5140-008P1594_Redacted.pdf

STRUCTURE NO. 5140 008P

OTTER CREEK CULVERT #2 INSPECTION DATE: 11/2/16

STRUCTURE SUMMARY

CULVERT IDENTIFICATION AND DESCRIPTION

MAIN SPAN MATERIAL: ........ CONCRETE CONTINUOUS NO. OF BARRELS:

FOUNDATION: ....................... SPREAD FTG ON BEARING MAT'L

BARREL LENGTH: ............... 57 FT (17 M)

STRUCT. TOTAL LENGTH: ... 45.5 FT (13.9 M) SKEW ANGLE: ..................... 30 °

MAX. SPAN LENGTH: ............ 21.0 FT (6.4 M) 1957

YEAR BUILT:

PROJ./PLAN REF. NO: .......... 1G6 / 3001

YEAR RECONSTRUCTED: .. N/A

NPS ROAD CLASS: ............... 1 - PRINCIPAL PARK ROAD

STRUCTURE HISTORY: ....... 1984-JOINT REPAIR.

LOCATION

BLUE RIDGE PARKWAY MILE POINT: ..................... 58.45 (KM PT 94.06)

STATE: .................................. VIRGINIA LOCATION: 43.0 MILES TO VA ROUTE 130

FACILITY CARRIED: ............. BLUE RIDGE PARKWAY

FEATURE INTERSECTED: ... OTTER CREEK

STRUCTURE EVALUATION SUMMARY

This two barrel concrete box culvert is in fair condition overall. The stream approaches the culvert at an angle and flows directly against the northeast wingwall creating a moderate scour hole at the northeast corner of the structure, and water is penetrating the masonry wingwalll. In addition, the north half of each barrel has partially filled in with approximately 3' of silt and stones as a result of the redirected channel flow. There is also a moderate accumulation of flood debris at the east side of the intermediate wall.

Additional problems include deterioration of the mortar joints throughout the structure, several areas of spalling with exposed rebar on the slab underside and vegetation growth along the top of both headwall.

Corrective action should be taken as outlined in this report to prevent the possible development of more serious or costly problems in the future. In addition scour problems should be monitored to determine if further action is required. Consideration should also be given to installing a guardrail system to help improve motorist safety.

INSPECTION TEAM: R. SILVESTRY, L. ELLIS

CONDITION ASSESSMENT:

REINALDO SILVESTRY, FIELD TEAM LEADER 703-404-6251

REPORT REVIEW:

MARCUS MILLER, P.E., BRIDGE INSPECTION ENGINEER 703-404-6252

REPORT APPROVAL: DATE: 3/31/17

JORGOMAI CEESAY, PH.D., P.E., BIP SUPERVISORY ENGINEER 703-404-6244

RECOMMENDATIONS AND ESTIMATED COSTS STRUCTURE NO. 5140 008P

226 PRIORITY OF IMPROVEMENT C

A (Critical) - Structure is closed, in imminent danger of collapse, or presents a critical safety hazard.

B (Major) - Structure exhibits severe deterioration, presents a safety hazard, or is designated a high priority due to age and/or condition.

C (Moderate) - Structure is deficient, functionally obsolete, or requires substantial repairs to prevent a serious deficiency or unsafe condition.

D (Minor) - Structure is generally in good condition. Preventative maintenance may be required.

E (Special) - Structure is under construction or reconstruction.

ITEM

NO.

MAINTENANCE RECOMMENDATIONS

(GENERALLY NOT FLHP ELIGIBLE)

QTY. UNIT COST

UNIT

ESTIMATE

COST

PRELIM.

62.3,4 REMOVE VEGETATION GROWTH FROM WINGWALLS AND HEADWALL, INCLUDING

TREE ON TOP OF SOUTHWEST WINGWALL.

1 LS

62.1,7 CLEAN AND RESEAL SETTLEMENT CRACKS AT DOWNSTREAM END OF SOUTH

WALL.

20 LF

PRELIM. MAINTENANCE TOTAL :

ITEM

NO.

REHABILITATION/RECONSTRUCTION

(TYPICALLY NEEDED WITHIN 5 YEARS)

QTY. UNIT

UNIT

COST ESTIMATES

PRELIM. COST

REHAB. RECONSTR.

62.9, 222.3 INSTALL GUARDRAIL SYSTEM OVER STRUCTURE AND AT

APPROACHES.

1 LS

61.4, 62.5 REMOVE ACCUMULATION OF DEBRIS FROM UPSTREAM SIDE OF

STRUCTURE AND SILT AND STONE FROM BARRELS.

1 LS

61.1,2, 62.6 PLACE ENGINEERED RIPRAP TO REDIRECT CHANNEL AWAY FROM

NORTHEAST CORNER, AND FILL SCOUR HOLE.

1 LS

62.4 CLEAN AND REPOINT WINGWALL MASONRY MORTAR JOINTS AS

NECESSARY.

1 LS

62.1 CLEAN EXPOSED REBAR ON SLAB UNDERSIDE AND COAT WITH

APPROVED SEALANT.

1 LS

62.10 SEAL TRANSVERSE AND LONGITUDINAL CRACKS ON WEARING

SURFACE

1 LS

CONTRACT COSTS FOR MOBILIZATION, TRAFFIC CONTROL, AND

DESIGN CONSTRUCTION ENGINEERING (70% TOTAL REHAB COST)

PLUS PARK LOCATION FACTOR.

1 LS

PRELIM. REHABILITATION/RECONSTRUCTION TOTAL :

PRELIMINARY ESTIMATE TOTAL* :

(*Includes typical contract costs for mobilization, traffic control, and design/construction engineering; but does not include detour bridges, work beyond the bridge limits, or work not listed above. Estimates are approximate and are for preliminary planning purposes only; they should not be used as a complete or final engineers estimate.)

REMARKS: Cost estimates assume that recommended actions will be combined with similar work being performed on other structures.

FIELD INSPECTION REPORT STRUCTURE NO. 5140 008P

CONDITION RATING CODES FOR ITEMS 58 - 62, 222, 223

N

NOT APPLICABLE

EXCELLENT CONDITION

VERY GOOD CONDITION - no problems noted.

GOOD CONDITION - some minor problems.

SATISFACTORY CONDITION - structural elements show some minor deterioration.

FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling, or scour.

POOR CONDITION - advanced section loss, deterioration, spalling, or scour.

SERIOUS CONDITION - loss of section, deterioration, spalling, or scour have 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 structure until corrective action can be taken.

“IMMINENT” FAILURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Structure is closed to traffic but corrective action may return structure to light service.

FAILED CONDITION - out of service; beyond corrective action.

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

G = GOOD (CODES 7 - 9) F = FAIR (CODES 5 - 6) P = POOR (CODES 0 - 4)

61. CHANNEL 6

F ALIGNMENT1.

F EROSION AND/OR SCOUR2.

N 3. CHANNEL PROTECTION

F4. WATERWAY OBSTRUCTIONS

N 5. OTHER

6. ADEQUACY OF OPENING SUFF

NORMAL VELOCITY MED 7.

8 FT.AVG. CLEAR OPENING 8.

ITEM REFERENCE AND REMARKS

9. STREAM BED COMPOSITION :

SAND, SILT, ROCK

62. CUL VERT 6

PARAPETS AND/OR RAILINGS 9.

ADEQUACY OF COVER 8.

SETTLEMENT AND/OR DEFLECTION 7.

EROSION AND/OR SCOUR 6.

5. DEBRIS AND/OR SILT

4. WINGWALLS

3. HEADWALLS

2. FOOTINGS

1. BARREL(S)

ROADWAY SURFACE10.

11. RIDEABILITY

12. OTHER

F

G

G

F

F

F

F

G

N

G

G

N

222. APPROACHES 7

OTHER9.

8. ALIGNMENT

SIGNS 7.

6. SETTLEMENT

EROSION5.

SURFACING4.

APPROACH GUARDRAIL3.

RELIEF JOINTS 2.

APPROACH SLABS1. N

N

N

G

G

G

N

G

N

223. RETAINING WALL N

6. OTHER

5. SETTLEMENT OR DEFLECTION

4. EROSION AND/OR SCOUR

3. FOUNDATION

2. WEEP HOLES

1. WALL

36. TRAFFIC AND SAFETY FEATURES

C. APPROACH GUARDRAILS

B. TRANSITIONS

A. BRIDGE RAILINGS

D. APPROACH GUARDRAIL ENDS

TRAFFIC SAFETY RATING CODES

0 - Does not meet standards or a safety feature is required and none is provided.

1 - Meets currently acceptable standards.

N - Not applicable or a safety feature is not required. 3 OF 19

61.1,2,4, 62.6 VEGETATION GROWTH IN CHANNEL ON BOTH SIDES OF

STRUCTURE; DIRECTS FLOW TOWARD NORTHEAST WINGWALL

RESULTING IN MINOR SCOUR (2.5' DEEP) AT EAST CORNER OF

NORTH END WALL AND MODERATE SLOUGHING OF NORTH

UPSTREAM CHANNEL BANK WITH UNDERMINED TREES.

MODERATE SLOUGHING (4' DEEP) OF NORTH DOWNSTREAM

CHANNEL BANKS WITH UNDERMINED TREES. MINOR SCOUR (1’

DEEP) AT WEST SIDE OF SOUTH END WALL.

FLOOD DEBRIS ACCUMULATION AT UPSTREAM END OF

INTERMEDIATE WALL.

62.1,7 MINOR TRANSVERSE CRACKING WITH MODERATE

EFFLORESCENCE ON SLAB UNDERSIDE. MINOR MAP CRACKING OF

SLAB UNDERSIDE IN NORTH BARREL. TWO EXPOSED AND RUSTED

LONGITUDINAL REBAR ON SLAB IN NORTH BARREL AT

INTERMEDIATE WALL NEAR EAST SIDE; TWO AT WEST SIDE; AND

ONE IN SOUTH BARREL AT INTERMEDIATE WALL NEAR EAST SIDE.

MINOR EFFLORESCENCE FROM BARREL WALL MASONRY MORTAR

JOINTS; MINOR MOISTURE SEEPAGE ON SOUTH WALL. MINOR

WATER FLOW THROUGH BOTTOM 1' OF MASONRY MORTAR JOINTS

NEAR WEST SIDE OF NORTH END WALL FROM RETAINED FILL.

STREAM FLOW APPEARS TO BE PENETRATING NORTHEAST

WINGWALL; SEE ALSO 61.1,2,4, 62.6.

UP TO 3/8" WIDE CRACKING OF MASONRY MORTAR JOINTS AT WEST

SIDE OF SOUTH END WALL, POSSIBLY DUE TO SETTLEMENT OF

WINGWALL.

62.3 MINOR EFFLORESCENCE FROM RING STONE MASONRY MORTAR

JOINTS. MINOR VEGETATION GROWTH ON TOP OF HEADWALLS.

FIELD INSPECTION REPORT STRUCTURE NO. 5140 008P

ADDITIONAL ITEM REFERENCE AND REMARKS

62.4 MODERATE DETERIORATION OF NORTHEAST WINGWALL MASONRY MORTAR JOINTS AT WATERLINE. SEE ALSO

61.1,2,4, 62.6.

MINOR CRACKING OF WINGWALL MASONRY MORTAR JOINTS; EFFLORESCENCE ON NORTH WINGWALLS.

MODERATE VINE GROWTH ON WINGWALLS WITH SMALL TREE GROWING ON TOP OF SOUTHWEST WINGWALL.

62.5 MODERATE TO HEAVY ACCUMULATION OF SILT AND STONE (UP TO 3' DEEP) IN NORTH HALF OF BOTH BARRELS.

62.10, 222.4,6

MINOR LONGITUDINAL AND TRANSVERSE CRACKING OF ASPHALT PAVEMENT. MINOR SETTLEMENT ALONG

NORTHBOUND LANE OVER CULVERT EXTENDING PAST CULVERT ENDS.

222.7 NO HEADWALL MARKERS PRESENT.

36,A,B,C,D NO GUARDRAIL SYSTEM PRESENT.

STRUCTURE NO. 5140 008P

INSPECTION DATE: 11/2/16

TRUCK TYPE

TONS

INVENTORY RATING (NORMAL TRAFFIC)

METRIC TONS METRIC TONSTONS

OPERATING RATING (MAXIMUM LOAD)

H

HS

TYPE 3

TYPE 3S2

TYPE 3-3

DESIGN LOADING:

DATE OF LOAD RATING CALCULATION:

LOAD RATING CONTROLLED BY:

REMARKS:

CAPACITY MEETS OR EXCEEDS DESIGN LOAD

CAPACITY IS LESS THAN DESIGN LOAD

ORIGINAL LOAD RATING CALCULATION APPLICABLE

ORIGINAL LOAD RATING CALCULATION REVISED

NEGATIVE MOMENT

9/16

X

X

STRUCTURE LOAD RATING

OTTER CREEK CULVERT #2

UNKNOWN

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140 008P

STRUCTURE IDENTIFICATION

(201) PARK: BLUE RIDGE PARKWAY (1) STATE: ....................................... 513 - VIRGINIA (VA)

(202) STRUCTURE NAME: .......... OTTER CREEK CULVERT #2 (2) STATE HWY. AGENCY DIST:

(203) STRUCTURE KIND: ............2 - CULVERT (3) COUNTY CODE: ........................ 009 - AMHERST

(4) CITY/PLACE CODE:

(204) STRUCTURE NUMBER: ..... 5140-008P

(205) NPS REGION: .................... 4 - SOUTHEAST (5) INVENTORY ROUTE:

(206) ROUTE CODE NUMBER: ... 1 (6) FEATURES INTERSECTED:....... OTTER CREEK

(207) ROAD SECTION NO: ..........008P (7) FACILITY CARRIED: .................. BLUE RIDGE PARKWAY

(208) NPS ROAD CLASS: ............ 1 - PRINCIPAL PARK ROAD (8) STATE STRUCTURE NO: .......... 5140008P0000000

(209) WITHIN NPS BNDRY?: ....... YES (9) LOCATION: ................................ 43.0 MILES TO VA ROUTE 13

(210) OPERATING UNIT: ............. JAMES R. (10) INV. RTE. - MIN. VERT. CLR: .. 99.99 FT (99.99 M)

(211) PROJECT NO(S): ................ 1G6 (11) MILE POINT: ............................. 58.45 (KM PT 94.06)

(212) DRAWING NUMBERS: ....... 3001 (27) YEAR BUILT:

(21) MAINTAINED BY: ................. 66 - NATIONAL PARK SERVICE (106) YEAR RECONSTRUCTED: .... N/A

(22) OWNER: ............................... 66 - NATIONAL PARK SERVICE (20) TOLL: ........................................ 3 - FREE ROAD

(37) HISTORICAL DESIGNATION: .. 5 - NOT ELIGIBLE

STRUCTURE DESCRIPTION, FOUNDATION, AND DECK TYPE

(43A) MAIN STR. MATERIAL: ..

(43B) MAIN STR. TYPE:

(45) NO. OF MAIN SPANS:

(48) MAX. SPAN LENGTH:

(49) STRUCTURE LENGTH:

(216A) ABUTMENT #1 FDN:

(216B) ABUTMENT #2 FDN:

(217A) PREDOM. PIER FDN.: ..

(217B) SECOND. PIER FDN: ...

(107) DECK TYPE:

2 - CONCRETE CONTINUOUS

19 - CULVERT

21.0 FT (6.4 M)

45.5 FT (13.9 M)

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

2 - SPREAD FTG ON BEARING MAT'L

N - NOT APPLICABLE

(44A) APPR. STR. MATERIAL: ........ 0 - OTHER

(44B) APPR. STR. TYPE: ................ 00 - OTHER

(46) NO. OF APPROACH SPANS: .. 0

(108) WEAR SURFACE/PROTECT SYSTEM:

A) TYPE WEARING SURFACE: .. N - NOT APPLICABLE

B) TYPE MEMBRANE: ................. N - NOT APPLICABLE

C) TYPE PROTECTION:

N - NOT APPLICABLE

NO(218) IS SALT USED?:

LOAD RATING AND POSTING

(31) DESIGN LOAD:

0 - UNKNOWN (41) LOAD RESTRICTION:

R - POSTED (OTHER)

(66) INVENTORY RATING: ...... 76.0 TONS (68.9 METRIC TONS) (70) BRIDGE POSTING: .............. 5 - NO POSTING REQUIRED

(64) OPERATING RATING: ...... 99.9 TONS (99.9 METRIC TONS)

INSPECTION DATES

(90) INSPECTION DATE: 11/16 (91) FREQ. OF INSP: 24 MONTHS (92 / 93) CRITICAL FEATURE INSPECTION (CFI):

(219) ADD. STUDIES NEEDED: N - 0 - NONE (A) FRACTURE CRITICAL: ... NO

INSP. EVERY: MONTHS - LAST INSP. : (220) SPECIAL STUDY TYPE: 0 - NONE

(B) UNDERWATER: .............. NO

(221) SPECIAL STUDY DATE:

INSP. EVERY: MONTHS - LAST INSP. :

(C) SPECIAL INSPECTION: .. NO

INSP. EVERY: MONTHS - LAST INSP. :

STRUCTURE INVENTORY AND APPRAISAL STRUCTURE NO. 5140 008P

GEOMETRY, TRAFFIC, AND NAVIGATIONAL DATA

(16) LATITUDE: ............................. 37°36'13.90" (51) CURB TO CURB WIDTH: ........... 0.0 FT (0.0 M)

(17) LONGITUDE: ......................... 79°19'06.80" (52) DECK WIDTH: ............................ 0.0 FT (0.0 M)

(19) DETOUR LENGTH: ............... 25 MI (40 KM) (32) APPR. ROADWAY WIDTH: ........ 28.5 FT (8.7 M)

(28A) LANES ON STRUCT: .......... 02 (213) APPR. PAVEMENT WIDTH: ..... 20.5 FT (6.2 M)

(28B) LANES UNDER STRUCT: ... 00 LEFT SHOULDER: .................. 4.0 FT (1.2 M)

(42A) SERVICE ON: ..................... 1 - HIGHWAY RIGHT SHOULDER: ................ 4.0 FT (1.2 M)

(42B) SERVICE UNDER: .............. 5 - WATERWAY (33) BRIDGE MEDIAN: ....................... 0 - NO MEDIAN

(29) AVG. DAILY TRAFFIC: .......... 470 (34) SKEW ANGLE: ............................ 30 °

(30) YEAR OF ADT: ...................... 2012 (35) DECK FLARE?: ........................... NO

(114) FUTURE ADT: ..................... 521 (47) TOTAL HORIZ. CLEARANCE: .... 28.5 FT (8.7 M)

(115) YEAR OF FUTURE ADT: ..... 2032 (50) SIDEWALKS:

(101) PARALLEL STRUCTURE: ... N - NONE LEFT : ...................................... 0.0 FT (0.0 M)

(38) NAVIGATION CONTROL?: ... 0 RIGHT : ................................... 0.0 FT (0.0 M)

(39) VERTICAL CLEARANCE: ...... 0.0 FT (0.0 M) (214) BRIDGE RAIL TYPE:

(40) HORIZ. CLEARANCE: ........... 0.0 FT (0.0 M) RAIL CONFIGURATION: ......... 0 - N/A

(111) ABUT. OR PIER PROT: ....... MATERIAL: .............................. 0 - N/A

DESIGN TYPE: ........................ 0 - N/A

LATERAL UNDERCLEARANCE:

(55) RIGHT: ....................... 0.0 FT (0.0 M) (215) BRIDGE RAIL HEIGHT: ............ 0.00 FT (0.00 M)

(56) LEFT: ......................... 0.0 FT (0.0 M) (53) MIN. VRT. CLEAR. OVER DECK: 99.99 FT (99.99 M)

(54) MIN. VRT. UNDERCLEARANCE: 0.00 FT (0.00 M)

CONDITION AND APPRAISAL DATA, PROPOSED IMPROVEMENTS, AND COST

(58) DECK: .................................N

(59) SUPERSTRUCTURE: .........N

(60) SUBSTRUCTURE: ..............N

(61) CHANNEL:

(62) CULVERT:

(222) APPROACHES:

(223) RETAINING WALL: ........... N

(36) TRAFFIC SAFETY FEAT: ... 0000

(75A) TYPE OF WORK:

(75B) WORK DONE BY:

(76) IMPROVEMENT LENGTH: ..

(67) STRUCTURAL EVALUATION:

(68) DECK GEOMETRY:

(69) UNDERCLEARANCES:

(71) WATERWAY ADEQUACY:

(72) APPROACH ALIGNMENT:

(113) SCOUR CRITICAL:

(225) PURPOSE OF IMPROVEMENT:

(226) PRIORITY OF IMPROVEMENT:

(227) MAINTENANCE COST:

(228) REHAB./RECONSTR. COST: ...

(229) CONSTRUCTION COST:

N

5 - Stable; scour within limits of

2 - REHAB/RECONSTRUCTION

C - MODERATE

ADDITIONAL INFORMATION

(230) STRUCTURE HISTORY:

1984-JOINT REPAIR.

(231) ADDITIONAL CONSIDERATIONS:

(330) ADDITIONAL CONFIG. INFO.:

CULVERT LENGTH = 57'.

http:79�19'06.80 http:37�36'13.90

APPENDIX STRUCTURE NO. 5140 008P

PHOTOGRAPHS STRUCTURE NO. 5140 008P

FLOW

PHOTO #1 - LOOKING SOUTHBOUND TOWARD ROANOKE

PHOTO #2 - WEST (DOWNSTREAM) SIDE

PHOTO #3 - GENERAL TOP SIDE VIEW LOOKING SOUTH

PHOTO #4 - LONGITUDINAL AND TRANSVERSE CRACKING OF ASPHALT

PAVEMENT ALONG NORTHBOUND LANE OVER CULVERT.

STRUCTURE NO. 5140 008PPHOTOGRAPHS

PHOTO #5 - FULL WIDTH TRANSVERSE CRACK

AT SOUTH APPROACH

PHOTO #6 - GENERAL UNDERSIDE VIEW

LOOKING WEST, NORTH BARREL

PHOTO #7 - EXPOSED AND RUSTED REBAR ON SLAB UNDERSIDE IN

NORTH BARREL AT INTERMEDIATE WALL NEAR EAST SIDE

PHOTO #8 - EXPOSED AND RUSTED REBAR ON SLAB UNDERSIDE IN

NORTH BARREL AT INTERMEDIATE WALL NEAR WEST SIDE

PHOTO #9 - TYPICAL TRANSVERSE CRACKING

WITH EFFLORESCENCE ON SLAB UNDERSIDE;

NORTH BARREL, MID-LENGTH SHOWN

PHOTO #10 - GENERAL VIEW OF BARREL

WALL, NORTH WALL OF NORTH BARREL;

NOTE BUILD-UP OF EFFLORESCENCE IN

BREAST WALL MASONRY MORTAR JOINTS

PHOTO #11 - CRACKING OF MASONRY

MORTAR JOINTS AT WEST SIDE OF SOUTH

END WALL

OTTER CREEK CULVERT #2 INSPECTION DATE: 11/2/16

STRUCTURE NO. 5140 008P

PHOTO #12 - DETERIORATION OF NORTHEAST

WINGWALL MASONRY MORTAR JOINTS AT

WATERLINE; ALSO NOTE EXPOSED FOOTING

DUE TO SCOUR

PHOTOGRAPHS

PHOTO #13 - TYPICAL ACCUMULATION OF SEDIMENT AND STONE

ALONG NORTH WALL ON NORTH BARREL

PHOTO #14 - TYPICAL EFFLORESCENCE FROM RING STONE MASONRY

MORTAR JOINTS AT NORTH BARREL

PHOTO #15 - TYPICAL CRACKING OF

WINGWALL MASONRY MORTAR JOINTS;

NORTHEAST WINGWALL SHOWN

OTTER CREEK CULVERT #2 INSPECTION DATE: 11/2/16

STRUCTURE NO. 5140 008P

PHOTO #16 - FLOOD DEBRIS ACCUMULATION

AT UPSTREAM END OF INTERMEDIATE WALL.

PHOTOGRAPHS

PHOTO #17 - SEDIMENT ACCUMULATION, FALLEN TREE AND GROWING

TREES OBSTRUCTING CHANNEL FLOW ON WEST END OF BARREL #2

PHOTO #18 - SLOUGHING OF NORTH UPSTREAM CHANNEL BANK WITH

UNDERMINED TREES

PHOTO #19 - SLOUGHING OF NORTH DOWNSTREAM CHANNEL BANK

WITH UNDERMINED TREES

PHOTO #20 - LOOKING UPSTREAM

PHOTO #21 - LOOKING DOWNSTREAM