Drawing to BOQpipeline control sheet
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Existing Groundline

1 page · 2 crops · ×2 · earthwork

Matched toExisting Ground Surfacebridge.ground_system.existing_groundon “existing groundline”

1 read off the drawings · 1 not established
The class asks forValueHowFrom
Ground LevelGLwants m151.00 mThe elevation measurement explicitly states EL. 151.00, TYP. and applies to the approximate existing groundline.readp1 · p01_r08 elevation of bridge spans bents and fencing
ChainageCHwants mnot establishedThe readings identify the approximate existing groundline and give its elevation, but do not state a chainage for that groundline. The listed stations apply to SR 21, railroad, bridge limits, or plan locations rather than to the existing groundline.not found

Worked out by openai/gpt-5.6-terra-pro from the readings below, which are the source. A derived value shows its arithmetic — check it against the drawing before it is priced.

How the sheets named it

approximate existing groundline

Every dimension read for it1

  • 151.00elevationp1 · p01_r08 elevation of bridge spans bents and fencing

Notes on the sheets that carry it

  • p1TEMPORARY SHORING AS NECESSARY, TYP.
  • p1TO BE REMOVED
  • p1APPROXIMATE EXISTING GROUNDLINE
  • p1NOTES:
  • p11. ALL BENTS AR… RAILWAY
  • p12. END BENT PILE…
  • p1** 3. STATIONS ARE … AND B.F.P.R. O… ELEVATIONS A… PROFILE GRADE… PROFILE GRA…
  • p1*** 4. MEASURED AL…
  • p1⑤ 5. LEFT BRIDGE: MINIMUM REQU… EXISTING TRAC… FUTURE TRAC… RIGHT BRIDGE: MINIMUM REQU… EXISTING TRAC… FUTURE TRAC…
  • p1**⑥ 6. MINIMUM REQU…
  • p1CHAIN LINK WIRE FENCE, TYP.
  • p1FRONT FACE OF WALL NO. 1
  • p1FRONT FACE OF WALL NO. 2
  • p1EL. 151.00, TYP.

Every crop it was read in — the drawing beside what the model took off it

Page 1

crop

bridge_1_right

page 1 · bridge_1_right
Original
bridge_1_right
{
  "view": "Unclear",
  "objects": [
    {
      "name": "bridge deck / superstructure outline",
      "tag": "",
      "shape": "long rectangular, skewed in plan",
      "material": "",
      "count": 2,
      "note": "Two parallel bridge plan outlines are shown, identified by PGL WESTBOUND and PGL EASTBOUND."
    },
    {
      "name": "end wall",
      "tag": "WALL 1",
      "shape": "linear wall face",
      "material": "",
      "count": 2,
      "note": "Front face is called out in both plan views and elevation as WALL NO. 1."
    },
    {
      "name": "end wall",
      "tag": "WALL 2",
      "shape": "linear wall face",
      "material": "",
      "count": 2,
      "note": "Front face is called out in both plan views and elevation as WALL NO. 2."
    },
    {
      "name": "bent",
      "tag": "BENT 1L / BENT 1R",
      "shape": "line support in plan; end support in elevation",
      "material": "",
      "count": 2,
      "note": "Shown as B.F.P.R. BENT 1L and B.F.P.R. BENT 1R in plan; B.F.P.R. BENT 1 is shown in elevation."
    },
    {
      "name": "bent",
      "tag": "BENT 2L / BENT 2R",
      "shape": "line support in plan; column and pile cap in elevation",
      "material": "",
      "count": 2,
      "note": "Bent 2 is shown with a column, pile cap, and piles in elevation."
    },
    {
      "name": "bent",
      "tag": "BENT 3L / BENT 3R",
      "shape": "line support in plan; column and pile cap in elevation",
      "material": "",
      "count": 2,
      "note": "Bent 3 is shown with a column, pile cap, and piles in elevation."
    },
    {
      "name": "bent",
      "tag": "BENT 4L / BENT 4R",
      "shape": "line support in plan; end support in elevation",
      "material": "",
      "count": 2,
      "note": "Shown as B.F.P.R. BENT 4L and B.F.P.R. BENT 4R in plan; B.F.P.R. BENT 4 is shown in elevation."
    },
    {
      "name": "bent column",
      "tag": "",
      "shape": "rectangular",
      "material": "",
      "count": 2,
      "note": "One column is visible at each interior bent in the elevation."
    },
    {
      "name": "pile cap",
      "tag": "",
      "shape": "rectangular",
      "material": "",
      "count": 2,
      "note": "Shown below the two interior bent columns in elevation."
    },
    {
      "name": "pile",
      "tag": "",
      "shape": "vertical slender rectangular",
      "material": "",
      "count": 6,
      "note": "Three piles are visible below each of the two pile caps in elevation."
    },
    {
      "name": "chain link wire fence",
      "tag": "",
      "shape": "mesh panel",
      "material": "wire",
      "count": 3,
      "note": "Called out as typical in elevation."
    },
    {
      "name": "bearing condition",
      "tag": "EXP.",
      "shape": "",
      "material": "",
      "count": 4,
      "note": "Expansion bearing labels shown in elevation."
    },
    {
      "name": "bearing condition",
      "tag": "FIX",
      "shape": "",
      "material": "",
      "count": 2,
      "note": "Fixed bearing labels shown in elevation."
    },
    {
      "name": "existing track",
      "tag": "",
      "shape": "rail alignment",
      "material": "",
      "count": 1,
      "note": "Centerline is labeled in plan and elevation."
    },
    {
      "name": "future track",
      "tag": "",
      "shape": "rail alignment",
      "material": "",
      "count": 1,
      "note": "Centerline is labeled in plan and elevation."
    },
    {
      "name": "future access road",
      "tag": "",
      "shape": "alignment",
      "material": "",
      "count": 1,
      "note": "Centerline is labeled in plan and elevation."
    },
    {
      "name": "existing groundline",
      "tag": "",
      "shape": "irregular line",
      "material": "",
      "count": 1,
      "note": "Approximate existing groundline is shown in elevation."
    },
    {
      "name": "future groundline",
      "tag": "",
      "shape": "irregular line",
      "material": "",
      "count": 1,
      "note": "Shown between the interior bents in elevation."
    }
  ],
  "measurements": [
    {
      "label": "minimum clearance",
      "value": "12'-1\"",
      "unit": "",
      "appliesTo": "Central of Georgia Railroad Company existing track"
    },
    {
      "label": "distance",
      "value": "74'-7 15/16\"",
      "unit": "",
      "appliesTo": "plan dimension"
    },
    {
      "label": "distance",
      "value": "2'-23'-16.7\"",
      "unit": "",
      "appliesTo": "dimension ahead to Perkins; text is printed as shown"
    },
    {
      "label": "distance",
      "value": "75'-10 15/16\"",
      "unit": "",
      "appliesTo": "future track plan dimension"
    },
    {
      "label": "point of minimum vertical clearance",
      "value": "1'-9 1/2\"",
      "unit": "",
      "appliesTo": "plan callout"
    },
    {
      "label": "gutter to gutter",
      "value": "40'-0\"",
      "unit": "",
      "appliesTo": "westbound bridge"
    },
    {
      "label": "out to out",
      "value": "43'-7\"",
      "unit": "",
      "appliesTo": "westbound bridge"
    },
    {
      "label": "distance",
      "value": "6'-0\"",
      "unit": "",
      "appliesTo": "westbound bridge plan"
    },
    {
      "label": "distance",
      "value": "6'-0\"",
      "unit": "",
      "appliesTo": "westbound bridge plan"
    },
    {
      "label": "distance",
      "value": "34'-0\"",
      "unit": "",
      "appliesTo": "westbound bridge plan"
    },
    {
      "label": "skew angle",
      "value": "81°-20'-05.0\"",
      "unit": "",
      "appliesTo": "B.F.P.R. BENT 4L"
    },
    {
      "label": "station",
      "value": "18+16.85",
      "unit": "",
      "appliesTo": "SR 21"
    },
    {
      "label": "station",
      "value": "303+80.83",
      "unit": "",
      "appliesTo": "Central of Georgia Railroad Company"
    },
    {
      "label": "station",
      "value": "17+23.00",
      "unit": "",
      "appliesTo": "begin bridge"
    },
    {
      "label": "station",
      "value": "17+29.07",
      "unit": "",
      "appliesTo": "plan station"
    },
    {
      "label": "skew angle",
      "value": "81°-20'-05.0\"",
      "unit": "",
      "appliesTo": "plan, typical"
    },
    {
      "label": "distance",
      "value": "1'-9 1/2\"",
      "unit": "",
      "appliesTo": "plan dimension"
    },
    {
      "label": "skew angle",
      "value": "81°-20'-05.0\"",
      "unit": "",
      "appliesTo": "RRM P D-0080.54"
    },
    {
      "label": "bearing",
      "value": "N 83°-43'-21.7\" E",
      "unit": "",
      "appliesTo": "SR 21 alignment"
    },
    {
      "label": "distance",
      "value": "22'-0\"",
      "unit": "",
      "appliesTo": "plan dimension"
    },
    {
      "label": "station",
      "value": "19+08.93",
      "unit": "",
      "appliesTo": "SR 21"
    },
    {
      "label": "skew angle",
      "value": "81°-20'-05.0\"",
      "unit": "",
      "appliesTo": "PT#3"
    },
    {
      "label": "station",
      "value": "19+15.00",
      "unit": "",
      "appliesTo": "end bridge"
    },
    {
      "label": "skew angle",
      "value": "81°-20'-05.0\"",
      "unit": "",
      "appliesTo": "plan, typical"
    },
    {
      "label": "gutter to gutter",
      "value": "40'-0\"",
      "unit": "",
      "appliesTo": "eastbound bridge"
    },
    {
      "label": "out to out",
      "value": "43'-7\"",
      "unit": "",
      "appliesTo": "eastbound bridge"
    },
    {
      "label": "distance",
      "value": "1'-9 1/2\"",
      "unit": "",
      "appliesTo": "plan dimension"
    },
    {
      "label": "distance",
      "value": "6'-0\"",
      "unit": "",
      "appliesTo": "eastbound bridge plan"
    },
    {
      "label": "distance",
      "value": "6'-0\"",
      "unit": "",
      "appliesTo": "eastbound bridge plan"
    },
    {
      "label": "distance",
      "value": "34'-0\"",
      "unit": "",
      "appliesTo": "eastbound bridge plan"
    },
    {
      "label": "distance",
      "value": "14'-1\"",
      "unit": "",
      "appliesTo": "minimum clearance callout"
    },
    {
      "label": "distance",
      "value": "5'-0\"",
      "unit": "",
      "appliesTo": "minimum horizontal clearance callout"
    },
    {
      "label": "distance",
      "value": "15'-0\"",
      "unit": "",
      "appliesTo": "minimum horizontal clearance callout"
    },
    {
      "label": "distance",
      "value": "25'-8\"",
      "unit": "",
      "appliesTo": "minimum horizontal clearance to calculated face of column"
    },
    {
      "label": "distance",
      "value": "36'-4\"",
      "unit": "",
      "appliesTo": "minimum horizontal clearance to calculated face of column"
    },
    {
      "label": "total length of bridge",
      "value": "192'-0\"",
      "unit": "",
      "appliesTo": "bridge"
    },
    {
      "label": "span length",
      "value": "55'-0\"",
      "unit": "",
      "appliesTo": "bridge span"
    },
    {
      "label": "span length",
      "value": "82'-0\"",
      "unit": "",
      "appliesTo": "bridge span"
    },
    {
      "label": "span length",
      "value": "55'-0\"",
      "unit": "",
      "appliesTo": "bridge span"
    },
    {
      "label": "elevation",
      "value": "151.00",
      "unit": "",
      "appliesTo": "future groundline, typical"
    }
  ],
  "notes": [
    "TEMPORARY SHORING AS NECESSARY, TYP.",
    "TO BE REMOVED",
    "APPROXIMATE EXISTING GROUNDLINE",
    "NOTES:",
    "1. ALL BENTS AR… RAILWAY",
    "2. END BENT PILE…",
    "** 3. STATIONS ARE … AND B.F.P.R. O… ELEVATIONS A… PROFILE GRADE… PROFILE GRA…",
    "*** 4. MEASURED AL…",
    "⑤ 5. LEFT BRIDGE: MINIMUM REQU… EXISTING TRAC… FUTURE TRAC… RIGHT BRIDGE: MINIMUM REQU… EXISTING TRAC… FUTURE TRAC…",
    "**⑥ 6. MINIMUM REQU…"
  ],
  "labels": [
    "℄ FUTURE ACCESS ROAD",
    "℄ CENTRAL OF GEORGIA RAILROAD COMPANY EXISTING TRACK",
    "℄ FUTURE TRACK",
    "TO PERKINS",
    "TO US 25/SR 121",
    "PGL WESTBOUND",
    "PGL EASTBOUND",
    "℄ SR 21",
    "RRM P D-0080.54",
    "PT#3",
    "TO GA HIGHWAY 23",
    "BEGIN BRIDGE",
    "END BRIDGE",
    "POINT OF MIN. VERT. CLEARANCE",
    "FUTURE POINT OF MIN. VERT. CLEARANCE",
    "MIN. HORIZ. CL. TO CALCULATED FACE OF COLUMN",
    "PLAN",
    "ELEVATION",
    "CHAIN LINK WIRE FENCE, TYP.",
    "PGL",
    "℄ EXISTING TRACK",
    "FUTURE GROUNDLINE",
    "N."
  ],
  "description": "The crop contains a plan at the top and an elevation at the bottom, rather than a single elevation view. The plan documents two parallel skewed bridge layouts over the Central of Georgia Railroad Company existing track and a future track, with bents identified for left and right bridge alignments. The elevation shows the bridge span arrangement, end walls, interior bent columns on pile caps and piles, bearing conditions, fencing, and groundlines."
}

bridge_1_rightUnclear

  • existing groundline×1irregular lineApproximate existing groundline is shown in elevation.

12'-1" minimum clearance74'-7 15/16" distance2'-23'-16.7" distance75'-10 15/16" distance1'-9 1/2" point of minimum vertical clearance40'-0" gutter to gutter43'-7" out to out6'-0" distance+32 more

crop

p01_r08 elevation of bridge spans bents and fencing

page 1 · gdot_plan_1_050106c481ea4f86900e478c2e4a98a6_p01_r08_elevation_of_bridge_spans_bents_and_fencing
Original
p01_r08 elevation of bridge spans bents and fencing
{
  "view": "Elevation",
  "objects": [
    {
      "name": "bridge deck/superstructure",
      "tag": "",
      "shape": "continuous horizontal multi-span deck",
      "material": "",
      "count": 1,
      "note": "Shown spanning between two end walls and Bents 2 and 3."
    },
    {
      "name": "chain link wire fence",
      "tag": "",
      "shape": "rectangular mesh panels",
      "material": "chain link wire",
      "count": 3,
      "note": "Shown along the bridge deck; called typical."
    },
    {
      "name": "front face of wall",
      "tag": "WALL NO. 1",
      "shape": "vertical wall",
      "material": "",
      "count": 1,
      "note": "At the left end of the bridge."
    },
    {
      "name": "front face of wall",
      "tag": "WALL NO. 2",
      "shape": "vertical wall",
      "material": "",
      "count": 1,
      "note": "At the right end of the bridge."
    },
    {
      "name": "bent",
      "tag": "B.F.P.R. BENT 1",
      "shape": "end support line",
      "material": "",
      "count": 1,
      "note": "Left bridge end support."
    },
    {
      "name": "bent",
      "tag": "BENT 2",
      "shape": "single-column pier with rectangular pile cap",
      "material": "",
      "count": 1,
      "note": ""
    },
    {
      "name": "bent",
      "tag": "BENT 3",
      "shape": "single-column pier with rectangular pile cap",
      "material": "",
      "count": 1,
      "note": ""
    },
    {
      "name": "bent",
      "tag": "B.F.P.R. BENT 4",
      "shape": "end support line",
      "material": "",
      "count": 1,
      "note": "Right bridge end support."
    },
    {
      "name": "pile cap",
      "tag": "",
      "shape": "rectangular",
      "material": "",
      "count": 2,
      "note": "One shown below each of Bents 2 and 3."
    },
    {
      "name": "pile",
      "tag": "",
      "shape": "vertical",
      "material": "",
      "count": 8,
      "note": "Four piles are shown below each visible pile cap."
    },
    {
      "name": "fixed bearing",
      "tag": "FIX",
      "shape": "",
      "material": "",
      "count": 2,
      "note": "Two FIX labels are shown at Bent 2."
    },
    {
      "name": "expansion bearing",
      "tag": "EXP.",
      "shape": "",
      "material": "",
      "count": 4,
      "note": "EXP. labels are shown at the end supports and at Bent 3."
    },
    {
      "name": "future groundline",
      "tag": "",
      "shape": "irregular sloping line",
      "material": "",
      "count": 1,
      "note": ""
    },
    {
      "name": "approximate existing groundline",
      "tag": "",
      "shape": "horizontal line",
      "material": "",
      "count": 1,
      "note": ""
    }
  ],
  "measurements": [
    {
      "label": "TOTAL LENGTH OF BRIDGE",
      "value": "192'-0\"",
      "unit": "",
      "appliesTo": "bridge"
    },
    {
      "label": "span length",
      "value": "55'-0\"",
      "unit": "",
      "appliesTo": "B.F.P.R. BENT 1 to BENT 2"
    },
    {
      "label": "span length",
      "value": "82'-0\"",
      "unit": "",
      "appliesTo": "BENT 2 to BENT 3"
    },
    {
      "label": "span length",
      "value": "55'-0\"",
      "unit": "",
      "appliesTo": "BENT 3 to B.F.P.R. BENT 4"
    },
    {
      "label": "elevation",
      "value": "151.00",
      "unit": "",
      "appliesTo": "approximate existing groundline"
    }
  ],
  "notes": [
    "CHAIN LINK WIRE FENCE, TYP.",
    "FRONT FACE OF WALL NO. 1",
    "FRONT FACE OF WALL NO. 2",
    "EL. 151.00, TYP.",
    "APPROXIMATE EXISTING GROUNDLINE"
  ],
  "labels": [
    "PGL",
    "FUTURE ACCESS ROAD",
    "EXISTING TRACK",
    "FUTURE TRACK",
    "FUTURE GROUNDLINE",
    "ELEVATION"
  ],
  "description": "This crop is an elevation of a three-span bridge with 55'-0\", 82'-0\", and 55'-0\" spans, for a total bridge length of 192'-0\". It shows end walls at B.F.P.R. Bents 1 and 4, intermediate pile-supported Bents 2 and 3, deck fencing, bearing designations, and existing/future groundline and track/access-road references."
}

p01_r08 elevation of bridge spans bents and fencingElevation

  • approximate existing groundline×1horizontal line

192'-0" TOTAL LENGTH OF BRIDGE55'-0" span length82'-0" span length55'-0" span length151.00 elevation