US DEPARTMENT OF TRANSPORTATION -- FEDERAL HIGHWAY ADMINISTRATION

***Construction Inspection Checklist***

**Section 605 Underdrains, Sheet Drains, and Pavement Edge Drains**

  --------------------------------------- -------------------------------
  Project Name:                           Project No.:

  Date:                                   Weather:

  Contractor:                             Subcontractor:

  Inspector:                              Location/Station:

  Description of work being inspected:    
  --------------------------------------- -------------------------------

  ---------------------- ----------------------------------------------------------
  **Conformance**        **CHECKS (characteristics)**

  **[Yes]{.underline}    
  [No]{.underline}       
  [N.A.]{.underline}**   

                         **General**

                         1A. Was the same material and coating used on all
                         contiguous drain sections, extensions, elbows, branch
                         connections, and other special sections? (605.03)

                         1B. Was the location and length determined in the field
                         and the design submitted for approval? (605.03)

                         2\. The drain material was not installed before the CO had
                         accepted the final location and length? (605.03)

                         3\. Was excavation and backfill completed according to
                         Section 209? (605.03)

                         4\. If geotextile or geocomposite was used, were the
                         trench surfaces smoothed by removing all projections that
                         may have damaged the geotextile or geocomposite? (605.03)

                         5\. If the geotextile or geocomposite was damaged during
                         installation, was the damaged area replaced with good
                         material? (605.03)

                         6\. If repairs to geocomposites were made were they
                         according to the manufacturer's recommendations? (605.03)

                         7\. Soil or other foreign material was not permitted to
                         enter the drain system? (605.03)

                         8\. Was the upgrade end of installations plugged? (605.03)

                         9\. Was nonperforated pipe furnished for outlet pipe?
                         (605.03)

                         10\. Was outlet pipe installed according to Section 602?
                         (605.03)

                         11\. Was a screen made of 17 gage diameter galvanized wire
                         having approximately ½ by ½ mesh openings immediately
                         placed and secured over the outlet ends of all exposed
                         pipes and weep holes? (605.03)

                         **Placing Underdrain**

                         12\. Were pipe sections joined securely with coupling
                         fittings or bands? (605.04)

                         13\. Were PVC and ABS pipes joined using either a flexible
                         elastomeric seal or solvent cement? (605.04)
  ---------------------- ----------------------------------------------------------

+-----------+----------------------------------------------------------+
| **Conf    | **CHECKS (characteristics)**                             |
| ormance** |                                                          |
+-----------+----------------------------------------------------------+
| *         |                                                          |
| *[Yes]{.u |                                                          |
| nderline} |                                                          |
| [No]{.u   |                                                          |
| nderline} |                                                          |
| [N        |                                                          |
| .A.]{.und |                                                          |
| erline}** |                                                          |
+-----------+----------------------------------------------------------+
|           | 14\. Were polyethylene pipes joined with snap-on,        |
|           | screw-on, or wrap around coupling bands as recommended   |
|           | by the manufacturer? (605.04)                            |
+-----------+----------------------------------------------------------+
|           | 15\. Were all trenches within the limits of the roadbed  |
|           | backfilled and compacted according to Section 209 except |
|           | was granular backfill material used? (605.04)            |
+-----------+----------------------------------------------------------+
|           | 16\. If when underdrain was placed in ditch lines, was   |
|           | infiltration of surface water prevented by placing       |
|           | material conforming to AASHTO M 145, A-4, A-5, A-6, or   |
|           | A--7 in the top 12 inches of the trench? (605.04)        |
+-----------+----------------------------------------------------------+
|           | **Placing Underdrain (Standard Underdrain)**             |
+-----------+----------------------------------------------------------+
|           | 17\. When geotextile was required, was it placed with    |
|           | the long dimension of the geotextile parallel to the     |
|           | centerline of the trench? (605.04a)                      |
+-----------+----------------------------------------------------------+
|           | 18\. Was geotextile positioned without stretching, and   |
|           | in contact with the trench surface?                      |
|           |                                                          |
|           | (605.04a)                                                |
+-----------+----------------------------------------------------------+
|           | 19\. Were the joints overlapped a minimum of 24 inches   |
|           | with the upstream geotextile placed over the downstream  |
|           | geotextile? (605.04a)                                    |
+-----------+----------------------------------------------------------+
|           | 20\. Was the collector pipe placed with the perforations |
|           | facing downward? (605.04a)                               |
+-----------+----------------------------------------------------------+
|           | 21\. Was granular backfill placed to a height of 12      |
|           | inches above the top of the collector pipe and           |
|           | compacted? (605.04a)                                     |
+-----------+----------------------------------------------------------+
|           | 22\. Was the collector pipe not displaced while being    |
|           | backfilled? (605.04a)                                    |
+-----------+----------------------------------------------------------+
|           | 23\. Was the remainder of the granular backfill material |
|           | placed and compacted according to Section 209? (605.04a) |
+-----------+----------------------------------------------------------+
|           | 24\. Was the geotextile folded over the top of the       |
|           | granular backfill with a minimum overlap of 12 inches?   |
|           | (605.04a)                                                |
+-----------+----------------------------------------------------------+
|           | **Placing Underdrain (Geocomposite Underdrain)**         |
+-----------+----------------------------------------------------------+
|           | 25\. Was the geotextile extended from the bottom of the  |
|           | drainage core around the collector pipe? (605.04b)       |
+-----------+----------------------------------------------------------+
|           | 26\. Were splices and installed outlet fittings          |
|           | constructed according to the manufacturer's              |
|           | recommendations? (605.04b)                               |
+-----------+----------------------------------------------------------+
|           | 27\. Was infiltration of soil into the geocomposite core |
|           | prevented? (605.04b)                                     |
+-----------+----------------------------------------------------------+
|           | 28\. Was the assembled geocomposite in the trench placed |
|           | with the face of the geocomposite against the inflow     |
|           | side of the trench? (605.04b)                            |
+-----------+----------------------------------------------------------+
| **Conf    | **CHECKS (characteristics)**                             |
| ormance** |                                                          |
+-----------+----------------------------------------------------------+
| *         |                                                          |
| *[Yes]{.u |                                                          |
| nderline} |                                                          |
| [No]{.u   |                                                          |
| nderline} |                                                          |
| [N        |                                                          |
| .A.]{.und |                                                          |
| erline}** |                                                          |
+-----------+----------------------------------------------------------+
|           | 29\. If the trench wall was irregular, was the trench    |
|           | wall smoothed or was a layer of granular backfill placed |
|           | between the geocomposite and the trench wall? (605.04b)  |
+-----------+----------------------------------------------------------+
|           | 30\. Was the drain temporarily supported against the     |
|           | trench wall while backfilling?                           |
|           |                                                          |
|           | (605.04b                                                 |
+-----------+----------------------------------------------------------+
|           | 31\. When the trench was less than 18 inches wide, was   |
|           | the trench backfilled using clean sand? (605.04b)        |
+-----------+----------------------------------------------------------+
|           | 32\. Was the sand compacted by vibrating, tamping with a |
|           | mechanical tamper, or flooding with water? (605.04b)     |
+-----------+----------------------------------------------------------+
|           | 33\. When the trench was 18 inches wide or more was      |
|           | granular backfill or clean sand placed to a height of 12 |
|           | inches above the top of the collector pipe and           |
|           | compacted? (605.04b)                                     |
+-----------+----------------------------------------------------------+
|           | 34\. Was the remainder of the granular backfill material |
|           | or clean sand placed and compacted according to Section  |
|           | 209? (605.04b)                                           |
+-----------+----------------------------------------------------------+
|           | **Placing Geocomposite Sheet Drain**                     |
+-----------+----------------------------------------------------------+
|           | 35\. Was the sheet drain placed against a mortar course  |
|           | less than 4 days old? (605.05)                           |
+-----------+----------------------------------------------------------+
|           | 36\. If a geocomposite was used in conjunction with a    |
|           | waterproof membrane, were drainage panels installed that |
|           | were compatible with the membrane using methods          |
|           | recommended by the membrane manufacturer? (605.05)       |
+-----------+----------------------------------------------------------+
|           | 37\. Was the geocomposite drain assembled and placed     |
|           | against the surface to be backfilled according to the    |
|           | manufacturer's recommendation? (605.05)                  |
+-----------+----------------------------------------------------------+
|           | 38\. Were geocomposite drains spliced so the flow across |
|           | the edges was continuous?                                |
|           |                                                          |
|           | (605.05)                                                 |
+-----------+----------------------------------------------------------+
|           | 39\. Was the geotextile overlapped a minimum of 3 inches |
|           | in the direction of water flow?                          |
|           |                                                          |
|           | (605.05)                                                 |
+-----------+----------------------------------------------------------+
|           | 40\. For vertical splices, was the geotextile overlapped |
|           | in the direction backfill proceeded?                     |
|           |                                                          |
|           | (605.05)                                                 |
+-----------+----------------------------------------------------------+
|           | 41\. Was the drainage core to the collector pipe or weep |
|           | holes connected so the flow was continuous through the   |
|           | system? (605.05)                                         |
+-----------+----------------------------------------------------------+
|           | 42\. Was the geotextile extended from the bottom of the  |
|           | drainage core around the collector pipe? (605.05)        |
+-----------+----------------------------------------------------------+
|           | 43\. Was the underdrain backfilled with structural       |
|           | backfill and compacted according to Subsections 208.10   |
|           | and 208.11? (605.05)                                     |
+-----------+----------------------------------------------------------+

+-----------+-----+----------------------------------------------------+
| *         |     |                                                    |
| *[Yes]{.u |     |                                                    |
| nderline} |     |                                                    |
| [No]{.u   |     |                                                    |
| nderline} |     |                                                    |
| [N        |     |                                                    |
| .A.]{.und |     |                                                    |
| erline}** |     |                                                    |
+-----------+-----+----------------------------------------------------+
|           | **P |                                                    |
|           | lac |                                                    |
|           | ing |                                                    |
|           | Geo |                                                    |
|           | com |                                                    |
|           | pos |                                                    |
|           | ite |                                                    |
|           | Pa  |                                                    |
|           | vem |                                                    |
|           | ent |                                                    |
|           | E   |                                                    |
|           | dge |                                                    |
|           | D   |                                                    |
|           | rai |                                                    |
|           | n** |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 4\. |                                                    |
|           | Was |                                                    |
|           | the |                                                    |
|           | geo |                                                    |
|           | com |                                                    |
|           | pos |                                                    |
|           | ite |                                                    |
|           | pa  |                                                    |
|           | vem |                                                    |
|           | ent |                                                    |
|           | e   |                                                    |
|           | dge |                                                    |
|           | dr  |                                                    |
|           | ain |                                                    |
|           | and |                                                    |
|           | out |                                                    |
|           | let |                                                    |
|           | ma  |                                                    |
|           | ter |                                                    |
|           | ial |                                                    |
|           | ass |                                                    |
|           | emb |                                                    |
|           | led |                                                    |
|           | acc |                                                    |
|           | ord |                                                    |
|           | ing |                                                    |
|           | to  |                                                    |
|           | the |                                                    |
|           | ma  |                                                    |
|           | nuf |                                                    |
|           | act |                                                    |
|           | ure |                                                    |
|           | r's |                                                    |
|           | r   |                                                    |
|           | eco |                                                    |
|           | mme |                                                    |
|           | nda |                                                    |
|           | tio |                                                    |
|           | ns? |                                                    |
|           | (6  |                                                    |
|           | 05. |                                                    |
|           | 06) |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 5\. |                                                    |
|           | If  |                                                    |
|           | the |                                                    |
|           | tre |                                                    |
|           | nch |                                                    |
|           | w   |                                                    |
|           | all |                                                    |
|           | was |                                                    |
|           | i   |                                                    |
|           | rre |                                                    |
|           | gul |                                                    |
|           | ar, |                                                    |
|           | was |                                                    |
|           | it  |                                                    |
|           | sm  |                                                    |
|           | oot |                                                    |
|           | hed |                                                    |
|           | or  |                                                    |
|           | was |                                                    |
|           | a   |                                                    |
|           | la  |                                                    |
|           | yer |                                                    |
|           | of  |                                                    |
|           | cl  |                                                    |
|           | ean |                                                    |
|           | s   |                                                    |
|           | and |                                                    |
|           | pla |                                                    |
|           | ced |                                                    |
|           | b   |                                                    |
|           | etw |                                                    |
|           | een |                                                    |
|           | the |                                                    |
|           | geo |                                                    |
|           | com |                                                    |
|           | pos |                                                    |
|           | ite |                                                    |
|           | and |                                                    |
|           | the |                                                    |
|           | tre |                                                    |
|           | nch |                                                    |
|           | wa  |                                                    |
|           | ll? |                                                    |
|           | (6  |                                                    |
|           | 05. |                                                    |
|           | 06) |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 6\. |                                                    |
|           | Was |                                                    |
|           | the |                                                    |
|           | dr  |                                                    |
|           | ain |                                                    |
|           | sup |                                                    |
|           | por |                                                    |
|           | ted |                                                    |
|           | a   |                                                    |
|           | gai |                                                    |
|           | nst |                                                    |
|           | the |                                                    |
|           | tre |                                                    |
|           | nch |                                                    |
|           | w   |                                                    |
|           | all |                                                    |
|           | wh  |                                                    |
|           | ile |                                                    |
|           | be  |                                                    |
|           | ing |                                                    |
|           | bac |                                                    |
|           | kfi |                                                    |
|           | lli |                                                    |
|           | ng? |                                                    |
|           | (6  |                                                    |
|           | 05. |                                                    |
|           | 06) |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 7\. |                                                    |
|           | If  |                                                    |
|           | the |                                                    |
|           | tre |                                                    |
|           | nch |                                                    |
|           | was |                                                    |
|           | l   |                                                    |
|           | ess |                                                    |
|           | t   |                                                    |
|           | hen |                                                    |
|           | 18  |                                                    |
|           | inc |                                                    |
|           | hes |                                                    |
|           | wi  |                                                    |
|           | de, |                                                    |
|           | was |                                                    |
|           | it  |                                                    |
|           | b   |                                                    |
|           | ack |                                                    |
|           | fil |                                                    |
|           | led |                                                    |
|           | w   |                                                    |
|           | ith |                                                    |
|           | cl  |                                                    |
|           | ean |                                                    |
|           | sa  |                                                    |
|           | nd? |                                                    |
|           | (6  |                                                    |
|           | 05. |                                                    |
|           | 06) |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 8\. |                                                    |
|           | Was |                                                    |
|           | the |                                                    |
|           | s   |                                                    |
|           | and |                                                    |
|           | com |                                                    |
|           | pac |                                                    |
|           | ted |                                                    |
|           | w   |                                                    |
|           | ith |                                                    |
|           | a   |                                                    |
|           | vib |                                                    |
|           | rat |                                                    |
|           | ing |                                                    |
|           | tam |                                                    |
|           | per |                                                    |
|           | or  |                                                    |
|           | fl  |                                                    |
|           | ood |                                                    |
|           | ing |                                                    |
|           | w   |                                                    |
|           | ith |                                                    |
|           | wat |                                                    |
|           | er? |                                                    |
|           | (6  |                                                    |
|           | 05. |                                                    |
|           | 06) |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 4   |                                                    |
|           | 9\. |                                                    |
|           | If  |                                                    |
|           | the |                                                    |
|           | tre |                                                    |
|           | nch |                                                    |
|           | was |                                                    |
|           | wi  |                                                    |
|           | der |                                                    |
|           | t   |                                                    |
|           | han |                                                    |
|           | 18  |                                                    |
|           | i   |                                                    |
|           | nch |                                                    |
|           | es, |                                                    |
|           | was |                                                    |
|           | it  |                                                    |
|           | b   |                                                    |
|           | ack |                                                    |
|           | fil |                                                    |
|           | led |                                                    |
|           | w   |                                                    |
|           | ith |                                                    |
|           | gr  |                                                    |
|           | anu |                                                    |
|           | lar |                                                    |
|           | ba  |                                                    |
|           | ckf |                                                    |
|           | ill |                                                    |
|           | and |                                                    |
|           | com |                                                    |
|           | pac |                                                    |
|           | ted |                                                    |
|           | or  |                                                    |
|           | cl  |                                                    |
|           | ean |                                                    |
|           | s   |                                                    |
|           | and |                                                    |
|           | acc |                                                    |
|           | ord |                                                    |
|           | ing |                                                    |
|           | to  |                                                    |
|           | S   |                                                    |
|           | ect |                                                    |
|           | ion |                                                    |
|           | 2   |                                                    |
|           | 09. |                                                    |
+-----------+-----+----------------------------------------------------+
|           | 5   |                                                    |
|           | 1\. |                                                    |
+-----------+-----+----------------------------------------------------+
| Percent   |     | $\frac{\text{Yes}}{\text{Yes + No}}(\text{100})$=  |
| Co        |     | $\frac{\text{                   }}{}(\text{100})$= |
| nformance |     | $\frac{\text{               }}{}\text{\%}$         |
|           |     | Conformance                                        |
| Cal       |     |                                                    |
| culations |     |                                                    |
+-----------+-----+----------------------------------------------------+

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