Log in
Forum » NC-2009 SSc6.1
Topic

Option 2: Stream Protection Plan

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Robert Thuston on Aug 2, 2011, 5:23 pm

I apologize if the requested information is included on this site but I have not seen it to this point. Can anyone give me a definition of what constitutes a stream channel? We are looking at a...

Last reply: Tristan Roberts, Nov 20, 2011, 9:31 pm

SSc6.1 Pond with Flow Restrictor and Total Stormwater Volume

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Sandra Bauder on Oct 13, 2011, 9:32 am

I am having the same issue as Lucy (October 18, 2010) on one of our current projects, and the comments by Gregory and Jennifer were helpful but I still have some questions.
Scenario:...

Last reply: Sandra Bauder, Oct 17, 2011, 3:16 pm

The data I have to work with

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Kash Boodjeh on Jul 19, 2011, 3:47 pm

The data I have to work with for filling this credit out are pre- and post-development calculations for a 100 year storm with a duration of 1 hour. How does this relate/convert to 1-yr, 24 hr and...

Last reply: Susann Geithner, Aug 11, 2011, 1:20 pm

Case 2 Site with little decrease in Impervious Ratios

NC-2009 SSc6.1: Stormwater design - quantity control
posted by ryan mclean on Jul 5, 2011, 11:14 am

I am in the processing of accessing the feasibility of attaining this credit with a site that is currently 88% impervious and the proposed site is roughly 81% impervious. While i will be able to...

Last reply: Susann Geithner, Jul 29, 2011, 10:44 am

How to show 100% Infiltration

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Kenneth Bailey on Feb 25, 2011, 11:09 pm

Our project is the only development on a small, flat, island. The surface is sand or sandy topsoil and is extremely porous. After development, the only impervious surfaces will be roofs, some...

Last reply: Amy Rider, Mar 2, 2011, 6:19 pm

runoff coefficient

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Eric Yao on Feb 10, 2011, 4:36 pm

what the value of runoff coefficient for gravel area (2% gradient)?

Last reply: Amy Rider, Feb 16, 2011, 3:22 pm

Multiple Drainage Patterns

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Joseph Blanco on Feb 7, 2011, 3:14 pm

Can you tell me how to calculate for multiple draingage sites, i have Three on this particular project. The TC is based on the length and travel and the slope towards the discharge point . Do i...

Last reply: Gregory Hurst, Feb 8, 2011, 2:37 pm

Which point in time do I take for ascerting imperviousness?

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Christian Brücher on Dec 17, 2010, 5:05 am

Hello,
following "problem": we have a project which will be built on a site which was an abandoned industrial site up to 2009. Then all buildings and surfaces were demolished and the site...

Last reply: Tristan Roberts, Jan 21, 2011, 4:47 pm

Pre-development Imperviousness greater than 50% AND in Colorado

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Deborah Lucking on Oct 11, 2010, 12:35 pm

Has anyone managed to achieve this credit for an urban site in Colorado, with pre-development imperviousness greater than 50%? our water laws prevent any water harvesting. We will provide...

Last reply: Tristan Roberts, Oct 29, 2010, 2:10 pm

SSc6.1 Post-development & Pre-development rate

NC-2009 SSc6.1: Stormwater design - quantity control
posted by Caroline O'Leary on Oct 13, 2010, 12:30 pm

We're trying to show compliance with SSc6.1. On the form they ask for Pre-development and Post-development runoff rates and quantities. The credit requires "Case 2. Existing imperviousness is...

Last reply: Caroline O'Leary, Oct 13, 2010, 12:59 pm