American Brown Ale Redhook's Mudslinger clone

Ok after much research on the forums and internet and playing around with my brew software. I came up with this recipe its pretty darn close almost identical. Turned out to be a real crowd pleaser hope you guys enjoy it we did.
Mudslinger

Batch size 5.5 gallons
Boil size 7.1 gallons
Boil time 90 minutes
Grain weight 11.72 pounds
Efficiency 75%
Original gravity 1.063
Final gravity 1.019
Alcohol (by volume) 5.8%
Bitterness (IBU) 29
Color (SRM) 23.7°L
Yeast
13 dry grams
Dry
Danstar Nottingham Ale

Grains/Extracts/Sugars
11.72 pounds
2 Row Base
37ppg, 1.5°L 8.5 pounds
72.5%
Crystal 60L
34ppg, 60°L 1.75 pounds
14.9%
Munich (Light)
34ppg, 10°L 1 pound
8.5%
Chocolate
29ppg, 350°L 0.35 pounds
3.0%
Black Patent
27ppg, 500°L 0.06 pounds
0.5%
Barley (Roasted)
28ppg, 500°L 0.06 pounds
0.5%

Hops
2 ounces
Willamette hops
5%, Whole 1 ounce
Northern Brewer hops
9%, Whole 1 ounce

Mash
60 minutes, 9.1 gallons
Strike
Target 153°F 4.4 gallons
164°F
60 minutes (+0)
Sparge 4.7 gallons
167°F

Boil
90 minutes, 7.1 gallons
Northern Brewer hops
9%, Whole 1 ounce
60 minutes (+30)
Willamette hops
5%, Whole 1 ounce
15 minutes (+75)

Ferment
21 days @ 57-70°F

Hey, I know this post is a few years old but I tried brewing this one this past weekend. But I'm concerned with the yeast. I hydrated it before pitching and it started out fine but after 3 days it has gone stagnant. I'm gonna give it a week and take a sample to see where my FG is at. Hopefully my yeast was good from the LHBS.