Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the Milepost of the Twin Tunnel #1 North?

### Inputs:
table_name: table, columns: ['Milepost', 'Name of the tunnel', 'Length', 'Maximum Height', 'Minimum Height']

### Response:
SELECT COUNT Milepost FROM table WHERE Name of the tunnel = twin tunnel #1 north