[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR635.417]

[Page 193-194]
 
                           TITLE 23--HIGHWAYS
 
 CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 635--CONSTRUCTION AND MAINTENANCE--Table of Contents
 
                Subpart D--General Material Requirements
 
Sec. 635.417  Convict produced materials.

    (a) Materials produced after July 1, 1991, by convict labor may only 
be incorporated in a Federal-aid highway construction project if such 
materials have been:
    (1) Produced by convicts who are on parole, supervised release, or 
probation from a prison or
    (2) Produced in a qualified prison facility and the cumulative 
annual production amount of such materials for use in Federal-aid 
highway construction does not exceed the amount of such materials 
produced in such facility for use in Federal-aid highway construction 
during the 12-month period ending July 1, 1987.
    (b) Qualified prison facility means any prison facility in which 
convicts, during the 12-month period ending July 1, 1987, produced 
materials for use in Federal-aid highway construction projects.

[53 FR 1923, Jan. 25, 1988, as amended at 58 FR 38975, July 21, 1993]

Appendix A to Subpart D of Part 635--Summary of Acceptable Criteria for 
                    Specifying Types of Culvert Pipes

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                                                   Alternatives required                 AASHTO designations
   Type of drainage installation   ----------------------------------------------------  to be included with       Application             Remarks
                                         Yes             No              Number             alternatives
--------------------------------------------------------------------------------------------------------------------------------------------------------
Cross drains under high-type        .............  X............  ....................  ....................  Statewide...........  Any AASHTO-approved
 pavement.\1\                                                                                                                        material.\2\
Other cross-drain installations...  X............  .............  3 minimum...........  M-170 and M-190.....  ......do............      Do.\2\
Side-drain installations..........  X............  .............  ......do............  M-36................  ......do............      Do.\2\
Special installation conditions...  .............  X............  ....................  ....................  Individual            Specified to meet
                                                                                                               installation.         special condi-
                                                                                                                                     tions.
Special drainage systems (storm     .............  X............  ....................  ....................  ......do............  Specified to meet
 sewers, inverted siphons, etc.).                                                                                                    site require-ments.
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\1\ High-type pavement is generally described as FHWA construction type codes I, J, K, L, and plant mix and penetration macadam segments, respectively
  shown in the right-hand columns of type codes G and H having a combined thickness of surface and base of 7 in or more (or equivalent) or that are
  constructed on rigid bases.

[[Page 194]]


\2\ Types not included in currently approved AASHTO specifications may be specified if recommended by the State with adequate justification and approved
  by FHWA.