This paper describes the design and implementation of a manhole cover monitoring system based on a long-range (LoRa) wireless sensor network with ultra-low power consumption. The LoRa wireless network of sensor nodes is affixed to the underside of manhole covers. They consist of a microcontroller, an accelerometer sensor, a LoRa Ra-02 module, and batteries. Sensor nodes capture and send the collected data periodically to a gateway via LoRa wireless transmission. When it detects that the manhole cover has shifted above the pre-programmed threshold, it will sound a local buzzer. The network gateway consists of a microcontroller with integrated Wi-Fi connectivity and a LoRa transceiver. It takes data from the sensor network and uploads it to the myDevices Cayenne database. The suggested system's purpose is to monitor the status of manhole cover opening and closing in real-time at a reasonable cost. Research results can be used to aid in the management and warning of manhole cover loss in order to reduce property damage and its impact on human life.