49100426F0029↗

Name: 49100426F0029: Sac Peak Mercury Stability Effort
Creator: SpendQuery
License: https://www.usa.gov/government-works

Thornton Tomasetti, Inc. received this contract from Div of Acq and Cooperative Support, National Science Foundation: $670.7K obligated so far for environmental systems protection- environmental remediation. Its period of performance ended 2026-08-31.

Key facts · data as of Oct 22, 2026

Recipient: Thornton Tomasetti, Inc.
Awarding agency: National Science Foundation
Contracting office: Div of Acq and Cooperative Support (491004)
Obligated to date: $670.7K
Potential value: $670.7K
Ends: 2026-08-31

Source: USAspending.gov prime award records (obligations: money committed, not outlays), data as of Oct 22, 2026.

Cite this page: SpendQuery, Award 49100426F0029, data as of Oct 22, 2026, https://spendquery.com/award?id=CONT_AWD_49100426F0029_4900_49100426D0001_4900

Thornton Tomasetti, Inc.: all federal awards · National Science Foundation: spending · Div of Acq and Cooperative Support: what it buys · The follow-on: recompete brief

SAC PEAK MERCURY STABILITY EFFORT

Delivery Order · National Science Foundation · to Thornton Tomasetti, Inc. (UEI LGWMGNMDN987) · data as of 2026-10-22

Obligated to date$670.7K6 actions

Current value$670.7Kwith options exercised

Period2026-03-23 → 2026-08-31current end date

Up for re-bid: ends 2026-08-31. Recompete brief →

What it is

Product or service: Environmental Systems Protection- Environmental Remediation (PSC F108)
Industry: Engineering Services (NAICS 541330)
Contracting office: Div of Acq and Cooperative Support (491004)
Competition: Not competed
Pricing: Time and materials
How it was bought: Single-award IDIQ · under 49100426D0001
Where the work is: Otero, NM · district NM-02

Obligations by fiscal year

FY2026$670.7K

SpendQuery holds FY2023 on; earlier years are on USAspending.gov.

Subcontractors: where the money went next

No subawards reported for this award. Primes report subawards of $30,000 or more; many awards have none.

Every action

6 actions since 2026-03-23. Each is a modification or amendment with the money it added or took back.

Date	Modification	Kind	Amount	What the agency wrote
2026-07-31	P00005	Administrative change	$0	EXTEND THE POP TO 31 AUGUST 2026 AT NO COST TO THE GOVERNMENT
2026-07-06	P00004	Administrative change	$0	EXTEND THE POP TO 31 JULY 2026 AT NO COST TO THE GOVERNMENT
2026-06-08	P00003	Supplemental agreement (work within scope)	$350.0K	AUTHORIZATION TO PROCURE LONG LEAD MATERIAL AND SERVICES
2026-05-05	P00002	Supplemental agreement (work within scope)	$0	SAC PEAK MERCURY STABILITY EFFORT
2026-04-15	P00001	Supplemental agreement (work within scope)	$0	SAC PEAK MERCURY STABILITY EFFORT
2026-03-23	0		$320.7K	SAC PEAK MERCURY STABILITY EFFORT

Source: USAspending.gov prime award transactions and FSRS subaward reports, as loaded by SpendQuery (data as of 2026-10-22). Amounts are obligations (money committed), not outlays. The official record on USAspending.gov ↗

Putting the award page together from the records…