updated 12:52 a.m. ET May 15, 2008

DEYANG, China - The Chinese government has issued a public plea for rescue equipment to aid in the search of survivors from this week's massive earthquake, state media reported Thursday.

A government ministry was asking citizens for equipment ranging from hammers, shovels and demolition tools to cranes and rubber boats, the official Xinhua News Agency said.

Soldiers on W4ednesday rushed to shore up a dam cracked by Monday's 7.9 earthquake, and rescuers came by helicopter and ship into the isolated epicenter but still were forced to dig for survivors with their bare hands.

Nearly 26,000 people remained buried in collapsed buildings, and the death toll of almost 15,000 was expected to climb as relief operations spread into the mountains of Sichuan province. The quake triggered landslides that blocked roads to hardest-hit areas.

Even as the rescue effort seemed to gather momentum — speeded by clearing weather after two days of rain — caring for tens of thousands of people left homeless across the disaster zone have stretched thin the government's resources.

Victims begged for aid on roadsides, and people settled in for a third night in a growing sprawl of refugee camps littered with garbage. In Hanwang, a town in one of the hardest-hit counties, survivors stood hoping for handouts from cars, jostling with each other to reach to one vehicle where a passenger passed bottled water out the window.

"I'm numb," said Zhao Xiaoli, a 25-year-old nurse working at a makeshift triage center in tire factory driveway. "The first day, hundreds of kids died when a school collapsed. The rest who came in had serious injuries. There was so little we could do for them."

Four-inch cracks in dam
Damage to the two-year-old Zipingpu Dam threatened downstream communities still digging out from the quake. Some 2,000 soldiers were sent to the dam on Wednesday, Xinhua reported.

Four-inch cracks scarred the top of the dam, and landslides had poured down the surrounding hills, the business news magazine Caijing said on its Web site in a report from the scene.

Although the government pronounced the dam safe late Tuesday after an inspection, Caijing said its waters were being emptied to relieve pressure.

The Ministry of Water Resources issued a notice to check reservoirs nationwide, while the economic planning agency said nearly 400 dams, most of them small, were damaged by the quake.

Hundreds of rivers snake through the mountainous Tibetan plateau before descending into the fertile Sichuan basin where they provide critical irrigation.

The activist group International Rivers Network was involved in a campaign in 2001 and 2002 to protest funding for the Zipingpu Dam because of its proximity to a fault line, said Aviva Imhoff, the group's campaigns director.

Imhoff said the group obtained transcripts of a 2000 internal government meeting in which seismologists warned officials of the dangers of constructing the dam and the potential for it to be damaged in an earthquake, Imhoff said.

The massive Three Gorges dam, the world's largest, is about 350 miles east of the epicenter. The information office of State Council Three Gorges Construction Committee said earlier this week that there was no damage to the dam.

Official toll nears 15,000
The official death toll rose Wednesday to 14,866, and in Sichuan province another 25,788 people were buried and 1,405 were missing, provincial vice governor Li Chengyun said, according to Xinhua.

An already massive military operation gathered pace with close to 100,000 soldiers and police mobilized. After two days of rain that prevented relief flights, People's Liberation Army helicopters flew 90 sorties to the epicenter in Wenchuan county and other areas to drop food, medicine and tents and ferry out 156 injured people, Xinhua reported.

Aerial TV footage showed rows of small buildings flattened in Yingxiu in Wenchuan county, where rescuers who hiked in said they found only 2,300 survivors in the town of about 10,000, with another 1,000 badly hurt, Xinhua reported.

Video   Rescue efforts encounter obstacles May 14: NBC's Adrienne Mong reports survivors continue to be pulled from the rubble in China's Sichuan province, despite mounting obstacles. MSNBC

The scale of the devastation is raising questions about the quality of China's recent construction boom. Some builders cut corners, especially in outlying areas largely populated by the very young and very old.

With help slow in arriving, some fled Yingxiu on foot, carrying injured family members in wheelbarrows. One woman "carried a dead infant wrapped in white clothes as if the baby was alive," the agency said, citing a reporter who hiked to the area with military rescue teams.

Ships from a temporary dock built at a reservoir sailed to Yingxiu, but blocked roads meant heavy digging equipment could not be brought in. Most rescuers were using their hands, Xinhua reported.

The death toll from the quake was expected to rise when rescuers reach other towns in Wenchuan county that are still cut off.

"The Communist Party Central Committee has not forgotten this place," Premier Wen Jiabao said after flying by helicopter to Wenchuan.

President Hu Jintao presided at an emergency meeting of the party's powerful Politburo, urging the military, police and others to redouble rescue and relief efforts.

Unlike previous natural disasters in China, official media have reported prominently on the quake, and state TV replaced regular programming with 24-hour coverage.

Scenes of destruction and death have been shown with a prominent focus on Wen, the normally staid leadership's most popular member who has been shown crawling into collapsed buildings to urge survivors to hang on with impassioned pleas and reassuring children who lost parents.

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