According to the BJCP Style Guidelines.
14B. American IPA
Vital Statistics: OG: 1.056 – 1.075
IBUs: 40 – 70 FG: 1.010 – 1.018
SRM: 6 – 15 ABV: 5.5 – 7.5%
Overall Impression: A decidedly hoppy and bitter, moderately strong American pale ale.
History: An American version of the historical English style, brewed using American ingredients and attitude.
Ingredients: Pale ale malt (well-modified and suitable for single-temperature infusion mashing); American hops; American yeast that can give a clean or slightly fruity profile. Generally all-malt, but mashed at lower temperatures for high attenuation. Water character varies from soft to moderately sulfate. Versions with a noticeable Rye character (“RyePA”) should be entered in the Specialty category.
Commercial Examples: Bell’s Two-Hearted Ale, AleSmith IPA, Russian River Blind Pig IPA, Stone IPA, Three Floyds Alpha King, Great Divide Titan IPA, Bear Republic Racer 5 IPA, Victory Hop Devil, Sierra Nevada Celebration Ale, Anderson Valley Hop Ottin’, Dogfish Head 60 Minute IPA, Founder’s Centennial IPA, Anchor Liberty Ale, Harpoon IPA, Avery IPA
These are guidelines for brewing an IPA. It doesn't mean that the beer absolutely has to nail the guidelines to emulate an example but it is in your best interests to stay as close as possible to the guidelines in an attempt to win a competition.
Here's what I came up with for your recipe on beersmith. It appears as if your IBU's are really high for the style but let your taste be your guide there.
Type: All Grain
Batch Size: 5.00 gal
Boil Time: 60 min
Brewhouse Efficiency: 75.00
Amount Item Type % or IBU
10.00 lb Munich Malt (6.5 SRM) Grain 83.33 %
1.00 lb Caramel/Crystal Malt - 20L (20.0 SRM) Grain 8.33 %
0.50 lb Munich Malt - 20L (20.0 SRM) Grain 4.17 %
0.25 lb Caramel/Crystal Malt - 40L (40.0 SRM) Grain 2.08 %
0.25 lb Caramunich Malt (56.0 SRM) Grain 2.08 %
1.00 oz Columbus (Tomahawk) [14.00 %] (60 min) Hops 45.2 IBU
1.00 oz Saaz [4.00 %] (Dry Hop 3 days) Hops -
1.00 oz Chinook [11.50 %] (40 min) Hops 32.6 IBU
1.00 oz Centennial [9.00 %] (30 min) Hops 22.3 IBU
1.00 oz Williamette [5.80 %] (15 min) Hops 9.3 IBU
1.00 oz Liberty [4.30 %] (5 min) Hops 2.8 IBU
Est Original Gravity: 1.065 SG
Est Final Gravity: 1.017 SG
Estimated Alcohol by Vol: 6.35 %
Bitterness: 112.1 IBU
Est Color: 13.1 SRM