Price checkUnderpinningPer CY
Underpinning, pit-and-pour (hand-dug sequential pits, concrete)
What bidders priced on like-for-like public pay items, from public agency bid tabulations restated to 2026 dollars and a typical job, against ESC’s published rate as a general contractor carries it.
- 1 published rate
- Price book rev 1 · valid through Dec 13, 2026
- How the comparison works
Published rate
−41%
ESC’s rate as a GC carries it, against the median public bid
ESC’s rate as a GC carries it is $5,005/CY — −41% vs the median public bid, and below 65% of 20 public bids on 4 lettings (2015–2023).
- Limited evidence: 4 lettings
- Bids all years
- New England agencies
- Restated to 2026 dollars
- Middle half of bids
- Median bid
- Typical low bid
- ESC rate, as a GC carries it (gold rule: our low–high range)
- ESC published rate
- $4,550/CY
- Range $3,550–6,450
- As a GC carries it
- $5,005/CY
- Published rate +10% · $3,905–7,095
- Median public bid
- $8,432/CY
- Recent lettings count more; each letting once
- Middle half of bids
- $4,041–9,954/CY
- 25th to 75th percentile
- Typical low bid
- $6,086/CY
- Median of each pay line’s lowest bid
- Pay lines where ESC is under even the lowest bid
- 1 of 4
- ESC’s carried rate below every bid on the line
Price book note: Per CY of underpinning concrete placed, incl. hand excavation, pit shoring and dry-pack.
This rate in the price book01 · The field
Every public bid
Each dot is one bidder’s price on one public pay line for this work: 20 bids on 4 lettings, 2015–2023. Every price is restated to 2026 dollars and a typical job size, so it compares like for like with ESC’s published rate. Point at or focus a dot for its year, agency and rank; the other bids on its pay line are ringed.
- Public bid
- Older lettings fainter
- Middle half of bids
- Median bid
- Typical low bid
- ESC as a GC carries it (gold rule: low–high)
n = 20 bids · 4 lettings · 4 pay linesSource: public agency bid tabulations
Show all 20 bidsHide the numbers
02 · Time
Over time
- Public bid
- Year’s weighted median
- ESC as a GC carries it
Each dot is one bid, placed by the year its letting opened. Every price is restated to 2026 dollars and a typical job, so a price bid years ago and one bid last season compare like for like. Ink ticks: each year’s weighted median, where the year has at least 3 bids.
n = 20 bids · 3 years with bidsSource: public agency bid tabulations
Show the numbersHide the numbers
03 · Pay lines
Pay line by pay line
Every public pay line behind this rate. No bidder, project, contract or town is shown: a line is a year, an agency, a printed quantity, a count of bidders and prices.
ESC’s carried rate would have been the lowest price on 1 of 4 pay lines.
| Year | Agency | Quantity | Bidders | Low | Median | High | Bids on the line against ESC | ESC would have ranked |
|---|---|---|---|---|---|---|---|---|
| 2023 | CTDOT | 165 CY | 3 | $8,365 | $9,574 | $10,942 | #1of 4: the lowest price on the line | |
| 2018 | NHDOT | 4 CY | 5 | $3,609 | $4,330 | $5,774 | #5of 6 | |
| 2015 | NHDOT | 18 CY | 7 | $1,373 | $2,589 | $3,923 | #8of 8 | |
| 2015 | NHDOT | 6 CY | 5 | $805 | $2,739 | $4,027 | #6of 6 |
Newest first · 4 of 4 pay lines
Low, median and high are restated to 2026 dollars and a typical job; the quantity is as printed. The strip shows each bid on the line (dots), its median (ink tick) and ESC’s rate as a GC carries it (diamond), on one scale for every line. “ESC would have ranked” counts ESC as one more bidder on the line.
04 · Agencies
By agency
The same comparison inside each agency’s own lettings.
| Agency | Lettings | Bids | Median bid /CY | Field and ESC | ESC vs median | Bids above ESC |
|---|---|---|---|---|---|---|
| All agencies | 4 | 20 | $8,432 | −41% | 65% | |
| New Hampshire Department of TransportationNHDOT | 3 | 17 | $3,774 | +33% | 10% | |
| Connecticut Department of TransportationCTDOT | 1 | 3 | Too few lettings to compare | |||
- Middle half of bids
- Median bid
- ESC rate, as a GC carries it (gold rule: our low–high range)
An agency is compared on its own from 3 lettings. Every agency’s bids count in the charts and pay lines above.
Where these numbers come from
Basis
Underpinning, pit-and-pour (hand-dug sequential pits, concrete). 20 public bids on 4 lettings and 4 pay lines, from NHDOT and CTDOT (2015–2023; every year is used, because bids from 2019 on leave fewer than 8 lettings). Every bid is restated to 2026 dollars and to a typical ESC job of 5.5 CY. A letting’s weight halves every 3 years, and each letting counts once, however many bidders it drew.
ESC’s rate is compared as a general contractor carries it: the published typical rate plus 10%, because a public pay line is the general contractor’s price, markup included.
Limited evidence: 4 lettings. A comparison is published from 3 lettings; 8 or more count as strong evidence.
Published by Earth Support Corp. from public agency bid tabulations. These are budget comparisons, not a quote or an offer: ESC quotes its earth-support scope to general contractors as a subcontractor, from your drawings.
Send drawings. Get a firm, line-item quote within 3 business days.
Rev 1 · valid through Dec 13, 2026
Or email plans and your bid date to bids@earthsupportcorp.com.