Package-I Mokokchung–Chare — Preliminary Distress Inspection, Km 0+000 to 20+640

26Distressed locations

11Need immediate attention

9Sinking / settlement zones

20.640Km inspected

3 / 3EE-flagged zones confirmed

Corridor overview

Every distressed location along the 20.640 km. Bar colour is priority; a dark underline marks sinking or settlement; an amber outline marks a critical location. Select any band to jump to its record.

02468101214161820

Plan — submitted P&P alignment

Centreline as per the submitted Plan & Profile. Numbers are kilometre marks; dots are distressed locations, positioned from GPS recorded during the inspection.

Coverage and basis

What this preliminary report rests on, and what it does not cover.

Inspected: the full 20.640 km, by vehicle with running commentary, on 14 November 2026 between 12:32 and 13:55 hrs — 27 video clips (61 minutes) and 22 site photographs.
Chainage: taken from GPS recorded on site and projected onto the submitted Plan & Profile alignment. Field-stamped chainages on the site photographs agree with this alignment within 0–100 m.
Not covered — Km 5+000 to 6+000: no video record is available for this reach; the clip covering it is missing from the camera roll. This kilometre should be inspected before the report is finalised.
Extents of distress are approximate, read from the position of the vehicle while the location was being described. They require confirmation by measurement on site.
Suggested actions are indicative only. They are not a detailed design and carry no quantities or cost.
Basis column: “Corroborated” means the observation is supported by a site photograph or was stated clearly and repeatedly on site. “Review” means it rests on field commentary alone and should be confirmed.

Chainage-wise register

Location, observed problem, suggested action and priority. Select a row to open its record and photographs.

26 locations

Chainage (Km)	Observed problem	Side	Description	Suggested action	Priority	Basis
1+400	Landslide	Hill (L)	Continuous slide location reported at start of hill-cut reach.	Breast wall / slope dressing with catch drain	Before widening	Corroborated
2+130	Landslide + sinking	Hill (L)	Left-side slide location; sinking referred to in same breath.	Breast wall; verify pavement settlement	Before widening	Review
3+000 – 3+400	Landslide	Both	Slide locations through 3+000–3+400; RE instructed team to take measurements and prepare proposal.	Measure extents; slope protection proposal	Before widening	Review
4+150 – 4+280	Landslide + seepage	Hill (L)	Slide location with water seepage; water reported passing from inside/under the road. NoteCam photo at field C…	Catch-water drain above slope; sub-surface drainage; reinstate breast wall	Immediate	Corroborated
8+050	Landslide	Hill (L)	Slide location reported at approx 8+050.	Breast wall / slope protection	Before widening	Review
8+400	Landslide EE-flagged	Hill (L)	Landslide location with breast wall already constructed.	Raise/extend breast wall; catch drain	Before widening	Review
8+490 – 8+850	SINKING ZONE EE-flagged	Valley (R)	Sinking zone on valley side; road passes above the slipped mass; hairpin bend within the reach; nala/river cro…	Valley-side retaining/toe protection, nala training; NOT widenable by hill cutting	Immediate	Corroborated
9+600 – 9+700	SINKING + landslide	Both	Sinking problem with left-side slide location; right side also affected. Two NoteCam photos taken at field Ch …	Breast wall on hill side; valley-side retaining; drainage	Immediate	Corroborated
9+980 – 10+300	Landslide	Hill (L)	Slide location reported through the 10+000 reach.	Slope protection	Before widening	Review
10+300 – 10+800	SINKING ZONE EE-flagged	Valley (R)	Sinking problem in loose-soil reach.	Ground improvement + valley-side retaining; sub-surface drains	Immediate	Corroborated
11+400 – 11+500	Landslide	Hill (L)	Landslide measures required; frequent/repeated landsliding reported near 11+500.	Slope stabilisation; catch drain	Immediate	Corroborated
11+700	Landslide	Hill (L)	Slide location at approx 11+700.	Breast wall	Before widening	Corroborated
12+000 – 12+200	SETTLEMENT	Valley (L)	Settlement of carriageway on valley/river side through 12+000–12+200.	Valley-side retaining wall + toe protection	Immediate	Corroborated
12+380 – 12+485	SETTLEMENT	Valley	Distress reach of approx 45 m length noted up to Ch 12+485; newly constructed work referred to in the same rea…	Confirm extent; retaining structure	Before widening	Review
12+490 – 12+520	WIDENING CONSTRAINT	Hill	Hill face at this location is direct vertical; toe protection work present.	Two-lane width to be gained on valley side by retaining structure	Immediate	Corroborated
13+000 – 13+200	Landslide	Valley (R)	Valley side actively sliding at 13+000; further slide location around 13+200.	Valley-side retaining / toe protection	Immediate	Corroborated
13+300 – 13+600	CRITICAL — slide + SINKING EE-flagged	Both	Described as a critical location: left-side slide location, with sinking zone on the right toward 13+600.	Detailed investigation before widening; combined hill and valley treatment	Immediate	Corroborated
14+200	Distress	Left	Distress reported on left-hand side at approx 14+200.	Confirm on site	Monitor / confirm	Review
14+600 – 15+050	SINKING ZONE	—	Major sinking issue around 15+000–15+050, described as connected to the reach from 14+600. Two site photograph…	Investigation; ground improvement + retaining	Immediate	Corroborated
16+400 – 16+600	Damage / distress	—	Damage discussed through 16+400–16+600; RE directed photographs and measurement of extent.	Measure extent	Monitor / confirm	Review
17+100	Landslide	Hill (R)	Landslide location on right-hand side at approx 17+100.	Breast wall / slope protection	Before widening	Corroborated
17+250	Landslide	Hill (R)	Landslide on right side at approx 17+250.	Breast wall	Before widening	Corroborated
17+800	Landslide	—	Landslide location reported; spoken chainage ambiguous (heard as '18+800' at GPS 17+482) — to be confirmed.	Confirm chainage on site	Monitor / confirm	Low
18+200 – 18+300	Landslide	—	Landslide location between 18+200 and 18+300.	Slope protection	Before widening	Corroborated
19+400 – 19+500	CRITICAL — major slide	Left	Critical left-side slide location; road passes above the slipped mass; water flowing alongside. Described as s…	Detailed investigation; drainage interception + retaining before widening	Immediate	Corroborated
20+100	Landslide	—	Slide location at approx 20+100, near project end.	Slope protection	Before widening	Review

Widening feasibility — where width cannot be won by hill cutting

Locations where two-lane width will have to be gained on the valley side by retaining structures rather than by cutting into the hill. Only the first is stated as such on site; the remainder are nominated from the nature of the distress and require confirmation against cross-sections before widening is planned.

Chainage (Km)	Why hill cutting will not give the width	Status
12+490 – 12+520	Hill face at this location is direct vertical; toe protection work already present. Cutting back is not practicable.	Stated on site
8+490 – 8+850	Hairpin bend with the carriageway founded above a sinking valley-side mass, nala crossing immediately below. Cutting the inside of a hairpin does not deliver width on the valley limb.	To be confirmed
10+300 – 10+800	Valley-side sinking in a loose-soil reach; the valley edge is the limiting side.	To be confirmed
12+000 – 12+200	Carriageway already settling towards the river on the valley side.	To be confirmed
13+000 – 13+200	Valley side actively sliding; any added width on that side needs support.	To be confirmed
13+300 – 13+600	Slide on one side and sinking on the other — both flanks constrained at the same reach.	To be confirmed
14+600 – 15+050	Continuous sinking reach; widening over a settling mass requires treatment first.	To be confirmed
19+400 – 19+500	Road passes above a mass that slides continuously in the rainy season, with water flowing alongside.	To be confirmed

Location records

Each record carries the photograph or video frame captured at that location, with the field commentary recorded during the inspection.

Km 1+400

Landslide

Before wideningCorroborated

Condition at Km 1+400 — Frame taken at the moment this location was being described · IMG_5106.MP4 @ 75s

Site photograph at Km 1+412 — Site photograph · Km 1+412

Side: Hill (L)
Observed: Continuous slide location reported at start of hill-cut reach.
Likely cause: Slope instability in cut face
Suggested action: Breast wall / slope dressing with catch drain
Source: IMG_5106.MP4 @ 75s

Field note

Called out on site as a continuous slide location — movement along the cut face rather than a single scar. At this point the team agreed to announce the chainage aloud on every clip, and to photograph the slope from above wherever access allowed, so that each location could be identified afterwards.

Km 2+130

Landslide + sinking

Before wideningReview

Condition at Km 2+130 — Frame taken at the moment this location was being described · IMG_5112.MP4 @ 3s

Side: Hill (L)
Observed: Left-side slide location; sinking referred to in same breath.
Likely cause: Cut-slope instability
Suggested action: Breast wall; verify pavement settlement
Source: IMG_5112.MP4 @ 3s

Field note

Slide location identified on the left side, with settlement referred to in the same observation. The two should be checked together: a slip above the road and a settling carriageway below it often share one cause.

Km 3+000 – 3+400

Landslide

Before wideningReview

Condition at Km 3+000 – 3+400 — Frame taken at the moment this location was being described · IMG_5115.MP4 @ 17s

Side: Both
Observed: Slide locations through 3+000–3+400; RE instructed team to take measurements and prepare proposal.
Likely cause: Multiple cut-slope failures
Suggested action: Measure extents; slope protection proposal
Source: IMG_5115.MP4 @ 17s

Field note

Through this reach the RE directed that every slide location be measured rather than merely recorded — including the affected length at each — so that a treatment proposal could be prepared for the reach as a whole instead of a list of observations.

Km 4+150 – 4+280

Landslide + seepage

ImmediateCorroborated

Condition at Km 4+150 – 4+280 — Frame taken at the moment this location was being described · IMG_5116.MP4 @ 50s

Side: Hill (L)
Observed: Slide location with water seepage; water reported passing from inside/under the road. NoteCam photo at field Ch 4+150 shows hill-side slip, debris overtopping existing gabion/breast wall onto shoulder.
Likely cause: Sub-surface seepage saturating cut slope; drainage not intercepting flow
Suggested action: Catch-water drain above slope; sub-surface drainage; reinstate breast wall
Source: IMG_5116.MP4 @ 50s

Field note

Slide location with a clear water problem: water was reported seeping out of the slope and passing underneath the road at this point. The field photograph at stamped Ch 4+150 shows slipped material overtopping the existing gabion/breast wall and spilling onto the shoulder, which indicates the wall is already being overrun rather than holding the slope.

Km 8+050

Landslide

Before wideningReview

Condition at Km 8+050 — Frame taken at the moment this location was being described · IMG_5121.MP4 @ 25s

Side: Hill (L)
Observed: Slide location reported at approx 8+050.
Likely cause: Cut-slope instability
Suggested action: Breast wall / slope protection
Source: IMG_5121.MP4 @ 25s

Field note

Slide location called out shortly after the 8+000 mark.

Km 8+400 EE-flagged

Landslide

Before wideningReview

Condition at Km 8+400 — Frame taken at the moment this location was being described · IMG_5126.MP4 @ 50s

Site photograph at Km 8+497 — Site photograph · Km 8+497

Side: Hill (L)
Observed: Landslide location with breast wall already constructed.
Likely cause: Recurrent slip above existing breast wall
Suggested action: Raise/extend breast wall; catch drain
Source: IMG_5126.MP4 @ 50s

Field note

Landslide location at which a breast wall has already been constructed, with the slope above it still moving — the existing structure is not retaining the full height of the slip.

Km 8+490 – 8+850 EE-flagged

SINKING ZONE

ImmediateCorroborated

Condition at Km 8+490 – 8+850 — Frame taken at the moment this location was being described · IMG_5125.MP4 @ 5s

Site photograph at Km 8+498 — Site photograph · Km 8+498

Side: Valley (R)
Observed: Sinking zone on valley side; road passes above the slipped mass; hairpin bend within the reach; nala/river crossing immediately below. Crash-barrier blocks displaced at carriageway edge.
Likely cause: Toe erosion by nala undercutting valley-side fill; hairpin concentrates drainage
Suggested action: Valley-side retaining/toe protection, nala training; NOT widenable by hill cutting
Source: IMG_5125.MP4 @ 5s

Field note

Described on site as the sinking location. The settlement is on the valley side and the road passes directly above the moving mass. A hairpin bend falls within the reach and a nala crossing lies immediately below it, so water is being concentrated at the toe of the very fill that is settling. Displaced crash-barrier blocks were visible at the carriageway edge.

Km 9+600 – 9+700

SINKING + landslide

ImmediateCorroborated

Condition at Km 9+600 – 9+700 — Frame taken at the moment this location was being described · IMG_5127.MP4 @ 100s

Field NoteCam photograph at Km 9+684 — Field NoteCam photograph · Km 9+684

Side: Both
Observed: Sinking problem with left-side slide location; right side also affected. Two NoteCam photos taken at field Ch 9+600 (KML 9+684/9+700).
Likely cause: Combined cut-slope failure and embankment settlement
Suggested action: Breast wall on hill side; valley-side retaining; drainage
Source: IMG_5127.MP4 @ 100s

Field note

A slide location on the left together with a sinking problem affecting the right side, within the same reach. Two field photographs were taken here at stamped Ch 9+600. Distress on both flanks at one chainage narrows the options for gaining width.

Km 9+980 – 10+300

Landslide

Before wideningReview

Condition at Km 9+980 – 10+300 — Frame taken at the moment this location was being described · IMG_5129.MP4 @ 10s

Side: Hill (L)
Observed: Slide location reported through the 10+000 reach.
Likely cause: Cut-slope instability
Suggested action: Slope protection
Source: IMG_5129.MP4 @ 10s

Field note

Slide location recorded on entering the 10+000 reach.

Km 10+300 – 10+800 EE-flagged

SINKING ZONE

ImmediateCorroborated

Condition at Km 10+300 – 10+800 — Frame taken at the moment this location was being described · IMG_5129.MP4 @ 120s

Side: Valley (R)
Observed: Sinking problem in loose-soil reach.
Likely cause: Loose/colluvial soil; poor sub-grade drainage
Suggested action: Ground improvement + valley-side retaining; sub-surface drains
Source: IMG_5129.MP4 @ 120s

Field note

Sinking in a reach of loose soil — the ground itself was described as loose, so the distress is a property of the reach rather than a discrete slip at one point. The limits need to be measured before any widening is planned over it.

Km 11+400 – 11+500

Landslide

ImmediateCorroborated

Condition at Km 11+400 – 11+500 — Frame taken at the moment this location was being described · IMG_5130.MP4 @ 50s

Side: Hill (L)
Observed: Landslide measures required; frequent/repeated landsliding reported near 11+500.
Likely cause: Recurrent cut-slope failure
Suggested action: Slope stabilisation; catch drain
Source: IMG_5130.MP4 @ 50s

Field note

Landslide treatment called for at about Km 11+400. Sliding around 11+500 was described as frequent and recurring rather than a single past event, which points to a treatment designed for repeated movement rather than a one-time clearance.

Km 11+700

Landslide

Before wideningCorroborated

Condition at Km 11+700 — Frame taken at the moment this location was being described · IMG_5130.MP4 @ 78s

Side: Hill (L)
Observed: Slide location at approx 11+700.
Likely cause: Cut-slope instability
Suggested action: Breast wall
Source: IMG_5130.MP4 @ 78s

Field note

Slide location at approximately Km 11+700.

Km 12+000 – 12+200

SETTLEMENT

ImmediateCorroborated

Condition at Km 12+000 – 12+200 — Frame taken at the moment this location was being described · IMG_5131.MP4 @ 17s

Side: Valley (L)
Observed: Settlement of carriageway on valley/river side through 12+000–12+200.
Likely cause: Valley-side fill settlement; river below
Suggested action: Valley-side retaining wall + toe protection
Source: IMG_5131.MP4 @ 17s

Field note

Settlement of the carriageway reported as having already occurred, on the left-hand side, which is the river/valley side through this reach, continuing to about Km 12+200.

Km 12+380 – 12+485

SETTLEMENT

Before wideningReview

Condition at Km 12+380 – 12+485 — Frame taken at the moment this location was being described · IMG_5131.MP4 @ 62s

Side: Valley
Observed: Distress reach of approx 45 m length noted up to Ch 12+485; newly constructed work referred to in the same reach.
Likely cause: Fill settlement
Suggested action: Confirm extent; retaining structure
Source: IMG_5131.MP4 @ 62s

Field note

An affected length of about 45 m was called out, running up to Ch 12+485. Newly constructed work was referred to in the same reach, so the extent recorded here should be checked against what has recently been built before the limits are fixed.

Km 12+490 – 12+520

WIDENING CONSTRAINT

ImmediateCorroborated

Condition at Km 12+490 – 12+520 — Frame taken at the moment this location was being described · IMG_5131.MP4 @ 63s

Side: Hill
Observed: Hill face at this location is direct vertical; toe protection work present.
Likely cause: Vertical rock/soil face — hill cutting not practicable
Suggested action: Two-lane width to be gained on valley side by retaining structure
Source: IMG_5131.MP4 @ 63s

Field note

The hill face here was described as direct vertical, with toe protection work already in place. This is the controlling observation for widening at this chainage: the additional width cannot be taken out of the hill, so it must be gained on the valley side by a retaining structure.

Km 13+000 – 13+200

Landslide

ImmediateCorroborated

Condition at Km 13+000 – 13+200 — Frame taken at the moment this location was being described · IMG_5132.MP4 @ 3s

Side: Valley (R)
Observed: Valley side actively sliding at 13+000; further slide location around 13+200.
Likely cause: Valley-side slope failure
Suggested action: Valley-side retaining / toe protection
Source: IMG_5132.MP4 @ 3s

Field note

Active sliding on the right-hand side, which is the valley side through this reach, with further slide locations around Km 13+200.

Km 13+300 – 13+600 EE-flagged

CRITICAL — slide + SINKING

ImmediateCorroborated

Condition at Km 13+300 – 13+600 — Frame taken at the moment this location was being described · IMG_5133.MP4 @ 13s

Side: Both
Observed: Described as a critical location: left-side slide location, with sinking zone on the right toward 13+600.
Likely cause: Combined hill-slope failure and valley-side settlement
Suggested action: Detailed investigation before widening; combined hill and valley treatment
Source: IMG_5133.MP4 @ 13s

Field note

Called a critical location on site: a slide on the left side with a sinking zone on the right towards Km 13+600 — distress on both flanks within one reach. This is one of the three zones the Executive Engineer asked to be examined, and the observation supports that concern.

Km 14+200

Distress

Monitor / confirmReview

Condition at Km 14+200 — Frame taken at the moment this location was being described · IMG_5134.MP4 @ 38s

Side: Left
Observed: Distress reported on left-hand side at approx 14+200.
Likely cause: To be confirmed
Suggested action: Confirm on site
Source: IMG_5134.MP4 @ 38s

Field note

Distress called out on the left-hand side at about Km 14+200. The description recorded was not specific enough to classify the defect; it needs to be confirmed on site.

Km 14+600 – 15+050

SINKING ZONE

ImmediateCorroborated

Condition at Km 14+600 – 15+050 — Frame taken at the moment this location was being described · IMG_5137.MP4 @ 14s

Site photograph at Km 14+988 — Site photograph · Km 14+988

Side: —
Observed: Major sinking issue around 15+000–15+050, described as connected to the reach from 14+600. Two site photographs taken at 15+000.
Likely cause: Continuous settlement reach
Suggested action: Investigation; ground improvement + retaining
Source: IMG_5137.MP4 @ 14s

Field note

Sinking described as a major issue at about Km 15+000–15+050, and as connecting back to the reach from Km 14+600 — that is, one continuous settling length rather than two separate points. Two site photographs were taken at 15+000.

Km 16+400 – 16+600

Damage / distress

Monitor / confirmReview

Condition at Km 16+400 – 16+600 — Frame taken at the moment this location was being described · IMG_5138.MP4 @ 88s

Side: —
Observed: Damage discussed through 16+400–16+600; RE directed photographs and measurement of extent.
Likely cause: To be confirmed
Suggested action: Measure extent
Source: IMG_5138.MP4 @ 88s

Field note

Damage discussed through this reach, with the RE directing that its extent be photographed and measured. The exchange also referred back to the 14+500–14+600 reach, so the two should be read together when the extents are fixed.

Km 17+100

Landslide

Before wideningCorroborated

Condition at Km 17+100 — Frame taken at the moment this location was being described · IMG_5139.MP4 @ 25s

Side: Hill (R)
Observed: Landslide location on right-hand side at approx 17+100.
Likely cause: Cut-slope instability
Suggested action: Breast wall / slope protection
Source: IMG_5139.MP4 @ 25s

Field note

Landslide location on the right-hand side at about Km 17+100.

Km 17+250

Landslide

Before wideningCorroborated

Condition at Km 17+250 — Frame taken at the moment this location was being described · IMG_5139.MP4 @ 50s

Side: Hill (R)
Observed: Landslide on right side at approx 17+250.
Likely cause: Cut-slope instability
Suggested action: Breast wall
Source: IMG_5139.MP4 @ 50s

Field note

Landslide on the right side at about Km 17+250, a short distance beyond the previous location; the two may prove to be one affected length once measured.

Km 17+800

Landslide

Monitor / confirmLow

Condition at Km 17+800 — Frame taken at the moment this location was being described · IMG_5139.MP4 @ 120s

Side: —
Observed: Landslide location reported; spoken chainage ambiguous (heard as '18+800' at GPS 17+482) — to be confirmed.
Likely cause: To be confirmed
Suggested action: Confirm chainage on site
Source: IMG_5139.MP4 @ 120s

Field note

A landslide location was called out here, with measurement directed on the right side. The spoken chainage was heard as 18+800 while the vehicle was recorded at Km 17+482, so the chainage must be confirmed on site before this entry is relied upon.

Km 18+200 – 18+300

Landslide

Before wideningCorroborated

Condition at Km 18+200 – 18+300 — Frame taken at the moment this location was being described · IMG_5140.MP4 @ 45s

Side: —
Observed: Landslide location between 18+200 and 18+300.
Likely cause: Cut-slope instability
Suggested action: Slope protection
Source: IMG_5140.MP4 @ 45s

Field note

Landslide location placed between Km 18+200 and 18+300, described as a place where sliding recurs.

Km 19+400 – 19+500

CRITICAL — major slide

ImmediateCorroborated

Condition at Km 19+400 – 19+500 — Frame taken at the moment this location was being described · IMG_5142.MP4 @ 78s

Side: Left
Observed: Critical left-side slide location; road passes above the slipped mass; water flowing alongside. Described as sliding continuously in the rainy season.
Likely cause: Water-driven recurrent slope failure; road founded above failing mass
Suggested action: Detailed investigation; drainage interception + retaining before widening
Source: IMG_5142.MP4 @ 78s

Field note

Called a critical left-side slide location. The road passes above the moving mass and water was running alongside it, and the slide was described as moving continuously through the rainy season. On the evidence recorded this is the most serious of the slide locations on the package.

Km 20+100

Landslide

Before wideningReview

Condition at Km 20+100 — Frame taken at the moment this location was being described · IMG_5143.MP4 @ 10s

Side: —
Observed: Slide location at approx 20+100, near project end.
Likely cause: Cut-slope instability
Suggested action: Slope protection
Source: IMG_5143.MP4 @ 10s

Field note

Slide location at about Km 20+100, in the final reach before the project end at Km 20+640.