ARKANSAS & LOUISIANA LEVEE AND DRAINAGE DISTRICTS MEETINGS Rodney Nordby Vicksburg District Red River Projects Office Bossier City, LA. 25-26 January 2017
AGENDA - Types of Inspections - Levee Maintenance - Common Deficiencies Found During Inspections - Regulatory Requirements - Semiannual Reports - Contact Information - Questions
TYPES OF INSPECTIONS USACE conducts two types of levee inspections. Routine inspections are conducted every year on each levee segment. These inspections are conducted by the Red River Projects Office personnel. Periodic inspections are conducted every five years on each levee segment. These inspections are conducted by Vicksburg District HQ personnel with assistance of Red River Projects personnel.
INSPECTION CHECKLISTS GENERAL ITEMS: - Operations & Maintenance Manuals - Emergency Supplies & Equipment - Flood Preparedness & Training LEVEE EMBANKMENTS: - Unwanted Vegetation Growth - Sod Cover - Encroachments - Closure Structures - Slope Stability - Erosion / Bank Caving - Settlement - Depressions / Rutting - Cracking - Animal Control - Culverts / Discharge Pipes - Riprap Revetments & Bank Protection - Revetments Other Than Riprap - Underseepage Relief Wells / Toe Drains - Seepage ROUTINE INSPECTIONS
INSPECTION CHECKLISTS PERIODIC INSPECTIONS GENERAL ITEMS: 9. Culverts / Discharge Pipes 1. Operations & Maintenance Manuals 10. Sluice / Slide Gates 2. Emergency Supplies & Equipment 11. Flap Gates / Flap Valves / Pinch Valves 3. Flood Preparedness & Training 12. Trash Racks LEVEE EMBANKMENTS: 13. Other Metallic Items 1. Unwanted Vegetation Growth 14. Riprap Revetments of Inlet / Discharge Areas 2. Sod Cover 15. Revetments Other Than Riprap 3. Encroachments PUMP STATIONS (if applicable): 4. Closure Structures 1. Operating, Maint, Training & Inspection Records 5. Slope Stability 2. Operations & Maint Equipment Manuals 6. Erosion / Bank Caving 3. Safety Compliance 7. Settlement 4. Communications 8. Depressions / Rutting 5. Plant Building 9. Cracking 6. Fencing & Gates 10. Animal Control 7. Pumps 11. Culverts / Discharge Pipes 8. Motors, Engines, Fans, Gear Reducers, etc. 12. Riprap Revetments & Bank Protection 9. Sumps / Wet Well 13. Revetments Other Than Riprap 10. Mechanical Operating Trash Racks 14. Underseepage Relief Wells / Toe Drains 11. Non-Mechanical Trash Racks 15. Seepage 12. Fuel System for Pump Engines INTERIOR DRAINAGE SYSTEM (if applicable): 13. Power Source 1. Vegetation & Obstructions 14. Electrical Systems 2. Encroachments 15. Megger Testing on Pump Motors / Power Cables 3. Ponding Areas 16. Enclosures, Panels, Conduit & Ducts 4. Fencing & Gates 17. Intake & Discharge Pipelines 5. Concrete Surfaces 18. Sluice / Slide Gates 6. Tilting, Sliding or Settlement of Concrete 19. Flap Gates / Flap Valves / Pinch Valves 7. Foundation of Concrete Structures 20. Cranes 8. Monolith Joints 21. Other Metallic Items
INSPECTION CHECKLISTS PL 84-99 CHECKLIST LEVEE EMBANKMENTS (Routine & Periodic Inspections): - Encroachments - Closure Structures - Slope Stability - Erosion / Bank Caving - Animal Control - Culverts / Discharge Pipes - Underseepage Relief Wells / Toe Drains INTERIOR DRAINAGE SYSTEM (Periodic Inspection Only): - Culverts / Discharge Pipes - Sluice / Slide Gates - Flap Gates / Flap Valves / Pinch Valves PUMP STATIONS (Periodic Inspection Only): - Intake & Discharge Pipelines - Sluice / Slide Gates - Flap Gates / Flap Valves / Pinch Valves - Riprap Revetments & Bank Protection
LEVEE MAINTENANCE Fence crossing is perpendicular to levee slope and free of woody growth and vegetation. Gate is well constructed and operational.
LEVEE MAINTENANCE Trees and crops are kept a minimum of 15 from levee toes. Levee slopes are mowed and well maintained. Crown of levee is graded and has a gravel travel surface.
LEVEE MAINTENANCE Outlet has a flap gate with a positive seal and adequate scour protection is provided for structure. Structure has been videoed within 5 years and no deficiencies noted in video.
LEVEE MAINTENANCE Inlet is free of obstructions and adequate scour protection is provided for structure. Structure has been videoed within 5 years and no deficiencies noted in video.
LEVEE MAINTENANCE Ramp crossing parallel to levee crown. Ramp is constructed external to the levee net section and has a good travel surface.
LEVEE MAINTENANCE Ramp crossing perpendicular to levee crown. Ramp is constructed external to the levee net section and has a good travel surface.
COMMON DEFICIENCIES UNWANTED VEGETATION GROWTH: Trees and brush located within 15 of landside or riverside toes.
COMMON DEFICIENCIES ENCROACHMENTS: Utility poles and fence lines located within 15 of landside or riverside toes.
COMMON DEFICIENCIES ENCROACHMENTS: Utility crossing that penetrate the net section of the levee embankment.
COMMON DEFICIENCIES CLOSURE STRUCTURES: Original closure structure is damaged and inoperable. Sponsor needs to develop an alternate gap closure plan.
COMMON DEFICIENCIES SLOPE STABILITY: Slide located on riverside slope of levee, approximately 100 in length.
COMMON DEFICIENCIES EROSION / BANK CAVING: Area where severe caving and erosion is occurring on slope and crown. Portions of the crown are missing due to severe and active erosion and bank caving in this area.
COMMON DEFICIENCIES DEPRESSIONS / RUTTING: Ramp crossing levee embankment. Ramp penetrates the net section of the levee by approximately 24 in depth.
COMMON DEFICIENCIES ANIMAL CONTROL: Bull rub located on landside levee slope. Vertical face is approximately 3 high.
COMMON DEFICIENCIES ANIMAL CONTROL: Cattle walk damage on riverside levee slope, approximately 24" in depth.
COMMON DEFICIENCIES CULVERTS / DISCHARGE PIPES: No scour protection on inlet of structure. No video inspection performed in last 5 years.
MVK BEST MANAGEMENT PRACTICES UTILITIES: - Power poles must be located a minimum of 40 from toe of levee. - Overhead utility lines crossing the levee must have the following clearance: * 0-750 volts 18 minimum clearance * 750-15,000 volts 20 minimum clearance * 15,000-50,000 volts 22 minimum clearance - Buried utility lines not penetrate the net section of the levee and must have a minimum of 2 of cover over utility line. - Buried utilities must have a 1V-10H slope in Arkansas and a 1V-20H in Louisiana if perpendicular to levee, and a 1V-20H slope if parallel to levee in both states.
MVK BEST MANAGEMENT PRACTICES STRUCTURES: - All structures must be video inspected every 5 years. This video inspection must be forwarded to the Vicksburg District HQ for evaluation. RAMPS: - Ramp must be constructed external to the net section of the levee. - Ramp must have a minimum of 1V-10H slopes.
SEMIANNUAL REPORTS Semiannual reports from the levee sponsor are due to the Vicksburg District HQ in January and July of each year. The report shall cover the inspection, maintenance and operation of the protective works during the period covered in the report.
CONTACT INFORMATION Red River Projects Office 276 Miller Road Bossier City, Louisiana 71112 Rodney Nordby Civil Engineer Technician Work: (318) 549-3000 Ext 3 Cell: (318) 393-0199 rodney.r.nordby@usace.army.mil
QUESTIONS?