principal spillway examples pdf - harford county, md
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Elements of
Stormwater Maintenance
HARFORD COUNTY GOVERNMENT
DEPARTMENT OF PUBLIC WORKS
DIVISION OF HIGHWAYS & WATER RESOURCES
Page 1 (Rev 4/2010)
PRINCIPAL SPILLWAY
DAM STRUCTURE
DOWNSTREAM DAM SLOPE
UPSTREAM DAM SLOPE
TOP OF DAM
Page 2 (Rev 4/2010)
EMERGENCY SPILLWAY
SAND FILTER WITH SEDIMENT MARKER
Page 3 (Rev 4/2010)
WATER QUALITY FACILITY
Page 4 (Rev 4/2010)
SEEPAGE THROUGH PIPE JOINT
BARREL DEFLECTION
Page 5 (Rev 4/2010)
HOLE IN BOTTOM OF BARREL
Page 6 (Rev 4/2010)
CRACK THROUGH A CONTROL WEIR WALL
HONEYCOMBING
Page 7 (Rev 4/2010)
PIPING
Page 8 (Rev 4/2010)
STORM DRAIN OBSTRUCTION
Page 9 (Rev 4/2010)
STORM DRAIN SEDIMENT DELTA
Page 10 (Rev 4/2010)
DEWATERING PIPE OBSTRUCTION
DEWATERING STONE – AT BASE OVERGROWN
Page 11 (Rev 4/2010)
ANIMAL BURROWING
(causing dam to slide)
Page 12 (Rev 4/2010)
SCOURING BELOW RIP RAP PROTECTION
PILOT CHANNEL
Page 13 (Rev 4/2010)
SLUMP
SLIDING
Page 14 (Rev 4/2010)
LEANING/BROKEN FENCING
Page 15 (Rev 4/2010)
SEDIMENT ACCUMULATION AT CURB OPENING
GATE VALVE
Page 16 (Rev 4/2010)
GILLESPIE SAND FILTER BOX
Page 17 (Rev 4/2010)
SCALING
SPALLING
Page 18 (Rev 4/2010)
INLET OBSTRUCTION
CARTRIDGE VAULT
Page 19 (Rev 4/2010)
RISER PROTECTION
(New design effective May 5, 2010)
SEEPAGE THROUGH RISER WALL
Page 20 (Rev 4/2010)
DETERIORATED CONCRETE IN RISER
ACCESS ROAD – SPARSE STABILIZATION
Page 21 (Rev 4/2010)
STORMCEPTOR
(Rumsey Island)
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