Approved Plans and Documents - OPW22/0303

FORM A — EARTHWORKS AND FUNCTIONAL (HYDRAULIC) STRUCTURES

Purpose: To ensure earthworks bulking out, trimming and profiling and the key levels of functional (hydraulic) structures are in

accordance with design drawings and specifications. The earthworks and structures dictate the movement of stormwater

through the bioretention system and are a critical element in the function of the system.

ITEMS CHECKED

As constructed survey completed and
attached to this form

errno nent nt niet

Photos taken and attached to this form |

= = =e Se Eee

Set-out of system is correct |

Base levels are at correct elevation
(£50 mm)

Base at correct grading (0.5%)

SATISFACTORY

ACTION (IF
UNSATISFACTORY)

INITIAL

 

Punch out holes in overflow pit are
correct size, correct level and above

invert level of outlet pipe (+25 mm)

Overflow pit is correct size and crest and
invert is at correct level (25 mm)

 

Outlet pipe invert levels are correct
(upstream and downstream) (£25 mm)

 

Outlet pipe is free draining

Overflow weir (if required) is correct

 

length and at correct level +25 mm)

|

Overflow weir (if required) is keyed

 

 

into bund

Bunds/embankments surrounding the
system are at correct levels or above |

 

 

HOLD POINT: Superintendent and bioretention designer inspection and sign-off before proceeding.

Comments (attach and refer to additional pages if necessary)

NB: As constructed survey and drawings and photos attached.

Signed by superintendent:
Print name:

Date:

Document Set ID: 22315062
Version: 1, Version Date: 20/02/2023

Signed by bioretention designer:

Print name:

Date: