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State of Delaware DOT·Delaware

Subsurface Investigation Services

Closes 9/24/2026$500k – $3MRequest for Proposal
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Description

The Delaware Department of Transportation is seeking up to two firms to provide statewide subsurface investigation services on an Indefinite‑Delivery/Indefinite‑Quantity (IDIQ) basis. The work includes drilling, core and undisturbed sampling, a suite of geotechnical laboratory tests, and associated field testing such as piezometer and infiltration tests. Pricing will be submitted on a unit‑price basis, with a maximum ceiling of $3 million per individual agreement and a base term of three years, extendable by up to two one‑year extensions. All drilling personnel must hold a Delaware Well Driller’s License, and contractors are responsible for permits, traffic control, and compliance with federal and state regulations. • IDIQ contract; up to two awards, each ≤ $3 M, 3‑year base term (possible 5‑year total). • Scope: statewide subsurface drilling, sampling, testing, MOT set‑up, and reporting. • Mandatory licensing (Delaware Well Driller’s License) and permit acquisition. • Unit‑price pricing with separate line items for permit fees, utility scans, and GPS layout. • No DBE participation goal (temporarily suspended).

Attached files

The solicitation documents live at the source — open the bid source above to download them.

Contact

Julia Vander Schel(Consultant Control Coordinator)

[email protected]

(302) 760-2031

Key dates

Opened
8/21/2026
Closes
9/24/2026
Duration
3 years

Last updated

Details

Type
Request for Proposal
Industry
Engineering Services
NAICS
541330
Solicitation №
DOT262216-2217-SUB_INVEST

Budget estimate

$500,000 – $3,000,000

The solicitation caps each individual IDIQ agreement at $3 million and allows up to two awards, suggesting a potential total spend of up to $6 million. A typical subcontractor performing the drilling, sampling, and testing on a unit‑price basis might capture anywhere from 15‑30 % of the contract value, depending on the mix of work and overhead. Consequently, a realistic earnings range for a qualified firm could be roughly $500,000 at the low end (limited scope or early‑stage work) up to $3,000,000 at the high end (full utilization of the $3 M ceiling). Factors influencing the final amount include the number of work orders issued, the variety of test items performed, and the cost of supplemental services such as permit fees and utility scans.

AI estimate from the solicitation

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