09-02-23 Operational Management and Maintenance Plan_Issue B

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

Photos taken and attached to this form |

Set-out of system is correct

Base levels are at correct elevation

(£50 mm)

Base at correct grading (0.5%)

fe

SATISFACTORY

es

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 dra

 

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:

Signed by bioretention designer:

Print name:

Date: