Exhibit 3.37(a)

State of Delaware Secretaty of State Division of Corporetions

De1ivred 01:53 PM 09/30/2008

FIMD 01:28 PM 09/30/2008

SRV 080999236 - 4606839 iz STATE of DELA WARE

LIMITED LIABILITY COMPANY

CERTIFICATE of FORMATION

First: The name of the limited liability company is — Local Concrte Supply & EguipmcnL, LLC

Second The address of its registered oftice in the State of Delaware is___________ 615 South Dupont Hwyin the City of Dover, Delaware

Zip code 19901The name of its Registered agent at such address is Capitol Service5, mu.

Third: (Use this paragraph only if the company Is to have a specific efrective date of dissolution: “The latest date on which the limited liability company is to dissolve is

Fourth: (Insert any other matters the members deterrnineto Include herein.) In Witness Whereof, the undes1gned have executed this Certific fF rninEion this

30thday of September, 2D08 utho ized Person (s)

Name: Curt M. Lindernan