C04 - 8 - Bridge Inspection Report.pdf

STRUCTURE NUMBER- 051459000003017 TEAM LEADER- Todd Moxness

INSPECTION DATE- 03/03/2026 STRUCTURE CONDITION- G - Good

ROUTINE INSPECTION REPORT

Structure Name CASTLE CREEK

Route Number 39N25

Structure Mile Point 5.84

Admin Org 051459

State 6 - California

County 06089

Latitude 41.1678

Longitude -122.4282

Inspection Team Lead

Inspection Reviewer

Todd Moxness, 03/24/2026

Chad Houchin, 03/24/2026

© OpenStreetMap contributors

Location: NO DATA ENTERED

41.16780, -122.42820

MAP PAGE

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK Route Number: 39N25, Mile Point: 5.84

Structure Number: #051459000003017 / Routine

IDENTIFICATION

(1) State Names 6 - California

(8) Structure Number 051459000003017

(5) Inventory Route 1

(2) Highway Agency District

(3) County Code

(4) Place Code 0

(6) Features Intersected CASTLE CREEK

(7) Facility Carried WHALEN RD

(9) Location NO DATA ENTERED

(11) Mile Point 5.80981885 mi

(12) Base Highway Network No

(13) LRS Inventory Rte & Subrte

(16) Latitude 41.1678

(17) Longitude -122.4282

(98) Border Bridge State Code

(99) Border Bridge Structure No.

(43) Main Structure Type 51 Material 5 - Prestressed concrete

Type 1 - Slab

(44) Approach Structure Type 00

Material 0 - Other Type 0 - Other

(45) No. of Spans in Main Unit 1

(46) No. of Approach Spans 0

(107) Deck Structure Type 2 - Concrete Precast Panels

(108) Wearing Surface/Protective System

Type of Wearing Surface 6 - Bituminous Type of Membrane 0 - None

STRUCTURE TYPE AND MATERIAL

0 - NoneType of Deck Protection

AGE AND SERVICE

(27) Year Built 1999

(106) Year Reconstructed 0

(42) Type of Service 15

On 1 - Highway Under 5 - Waterway

(28) Lane On 1

Under 0

(29) Average Daily Traffic 50

(30) Year of ADT 0

(109) Truck ADT %

(19) Bypass, Detour Length 620.749629 mi

CLASSIFICATION

(112) NBIS Bridge Length Y

(104) Highway System 0

(26) Functional Class 9 - Rural Local

(100) Defense Highway 0 - The inventory route is not

(101) Parallel Structure N - No parallel structure exis

(102) Direction of Traffic 3 - One lane bridge for 2 - way traffic

(103) Temporary Structure

(105) Federal Lands Highways 0 - N/A

(110) Designated National Network 0 - The inventory route is not

(20) Toll 3 - On free road. The structu

(21) Maintain 64 - U.S. Forest Service

(22) Owner 64 - U.S. Forest Service

(37) Historical Significance 4 - Historical significance is

GEOMETRIC DATA

(48) Length of Maximum Span 0 ft

(49) Structure Length 37.073492 ft

(50) Curb or Sidewalk Width

Left 0 ft Right 0 ft

(51) Bridge Roadway Width Curb to Curb 19.356956 ft

(52) Deck Width Out to Out 20.013123999999998 ft

(32) Approach Roadway Width (W/Shoulders) 20.013123999999998 ft

(33) Bridge Median 0 - No median

(34) Skew 0 Deg

(35) Structure Flared 0 - No flare

(10) Inventory Route Min Vert Clear 99.99 ft

(47) Inventory Route Total Horiz Clear 99.9 ft

(53) Min Vert Clear Over Bridge Rdwy 99.99 ft

(54) Min Vert Underclear 0 ft Ref:

(55) Min Lat Underclear RT

0 ft

0 ft Ref:

(56) Min Lat Underclear LT

NAVIGATION DATA

(40) Navigation Horizontal Clearance 0 ft(116) Vert-Lift Bridge Nav Min Vert Clear 0 ft(39) Navigation Vertical Clearance

(111) Pier Protection 0 - No navigation control on w(38) Navigation Control

0 ft

LOAD RATING AND POSTING

(31) Design Load 4 - M 18 / H 20

(63) Operating Rating Method 8

(64) Operating Rating

Type 8 - Load and Resistance Factor Rating (LRF Rating 1.28

(65) Inventory Rating Method 8 - Load and Resistance Factor

(66) Inventory Rating

Type Rating 0.99

(70) Bridge Posting

(41) Structure Open/Posted/Closed A - Open, no restriction

5 - Equal to or above legal loads

APPRAISAL

(67) Structural Evaluation 7

(68) Deck Geometry 9

(69) Clearances, Vertical/Horizontal N

(71) Waterway Adequacy 7

(72) Approach Roadway Alignment 7 (36A) Bridge Railings (36B) Transitions 1 - Inspected feature meets current (36C) Approach Guardrail 1 - Inspected feature meets current (36D) Approach Guardrail Ends

(113) Scour Critical Bridges 4 - Bridge foundations determined t

1 - Inspected feature meets current

1 - Inspected feature meets current

PROPOSED IMPROVEMENTS

(75) Type of Work

(76) Length of Structure Improvement 0 ft

(94) Bridge Improvement Cost (Multiply value by 1000) $

(95) Roadway Improvement Cost (Multiply value by 1000) $

(96) Total Project Cost (Multiply value by 1000) $

(97) Year of Improvement Cost Estimate

(114) Future ADT 75

(115) Year of Future ADT 2045

CONDITION

(62) Culverts 4(61) Channel & Channel Protection 7(60) Substructure 8(59) Superstructure 8(58) Deck

N

INSPECTIONS *

(90) Inspection Date

(91) Frequency

(92) Critical Feature Inspection A: Fracture Critical Detail B: Underwater Inspection C: Other Special Inspection

Done Freq. (Mon) Date

* The inspection date and frequency information in this box contains the current NBI date and frequency information. Please refer to the report header for the date this inspection was conducted.

No No

03/03/2026

NBI SI&A

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

B.ID.01 Bridge Number

IDENTIFICATION

051459000003017

B.ID.02 Bridge Name CASTLE CREEK

B.ID.03 Previous Bridge No.

1999B.W.01 Year Built

B.L.01 State Code

B.L.02 County Code

B.L.03 Place Code

B.L.04 Highway Agency District

B.L.05 Latitude

B.L.06 Longitude

B.L.07 Border Bridge Number

B.L.08 Border Bridge State or Country Code

B.L.09 Border Bridge Insp. Resp.

B.L.10 Border Bridge Designated Lead State

B.L.11 Bridge Location

B.L.12 Metropolitan Planning Organization

LOCATION

6 - California

41.1678

-122.4282

N

NO DATA ENTERED

B.RH.01A Bridge Railing Type

ROADSIDE HARDWARE

B.RH.01B Bridge Railing Year (YY)

A - Not crash-tested but meets AASH

B.RH.01C Bridge Railing Test Level

B.RH.02A Transition Type

B.RH.02B Transition Year (YY)

B.RH.02C Transition Test Level

0 - None - roadside hardware is req

B.G.01 NBIS Bridge Length

BRIDGE GEOMETRY

B.G.02 Total Bridge Length

B.G.03 Max Span Length

B.G.04 Min Span Length

B.G.05 Bridge Width Out-to-Out

B.G.06 Bridge Width Curb-to-Curb

B.G.07 Left Curb or Sidewalk Width B.G.08 Right Curb or Sidewalk Width

B.G.09 Approach Roadway Width

34.4

36.4

35.4

35.4

19.3

18.9

B.G.14 Sidehill Bridge N - Not a sidehill bridge

B.G.15 Irregular Deck Area

728.0B.G.16 Calculated Deck Area

B.G.10 Bridge Median

B.G.11 Skew

B.G.12 Curved Bridge

B.G.13 Max Bridge Height

0 - No median

N - Not curved

B.LR.01 Design Load

B.LR.02 Design Method

B.LR.03 Load Rating Date

B.LR.04 Load Rating Method

B.LR.05 Inventory Load RF

B.LR.06 Operating Load RF

B.LR.07 Controlling Legal Load RF

B.LR.08 Routine Permit Loads

LOADS AND LOAD RATING

H20 - H-20

4/17/2016 11:00:00 AM

LRFR - Load and Resistance Factor R

0.99

1.28

1.9

B.IR.01 NSTM Inspection Required

INSPECTION REQUIREMENTS

N - NSTM inspection not required.

B.IR.02 Fatigue Details

B.IR.03 UW Inspection Required N - Underwater inspection not requi

B.IR.04 Complex Feature

B.C.01 Deck Condition Rating

COMPONENT CONDITION RATINGS

B.C.02 Superstructure Condition

B.C.03 Substructure Condition

B.C.04 Culvert Condition Rating

B.C.05 Bridge Railing Condition

B.C.06 Bridge Railing Transitions Condition

B.C.07 Bridge Bearings Cond.

B.C.08 Bridge Joints Condition

B.C.09 Channel Condition Rating

B.C.10 Channel Protection Condition

B.C.11 Scour Condition Rating

B.C.12 Bridge Condition Class

B.C.13 Lowest Condition Rating

B.C.14 NSTM Insp. Condition

B.C.15 UW Inspection Condition

8 - VERY GOOD - Some inherent

8 - VERY GOOD - Some inherent

7 - GOOD - Some minor defects.

N - NOT APPLICABLE - Component

8 - VERY GOOD - Some inherent

4 - POOR - Widespread moderate

8 - VERY GOOD - Some inherent

N - NOT APPLICABLE - Bridge do

3 - SERIOUS - Major defects; b

1 - IMMINENT FAILURE - Channel

3 - Major scour; strength and/

G - Good

7 - GOOD - Some minor defects.

N - NOT APPLICABLE - Component

N - NOT APPLICABLE - Component

B.AP.01 Appr. Roadway Alignment

APPRAISAL

B.AP.02 Overtopping Likelihood

B.AP.03 Scour Vulnerability

B.AP.04 Scour Plan of Action

B.AP.05 Seismic Vulnerability

G - Good

2 - Very low – once every 51 to 99

0 - Scour appraisal has not been co

0 - A scour POA is not required.

0 - Seismic evaluation not complete

B.CL.01 Owner

CLASSIFICATION

B.CL.02 Maint. Responsibility

B.CL.03 Federal or Tribal Land Access

B.CL.04 Historic Significance

B.CL.05 Toll

B.CL.06 Emergency Evacuation Designation

FL07 - U.S. Forest Service (USFS)

FL07 - U.S. Forest Service (USFS)

N - Not Applicable

7 - Historic significance of the br

N - Bridge does not carry a toll ro

SNBI SI&A

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

B.SP.02 # of Spans 1

B.SP.03 # of Beam Lines 5

C03 - Prestressed concrete – pB.SP.04 Span Material

B.SP.05 Span Continuity

B.SP.06 Span Type

B.SP.07 Span Protective System

1 - Simple or single span

S02 - Slab – voided

0 - None

B.SP.08 Deck Interaction IM - Integral or monolithic

B.SP.09 Deck Material and Type C03 - Prestressed concrete – p

B01 - Bituminous (asphalt)B.SP.10 Wearing Surface

B.SP.11 Deck Protective System

B.SP.12 Deck Reinforcing Protective System

B.SP.13 Deck Stay-In-Place Forms

0 - None

0 - None

0 - None

M1

SPAN SETS

B.SB.02 No. of Substructure Units 2

B.SB.03 Substructure Material C01 - Reinforced concrete – ca

A01 - Abutment – cantilever/waB.SB.04 Substructure Type

B.SB.05 Substructure Protective System 0 - None

B.SB.06 Foundation Type F01 - Footing – not on rock

0 - NoneB.SB.07 Foundation Protective System

A1

SUBSTRUCTURE SETS

B.F.02 Feature Location C - Carried on bridge

B.F.03 Feature Name WHALEN RD

7 - LocalB.H.01 Functional Classification

B.H.02 Urban Code

B.H.03 NHS Designation

B.H.04 National Highway Freight Network

99999

N - Non-NHS

N - Not on the NHFN

B.H.09 Annual ADT 50

B.H.10 Annual ADTT

B.H.11 Year of Annual ADT

B.H.12 Highway Max Usable Vertical Clearance B.H.13 Highway Min Vertical Clearance B.H.14 Highway Min Horizontal Clearance, Left

99.9

99.9

N - Not a STRAHNET routeB.H.05 STRAHNET Designation

B.H.06 LRS Route ID

B.H.07 LRS Mile Point

B.H.08 Lanes On Highway

5.81

B.H.15 Highway Min Horizontal Clearance, Right B.H.16 Highway Max Usable Surface Width

B.H.17 Bypass Detour Length

B.H.18 Crossing Bridge Number

99.9

H1

HIGHWAY FEATURES

B.F.02 Feature Location B - Below bridge

B.F.03 Feature Name CASTLE CREEK

N - Not navigable watersB.N.01 Navigable Waterway

B.N.02 Navigation Min Vertical Clearance

B.N.03 Movable Bridge Max Navigation Vertical Clearance

B.N.04 Navigation Channel Width

B.N.05 Navigation Channel Min Horizontal Clearance B.N.06 Substructure Navigation Protection

W1

WATERWAY FEATURES

Highway Parent B.RT.01 Route Designation

B.RT.02 Route Number B.RT.03 Route Direction B.RT.04 Route Type B.RT.05 Service Type

H1 1 39N25 2-T - TEMP - Two-way traffic - NS or EW 6 - Federal lands road X - Other

HIGHWAY ROUTES

POSTING STATUS DATA

B.PS.01 Load Posting Status B.PS.02 Posting Status Change Date

PO - Permanent - Open

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

LOAD EVALUATION AND POSTING

B.EP.01 Legal Load Configuration B.EP.02 Legal Load Rating Factor B.EP.03 Posting Type B.EP.04 Posting Value

AASHTO Type 3 1.9

AASHTO Type 3S2 2.01

AASHTO Type 3-3 2.32

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

INSPECTION SUMMARY

Inspection Type:

Inspection Begin Date:

Inspection Completion Date:

Inspection Team Lead:

Routine

03/03/2026

03/03/2026

Todd Moxness

Inspection Equipment:

Inspection Interval: 12

Latitude: 41.1678

Longitude: -122.4282

Region: R5, PACIFIC SOUTHWEST REGION

Security ID: 0514 - SHASTA TRINITY NATIONAL FOREST

Inspection Team: TODD E. MOXNESS, CHAD HOUCHIN

Complex Features:

NSTM Inspection Required: N - NSTM inspection not required.

Previous Bridge Number:

Development Status: EXISTING - ACTIVE

Structure Jurisdiction: FS - FOREST SERVICE

Inspection Responsibility: FS - FOREST SERVICE

Done By: FS - FOREST SERVICE

Fatigue Prone Details:

Underwater Inspection Required: N - Underwater inspection not required

Bridge Condition Classification: G - Good Lowest Condition Rating Code: 7

Inspection Remarks: Arrived at 11:15. Sunny, clear, warm and breezy. Scour hole now 3 ft. from A2 abut., 5 Ft. from A1 abut.

both measured from the corner of DS backwall/abutment interface. The thing now is both sides are undercut and there is a gap between the abutment walls/footing and the grouted riprap meaning it is pulled away and unstable and could collapse at any time. The scour hole has also head cut from the middle of the bridge to approximately 10' above the bridge. A total of around 18 feet of head cutting. We conducted cross-sections on the Downstream side and Upstream side of bridge and found that the scour hole was now 4 ' below the lowest footing, A1 side. All 4 object markers out of position, shot up. All without reflectivity. Minor hairline cracks in abutments. Water running down road onto bridge. Ditch plugged up needs opening. Much drift up and down stream. Northeast, A2 upstream guardrail was destroyed by collision with vehicle. Finished inspection at 2:15.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

CONDITION & APPRAISAL DETAILS

B.C.01 Deck Condition Rating (8 - VERY GOOD - Some inherent defects.)

B.C.02 Superstructure Condition Rating (8 - VERY GOOD - Some inherent defects.)

B.C.03 Substructure Condition Rating (7 - GOOD - Some minor defects.)

Some minor hairline cracking of the backwalls and wing walls.

B.C.04 Culvert Condition Rating (N - NOT APPLICABLE - Component does not exist.)

B.C.05 Bridge Railing Condition Rating (8 - VERY GOOD - Some inherent defects.)

B.C.06 Bridge Railing Transitions Condition Rating (4 - POOR - Widespread moderate or isolated major defects;

strength and/or performance of the component is affected. ) The Upstream, A2 (east side) of the guardrail has collision damage and approximately 15 feet has been destroyed along with the terminal end section and two posts.

B.C.07 Bridge Bearings Condition Rating (8 - VERY GOOD - Some inherent defects.)

B.C.08 Bridge Joints Condition Rating (N - NOT APPLICABLE - Bridge does not have deck joints.)

B.C.09 Channel Condition Rating (3 - SERIOUS - Major defects; bridge or approach roadway is seriously threatened.

Condition typically necessitates more frequent monitoring, load restrictions, and/or corrective actions.)

Scour hole has head cut approximately 18 feet up stream and is now around 10 feet upstream of bridge. It has also undercut the remaining grouted rip rap at both abutments. Scour hole is now about 4 feet below the lower Abutment A1 side.

B.C.10 Channel Protection Condition Rating (1 - IMMINENT FAILURE - Channel protection has failed, but corrective action could restore it to working condition.)

B.C.11 Scour Condition Rating (3 - Major scour; strength and/or stability of the bridge is seriously affected. Condition typically necessitates more frequent monitoring, load restrictions, and/or corrective actions.)

Major scour affecting the future stability of the bridge. With the undercutting of the remaining grouted riprap. once it completely fails the stability of the bridge abutments will be greatly threatened. Corrective actions are needed to be employed soon.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

B.C.14 NSTM Inspection Condition (N - NOT APPLICABLE - Component does not exist.)

B.C.15 Underwater Inspection Condition (N - NOT APPLICABLE - Component does not exist.)

Wearing Surface Condition (8 -VERY GOOD)

Approach Roadway Condition (GOOD)

One small area of alligator cracking to the North, A2 approach asphalt.

B.AP.01 Approach Roadway Alignment (G - Good)

B.AP.02 Overtopping Likelihood (2 - Very low – once every 51 to 99 years)

B.AP.03 Scour Vulnerability (0 - Scour appraisal has not been completed.)

B.AP.04 Scour Plan of Action (0 - A scour POA is not required.)

B.AP.05 Seismic Vulnerability (0 - Seismic evaluation not completed.)

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

STREAM CROSS SECTION

Station Remark Horizontal Distance (ft) Vertical Distance US (ft) Vertical Distance DS (ft) 0 A1, DS, L to R. Top Rail 0 11.3 12.6

4 4 11.4 13.1

5.5 5.5 14 6 6 21.9 8 8 13.5 23.6 12 12 14.9 22.6 13 13 15.1

13.5 13.5 19.5 16 16 20.9 22.1 20 20 23 24 24 21 23.2 27 27 19.8

27.5 27.5 13.9 22 28 28 13.1 20.4 29 29 14.8

29.5 29.5 11.4 32 32 11.2 12.3 34 34 10.6 11.7

0 10 20 30 40

Distance (ft)

El ev at io n (ft

Upstream Cross Section

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

0 10 20 30 40

Distance (ft)

El ev at io n (ft

Downstream Cross Section

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Date Reported: 06/15/2026

Priority: Medium

Type of Work: Replace

Status: Open

Remarks

Component: Approach Rail

Deficiency Description

Replace the Northeast, US A2 guardrail and terminal end-section that was destroyed by vehicle collision.

MAINTENANCE ITEMS

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Priority: High

Type of Work: Repair

Status: Open

Remarks

Component: Channel

Deficiency Description

Restore the channel by filling in the large Scour hole that is head cutting under the bridge with grouted rip rap. Approximate dimensions 25' x30' x 12' deep.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Date Reported: 06/12/2028

Type of Work: Rehab - Rehabilitation

Status: Open

Remarks

Component: Channel

Deficiency Description

Remove the alluvial fan of material and stand of vegetation from above the bridge area realigning the channel.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Type of Work: Replace

Status: Open

Remarks

Component: Miscellaneous

Deficiency Description

Replace all four object markers to meet reflectivity standards and put in proper position

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Date Reported: 03/06/2028

Type of Work: Repair

Status: Open

Remarks

Component: Approach

Deficiency Description

Clean out and re-establish inside ditch of A1 approach so that water does not run onto bridge deck.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

CRITICAL FINDINGS

Critical Finding ID:

Forest Specific Event Name: CA2026-1-FS

CF Status: TL-Draft

CF Inspection Date: 03/03/2026

CF Inspection Interval: 12

CF Found Date: 02/26/2026

Event Description/Cause (B4):

Atmospheric River

CF Criterion (B5): I - Immediate work needed to prevent substantial reduction in safe load capacity

If Other (B5A):

Event Type/Cause (B12): A - Scour If Other (B12A):

Deterioration (B13): If Other (B13A):

Detailed Deficiency (B14): If Other (B14A):

CF Results (B15): D - Settlement or loss of support If Other (B15A):

Initial Actions (B17):

Resolved Actions (B19):

Future Actions (B20):

CF Remarks:

Condition Summary: B.C.01 - 8 B.C.02 - 8 B.C.03 - 7 B.C.04 - N B.C.09 - 3 B.C.11 - 3

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

A1 approach A2 approach

Structure topside view Structure underside view

PHOTOS

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Upstream elevation view Downstream elevation view

A1 abutment elevation stream flow from the right A2 abutment elevation stream flow from the left

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Stream view looking upstream Stream view looking downstream

Separation from the abutment footing to the grouted rip rap, typical to both sides, showing riprap to be unstable.

Split guard rail posts from over tightening.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

A2, Upstream approach railing destroyed by vehicular collision. Alligator cracking of the A2 approach pavement

Scour and under cutting of A1 downstream side.

Approx. 5 feet from abutment corner.

Scour and under cutting of A2 downstream side.

Approx 3 feet from abutment corner.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK

Scour hole head cutting upstream of bridge now. Downstream view of the scour hole and the undercutting

Scour hole head cutting approximately 10 feet upstream of bridge now.

Team Lead: Todd Moxness, Inspection Date: 03/03/2026

Bridge Name: CASTLE CREEK