Create a List Using Powershell script

Below script loops through all site collections in the web application and it creates a list.

[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")

Add-PSSnapin Microsoft.SharePoint.Powershell -ErrorAction SilentlyContinue

$WebAppUrl = "servername"

$rootsite = new-object Microsoft.SharePoint.SPSite($WebAppUrl)

$spWebApp = $rootSite.WebApplication

$oRootweb = $rootSite.OpenWeb()

$ErrorLog = ""

$i = 0

foreach($site in $spWebApp.Sites)

{

        $RootSCWeb = $site.OpenWeb()           

        $siteURL = $RootSCWeb.Url

        $ErrorLog = $ErrorLog + $siteURL + "`n`n"

        $fileUrl=$null

            $IsTrue =$false

        Write-Host $RootSCWeb.Url

  

            if (($RootSCWeb -ne $null)  -and ($siteURL -ne $WebAppUrl))

           {

                        #if($siteURL  -eq  "http://w2msmossmgn02:33980/sites/P000736")

                        #{

                      $blogUrl = $siteURL + "/TeamBlog"

                      $blogSite = New-Object Microsoft.SharePoint.SPSite($blogUrl)

                      $blogWeb = $blogSite.OpenWeb() 

                             

                              if ($blogWeb -ne $null)

                              {

                                    $PhotosList =  $blogWeb.Lists.TryGetList("Photos")

                                    if( $PhotosList -ne $null)

                                    {

                                          Write-Host  $PhotosList.Title

                                          #delete if list exist

                                          $PhotosList.Delete()

                                          $SPTemplate = $blogWeb.ListTemplates["OPS Project Pictures"]

                                          $blogWeb.Lists.Add("Photos","Share a picture with the team by adding it to this picture library",$SPTemplate)

                                    }

                              }

                        $RootSCWeb.Close()

                              break

                  #}

             }

       

        $site.Close()

        $site.Dispose()

           

}

    if($ErrorLog.Length -gt 0)

    {

        $ErrorLog =  " Exceptions `n`n" + $ErrorLog

       [Microsoft.SharePoint.Utilities.SPUtility]::SendEmail($oRootweb, $true, $true, "mailid", "SharePoint Site Update Patch - Log", $ErrorLog)   

    }