riprap, and extending it further around the lake, and lowering the control level
Lake_Okeechobee
Canal in Washington, D.C., and Maryland
gully without a culvert, a sudden lowering of the towpath, or the signs of riprap on the towpath or the gully itself. Many of these (e.g. the one at Pennyfield
Chesapeake_and_Ohio_Canal
Kenneth Rexroth (One Hundred Poems From the Chinese, 1956) and Gary Snyder (Riprap and Cold Mountain Poems, 1959, which includes translations of Hanshan).
Classical_Chinese_poetry
Structure that lowers elevation of water in a controlled fashion
30 m) to 10 feet (3.0 m). These structures are built by creating a slope of riprap, which consists of large boulders or less commonly, blocks of concrete.
Drop_structure
Shoreline defense
wind on open waterPages displaying short descriptions of redirect targets Riprap – Rock or concrete protective armour Seawall – Form of coastal defence Spătaru
Wave-dissipating concrete block
Wave-dissipating_concrete_block
British wave-dissipating concrete armour unit for breakwaters
concrete needed than Tetrapods". Accropode Dolos Tetrapod (structure) Xbloc Riprap K. Y. Singh's 1968 paper credits "Mr. Ridehalgh, a partner in his firm and
Stabit
Bridge connecting Philadelphia and New Jersey
construction, thousands of headstones from historic Monument Cemetery were used as riprap on the embankments built for the bridge, some of which can be seen along
Betsy_Ross_Bridge
Gothic *rukka Derivatives: enrocar[v], rocar[v], 'to spindle', enrocamento 'riprap' saco, sacola = bag, sack, rucksack sacar = to snap, to extract, to snatch
List of Portuguese words of Germanic origin
List_of_Portuguese_words_of_Germanic_origin
Preventing flooding and erosion of shorelines
This is generally used to absorb wave energy and hold beach material as riprap does. Often referred to as titan tubes as manufactured by Flint Technical
Coastal_management
State park in Washington, U.S.
built for long-defunct fish hatcheries—from Cornet Bay and Bowman Bay. Riprap was also removed from Bowman Bay beach. These artificial features had been
Deception_Pass_State_Park
Subfamily of snakes
forests, whereas Plagiopholis are apparently found in grasses, bushes, and riprap. Pseudoxenodon eat frogs and lizards and Plagiopholis eat earthworms. Plagiopholis
Pseudoxenodontinae
the shoreline, the Chicago Department of Transportation announced that riprap would replace the beach to stabilize the shoreline. Howard Beach lies in
List_of_beaches_in_Chicago
Reservoir in Polonnaruwa
strengthening the embankment, repairing its protective stone pitching (riprap), improving drainage at the downstream toe, and addressing seepage problems
Parakrama_Samudra
Former island prison in San Francisco Bay
slide. This prompted a series of changes to the structures on the island. A riprap was built around the Model Industries Building, it was strengthened, and
Alcatraz_Federal_Penitentiary
Tributary of the San Gabriel River in California
described as being either concrete-lined, "composite," trapezoidal, or riprap. After having crossed the Los-Angeles–Orange County border three times,
Coyote Creek (San Gabriel River tributary)
Coyote_Creek_(San_Gabriel_River_tributary)
Dam in Utah, United States
earthfill dam type containing 15,500 cubic yards (11,900 m3) of earth, rock and riprap materials. The crest of the dam is at 4,908.0 feet (1,496.0 m), is 30 feet
Pineview_Dam
2019 aviation accident in Alaska
6-to-8-foot-high (1.8 to 2.4 m) yellow diamond shaped road sign, and again struck rock riprap as the plane came to a halt. This caused the port-side (left) propeller
PenAir_Flight_3296
travel, tourism, insurance
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