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Hubstake
Drainage HS-DRN-UDRN-PERF-8

Underdrain, 8 in

Unit LF · Lettings Jan 20, 2005 – Jan 14, 2025 · 3 agencies · 3 agency descriptions pooled

Pooled median

$13.18/ LF

p25–p75
$8.52 – $20.00
Prices in the median
258
Source documents
155
States
3
p25 $8.52p75 $20.00

15 of 273 prices fell outside the Tukey fences (p25 − 1.5×IQR to p75 + 1.5×IQR) and are excluded from the figures above. They remain on the item pages below.

The 3 descriptions behind this price

Each agency prints this item in its own words. Every one keeps its own page and its own median; this page is the pooled view.

As the agency printed itWinning bidsMedianp25–p75
8" Perforated Pipe Underdrain Round269$13.65$8.62 – $20.00
8" Perforated Pipe Underdrain thin2$23.64$21.84 – $25.45
Perforated Pipe Underdrains, 8" thin2$17.32$15.66 – $18.99

By agency

Oklahoma DOT269
SCDOT2
DelDOT2

By state

Oklahoma269
South Carolina2
Delaware2

How this bucket was built

Hubstake parses each printed description into structured attributes — material, class, size, work type — and mints the identifier HS-DRN-UDRN-PERF-8 from them. Only descriptions the parser accounted for in full are pooled; anything it could not read in full keeps its own page and stays out of this median, because the part it could not read is usually the part that moves the price. Award, bid and final-payment prices are never blended — this bucket is award prices.

How the index is built