Dam Safety Inspection Checklist

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Allan Morrison
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1 Dam Safety Inspection Checklist Complete All Portions of This Section (Pre-inspection) Date of Inspection: Name of Dam: EAP: (yes, no) OM&I: (yes, no) File Number: Review Inventory - Highlight missing information (Pre -inspection) Owner=s Name(s): Address: City: State: Zip (+4): Telephone (Home): Contact Person: Designed By: Constructed By: Year Completed: Purpose of dam: Interview with Owner (at the site): Owner/Representative present: (Yes, No) Telephone (Work): Telephone: Plans Available (Yes, No) (location): Name(s): Double check address, telephone #, purpose (check ->) G How long have you owned dam - previous name/owner? EAP/OM&I: up-dated-(yes, no) & location: Operate lake drain (times per year, accessibility): Mowing (times per year): Prior problems (wet areas, erosion, slides): Repair or modification (what & when): Failure/Incident/Breach (max. pool): Downstream hazard status (recent changes): Do you know the in-depth details of the construction of your dam? (If yes - ask next three questions, if no - go to Field Information Section) Core trench material and location: Volume of fill (earth or rock) in dam: Foundation (earth or rock) of dam: Field Information (while at site) Pool Elevation (during inspection): Time: (a.m. p.m.) Site Conditions(temp., weather, ground moisture): Inspection Party: Maximum Height: Normal Pool Surface Area: (measured or inventory appears correct) (measured or inventory appears correct)

2 UPSTREAM SLOPE Gradient: Horizontal: Vertical: (est, meas.) VEGETATION [no problem] Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Brush: Quantity: (sparse, dense) (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) SLOPE PROTECTION [no problem, could not inspect thoroughly] Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Wave Berm: Vegetation: (adequate, bare, sparse, improper vegetation) Concrete Slabs: (cracked, settlement, undermined, voids, deteriorated, vegetation) Other: EROSION [no problem, could not inspect thoroughly] Wave Erosion (Beaching): Scarp: Length: Height: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Runoff Erosion (Gullies): Quantity: Depth: Width: Length: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) INSTABILITIES [no problem, could not inspect thoroughly] Slides: Transverse Length: Longitudinal Length: Scarp: Width: Length: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Crack: Width: Notes/Causes Depth: Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

3 Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) OTHER [no problem, could not inspect thoroughly] Rodent Burrows: (few, numerous) (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Ruts: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Other: CREST Length: Width: (est, meas.) VEGETATION [no problem] Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Brush: Quantity: (sparse, dense) (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) EROSION [no problem, could not inspect thoroughly] Runoff Erosion (Gullies): Quantity: Depth: Width: Length: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

4 ALIGNMENT [no problem, could not inspect thoroughly] Vertical: Low Area: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Elevation Difference: Length: Horizontal: WIDTH [no problem] Too Narrow (adj. to structure, entire crest, lt end, rt end, middle, see dwg) INSTABILITIES [no problem, could not inspect thoroughly] Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) OTHER [no problem, could not inspect thoroughly] Rodent Burrows: (few, numerous) (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Ruts: (adj. to structure, entire crest, lt end, rt end, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Other: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

5 DOWNSTREAM SLOPE Gradient: Horizontal: Vertical: (est, meas.) VEGETATION [no problem] Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Brush: Quantity: (sparse, dense) (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) EROSION [no problem, could not inspect thoroughly] Runoff Erosion (Gullies): Quantity: Depth: Width: Length: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) INSTABILITIES [no problem, could not inspect thoroughly] Slides: Transverse Length: Longitudinal Length: Scarp: Width: Length: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Crack: Width: Notes/Causes Depth: Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Cracks: Transverse Longitudinal Other Quantity: Length: Width: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Bulges Depressions Hummocky Size: Height: Depth: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

6 OTHER [no problem, could not inspect thoroughly] Rodent Burrows: (few, numerous) (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Ruts: (adj. to structure, entire slope, lt end, rt end, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Other: SEEPAGE [no problem, could not inspect thoroughly] Wet Area Flow Boil Sinkhole Flow Rate Aquatic Vegetation Rust Colored Deposits Sediment in Flow Other: Wet Area Flow Boil Sinkhole Flow Rate Aquatic Vegetation Rust Colored Deposits Sediment in Flow Other: Size: Size: EMBANKMENT DRAINS [none, none found, no problem, could not inspect thoroughly] Type: Toe Drain Relief Wells Other: Flow Rate: Size: Number: MONITORING INSTRUMENTATION [none, none found, no problem, could not inspect thoroughly] Found Piezometers Weirs/Flumes Other Periodic Inspections by: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

7 PRINCIPAL SPILLWAY GENERAL INLET [no problem, could not inspect thoroughly] Anti-Vortex Plate [] Dimensions: (adequate, too small,) Type: (steel, concrete, aluminum, stainless steel, corrugated metal wood, other): Deterioration: (missing sections, rusted, collapsed) Flash Boards [] Type: (metal, wood): Deterioration: Trashrack [] Opening Size: (adequate, too small, too large) Type: (metal bars, fence, screen, concrete, baffle, other): Deterioration: (broken bars, missing sections, rusted, collapsed) INLET OBSTRUCTION [no problem, could not inspect thoroughly] Debris: (leaves, trash, logs, branches, ice) Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (entire inlet, lt side, rt side, middle, see dwg) Brush: Quantity: (sparse, dense) (entire inlet, lt side, rt side, middle, see dwg) Other:(beaver activity, trashrack opening too small, partially/completely blocked, i.e.) INLET MATERIALS [no problem, could not inspect thoroughly] Metal (loss of coating/paint, surface rust, corrosion (pitting, scaling), rusted out, pipe deformation ) Dimensions: Concrete Dimensions/ Dimensions/ Plastic (deterioration, cracking, deformation ) Dimensions: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway-Inlet, Emergency Spillway, Lake Drain}

8 Earthen Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) Erosion: (wave, surface runoff) Description (height/depth/length/etc): Ruts: (entire inlet, lt side, rt side, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Rock-Cut (weathered, erosion) Description: Other: OTHER INLET PROBLEMS [no problem, could not inspect thoroughly] Mis-Alignment:(pipe, chute, sidewall, headwall) Pipe Deformation Separated Joint Loss of Joint Material Undermining: Other: OPEN CHANNEL CONTROL SECTION [no problem, could not inspect] Width (est., ms.) Brdth (est., ms.) OUTLET OBSTRUCTION [no problem, could not inspect thoroughly] Debris: (leaves, trash, logs, branches, ice) Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (entire outlet, lt side, rt side, middle, see dwg) Brush: Quantity: (sparse, dense) (entire outlet, lt side, rt side, middle, see dwg) Other:(beaver activity, partially/completely blocked, i.e.) {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway-Inlet/Outlet, Emergency Spillway, Lake Drain}

9 OUTLET MATERIALS [no problem, could not inspect thoroughly] Metal (loss of coating/paint, surface rust, corrosion (pitting, scaling), rusted out, pipe deformation ) Dimensions: Concrete Dimensions/ Dimensions/ Plastic (deterioration, cracking, deformation ) Dimensions: Earthen Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) Erosion: (other, surface runoff) Description (width/depth/length/etc): Ruts: (entire inlet, lt side, rt side, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Rock-Cut (weathered, erosion) Description/ Other: OTHER OUTLET PROBLEMS [no problem, could not inspect thoroughly] Mis-Alignment:(pipe, chute, sidewall, headwall) Pipe Deformation Separated Joint Loss of Joint Material Undermining: Other: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway-Outlet, Emergency Spillway, Lake Drain}

10 OUTLET EROSION CONTROL STRUCTURE (Stilling Basins) (endwall/headwall, plunge pool, impact basin, flip bucket, USBR, baffled chute, rock lined channel) Components (baffle blocks, chute blocks, endsill) MATERIAL [no problem, could not inspect thoroughly] Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Concrete Dimensions/ Dimensions/ OTHER [no problem, could not inspect thoroughly] Mis-Alignment:( sidewall, headwall, entire struct.) Description: Separated Joint Loss of Joint Material Description: Undermining: Description: Other: DRAINS [none, none found, no problem, could not inspect thoroughly] (See SEEPAGE Section for Toe Drains & Relief Wells) Type: Weep Holes Relief Drains Other: Flow Rate: Size: Number: Type: Weep Holes Relief Drains Other: Flow Rate: Size: Number: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway-Outlet Erosion Control Structure, Emergency Spillway, Lake Drain}

11 EMERGENCY SPILLWAY Found GENERAL INLET [no problem, could not inspect thoroughly] Anti-Vortex Plate [] Dimensions: (adequate, too small,) Type: (steel, concrete, aluminum, stainless steel, corrugated metal wood, other): Deterioration: (missing sections, rusted, collapsed) Flash Boards [] Type: (metal, wood): Deterioration: Trashrack [] Opening Size: (adequate, too small, too large) Type: (metal bars, fence, screen, concrete, baffle, other): Deterioration: (broken bars, missing sections, rusted, collapsed) Maint. INLET OBSTRUCTION [no problem, could not inspect thoroughly] Debris: (leaves, trash, logs, branches, ice) Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (entire inlet, lt side, rt side, middle, see dwg) Brush: Quantity: (sparse, dense) (entire inlet, lt side, rt side, middle, see dwg) Other:(beaver activity, trashrack opening too small, partially/completely blocked, i.e.) INLET MATERIALS [no problem, could not inspect thoroughly] Metal (loss of coating/paint, surface rust, corrosion (pitting, scaling), rusted out, pipe deformation ) Dimensions/ Concrete Dimensions/ Dimensions/ Plastic (deterioration, cracking, deformation ) Dimensions/ {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway-Inlet, Lake Drain}

12 Earthen Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) Erosion: (wave, surface runoff) Description (height/depth/length/etc): Ruts: (entire inlet, lt side, rt side, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Rock-Cut (weathered, erosion) Description: Other: OTHER INLET PROBLEMS [no problem, could not inspect thoroughly] Mis-Alignment:(channel, chute, sidewall, headwall) Pipe Deformation Separated Joint Loss of Joint Material Undermining: Other: OPEN CHANNEL CONTROL SECTION [no problem, could not inspect] Width (est., ms.) Brdth (est., ms.) OUTLET OBSTRUCTION [no problem, could not inspect thoroughly] Debris: (leaves, trash, logs, branches, ice) Trees: Quantity: ( <5, sparse, dense) Diameter: ( <6", 6-12", >12") (entire outlet, lt side, rt side, middle, see dwg) Brush: Quantity: (sparse, dense) (entire outlet, lt side, rt side, middle, see dwg) Other:(beaver activity, partially/completely blocked, i.e.) {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway-Inlet/Outlet, Lake Drain}

13 OUTLET MATERIALS [no problem, could not inspect thoroughly] Metal (loss of coating/paint, surface rust, corrosion (pitting, scaling), rusted out, pipe deformation ) Dimensions: Maint. Concrete Dimensions/ Dimensions/ Plastic (deterioration, cracking, deformation ) Dimensions: Earthen Ground Cover: Type: (grass, crown vetch) Other: Quantity: (bare, sparse, adequate, dense) Appearance: (too tall, too short, good) Erosion: (other, surface runoff) Description (width/depth/length/etc): Ruts: (entire inlet, lt side, rt side, middle, see dwg) Depth: Width Length: (truck/auto, motorcycle, ATV, animals, pedestrian) Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Rock-Cut (weathered, erosion) Description: Other: OTHER OUTLET PROBLEMS [no problem, could not inspect thoroughly] Mis-Alignment:(channel, chute, sidewall, headwall) Pipe Deformation Separated Joint Loss of Joint Material Undermining: Other: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway-Outlet, Lake Drain}

14 OUTLET EROSION CONTROL STRUCTURE (Stilling Basins) (endwall/headwall, plunge pool, impact basin, flip bucket, USBR, baffled chute, rock lined channel) Maint. Components (baffle blocks, chute blocks, endsill) MATERIAL [no problem, could not inspect thoroughly] Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no) Concrete Dimensions/ Dimensions/ OTHER [no problem, could not inspect thoroughly] Mis-Alignment:( sidewall, headwall) Description: Separated Joint Loss of Joint Material Description: Undermining: Description: Other: DRAINS [none, none found, no problem, could not inspect thoroughly] Type: Weep Holes Relief Drains (See SEEPAGE Section for Toe Drains & Relief Wells) Other: Flow Rate: Size: Number: Type: Weep Holes Relief Drains Other: Flow Rate: Size: Number: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway-Outlet Erosion Control Structure, Lake Drain}

15 LAKE DRAIN GENERAL Found Does not have one Type of Lake Drain (isolated control/intake tower, valve vault w/ outlet conduit, valve in riser/drop inlet, siphon) Operated During Inspection (yes, no) Maint. ACCESS TO VALVE/SLUICE GATE [no problem, could not inspect thoroughly] Type (not accessible, from shore, boat, walkway, other) Walkway/Platform: Concrete Deterioration Cracks (platform, piers, end supports, railing) Wood Deterioration Metal Deterioration (minor, moderate, extensive, other) LAKE DRAIN COMPONENTS [no problem, could not inspect thoroughly] Concrete Structure Description: (deterioration, misalignment, cracks): Valve Control (Operating Device) No Operating Device No Stem Bent/Broken Stem Other Notes/Operability: Valve / Sluice Gate Metal Deterioration: (surface rust, minor, moderate, extensive, other) Flow Rate: Misalignment Leakage - Flow Rate: Valve / Sluice Gate Metal Deterioration: (surface rust, minor, moderate, extensive, other) Flow Rate: Misalignment - Leakage - Flow Rate: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

16 Outlet Conduit Metal:(loss of coating/paint, surface rust, corrosion (pitting, scaling), rusted out) Concrete Dimensions/ Plastic:(deterioration, cracking) Conduit Deformation Mis-Alignment: Separated Joint Loss of Joint Material Undermining: Vegetation (trees, brush) Other: Energy Dissipator Type (endwall, plunge pool, impact basin, stilling basin, rock-lined channel, none) Riprap: Average Diameter: (adequate, sparse, displaced, weathered, vegetation) (bedding/fabric noted - yes, no)) Concrete Dimensions/ Mis-Alignment: Separated Joint Loss of Joint Material Undermining: Other: {Upstream Slope, Crest, Downstream Slope, Seepage, Principal Spillway, Emergency Spillway, Lake Drain}

18 Name of Project: File Number: Date: Transit: Rod: Other: Sta. BS HI FS Elev. Description Dam Inspection Survey Notes

19 DAM CLASSIFICATION CHECKLIST Name of Dam: File Number: Permit Number: County: Date: : HEIGHT STORAGE EXEMPT Height of dam as measured = feet Storage volume at top of dam = acre-feet >60' - Class I >5000 acre-feet - Class I Height < 6 feet >40' - Class II > 500 acre-feet - Class II Storage < 15 acre-feet >25' - Class III > 50 acre-feet - Class III 6 feet < Height < 10 feet <25' - Class IV < 50 acre-feet - Class IV & Volume < 50 acre-feet POTENTIAL DOWNSTREAM HAZARD I II III IV X Loss of human life (plausible circumstances envisioned to cause loss of life) A possilble health hazard (loss of public water, wastewater treatment facility) Loss of high-value property (flooding of homes & business, damage to Class I, II & III dams) Damage to interstates & state routes and only access to homes/critical facilities Damage to railroads or public utilities Damage rural bldgs. & not otherwise high-valued property, Class IV dams/levees Damage to local roads (county & township) Losses restricted mainly to the dam and agricultural/rural No hazard to structure noted Distance downstream from dam to affected structure (feet) Vertical distance from streambed to base of affected structure (feet) Horizontal distance from stream to affected structure (feet) Height Class Storage Class Hazard Class Final Class: Exempt I II III IV (circle one) Class Changed (Yes, No)

Formal Annual Inspection It is recommended that you customize this form to fit your dam. Pre-Inspection Information

Formal Annual Inspection It is recommended that you customize this form to fit your dam. Pre-Inspection Information Name of Dam: Inspection Date: Current Weather: Weather During Last Week: Name of Creek,