I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

Liu Tan never thought that the dam could be built so quickly. He has also read a lot of information about the previous construction of dikes. In this era, building dikes is a very large project, requiring a lot of manpower and material resources, not to mention them. It is also necessary to dig canals to introduce water into the inner lake.

According to previous records, Liu Tan calculated that even if they could shorten the construction period, it would take at least three or four months, and this was on the premise that the first dam was not large.

Because it was a good omen and to accumulate experience, they all chose a relatively small dam for the first dam. Small means that it is easy to control, and it also means that there are not many places that are prone to problems.

Xu Lin is not very confident in himself, there are a lot of things to calculate in the embankment, and he has never been good at this aspect.

Even many calculations are specific data obtained with the assistance of the King of the North.

This made Xu Lin particularly admire Liu Tan. He did not expect that His Royal Highness the King of the Northern Realm would also have an unparalleled talent in spells.

If Liu Tan knew what he was thinking, he would probably tell him seriously that this is not just simple mathematics, but physics.

But even if it is simple physics, Liu Tan has not touched it for a long time, and he vaguely remembers a few formulas, but he is not sure if it is correct. Finally, after calculating the result with Xu Lin, he is a little worried, for fear that he will give Xu Lin Take it to the ditch.

So after Xu Lin wrote a letter stating that the dam was fully prepared, Liu Tan decided to go to the scene to see it by himself. If something really went wrong with the dam, he could take the initiative to take the blame on the spot.

After getting in touch with Xu Lin, he found that he was both confident and inferior. His confidence came from his knowledge of mountains and rivers and geography, while his inferiority came from his physical defects.

If such a person is hit in the field he is proud of, he will either fail or be reborn from the ashes.

Liu Tan thought for a while and decided not to test Xu Lin with this. For this era, Xu Lin is already a rare talent.

He approached Huo Guang and said, "I'm leaving for Lingfu County the day after tomorrow. I don't know when I'll be back."

Huo Guang was a little surprised: "The dam is really repaired?"

Liu Tan nodded: "Since Xu Lin said so, there must be no problem, and he is not a person who is very happy."

Huo Guang still couldn't believe it: "How long has it been? Less than two months, how did you do it?"

Liu Tan said: "I don't know, don't ask me, I thought it would take at least three months."

Huo Guang was also very curious. To be honest, he also wanted to see what the first dam in the northern border country looked like.

He coughed lightly and said, "Recently things have been arranged almost, and there should be no special circumstances."

Liu Tan looked up at him and asked seriously, "Do you want to go too?"

Huo Guang looked serious: "The first dam in the Northern Borderlands is of great significance and should be taken seriously."

Liu Tan thinks about it since he came to the northern border country, Huo Guang seems to rarely leave the capital, he can still run around anyway, only Huo Guang needs to stay in the capital to deal with various things.

Thinking of this, he said decisively: "The Prime Minister of the country will follow along, and let Lin Xiu look after the house!"

Huo Guang raised the corner of his mouth slightly: "Okay, I'm going to pack my things."

After he left, Liu Tan turned his head and asked, "Where's Gong Shuyi? Has the thing he asked to do before produced results?"

He originally wanted to use the wheelchair as Xu Lin's birthday present, but Gongshu also encountered some bottlenecks, and he wanted to do better but failed to catch up.

It would be great if I can catch up this time, and I can give Xu Lin a congratulatory gift by the way.

Gongshu did not disappoint Liu Tan, and delivered the finished product directly.

And he said with some embarrassment: "The wheels of the chair are a bit hard. If the ground is not flat, it may be bumpy. I mixed some rice husks for shock absorption in the middle, but these things need to be replaced frequently, and the effect is average. After that, I will Continue to look for other alternatives.”

Shock absorption, Liu talked about rubber, but unfortunately, the rubber that has been used in later generations is imported from outside. Now it doesn’t matter whether there are rubber trees, anyway, there are no rubber trees now.

If it was a weekday, he would still think about what could be replaced, but now that he was in a hurry to go to Lingfu County, he had to put this matter aside.

When Liu Tan arrived in Lingfu County, Xu Lin brought people out to meet him.

When Liu Tan saw him, he smiled and said: "When I received your news before, I thought the speed was a little too fast, but now it seems that it's a little earlier. I managed to get better in the capital before, but now Lose weight again, if there is no problem with this dam, you can rest for a few days."

Xu Lin originally wanted to report the current situation to Liu Tan, but he didn't expect Liu to notice that he lost weight first, and couldn't help feeling warm in his heart and said in a low voice, "I...don't think too much tired."

Liu Tan shook his head: "You are supporting it with enthusiasm now, so you don't feel tired, but you still need to take good care of your body, not to mention anything else. You see, the Yellow River is so long. Since you have already started to control the water, you can't give up halfway, right?"

After hearing this, Xu Lin said, "What Your Highness said is true, I obey the order."

Only then did Liu Tan laugh and said, "Have you decided when to release the water?"

"The auspicious time is at noon the day after tomorrow."

Liu Tan said: "That's just right, let's talk about it, did you encounter any difficulties this time, and how did you do it so quickly?"

Xu Lin said with a little excitement: "I reported the time before and the time was actually estimated based on past experience, but I didn't expect that the iron bars and cement made by His Highness are so easy to use, and because there is a cement road, it is more convenient to transport, invisible. It saves a lot of time.”

Liu Tan said: "Even so, it is impossible to directly shorten the construction period by one month."

Xu Lin explained: "The place that wasted the most time before was actually digging ditches. The oxbow lake has expanded a little before, and there is no need to rest. If the ditches are calculated based on the original number of peasants, it will indeed take so much time. ,but……"

Xu Lin couldn't restrain the smile on his face and said: "When digging the canal, the local people spontaneously organized to help, which made the progress much faster."

After hearing this, Huo Guang couldn't help asking: "People? Now is the time for spring plowing, where do people have time?"

Xu Lin turned his head and said in the direction of Liu Tan: "This is also thanks to Your Highness. If His Highness hadn't made the Northern Border Plow and allowed the farmers to trade in the old plow for a new plow, they really don't have time, but they can buy a new plow. After plowing, these plows were able to plow the land and sow seeds at the same time, which made them a lot easier, and they were grateful for His Highness's kindness in their hearts, and the canal was also related to their own land, so they came to help."

Liu Tan also had a smile on his face after hearing this: "I thought the promotion of Beijingli would take a lot of time, but I didn't expect it to go so smoothly?"

Huo Guang is not as optimistic as he is: "The people around the capital are more receptive, other places... I'm afraid we have to take it slowly."

Liu Tan looked indifferent: "It doesn't matter, sooner or later they will be willing."

The promotion of the new plow court is almost doing things at a loss. Those old plows are collected, that is, the metal parts can be recycled and reused, and the remaining wooden parts can be used as firewood. No one would want to buy another plow.

Seeing Xu Lin's tired face, Liu Tan said, "Okay, let's rest first, and see how to release the water the day after tomorrow."

On the third day when Liu Tan talked about Lingfu County, he set off early in the morning to the place where the dam was located. There were already many people standing on the opposite bank of Liu Tan and them.

Different from the kind of dam he imagined, this dam is actually a bit miniature. According to the data reported by Xu Lin, the horizontal direction is at most more than 20 meters.

It's just that the body shape of the gravity dam naturally gives people a sense of stability and reliability.

The embankment of the Yellow River has dug a gap leading to the canal, but at this time the outlet of the dam is closed.

Standing on the dam, Liu Tan saw the calm Yellow River at a glance, then looked down at the turbid river water blocked by the dam, and said without thinking: "Saltwood must continue to be planted."

Huo Guang's heart tightened for fear that he would lose patience, so he said, "It takes time for saltwood to grow."

Liu Tan nodded and came down from the embankment. Xu Lin said, "Your Highness, the auspicious time has come."

Liu Tan turned his head to look at the dam carrying countless people's hopes, and said slowly, "Open the gate."

The closed gate of the dam slowly opened, and the water flow poured down from the gate of the dam from small to large. The unclear water roared and rushed along the dug channel all the way to the direction of the oxbow lake.

There was a burst of cheers, Liu Tan looked up and found the people on the opposite side cheering and shouting: "There is water, there is water!"