SAN DIEGO (KGTV) - President Donald Trump's promise for a wall along the U.S.-Mexico border was spelled out further late Friday, in a pair of design requests from U.S. Customs and Border Protection (CBP).
CBP, the Department of Homeland Security agency that will oversee the project, released two requests for proposals late Friday to award contracts and initial task orders for the design and construction of border wall prototypes.
The proposals are due to the government by March 29.
"Through the construction of prototypes, CBP will partner with industry to identify the best means and methods to construct border wall before making a more substantial investment in construction," CBP said in the notification.
One request calls for designs of a solid concrete wall, while the other requests plans that incorporate a "see-through component" to the wall for "situational awareness."
Contracts will be awarded based on 30-foot-wide prototypes to be constructed in San Diego at a location yet to be determined by the government, according to the documents.
Both require the wall to be at least 18-feet high (but preferably 30-feet high.) Designs should be "physically imposing" in height and make it impossible for a human to climb or access the top.
The requests also call for anti-climb features against grappling hooks or handholds, and the prevention of breaking through the wall for at least 1 hour using a, "sledgehammer, car jack, pick axe, chisel, battery operated impact tools, battery operated cutting tools, Oxy/acetylene torch or other similar hand-held tools.
Wall designs are also required to include a 25- to 50-foot automated gate to allow pedestrians and vehicles to pass through.
In line with President Trump's promises to build a "big, beautiful wall," the design requests call for the north side of the wall to be, "aesthetically pleasing in color, anti-climb texture," and consistent with the surrounding environment.
"Any and all prototypes will be designed to deter illegal entry into the United States. Through the prototyping process, CBP may identify new designs or influences for new designs that will expand the current border barrier toolkit that CBP will use to construct a border wall system," CBP said.
While it's still not clear how much the proposed border wall would cost the U.S., the requests require plans to be "cost effective to construct, maintain and repair."
It was not clear if any companies already submitted proposals to CBP.
Last month, CBP announced the beginning of the bid accepting process for border wall designs. At that time, the agency said they expect to announce a decision by mid-April.