Individuals and companies wishing to provide scientific services to TxDOT should request copies of requests for proposals (RFPs) by submitting a letter of interest (LOI).

There are no RFPs at this time.

Upcoming Contracts

The following is a list of TxDOT's upcoming contracts seeking the services of archeologists, biologists, geologists, historians, or other technical experts to conduct environmental or cultural assessments for transportation projects. This information is updated quarterly.

Description	Date Posted
Karst Services in Texas: TxDOT's Environmental Affairs Division anticipates issuing an RFP soliciting proposals for procuring one statewide indefinite deliverable scientific services contract for performing karst services. The contract will be issued pursuant to the Texas Transportation Code, Chapter 223, Subchapter D, and 43 TAC §9.80-9.88. Services to be provided include: conducting surveys or habitat assessments for protected karst invertebrate species, conducting biological analysis to support Section 7 consultation and preparation of ESA biological assessments or Section 10.a permits, initiating coordination with state and federal resource agencies and other services related to the foregoing scientific services. The RFP and notice of request for letters of interest will be posted on our Web site. Potential providers may receive a copy of the RFP by downloading it from this web site after the RFP is posted. RFPs will not be mailed prior to being posted online.	12/30/08
Services for Providing Water Resources Services: TxDOT’s Environmental Affairs Division anticipates issuing a RFP soliciting proposals for up to three indefinite deliverable, scientific services contracts for services that include producing water resource documentation and permitting required for transportation activities under federal and state statutes as set forth in Sections 401 and 404 of the Clean Water Act (33 U.S.C. 1341 & 1344), Section 9 and 10 of the Rivers and Harbors Act (33 U.S.C. 403), and other statutes and regulations related to compliance with federal and state environmental standards. After the RFP is posted, potential providers may receive a copy of the RFP by submitting a letter of interest (LOI) to ENV or by downloading it from this web site. RFPs will not be mailed prior to posting to this Web site.	10/21/09