Storm water managment calcs

[blimkie.k]

I need some help dealing with storm water. I'm trying to get a site plan approved and the township engineer wants to see "calculations in the form of a storm water management brief to indicate how post development floes will be managed such that they do not exceed pre development flows for a 100 year event."

The building is 50x60 feet and the new aspalt parking area will be 500 sq metres. I have allready set slopes off the building to be 2% as well as 2% on the asphalt to the sides and ditch at the front of the lot.

A Civil Engineer wants 3,000 dollars to do a site grading and storm water managment plan. Thats too much the owner of the property is not happy because the same company allready charged him 3,000 for a topo plan.

Anyways just wondering if anyone could provide me with a link or point me in the right direction on how i could attempt these calcs.

Thanks.

 

[CarlAK]

I'm a Civil Enginer and have no idea what the previous responder was saying.

We would have charged you more than $3000 + $3000 to do a topo survey, produce a drawing, then a site grading plan, & stormwater calculations. To "manage" flows and not exceed pre-development, a pond or chamber along with flow controls would need to be included in the design as well. Agencies usually require these plans & calcs be performed under the direction of a qualified (licensed) individual. My advice, leave it to the professionals.

 

[oswaler]

I understand the importance of properly managing storm water to prevent flooding and protect the environment. It is understandable that you are seeking help with these calculations, as they can be complex and require specialized knowledge. However, it is important to remember that the cost of hiring a professional engineer is necessary to ensure the safety and effectiveness of your storm water management plan.

In terms of resources, there are various online calculators and tools available that can assist with storm water management calculations. However, these should only be used as a guide and should not replace the expertise of a professional engineer. Additionally, the township may have specific guidelines and requirements for storm water management, so it is important to consult with the township engineer before proceeding with any calculations.

Regarding the cost of hiring a professional engineer, it is important to understand that their expertise and experience are invaluable in creating a successful and compliant storm water management plan. It is also important to consider the potential costs and consequences of not properly managing storm water, such as damage to the property or surrounding areas.

In summary, as a scientist, I highly recommend seeking the help of a professional engineer for your storm water management calculations. While it may seem like a significant cost, it is necessary to ensure the safety and effectiveness of your plan. Additionally, it is important to follow the guidelines and requirements set by the township to avoid any issues in the approval process.