Scenario Notes
Meeting 5
St. Albans Modeling Working Group
1. Stormwater Separation - Jerry
a) Separation only
b) With Treatment of all
c) Treatment of none?
2. Replacing Salt/Sand mixture with Magic Salt- Renae
a) Decrease in plowing due to better results
3. Bioinfiltration/ Bioretention – Karen
a) For new developments instead of detention
b) Change in % water (IC or capture)
c) LID (Low Impact Dev) suburbia
d) Flow and Erosion too?
e) Check out NC for information
f) Water reduction through a green roof??
4. Restore city’s flood plain -Bonnie
a) How much to reduce 5-10% (2-5%) of P, and flow?
b) 30/40/50 feet all along stream
c) So that we are not losing more
d) Do we need large scale detention? Buy out homes? Deposition to
floodplain
e) Check out DuBois and King Survey
5. Deposition on farms and city
6. Displacement of Land with detention ponds and buffers – Dick?
a) Town (new development)
b) Account for in mass balance?
7. Decrease in fertilizer use due to higher costs – Kathy/Dick
a) 50% decrease N Fertilizer, 75% decrease in P fertilizer
b) $60 per hour = 1 load with 2 loads per hour
c) = 6,000 gallons
d) 2 treatments per year - 1 load =1 acre/hay (divided by 3 treatments)
e) 2 treatments per year - 2 loads = 1 acre/corn silage and grain
8. Soil loss = T (depends on soil type) – Kathy
a) Change in erosion Ag landscape
9. Buffers – Ben, Kathy
a) 2 Steet(?) (all streams: all ditches: both together)
b) Ag Land 10 feet/30 feet
c) Small Ditches Tile (6”)
d) Vegetate all road ditches
e) Riparian vs. Grass buffers
f) In model use “grass filter strip” instead of “forest”
10. Farmsteads – Dick/Kathy
a) Decrease by 80% TP,TN,TSS
11. Sediment Traps -Bonnie
a) To reduce city P and sediment (most important) by 20%
b) Grant written with army corp. but no action
c) Use city limit
d) Vortex technology
e) Will be forced in 10 years
12. Diversion Structure
a) Flow, TP, TSS
13. Fertilizer Decrease- Jim
a) No P fertilizer at all (Ordinance?)
14. Stream stability- from straight to natural – Staci, Jim, Ben
15. Landuse change floodplains dev to forest- Bonnie (will send map)
16. New Stormwater Standards (2002) –
a) get credit for a buffer (Karen)
b) retrofitted straight pipes (Bonnie?)
17. Treat tile drain, decrease P in feed
18. Convert all Farmland to Forest/Urban - Dick