Changes

==Overview==

==Overview==

Accurately estimating the life cycle costs for low impact development (LID) practices can be a complicated process. The LID Life Cycle Costing Tool (LCCT) helps make this process easier and allows users to produce realistic cost estimates based on user-specified LID design and operation and maintenance assumptions. The LCCT provides cost estimates for the [[construction]], [[Inspection and maintenance|inspection, and maintenance]] of LID stormwater practices over 25- and 50-year timeframes.

Accurately estimating the life cycle costs for low impact development (LID) practices can be a complicated process. The LID Life Cycle Costing Tool (LCCT) helps make this process easier and allows users to produce realistic cost estimates based on user-specified LID design and operation and maintenance assumptions. The LCCT provides cost estimates for the [[construction]], [[Inspection and maintenance|inspection, and maintenance]] of LID stormwater practices over 25 and 50 year timeframes.

Originally released in 2013, the most recent version of the Excel-based tool (Version 3.0) includes the following new features and updates:

Originally released in 2013, the most recent version of the Excel-based tool (Version 3.0) includes the following new features and updates:

*Increased transparency and usability. Users can now access the tool’s back-end to modify assumptions, unit costs, design defaults, etc.  

*Increased transparency and usability. Users can now access the tool’s back-end to modify assumptions, unit costs, design defaults, etc.  

*[[permeable pavement|Porous asphalt]] was added as a LID practice. Additionally, this tab allows for cost estimations for conventional asphalt so that direct comparisons can be made with LID practices.

*[[permeable pavement|Porous asphalt]] was added as an LID practice. Additionally, this tab allows for including conventional asphalt in the contributing drainage area up to a 1:1 impermeable to permeable area ratio.

*Cost estimation for [[dry ponds]] has been added to LID practices. [[SWM ponds|Wet ponds]] are also included as a traditional stormwater management strategy in order to facilitate direct comparisons with LID.

*Cost estimation for [[dry ponds]] has been added to LID practices. [[SWM ponds|Wet ponds]] are also included as a traditional stormwater management strategy in order to facilitate direct comparisons with LID.

*Updated line costs to 2018 based on RS Means data and information obtained through consultation with suppliers and project managers.

*Updated line costs to 2018 based on RS Means data and information obtained through consultation with suppliers and project managers.