RBI-HUA-13-13599.pdf

RBI-HUA-13-13599

Routine Bridge Inspection Report Facility Number: 13599 Ft. Huachuca, AZ

Edgardo Ruiz, PE Inspection Date: 5 March 2013 Report Date: June 2013

Distribution authorized to U.S. Government Agencies only. Other requests for this document shall be referred to the U.S. Army Corps of Engineers, Engineer Research and Development Center (CEERD-GS-S), 3909 Halls Ferry Road, Vicksburg, MS 39180.

DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes.

Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products.

All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

PREFACE

This report presents a routine inspection for facility number 13599 at Ft. Huachuca, Arizona and satisfies requirements for routine inspection as specified in Army Regulation (AR) 420-1 “Army Facility Management”, Chapter 7 “Transportation Infrastructure and Dams.”

The Army Bridge Inspection Program is sponsored by the Army Transportation Infrastructure Inspection Program (ATIIP) of the Headquarters Installation Management Command (IMCOM), San Antonio, TX. The IMCOM provided funding for this investigation. Questions shall be directed to Ali A. Achmar, IMCOM ATIIP Program Manager, ali.a.achmar.civ@mail.mil.

Personnel of the U.S. Army Engineer Research and Development Center (ERDC), Geotechnical and Structures Laboratory (GSL), Vicksburg, MS, prepared this publication. The required field inspection was conducted in March 2013. The evaluation team consisted of Lennie A. Gonzalez-Roman, Team Leader, Edgardo Ruiz, PE, and Laura R. Hyde, Structural Engineering Branch (StEB), GSL. Mr. Lennie A. Gonzalez- Roman, StEB, GSL, was the Project Lead under the supervision of Mr. Terry R. Stanton, Chief, StEB; Mr. Bartley P. Durst, Chief, Geosciences and Structures Division; Dr.

William P. Grogan, Deputy Director, GSL; and Dr. David W. Pittman, Director, GSL.

COL Kevin J. Wilson was the Commander and Executive Director of ERDC, and Dr.

Jeffery P. Holland was the Director.

The Installation POC is Christopher Hauser, (520) 533-1865, Christopher.j.hauser3.civ@mail.mil.

The Field Inspection Team Leader is Lennie A. Gonzalez-Roman, (601) 634-3229, lennie.a.gonzalez-roman@usace.army.mil.

The numbering convention for reporting purposes is from left to right looking from upstream to downstream. All units of measure in this report are in U.S. (English) units unless noted otherwise except for those in the NBI Form which are in metric (SI) units.

Table of Contents

BRIDGE ID & DESCRIPTION ........................................................................ 13599-1

SKETCHES ................................................................................................... 13599-5

SUMMARY OF FINDINGS ............................................................................ 13599-6

NBI FORM .................................................................................................. 13599-17

INSPECTION RECORD .............................................................................. 13599-18

CHANNEL PROFILE .................................................................................. 13599-28

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BRIDGE ID & DESCRIPTION

1 Span Concrete T-Beam Bridge

BRIDGE LOCATION MAP

NOT TO SCALE

SATELLITE VIEW

31°34'01.88" N/ 110°23'44.92" W

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Figure 1. Elevation view

Figure 2. Roadway Approach

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Figure 3. Underside View

Figure 4. Upstream View

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Figure 5. Downstream View

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SKETCHES

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SUMMARY OF FINDINGS

Critical Findings / Sustainment Deficiencies and Recommendations:

Table 1 shows all critical findings that require immediate attention. Table 2 shows the deficiencies and recommendations for the bridge that should be completed over the next two years, or for larger rehabilitation or replacement projects where planning and design should begin. The estimated costs in Tables 1 and 2 are approximate costs based on the cost of material and labor required to complete the recommended repair, in U.S. dollars. All cost data is based on current bid tabulations from the California Department of Transportation’s report “2012 Contract Cost Data- A

Summary of Cost by Items for Highway Construction Projects.” These approximate cost estimates should only be used as a reference and for project planning purposes.

Although they represent the costs for individual repair activities, they may not represent the total cost of a complete repair/rehabilitation project. Costs such as Engineers’

Office, Submittal Reviews, Mobilization and Demobilization, Maintenance of Traffic, Stream Diversion, Contractor's bond etc. would have to be added to the costs provided to develop a complete project cost.

R B

I-H U

A -13-1359

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Table 1: Critical Findings

PHOTO DEFICIENCY RECOMMENDATION

REPEAT

DEFICIENCY

(Y/N)

QTY AMOUNT

($K)

N/A None None N/A 0 $0.0

TOTAL: $0.0

Table 2: Deficiencies & Recommendations

PHOTO DEFICIENCY RECOMMENDATION

REPEAT

DEFICIENCY

(Y/N)

QTY AMOUNT

($K)

1, 2 Low height of bridge rails. Inadequate bridge rail posts are deteriorated.

Replace bridge railing to meet FHWA standards. Y 60 LF $5.1

3 End treatment missing on approach 2, US. Install end treatment. Y 1 EA $3.0

4 DS Utilities are catching debris. Remove debris. Y 1 CY $0.1

5, 6 Deck honeycombing/spalls exposing rebar with section loss.

Remove unsound concrete, clean rebar, and patch with appropriate material. Y 8 SF $4.0

7, 8

Shear and moment cracks in all girders. Monitor. Y 0 $0.0

Due to signs of overstress, load rating and posting is recommended.

Load rate or test load structure, depending on availability of drawings. Y 1 EA $5.0

9 Vertical crack at the US WW/back wall interface. Monitor. Y 0 $0.0

10 10-in scour hole near abutment 2 (DS), exposing toe of abutment footing. Backfill with adequate material. Y 2 CY $0.2

11 As much as 2-ft of aggradation under bridge. Remove material. Y 50 CY $4.0

TOTAL: $21.4

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PHOTO #1

PHOTO #2

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PHOTO #3

PHOTO #4

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PHOTO #5

PHOTO #6

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PHOTO #7

PHOTO #8

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PHOTO #9

PHOTO #10

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PHOTO #11

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Installation Status Report (ISR): Facility Number 13599 has a recommended Mission-Functional

ISR of 1.50, GREEN, and a recommended Quality ISR rating of 3.00, RED, due to approach configuration.

Table 3a: ISR Mission Functional

Green Amber Red N/A

BRIDGE RESTRICTIONS (10pts):

Bridge capacity is sufficient for current mobilization requirements.

BRIDGE RESTRICTIONS:

Bridge can be strengthened to meet current requirements with minimal rehabilitation

BRIDGE RESTRICTIONS:

Bridge capacity is insufficient or unable to be rehabilitated to meet current requirements.

0 [ ]

BRIDGE SAFETY FEATURES

(10pts): All safety features are rated 1 or N per FHWA requirements (Approach guardrails, Bridge end treatments, Bridge transitions, Bridge guardrails).

BRIDGE SAFETY FEATURES:

Any safety features rated 0 with a plan of action available to address deficiencies and deficiencies scheduled for upgrade.

BRIDGE SAFETY FEATURES:

Any safety features rated at 0, with no upgrade actions planned, or rating is unknown. 10 [ ]

BRIDGE INSPECTIONS (10pts):

•The responsible engineer (e.g., DPW) has inspected bridge in last 2 Years •Routine and special inspections are conducted within the required frequency •Records are maintained •MACOM engineer has conducted an on-site review of bridge inspections within the last 3 years

BRIDGE INSPECTIONS::

•Bridge inspection over 2 years old •At least one routine and special inspection has been completed and •Inspections recorded, and an inspection scheduled within one year •MACOM engineer has conducted an on-site inspection within the last 5 years

BRIDGE INSPECTIONS::

•Bridge not on Installation inventory, or •No routine or special inspections have been conducted, or •No records are available, or •MACOM engineer has not inspected bridges on-site in over 5 years

0 [ ]

MILITARY LOAD

CLASSIFICATION (MLC) (10pts):

MLC is posted with:

Weight limit Overhead clearance Minimum lane widths Speed & traffic markers

MILITARY LOAD

CLASSIFICATION (MLC):

N/A [No Amber Condition]

MILITARY LOAD

CLASSIFICATION (MLC):

MLC is not posted 0 [ X ]

BRIDGE MARKINGS (10pts):

Bridge and underpass is marked for weight, height, speed, and width restrictions

BRIDGE MARKINGS:

Bridge is marked for weight, height, speed, and width restrictions Underpass is not marked

BRIDGE MARKINGS:

No bridge or underpass markings

0 [ ]

PEDESTRIANS (6pts):

Bridge has a separated pedestrian walkway where required

PEDESTRIANS:

Roadway is used by pedestrians; walkway could be built to accommodate pedestrians

PEDESTRIANS:

Roadway is used by pedestrians; walkway cannot be built to accommodate pedestrians

0 [ X ]

SPECIAL TRANSPORT (6pts):

Bridge will accommodate special transport requirements

SPECIAL TRANSPORT:

Bridge is unable to accommodate special transport, but an alternate route is available

SPECIAL TRANSPORT:

Bridge is unable to accommodate special transport requirements; no alternate route is available

0 [ X ]

Totals Points (62 Max): 30 0 10

Component Rating: 1.50 GREEN 1.00-1.66: Green 1.67-2.33: Amber 2.34-3.00: Red

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Table 3b: ISR Quality

Green Amber Red N/A

BRIDGE CONDITION (10pts):

Federal Highway

Administration (FHWA) condition rate in GOOD or better at 7, 8, 9, or N for the:

Bridge deck Superstructure Substructure Culverts Channel Approach roadway

BRIDGE CONDITION:

FHWA requirements rate bridge in FAIR condition at an inspection rating of 5, or If BRIDGE CONDITION is RED but there is a project shown during the inspection that addresses the deficiencies with funding being requested

BRIDGE CONDITION:

FHWA requirements rate bridge in POOR condition at an inspection rating of 0, 1, 2, 3, or 4

10 [ ]

Totals Points (10 Max): 0 0 10

Component Rating: 3.00 RED 1.00-1.66: Green 1.67-2.33: Amber 2.34-3.00: Red

Condition: Overall, Facility Number 13599 is in fair condition (NBI Rating = 5) due to issues with the deck and girders.

Structure Capacity:

Table 4: Civilian Capacity

Civilian Posted Loads LR State Legal Loads Load Rating Document LR Date

None None None N/A

Structure shows signs of over-stress, a load rating of the structure should be considered.

Table 5: Military Load Classification

Posted

MLC

1-way Wheel

Calc

MLC

1-way Wheel

Posted

MLC

2-way Wheel

Calc

MLC

2-way Wheel

Posted

MLC

1-way Track

Calc

MLC

1-way Track

Posted

MLC

2-way Track

Calc

MLC

2-way Track

None Unknown None Unknown None Unknown None Unknown

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Channel Scour:

Table 6: Channel Scour

Scour Screening (Level 1/2)

Low Risk (Y/N)

Priority (Low/High) Document

Document Date

(MM/YY)

Channel Profile

Significant Change (>1m)

Profile Base Year

1 Y Low RBI-HUA-11-13599 06/11 N/A 2009

Traffic Safety: The traffic safety features of structure do not meet current standards.

Table 7: Traffic Safety

NBI Item 36A Bridge Rails

NBI Item 36B Transition

NBI Item 36C Approach Rails

NBI Item 36D End Treatments

0 N N 0

Prior Report: The 2011 Inspection Report was on file and consulted or reviewed for comparison purposes.

Table 8: Critical Findings

Critical Findings from Previous Report (NBI item < 4 or load restriction)

New Critical Findings Description

CF

Inspection Frequency (months)

Recommended Action

None None N/A None

Table 9: Completed Repairs since Last Inspection

Deficiency Resolution Date

Multiple deficiencies. None N/A

Fracture Critical: Structure 13599 is not fracture critical.

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NBI FORM

All measurements are metric units

(202) Army Bridge Inventory Structure Number: DAPTRAHUA013599

(8) NBI Structure Number: DAPTRAHUA013599

(1) State Arizona (54) Min Vert Underclearance N 0.00

(2) District 00 (55) Min Lat Underclrnc-Right 99.9

(3) County Cochise (56) Min Lat Underclrnc-Left 0.0

(4) Place Fort Huachuca (58) Deck 5

(5) Inventory Route 180000000 (59) Superstructure 5

(6) Features Intrsct SLAUGHTERHOUSE WASH (60) Substructure 7

(7) Facility Carried CANELO RD (61) Chn & Chn Protection 7

(8) Structure Number DAPTRAHUA013599 (62) Culverts N

(9) Location DEAD MANS CURVE (63) Method to det. Operating Rating 5

(10) Min Vert Clrnc 99.99 (64) Operating Rating 0.0

(11) Kilometer Point 0.000 (65) Method to det. Inventory Rating 5

(12) Highway Network 0 (66) Inventory Rating 0.0

(13) LRS Inventory Rt (67) Structural Evaluation 3

(16) Latitude 31ø 34' 01.88" (68) Deck Geometry

(17) Longitude 110ø 23' 44.92" (69) Underclrnc Vert/Horz

(19) Bypass, Detour Length 001 (70) Bridge Posting 5

(20) Toll 3 (71) Waterway Adequacy 7

(21) Custodian 74 (72) Approach Rdwy Align 3

(22) Owner 74 (75) Type of Work 381

(26) Functional Classification 09 (76) Length of Improvement 15.1

(27) Year Built 1960 (90) Inspection Date 0313

(28) Lanes On/Under 0200 (91) Inspection Frequency (Mo) 24

(29) ADT 001000 (92) Critical Feature Insp. N N N

(30) Year of ADT 2013 (93) Critical Insp. Date

(31) Design Load 5 (94) Bridge Impvmnt Cost 000020

(32) App Rdwy Width 7.3 (95) Roadway Impvmnt Cost 000001

(33) Bridge Median 0 (96) Total Project Cost 000021

(34) Skew Degree 00 (97) Yr of Impvmnt Cost Est 2013

(35) Stru Flared 0 (98) Border Bridge

(36) Safety Features 0NN0 (99) Border Bridge Str No

(37) Historical Significance 5 (100) Defense Hwy Designation 0

(38) Navigation Ctrl 0 (101) Parallel Stru Designtn N

(39) Navigation Vertical Clearance 0.0 (102) Direction of Traffic 2

(40) Navigation Horizontal Clearance 0.0 (103) Stru Designation

(41) Stru. Open/Post/Close A (104) Hwy Sys of Inventory Rt 0

(42) Type of Service 15 (105) Federal Lands Highways 0

(43) Stru Type Main 102 (106) Year Reconstructed 0000

(44) Stru Type-App Spans 000 (107) Deck Structure Type 1

(45) No. Spans-Main 001 (108) Wearing Surf Protective 688

(46) No. Approach Spans 0000 (109) Ave Daily Truck Traffic 10

(47) Total Horz Clearance 7.3 (110) Designated Natl Network 0

(48) Length of Max Span 8.5 (111) Pier/Abutment Protection

(49) Structure Length 8.5 (112) NBIS Bridge Length Y

(50) Curb/Sidewalk Width L 0.0, R 0.0 (113) Scour Critical Bridge 8

(51) Bridge Rdwy Width C-C 7.3 (114) Future ADT 001000

(52) Deck Width O-O 7.5 (115) Year of Future ADT 2035

(53) Vert Clrnc over Rdwy 99.99 (116) Min Nav Vert Clearance 0.0

Army Bridge Inventory 200 Items

(200) COE Division

(201) COE District

(202) ABI Structure Number DAPTRAHUA013599

(203) Inspection Office ERDC

(204) Inspector L. GONZALEZ

(205) Inspection Cost 003000

(206) Cooper's Loading

(207) Railroad Stru Number

(208) Name of Railroad

(209) Recommended Speed Limit

(210) Posted Speed Limit (KPH)

(211) MACOM CE-TRADOC

(212) Installation Name FORT HUACHUCA

(213) MLC 1-Way Wheel N

(214) MLC 1-Way Track N

(215) Installation Number 04005

(216) Seismic Category B

(217) Acceleration Coefficient 0.07

(218) Soil Site Coefficient 1.2

(222) Mission Func G ISR Qual. R

(223) MLC 2-way Wheel

(224) MLC 2-way Track

Sufficiency Rating = 018.0 Functionally Obsolete

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INSPECTION RECORD

ITEM # 72: APPROACH FEATURES

Rating Guidelines

CODE DESCRIPTION

8 Speed reduction is NOT required.

6 A VERY MINOR speed reduction is required.

3 A SUBSTANTIAL speed reduction is required.

Components Rating

Rating Component Remarks

3 1. Horizontal Alignment Sharp horizontal curve on both approaches – known as dead man’s curve.

3 2. Vertical Alignment Significant grade on both approaches.

3 General Rating Condition (NBI ITEM #72)

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ITEM # 72: APPROACH FEATURES (CONTINUED)

Code Description

N NOT APPLICABLE

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION: No problems noted.

7 GOOD CONDITION: Some minor problems.

6 SATISFACTORY CONDITION: Structural elements show some minor deterioration.

5 FAIR CONDITION: All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

4 POOR CONDITION: Advanced section loss, deterioration, spalling or scour.

SERIOUS CONDITION: Loss of section, deterioration, spalling or scour has seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION: Advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

IMMINENT FAILURE CONDITION: Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in light service.

0 FAILED CONDITION: Out of service – beyond corrective action.

Rating Component Unit Amt Remarks

N 1. Relief Joints LF 0 Seem to have been covered by overlay

N 2. Approach:

a) Guardrail LF 0 None

7 b) Pavement SF 1,380 None

6 c) Embankment EA 4 2-ft erosion hole near approach 2, US side. The erosion is caused by surface runoff and it is undermining railing post.

DS WWs are buried.

N 3. Load Posting Sign EA 0 None

7 4. Hazard Markers EA 4 None

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ITEM #36: TRAFFIC SAFETY FEATURES

CODE DESCRIPTION

1 Inspected feature MEETS currently acceptable standards.

0 Inspected feature DOES NOT currently meet acceptable standards or a safety feature is required and NONE

IS PROVIDED.

0 1. Bridge Rails LF 106 12-ft 6-in spacing is inadequate for the speed and traffic demands.

N 2. Transition EA 0 None

N 3. Approach Rails LF 0 None

0 4. End Treatments EA 3 End treatment missing on Approach 2, US side.

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ITEM #58: DECK FEATURES

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION: No problems noted.

7 GOOD CONDITION: Some minor problems.

6 SATISFACTORY CONDITION: Structural elements show some minor deterioration.

5 FAIR CONDITION: All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

4 POOR CONDITION: Advanced section loss, deterioration, spalling or scour.

3 SERIOUS CONDITION: Loss of section, deterioration, spalling or scour has seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION: Advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

IMMINENT FAILURE CONDITION: Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in light service.

7 1. Wearing Surface SF 810 Asphalt. Transverse cracks.

5 2. Deck Structural Condition SF 810

2-ft x 2-ft honeycombing on bay 2, about 2-in deep with exposed rebar – no significant section loss.

Full length longitudinal crack (0.050-in) on center of bay 2 with efflorescence.

1-ft x 2-ft honeycombing on bay 3 with exposed rebar.

Spall (2-ft x 2-ft) on DS overhang, with efflorescence and exposed rebar – no section loss.

N 3. Curbs LF 0 None

N 4. Median SF 0 None

N 5. Sidewalk SF 0 None

N 6. Parapet LF 0 None

5 7. Railing LF 106 Missing end treatment.

Mid post is heavily rusted and perforated.

N 8. Drains EA 0 Original drains were plugged by overlays.

N 9. Lighting EA 0 None

7 10. Utilities EA 2 DS utility pipes are catching surface debris.

N 11. Expansion Joints LF 0 Covered by overlay

5 General Rating Condition (NBI ITEM # 58)

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ITEM # 59: SUPERSTRUCTURE FEATURES

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION: No problems noted.

7 GOOD CONDITION: Some minor problems.

6 SATISFACTORY CONDITION: Structural elements show some minor deterioration.

5 FAIR CONDITION: All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

4 POOR CONDITION: Advanced section loss, deterioration, spalling or scour.

3 SERIOUS CONDITION: Loss of section, deterioration, spalling or scour has seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION: Advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

IMMINENT FAILURE CONDITION: Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in

N 1. Bearing Devices EA 0 None

5 2. Girders/Beams A. General LF 112

Shear cracks (0.016-in) in all girders – near abutments.

Stress cracks (0.130-in) at center span of all girders. Cracks propagate towards abutments. Honeycombing on girder 3 near abutment 1, exposed rebar – no section loss. Girder 3 has a flexural/shear crack at midspan (0.040-in).

N B. Cross Frame EA 0 None

N C. Bracing EA 0 None

N 3. Floor Beams EA 0 None

N 4. Arch

a) Barrel LF 0 None

N b) Spandrel Wall /Columns SF 0 None

N 5. Paint LF 0 None

5 General Rating Condition (NBI ITEM # 59)

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ITEM #60: SUBSTRUCTURE FEATURES

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION: No problems noted.

7 GOOD CONDITION: Some minor problems.

6 SATISFACTORY CONDITION: Structural elements show some minor deterioration.

5 FAIR CONDITION: All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

4 POOR CONDITION: Advanced section loss, deterioration, spalling or scour.

3 SERIOUS CONDITION: Loss of section, deterioration, spalling or scour has seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION: Advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

IMMINENT FAILURE CONDITION: Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in

7 1. Abutments

a) Wings

EA 4

- DS: some cracks on the WW. mostly covered with embankment material

- US: partially covered, vertical cracks at the WW/back wall interference.

N b) Backwall SF 2 Could not see.

N c) Bearing Seats EA 8 Could not see.

6 d) Breast Wall / Bulkhead SF 240

Some honeycombing at both abutments.

Efflorescence can be seen full length at abutment 1, near bottom.

N e) Footing SF 0 None

N f) Piles EA 0 None

N g) Bracing LF 0 None

7 h) Scour / Erosion 10-in scour hole DS side, exposing toe of abutment 2.

7 i) Settlement None

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ITEM #60: SUBSTRUCTURE FEATURES (CONTINUED)

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION: No problems noted.

7 GOOD CONDITION: Some minor problems.

6 SATISFACTORY CONDITION: Structural elements show some minor deterioration.

5 FAIR CONDITION: All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

4 POOR CONDITION: Advanced section loss, deterioration, spalling or scour.

3 SERIOUS CONDITION: Loss of section, deterioration, spalling or scour has seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or shear cracks in concrete may be present.

CRITICAL CONDITION: Advanced deterioration of primary structural elements. Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the bridge until corrective action is taken.

IMMINENT FAILURE CONDITION: Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in

N 2. Piers / Bents / Piles

a) Caps EA 0 None

N b) Bearing Seats EA 0 None

N c) Column, Stem, Wall SF 0 None

N d) Footing SF 0 None

N e) Piles EA 0 None

N f) Bracing EA 0 None

N g) Scour / Erosion None

N h) Settlement None

7 General Rating Condition (NBI ITEM # 60)

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ITEM # 61: CHANNEL / CHANNEL PROTECTION

N Not applicable. Use when bridge is not over a waterway (channel).

9 There are no noticeable or noteworthy deficiencies which affect the condition of the channel.

8 Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition.

7 Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift.

6 Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly.

5 Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and brush restrict the channel.

4 Bank and embankment protection is severely undermined. River control devices have severe damage. Large deposits of debris are in the channel.

3 Bank protection has failed. River control devices destroyed. Stream bed aggradation, degradation or lateral movement has changed the channel to now threaten the bridge and/or approach roadway.

2 The channel has changed to the extent the bridge is near a state of collapse.

1 Bridge closed because of channel failure. Corrective action may put back in light service.

0 Bridge closed because of channel failure. Replacement necessary.

7 1. Channel Scour None

7 2. Embankment Erosion None

6 3. Drift Some branches and aggradtion (2-ft) under bridge reducing hydraulic opening.

7 4. Vegetation Grass US and DS. Grass directs flow towards abutment 2.

N 5. Rip Rap None

7 General Rating Condition (NBI ITEM #61)

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ITEM # 113: SCOUR CRITICAL BRIDGES

N Bridge not over waterway.

U Bridge with "unknown" foundation that has not been evaluated for scour. Until risk can be determined, a plan of action should be developed and implemented to reduce the risk to users from a bridge failure during and immediately after a flood event. (see HEC 23).

T Bridge over "tidal" waters that have not been evaluated for scour, but considered low risk. Bridge will be monitored with regular inspection cycle and with appropriate underwater inspections until an evaluation is performed. ("Unknown" foundations in "tidal" waters should be coded U.)

9 Bridge foundations (including piles) on dry land well above flood water elevations.

Bridge foundations determined to be stable for the assessed or calculated scour condition: Scour is determined to be above top of footing (Example A) by assessment (i.e., bridge foundations are on rock formations that have been determined to resist scour within the service life of the bridge4), by calculation or by installation of properly designed countermeasures (see HEC 23).

8P Bridge is a culvert-type structure with paved bottom.

8L Bridge has been evaluated / assessed as a low risk structure and no further study is required.

Countermeasures have been installed to mitigate an existing problem with scour and to reduce the risk of bridge failure during a flood event. Instructions contained in a plan of action have been implemented to reduce the risk to users from a bridge failure during or immediately after a flood event.

6 Scour calculation/evaluation has not been made. (Use only to describe case where bridge has not yet been evaluated for scour potential.)

6R Bridge is scheduled for major rehabilitation or replacement within the next 5 years; the scour study is deferred to the location/design phase of the bridge project. Periodic monitoring may be necessary.

6U

Bridge foundations are unknown. The bridge site conditions have been evaluated / assessed with cursory study in the field and office, and the risk of potential damage from scour is judged to be moderate or mild.

Structure has no history of scour problems. Further evaluation is deferred. If the risk of damage from potential or actual scour damage is judged to be severe, additional scour studies will be undertaken including borings or others means of subsurface exploration to ascertain foundation and supporting soil conditions.

Bridge foundations determined to be stable for assessed or calculated scour condition: Scour is determined to be within the limits of footing or piles (Example B) by assessment (i.e., bridge foundations are on rock formations that have been determined to resist scour within the service life of the bridge), by calculations or by installation of properly designed countermeasures (see HEC 23).

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4 Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required to protect exposed foundations (see HEC 23).

Bridge is scour critical; bridge foundations determined to be unstable for assessed or calculated scour conditions:

- Scour within limits of footing or piles.

- Scour below spread-footing base or pile tips.

3M Bridge is rated as scour critical on the basis of an evaluation and/or analysis; the potential risk is judged to be mild or moderate, and no actions are planned other than monitoring during routine inspections and after flood events.

3C Bridge is rated as scour critical on the basis of an evaluation and/or analysis; the potential risk is judged to be severe and scour countermeasures are planned. Monitoring is to be performed until scour countermeasures are in place.

Bridge is scour critical; field review indicates that extensive scour has occurred at bridge foundations, which are determined to be unstable by:

- a comparison of calculated scour and observed scour during the bridge inspection, or

- an engineering evaluation of the observed scour condition reported by the bridge inspector in Item 60.

Bridge is scour critical; field review indicates that failure of piers/abutments is imminent. Bridge is closed to traffic. Failure is imminent based on:

- a comparison of calculated and observed scour during the bridge inspection, or

- an engineering evaluation of the observed scour condition reported by the bridge inspector in Item 60.

0 Bridge is scour critical. Bridge has failed and is closed to traffic.

Component Rating

8L NBI ITEM # 113 None

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CHANNEL PROFILE

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Upstream Channel Profile Bridge 13599 Reference Point: Top of Slab

Supports at scale for horizontal location purposes only

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Downstream Channel Profile Bridge 13599 Reference Point: Top of Slab

Supports at scale for horizontal location purposes only

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