SQL query not recognizing GROUP BY column name; created by case statement

Hi,

I'm using SQL Server 2012. The result of my query below creates two rows for each site.  I would like to rollup the rows to show results on one row. See examples below However my GROUP BY statement using the column name "Site" is not being recognized. I'm receiving an error; MSG 207, Invalid column name 'Site'

Example

Current result:

                          Active          Construction

Denver                  2                      0

Denver                  0                      2

Would like to see:

Denver                  2                      2

I tried using GROUP BY but SQL is not recognizing my column heading called Site (created by case statement).  I need another person to look at this and show me where I'm going wrong.

Thank you in advance for your help!

Here is my code

SELECT

PersonDataID,

FirstName,

LastName,

PersonEmail,

SignMarkedBy,

DocumentType,

SignedDate,

DocumentSignMedium,

CASE

When SignMarkedBy ='denver123' then'Denver'

When SignMarkedBy ='utah456' then'Utah'

When SignMarkedBy ='sandeigo678'then'SanDiego'  

When Locationid ='-1'then'No Site Associated'

ElseLEFT(Location.LocationName,CHARINDEX('-',Location.LocationName+'-')-1)

Endas Site,

dbo.Company.CompanyName

FROM dbo.Status INNERJOIN PersonData on PersonData.PersonId= Status.PersonDataID

INNERJOIN dbo.Companyon Person.CompanyId= Company.CompanyId

RIGHTOUTERJOIN Location on Status.LocationID= Location.LocationId

Wherecast(SignedDateasdate)BETWEEN'01/01/2016'and'01/23/2017'

GROUPBY Site

OrderBY Site